For other watchers wanting to go stage 2 id be careful, the STI can run lean with intake and exhaust and basically maxes the injectors out. its either best to go stage 1+ or stage 3 (stage 2 but with fuel injectors and fuel pump)
My tuner and I said the same thing. This is my 5th STI over the years, and with similar mods, we have only ever achieved 303whp. When we saw 320's, we thought it was either a hail mary pull or that it was an error and did another pull just to confirm. With regards to the 337, that was with 21lbs of boost. For the final tune, we dialed it back to 19.2lbs simply for reliability. Myself personally, I dont care to make massive power, I am in pursuit of good power reliably. I drive the car hard and want to make sure I can keep doing so, especially since I plan to track the car on occasion.
I own a 2015 with Cobb Big SF Intake with the turbo inlet pipe and Accessport. It's getting ready to have the Cobb Downpipe and Titanium Exhaust installed and protuned in a few weeks. Also with the Cobb Turbo Blanket, bypass valve and 3 port solenoid at the same time. The Perrin Transmission Mount and pitch stop brace and mount I just installed. I hope I can make at least 315 whp. I also want good power to reliability. I'm track focused, not raw drag racing type of power. 21lbs of boost is pushing the limits I think. Lol
@@Mikey6048 Awesome man. Sounds like a solid build. With STI's one of the primary gains for the car is the downpipe. Swapping to aftermarket there is already a good gain. Coupling that with everything else, I think you be happy. With regards to 21 lbs of boost, that is pushing the limits of a stock EJ257, especcially when in colder weather, that can spike higher. I've had friends run 24 lbs, but they also ended up replacing the block a while later. If you wanted to go higher boost, there are of course options to do so. You can always have the block pinned (where they install metal pins down the side walls of the cylinders), sleeved (They can carve out the existing cylinders and installed new stronger ones), or go closed deck. As im sure you can image, all options are pricey... Once you get tuned though, let us know how the numbers came back. I always recommend an oil change right before the tuning session, since you will be loading the engine down low. Plus fresh fluids have less viscosity and allow things to move better.
UNTCHD this would be right around 244kw I believe if the google conversion is correct. So far, I have put 12,000 miles on the car since tuning, and most of those miles have not been very nice. Where I live, getting on the highway at less than 90mph is suicide and entrance ramps are like drag strips. A lot of the reliability depends on the tune, driving style, parts, and maintenance. I hope to be putting a video out in the next week about this. If you haven’t already, hit that subscribe button to get notified when I publish it.
UNTCHD the reliability of the engine depends on several factors, including the tuners ability to make sure the values are within safety tolerances. Couple that with driving style, maintenance, quality parts, etc. you should be good. The BIGGEST problem I have seen for why engines blow boils down to driving style. People drive the cars lazy and don’t down shift to accelerate. Doing so lugs the engine and forces it to burn rich cracking the ring lands. The other issue is related to over revving the engine. I make sure to stay out of redline. This is due to high heat loads and possibly of spinning a bearing.
I had. 2004 sti with upgraded turbo, i love Subaru’s, but the golf r im driving now its on a different level. With those dyno numbers you wont even touch a gti. A gti can put down 380whp with a tune, dp and hpfp on full e85. Subaru need to step up the game
For me, horsepower isn't everything. While I do agree, Subaru does need to step up their game as they have been running the same platform since 2004 in the US; however, you have to realize that on this tune, I am only running 93 octane. With E85, bigger injectors and a fuel pump, I wouldn't be that far behind. For me, the reason I choose the Subaru is because I am a large fella (6'4", 310lbs) and the subaru interior is very accommodating. Also, I have three kids that are all in car seats, which by some miracle and a little butter, they all fit. It really just depends on what you're after. The other major reasons I prefer my subaru is the sound. I love the boxer rumble. Also, the appearance. Some people dont like the big wing and aggressive fenders and hood scoop, but for me, I love it. I want something that people look at and ask what it is or take pictures of it. For me, the golf just blends in a little bit too much. In the end, to each their own. When I do go e85, Ill be sure to repost the numbers for you... For the moment though, I have some cosmetics in the works
Great information in these comments! Still have a LOONNGGG way to go till my warranty is done, but I wanna do a similar set up. Really just want an exhaust, and want reliability.
Nice video. This is what I want to do to my STI. Downpipe, ebcs, cold air intake, and protune. Can you post a video doing some pulls and outside shots? Thanks!!
What PSI was it pushing on the final 324hp wheel HP tune? My 2016 is 309whp at 19psi. Tomei EL headers, Invida catted downpipe, COBB turbo inlet, Mushimoto CAI, Invida N1 cat back, custom tune.
Loved the Dyno. Just an FYI, you need a better microphone; something that makes you more clear than muffled. Other than that, loved the video. Keep up the good work!
Thank you, and I agree. I actually just picked up a new microphone and amplifier the other day because of it so hopefully that is better. I appreciate the feedback!
About to go stage 2 with mine, gs up pipe, tial 38mm ewg, 3 inch invidia dp(cat on lower half), cobbs sf intake, and gs intercooler for further upgrades 😀, and cobbs ebcs. On stage "0" tuned at 19.7 peak boost on a cool day, 19 on a bad hot day.
OreoThePanda outstanding man! Let’s see those numbers! I plan to go EWG with my next build. I had it on my 2010 STI and loved the insane acceleration. Keep us posted on your build!
@@DIYFabrications will do, gotta hunt for another dp, sale fell through cause ups decided to up the shipping cost up to twice the amount we were quoted for wooooooo! Edit: parts coming in set is complete, will be installing everything in about a week and a half from now. And if you decide to go ewg with ur sti, get a downpipe with a cat down towards the lower bung. More room for the external wastegate and dump tube/screamer pipe! Will be maxing out the stock vf48 turbo on 93 oct (lack of e-85 where am at), using cobbs ebcs, changed to invidia downpipe. All piping will be given the grimspeed gaskets treatment.
DIY Fabrications they have big V8 man lol but so glad you replied so essentially I already have a borla cat back exhaust all I need is the boost control, down-pipe, access port ,and SF intake, so I’m looking forward to that
@@LT4_Gio28 Yeah. I knew I didn't really have a chance, but always fun to run. I'll be looking forward to hearing your numbers. The down-pipe is the main gain coupled with the accessport. Just make sure to get a pro-tune. Keep us posted!
DIY Fabrications I meant to ask you are you running stage 2+ or just stage 2 someone said the fuel injectors can’t keep up but that was in 2018 when they didn’t have a stage 2+ map when you could only run the intake or the down pipe...
SO essentially for perforance mods you just got the intake and a downpipe and a boost controller making 330 whp? What kind of dyno is that? Must be a high reading one. From what ive seen stock 19+ sti's are about 250-270 whp stock and then with the intake and downpipe without maxing the injectors or fuel upgrades its about 300 whp with a protune give or take.
iOnlyGame yes. Stock fuel pump and injectors. They were one of my limiting factors. Tuner capped the injector duty cycle at 85% based on that days weather conditions so if any additional fuel was needed, the car could adjust. (I.e.: on a really cold day when the air is denser, the car can compensate and provide the necessary fueling and not go lean) So far to date, the highest injector duty cycle I’ve logged is 91.4%.
@@iOnlyGame Yes, I would actually recommend upgrading the fuel system. Just keep in mind, you will need to be tuned with those upgrades. Happy to go further into detail if you would like.
I noticed that you did not add any fuel mods with this configuration. What is your Injector Duty Cycle % at? Most importantly, are you leaning out with the stock fuel system setup?
ibp4da97 hey there. Correct. I am still running stock fuel system. Typical injector duty cycle at wide open throttle is 84%. The highest I have ever seen, when we had some cold weather was 87.9%. My tuner always leaves room to ensure I don’t go lean under load regardless of weather conditions. When I go further, the fuel system will need an upgrade.
What was the stock injector duty cycle at? You won’t have any problems with the stock pump and injectors? Because that’s what I want to do to mine, catback, downpipe and intake.
Alberto Ortiz - according to the data log I just took. Injector fury cycle is capping at 84.34%. Factory fuel pump and injectors are fine for the setup I am running (intake, down-pipe, boost controller and exhaust). If you want to run E85 or larger turbo, then you’ll need to upgrade the fuel system.
I've got the same set up as you and on my protune I've have seen 103% idc and 21.6 peak boost. It's rare but sometimes happens, curious if this seems normal and if you have seen similar numbers on your tune thanks.
The most I’ve ever seen with my IDC is 92%. My tuner left a fair amount of room in the fueling map to not max out the injectors. I would be a little concerned that you are going lean if your getting duty cycles that high, but if your AFR’s are staying rich, it might be ok. Every tuner tunes slightly different. As for boost target. My boost target on S# is 18.9lbs. I occasionally spike to 19.2. Not worried about that tho.
It would be a decent upgrade. You just need to keep it clean. If you will be rallying in any type of puddles, make sure you upgrade to a snorkeled version. Cobb makes a nice version.
Alright guys, so y'all have asked a bunch of great questions and I felt it might be a good idea. I talked with my tuner and am going to arrange a Q&A with him to help answer some of the questions you all have. If you have a list of questions you would like me to ask, please let me know. Thank you,
@@finnfox5 the tuner can tune the car based on the mods that are present. In the case of this video, the car was still running stock injectors and fuel pump. The tuner can adjust the mapping to keep the car from going lean; however, it was something that I always monitored. The only time I ever found myself concerned (hitting 100% duty cycle on the injectors) was during an unexpectedly cold day last winter. Otherwise, the car hasn’t shown any issues. Since this tune, the car has done around 25k miles.
@@DIYFabrications then the tuner is wrong. 100% the injectors duty cycle is maxed out. Older Subarus you don’t need to upgrade for stage 2. But for the VA chassis you must. Looks like forged in Atlanta… shame.
Absolutely. I am actually working on installing some artwork in my garage to have a bit nicer of a backdrop for filming, where I plan to do an update video and answer any questions people may have. Plenty more coming down the pipeline!
When shopping for a down pipe does it matter where they place the high flow catt or is there a difference in having "divorced" pipe? I'm Looking between cobb and nameless both catted.
Hey. My apologies for the delayed response. So the cat can go anywhere between the turbo and the rear AFR sensor. Cobb makes solid stuff. Always loved my Cobb products. Divorced waste gate pipe just reduces the turbulence in the down pipe by having it re-enter down stream.
Downpipe was on there as well. Turbo XS with the test pipe installed (no cat). The amount of time was due to several things. 1). My tuner hadn’t tuned a VF chassis subaru yet, so he had no baseline tune. Wasn’t that hard, but needed to do that first. 2) We also ran into some technical issues with the dyno. The AFR readout wouldn’t connect at first. We had to pinch the wire a specific way. At the end of the day, yes it was a long time, but that is partly because my tuner is incredibly meticulous and with each pull he would see somewhere something else could be corrected. While I’m sure it could have been done in two hours and far less pulls, with him, I just let him get in the zone and do his thing.
@@DIYFabrications I am just curious but Cobb told me it wasn't safe to run an intake and a turbo back exhaust set up because the injectors can't keep up. Is this something that can be avoided with a custom tune?
@@jtbhockey No worries John. Cobb does not currently have an off the shelf (OTS) tune for a vehicle running both a down pipe/turbo back and an intake. They used to for older model WRX's and STI's; however, for the newer year models they don't. So with regards to their available tunes that are free to download and install, they are correct. They do not have an option available for you. To add a quick note, all of the free OTS tunes that Cobb has available are only meant to be run for a short period of time until you can get a professional tune done. Every car is slightly different and the tuning needs to be adjusted. Although the cobb tunes are fairly conservative, there is still room for improvement. If you intend to install an aftermarket downpipe and intake, you can still drive your car; however, avoid driving aggressively until a pro-tune is completed. Note: Cobb does offer professional tuning services. With regards to a pro-tune, during a tuning session, the tuner will pull up the engine's control tables and manually adjust those tables to make the car and engine run smoother based on the equipment that is installed on your car. With every turning session you hit the maximum threshold of some element. For some, it may be the injector size. For others, it might be the turbo or boost levels that the engine block can handle. That maximum threshold is the limiting factor for your power output. A good tuner will know what safety elements need to kept in mind. For instance, a factory Subaru engine block should be capped at 21lbs of boost due to the cylinder walls. For my tuning session, the cap was the boost level, with a close second being the injector size. We have the car setup when in sport# to target 21lbs boost, with injectors duty cycle around 84% at wide open throttle (varies based at RPM range). When I go to build the car further, I will need to upgrade the injectors, in addition to the other supporting items. I hope this helps and I am happy to discuss further.
@@DIYFabrications thank you so much. I appreciate it. I had a 2013 STI and just bought a 2019 and wanted to run a setup similar to yours without having to choose an intake or downpipe. Still not sure what I'll do but you gave me a lot of good info! Thank you!
@@jtbhockey No worries at all. Thats one of the reasons I started this channel was to educate others. I have been building WRX's and STI's for 12 years, owning 5 of them and building dozens of them. Any more questions, please feel free to reach out. If I don't know the answer, I may know someone who does.
Ultimately, your tuner will design to tune based on the items on the car. If we want to take the car any further, a fuel system upgrade will be needed. For us, the fueling and boost were the limiting factors. My tuner built in some safe margins with the fueling (capping it around 84%) to ensure that if colder weather was there, they could still supply enough fuel and not lean out the car. If you want to maximize the cars potential, I would recommend doing a fuel system upgrade. The reason I held off is because I plan to go E85 and wanted to wait until I was ready to commit to it.
I hace a 2019 sti. Installed accessport v3, intake, down pipe nvidia no catalytic. Stock cat back. And running with stage 2 Cobb. Can I do a protune with????. Thanks for your help.
Congrats on the 2019 STI! With regards to turning, technically you can have the car professionally tuned at any time as long as you have some way to access the car's computer (i.e.: an Accessport). In your case, given your modifications, If you are running one of the "off the shelf" maps from Cobb, I would definitely recommend a protune. Your setup is actually fairly similar to mine... You should expect to pick up an additional 25-40 horsepower as the timing on the Cobb maps is fairly conservative. In reality, anytime you start adding more modifications to the car, you may need a retune or have a touch up tune done. Typically, what I do is phase out my updates. I will leave the car alone for a little while and then start purchasing parts for the next phase or build. Ill install them all at one time, and then do a retune. That way I am not having the car tuned all the time. Quick question for you. Seeing that you are catless downpipe, are you throwing a check engine code (PO420)? If you are, during the protune, they can disable this code for you.
@@DIYFabrications I don't have any error codes. Running with cobb accessport stage2. Downpipe stock cat back. Intake K&N. GFB blow off valve. My mechanic said that we need new injectors, fuel pump and boost controler. What do you think about. Thanks for your help and your time.
@@yulianruiz119 With that setup, you should be alright with the injectors and fuel pump unless you want to run e85. On standard 93 octane pump gas, you will be close to maxing them out, but not quite. I am running at 85% duty cycle at wide open throttle. Stock injectors, according to Subaru, are the same 565cc injectors they have used since 2006. Just keep in mind, if you want to go any further with a larger intercooler, bigger turbo, etc. then yes, you will need to upgrade those items. Also, if you want to do e85, you will definitely want to swap injectors and fuel pump and pick up an E85 kit for all the fittings. Boost controller you will probably want. The OEM boost controller is typically only good for 18lbs. Sometimes it will let you go a little higher in cold weather, but it can throw a check engine code for over boosting. I swapped mine out for a grimmspeed three port to make sure I dont have issues at 20 lbs, plus they aren't very expensive. If you want a good source to buy parts, let me know.
@@yulianruiz119 reach out to Importimageracing. If your on facebook, you can find Joshua Michael Nahm (the owner), he has pretty much everything you could ever want for your car. Also, his prices are rarely ever beaten. When you go to tune, let me know how it goes!
Mmmbstt 914 if your protuning, you can. If your trying to run an OTS tune, Cobb does not offer a tune for this. With a protune, the tuner sets the parameters for the car based on a limiting factor. That limiting factor could be boost level, injector duty, etc. For my car, the fueling was one of my limiting factors. If I want to go any further, I will need to upgrade the fueling system. In fact, my next “build” will probably be injectors, EWG, fuel pump, flex fuel, and some other little goodies.
There are many factors that will effect the results. The type of dyno, the temperature, humidity, the tune itself (My tuner might have parameters setup differently),... What numbers did you end up with?
@@O_ADG Oh, your right in the same ballpark. I had a few more HP, but you had more torque. Solid numbers though and right within the expected range. Even more impressive is doing it at 92 degrees.
kuubσ this isn’t a chip tune, it’s a pro-tune. With what you are seeing in this video, the parts were installed, and the protuner installs a baseline map. From there, he makes adjustment to all of the engineers parameters to run at optimal performance. That being, the potential for damage comes down to who your tuner is. I know many tuners in the industry, some are better than others. In the case of the gentleman that tunes my cars, he is the only person I trust to tune them. He knows how I drive and what my desire is. I want longevity with performance and he adjusts his tunes accordingly. Some people just want high horsepower at any cost.
So far, so good! I have put around 12,000 miles on the car and only had one minor issue during an insanely hot day (109 degrees) last summer, which I associate to extreme heat soak. Otherwise, she seems to be hold up well. I do drive the car aggressively, but always allow for adequate warm up. With regards to keeping an STI happy, a lot of that depends on how you drive the car. The most common issue why people have piston issues is due to lazy driving (not down shifting to accelerate). People tend to just mash the accelerator and it lugs the hell out of the engine causing it to burn rich. When your burning rich, your burning hot. When your burning hot, it causes the rings to fail or expand until they crack the crown of the piston... I hope to have some time here in the near future going over how to own and keep a Subaru reliable. If you haven't already, hit the subscribe button for new videos!
Yes. I had to cut it, but it is able to be used. If you have an angle grinder or Dremel, its not too bad to cut. I think I maintained two or three of the bolts for mounting
DIY Fabrications nice, that’s good news! Did you have to get a shield for the cv boot? I saw a picture of an install where the owner mentioned the dp comes very close to one of the cv joints and could burn a whole through the boots rubber.
juveb23 never had an issue with this. Typically I ceramic coat my down-pipe, so it’s far less of an issue. The only time I have been worried about heat near the CV boot is with an External Waste Gate with atmospheric dump. For that kit, the dump tube wraps around and over the CV boot on the EJ platform. At the moment, my downpipe is pretty far away from the CV. I’ll try and measure it later today.
Thanks for the reply’s man. I’m doing the exact same upgrades to mine (a few different brand and no axle back exhaust) and your video was spot on for what I needed to hear and see... 👍🏼 to you and your tuner! Did you ceramic coat the dp you put on this build?
juveb23 I haven’t yet. I have put about 12,000 miles on the car since the tune and really haven’t had any issues. When I go external waste gate, I will pull the DP off and ceramic coat all the components at once.
I'm afraid to answer this question, because as soon as I say yes, I know something will happen. So instead, Ill give you a rundown of how its been running to date. So far, I have not had a single issue in the 5500 miles that I have put on the car since this video was made; however, I have not driven it in all of the different temperature variations to date. I live in Atlanta GA, where it has been a brutal summer with over 90 days exceeding 90 degrees, and many exceeding 100 degrees. Currently, we are going through the time of year where it is 55 in the morning and mid 90's in the afternoon, and so far, no issues. That being said, the car is so much happier in the cooler weather. The spool is very quick and the car accelerates hard. That being said, I am burning a little bit more gas as a result. My fuel economy (I drive aggressively) is around 20-21 mpg. I will be interested to see how the car does in the extreme cold (teen's) so I can ensure that the injector duty cycle is still within tolerances. Mechanical Rundown: Intake: So far, no issues. Even when driving in major rain downpours Boost Controller: I have run the grimmspeed 3 port ebcs on 4 of my 5 STI's and I have never had a single issue with one of them. The only time I thought about switching it was when running an external waste gate. I will probably be adding an external waste gate in the next year, along with an E85 kit with fuel system upgrade, so I may swap it to a manual boost controller at that time. Down-pipe: So far so good. I had one small fitment issue on the catted section that I still need to resolve; however, I am emissions exempt for another 2 years, so I have just been running the test pipe. Remark Muffler Deletes: While the fitment and the welds are top notch, I do have two gripes. 1) The blue tip is beginning to come off. Honestly, I should have just done the polished tips. 2) when running the A/C in the car, I am getting a slight drone to the exhaust note. Beyond that, I am loving the current setup. I will admit though, I am already feeling the need for additional horsepower.
@@DIYFabrications I run the exact same set up except pro tuned on 91 octane. been riding it for about 10k miles and love it. got some goodies in that I will be installing here pretty soon
@@neikogarcia3041 Do you know what HP you're making? I'm thinking about getting the GrimmSpeed downpipe and the EBCS installed and etuned for now, eventually when I add more stuff to it i'll do a protune. I also have access to 91 octane only. Thanks!
MexicanSniperYT man with everything i got installed here recently I’ll be over 400 on e85. On 91 I’m a little under 400! I went with invidia on downpipe just because of the sale they had
@@DIYFabrications holy shit wtf. I thought they could barley handle a intake or a downpipe with stock fuel system. No shit you can go fbo basically on stock!?!?!? What the hell im ordering some shit now. I have a 2018 sti Cobb stage 1+ :/ rn.
Jose Hernandez - for this tune, we did not upgrade any of the fuel system. When doing a protune, the tuner will take into account all components that are installed on the vehicle. In this case, fueling was a limiting factor in why we couldn’t go any further. For the car to go to the next level, a fuel system upgrade will be needed. My tuner built in some safety margin on the fueling map to ensure it never goes lean under load.
DIY Fabrications right on that’s awesome I’ve been wanting to go stage 2 for some time now but I’m just trying to do my best research so I can safely build my STI and see what the cost will be thanks for the reply!
Jose Hernandez glad to hear it man. If I can be of any help, just let me know. My next upgrade will be flex fuel, injectors, fuel pump, external waste gate, probably a front mount to keep the intake temps down (I live in the south, so it’s hot!), and some other little items.
DIY Fabrications very nice, that’ll definitely add more power and keep the IAT down for sure. So you don’t always need upgraded fuel system for an intake and down pipe?
Jose Hernandez not if you are getting a protune. A protune will tune the car based on the items installed. One of those items is the fueling system. They will adjust the fueling map based on the factory injectors. In other words, the tune is done specifically for your car and only your car. Even if you had the exact same car as mine with the exact same mods, my tune would be close but not perfect for yours. The tuner will do the dyno pulls to get the map as close and smooth as possible, and will then take the car on the road and road tune to fine tune the final map to perfection.
jdowalgo2 for stock turbo and fueling, I was happy with it, but have plans to go higher. It’s still my daily for now, putting 80-100 miles a day on it in Atlanta traffic, so higher horsepower isn’t necessary. What type of horsepower are you making? What power additions are you running while still being reliable?
DIY Fabrications I was just making a general statement to the other gentleman. In no way was I disrespecting your car. I completely understand as I’m in Atlanta traffic every day myself. I’m too old for a STI, my toy is a 68 Camaro...
@@jdowalgo2 Have you ever felt 300whp? We all know you have no idea how hard it is to make that power in a all wheel drive platform. It is sick, and I'm sure he could eat that shit box camaro and still have enough fuel to last him days. No one said it was 700whp-800whp and no one needs that much. 340awhp is a damn good amount for city driving and it's practically Stock... Do you comprehend it's just a 4 cylinder??? Lol.
We were at the very limits of the stock injectors. My typical duty cycle is around 85% at WOT. To go any further with my car, I’ll need to do a fuel system upgrade (pump, injectors, etc.).
They dont. This was a dyno session with Pro-Tune. The accessport is just the piggyback to dial into the ECU. The maps that you get from Cobb are really only meant to be temporary until you can get a protune.
Great information in this video! Will folks be running into issues when using 91 OCT? I understand with your current setup it is running fine with 93 OCT. I would love to run an intake/catted DP/stock SPT exhaust/GBCS/Cobb AP all with a protune but afraid of running lean with 91 OCT. What is your opinion on this?
@@mybroolstory1015 The tuner will be able to adjust the tune to run 91 octane. The only difference in octanes is how much compression the fuel can handle before reaching the point of detonation. During the tuning session, just make sure the pro-tuner knows you are running 91 octane and they will adjust the ignition timing to account for it as the 91 octane. With regards to the setup, its a solid setup. For downpipes, I recommend the Cobb Catted Downpipe, as the fitment is perfect and the high flow catalytic converter doesn't cause a lot of back pressure. I personally am running the Turbo XS because it has the option to run a test pipe (catless) by just unbolting a small section and swapping it out.
For other watchers wanting to go stage 2 id be careful, the STI can run lean with intake and exhaust and basically maxes the injectors out. its either best to go stage 1+ or stage 3 (stage 2 but with fuel injectors and fuel pump)
337wh 378wtq. Save ya some time lol
SkyTheDestroyer- very impressive for stage 2 tbh
Stock BMW numbers. Definitely getting a 340i instead
@@CQBCARMINE44 cringe.
@@CQBCARMINE44 yea goodluck with that. lol
Alaire yeah but won’t last as long as a subie (just stating facts, not beef)
330s with just a Intake and downpipe basically? That's hard to believe. Not denying it. Just very good numbers for only those mods.
My tuner and I said the same thing. This is my 5th STI over the years, and with similar mods, we have only ever achieved 303whp.
When we saw 320's, we thought it was either a hail mary pull or that it was an error and did another pull just to confirm. With regards to the 337, that was with 21lbs of boost. For the final tune, we dialed it back to 19.2lbs simply for reliability. Myself personally, I dont care to make massive power, I am in pursuit of good power reliably. I drive the car hard and want to make sure I can keep doing so, especially since I plan to track the car on occasion.
I would say not too surprising. My bone stock 2019 Sti put down 281HP at the wheels. Me thinks the ‘19s are underrated.
I own a 2015 with Cobb Big SF Intake with the turbo inlet pipe and Accessport. It's getting ready to have the Cobb Downpipe and Titanium Exhaust installed and protuned in a few weeks. Also with the Cobb Turbo Blanket, bypass valve and 3 port solenoid at the same time.
The Perrin Transmission Mount and pitch stop brace and mount I just installed.
I hope I can make at least 315 whp. I also want good power to reliability. I'm track focused, not raw drag racing type of power.
21lbs of boost is pushing the limits I think. Lol
@@Mikey6048 Awesome man. Sounds like a solid build. With STI's one of the primary gains for the car is the downpipe. Swapping to aftermarket there is already a good gain. Coupling that with everything else, I think you be happy.
With regards to 21 lbs of boost, that is pushing the limits of a stock EJ257, especcially when in colder weather, that can spike higher. I've had friends run 24 lbs, but they also ended up replacing the block a while later. If you wanted to go higher boost, there are of course options to do so. You can always have the block pinned (where they install metal pins down the side walls of the cylinders), sleeved (They can carve out the existing cylinders and installed new stronger ones), or go closed deck. As im sure you can image, all options are pricey...
Once you get tuned though, let us know how the numbers came back. I always recommend an oil change right before the tuning session, since you will be loading the engine down low. Plus fresh fluids have less viscosity and allow things to move better.
The stage 2 package definitely wakes up the car.
Merkava4IMI yes it does! It’s a good safe place to be as well interns of reliability and cost. The next steps get a bit more expensive...
UNTCHD this would be right around 244kw I believe if the google conversion is correct. So far, I have put 12,000 miles on the car since tuning, and most of those miles have not been very nice. Where I live, getting on the highway at less than 90mph is suicide and entrance ramps are like drag strips. A lot of the reliability depends on the tune, driving style, parts, and maintenance. I hope to be putting a video out in the next week about this. If you haven’t already, hit that subscribe button to get notified when I publish it.
UNTCHD the reliability of the engine depends on several factors, including the tuners ability to make sure the values are within safety tolerances. Couple that with driving style, maintenance, quality parts, etc. you should be good. The BIGGEST problem I have seen for why engines blow boils down to driving style. People drive the cars lazy and don’t down shift to accelerate. Doing so lugs the engine and forces it to burn rich cracking the ring lands. The other issue is related to over revving the engine. I make sure to stay out of redline. This is due to high heat loads and possibly of spinning a bearing.
That’s crazy numbers for a stage 2 sti I’ve been planning on getting a 2019 in the next year or so and this just makes me more excited to get it
Crazy numbers?. For 8 mods I feel like those are some low numbers.
8 mods? It’s an intake, exhaust, and boost controller
I had. 2004 sti with upgraded turbo, i love Subaru’s, but the golf r im driving now its on a different level. With those dyno numbers you wont even touch a gti. A gti can put down 380whp with a tune, dp and hpfp on full e85. Subaru need to step up the game
For me, horsepower isn't everything. While I do agree, Subaru does need to step up their game as they have been running the same platform since 2004 in the US; however, you have to realize that on this tune, I am only running 93 octane. With E85, bigger injectors and a fuel pump, I wouldn't be that far behind.
For me, the reason I choose the Subaru is because I am a large fella (6'4", 310lbs) and the subaru interior is very accommodating. Also, I have three kids that are all in car seats, which by some miracle and a little butter, they all fit. It really just depends on what you're after.
The other major reasons I prefer my subaru is the sound. I love the boxer rumble. Also, the appearance. Some people dont like the big wing and aggressive fenders and hood scoop, but for me, I love it. I want something that people look at and ask what it is or take pictures of it. For me, the golf just blends in a little bit too much.
In the end, to each their own. When I do go e85, Ill be sure to repost the numbers for you... For the moment though, I have some cosmetics in the works
Great information in these comments! Still have a LOONNGGG way to go till my warranty is done, but I wanna do a similar set up. Really just want an exhaust, and want reliability.
philip lytle the stock engine bores me to death 🤦♂️. Unless I tracked it I’d be modifying it!
Thanks for that mount!!!!!!!
Nice video. This is what I want to do to my STI. Downpipe, ebcs, cold air intake, and protune. Can you post a video doing some pulls and outside shots? Thanks!!
I hope there’s more videos gonna be pumped out, I love Wrx sti videos
What PSI was it pushing on the final 324hp wheel HP tune? My 2016 is 309whp at 19psi. Tomei EL headers, Invida catted downpipe, COBB turbo inlet, Mushimoto CAI, Invida N1 cat back, custom tune.
Loved the Dyno. Just an FYI, you need a better microphone; something that makes you more clear than muffled. Other than that, loved the video. Keep up the good work!
Thank you, and I agree. I actually just picked up a new microphone and amplifier the other day because of it so hopefully that is better. I appreciate the feedback!
this goes crazy
Awesome!
3 years later how’s the car holding up and how many miles have you put ?
What mods do you have ?
Saw you on Peachtree industrial today 👍🏽
Bobby Hill hopefully I gave you a wave! Had the kids in car as well, so...
About to go stage 2 with mine, gs up pipe, tial 38mm ewg, 3 inch invidia dp(cat on lower half), cobbs sf intake, and gs intercooler for further upgrades 😀, and cobbs ebcs.
On stage "0" tuned at 19.7 peak boost on a cool day, 19 on a bad hot day.
OreoThePanda outstanding man! Let’s see those numbers! I plan to go EWG with my next build. I had it on my 2010 STI and loved the insane acceleration.
Keep us posted on your build!
@@DIYFabrications will do, gotta hunt for another dp, sale fell through cause ups decided to up the shipping cost up to twice the amount we were quoted for wooooooo!
Edit: parts coming in set is complete, will be installing everything in about a week and a half from now. And if you decide to go ewg with ur sti, get a downpipe with a cat down towards the lower bung. More room for the external wastegate and dump tube/screamer pipe!
Will be maxing out the stock vf48 turbo on 93 oct (lack of e-85 where am at), using cobbs ebcs, changed to invidia downpipe. All piping will be given the grimspeed gaskets treatment.
Wow Stage 2 put out 337hp that’s buck wild
Its a lot of fun, but its not enough... Had some fun playing with a new M5 and an AMG GT63, and while I was able to keep up, they still pulled ahead.
DIY Fabrications they have big V8 man lol but so glad you replied so essentially I already have a borla cat back exhaust all I need is the boost control, down-pipe, access port ,and SF intake, so I’m looking forward to that
@@LT4_Gio28 Yeah. I knew I didn't really have a chance, but always fun to run.
I'll be looking forward to hearing your numbers. The down-pipe is the main gain coupled with the accessport. Just make sure to get a pro-tune. Keep us posted!
DIY Fabrications gotcha man
DIY Fabrications I meant to ask you are you running stage 2+ or just stage 2 someone said the fuel injectors can’t keep up but that was in 2018 when they didn’t have a stage 2+ map when you could only run the intake or the down pipe...
What’s up man? This is tony from wrxatlanta. We met at Iron Age last week. I knew that car looks familiar lol
hahaha! Whats up man. You coming back out to Iron Age next time?
DIY Fabrications yeah man. I’ll try my best to get out. I love that place lol.
Where do you get that vent dash mount for accessport I need one of those. Very clean looking
Here you go man!
www.importimageracing.com/products/dialed-mounts-dock-mount-subaru-wrx-sti-2015-2020
I like the license plate
So your running a DP and an axel back but a stock mid pipe? Is that okay?
SO essentially for perforance mods you just got the intake and a downpipe and a boost controller making 330 whp? What kind of dyno is that? Must be a high reading one. From what ive seen stock 19+ sti's are about 250-270 whp stock and then with the intake and downpipe without maxing the injectors or fuel upgrades its about 300 whp with a protune give or take.
were you using stock injector and fuel pump with all those powers??
iOnlyGame yes. Stock fuel pump and injectors. They were one of my limiting factors. Tuner capped the injector duty cycle at 85% based on that days weather conditions so if any additional fuel was needed, the car could adjust. (I.e.: on a really cold day when the air is denser, the car can compensate and provide the necessary fueling and not go lean)
So far to date, the highest injector duty cycle I’ve logged is 91.4%.
Is it safe to run those mods with upgrading fuel system?
@@iOnlyGame Yes, I would actually recommend upgrading the fuel system. Just keep in mind, you will need to be tuned with those upgrades. Happy to go further into detail if you would like.
I noticed that you did not add any fuel mods with this configuration. What is your Injector Duty Cycle % at? Most importantly, are you leaning out with the stock fuel system setup?
ibp4da97 hey there. Correct. I am still running stock fuel system. Typical injector duty cycle at wide open throttle is 84%. The highest I have ever seen, when we had some cold weather was 87.9%. My tuner always leaves room to ensure I don’t go lean under load regardless of weather conditions. When I go further, the fuel system will need an upgrade.
No other mods on the car when tuning? Besides the ones in the description
Thanks correct! Stock piling now for the next round of upgrades, but it’s going to be a little while.
What was the stock injector duty cycle at? You won’t have any problems with the stock pump and injectors? Because that’s what I want to do to mine, catback, downpipe and intake.
Alberto Ortiz - according to the data log I just took. Injector fury cycle is capping at 84.34%. Factory fuel pump and injectors are fine for the setup I am running (intake, down-pipe, boost controller and exhaust).
If you want to run E85 or larger turbo, then you’ll need to upgrade the fuel system.
I've got the same set up as you and on my protune I've have seen 103% idc and 21.6 peak boost. It's rare but sometimes happens, curious if this seems normal and if you have seen similar numbers on your tune thanks.
The most I’ve ever seen with my IDC is 92%. My tuner left a fair amount of room in the fueling map to not max out the injectors. I would be a little concerned that you are going lean if your getting duty cycles that high, but if your AFR’s are staying rich, it might be ok. Every tuner tunes slightly different.
As for boost target. My boost target on S# is 18.9lbs. I occasionally spike to 19.2. Not worried about that tho.
@@DIYFabrications ok cool thanks for the info, I'm guessing a wideband sensor might be next so I could get accurate afr.
Would this Cobb intake be ideal for rally driving?
It would be a decent upgrade. You just need to keep it clean. If you will be rallying in any type of puddles, make sure you upgrade to a snorkeled version. Cobb makes a nice version.
Alright guys, so y'all have asked a bunch of great questions and I felt it might be a good idea. I talked with my tuner and am going to arrange a Q&A with him to help answer some of the questions you all have. If you have a list of questions you would like me to ask, please let me know.
Thank you,
DIY Fabrications is it on 93 or 91 octane?
SuddenSlip 93*
Does this car not require fuel mods even if pro tuned? Did I miss the fuel pump / injectors being upgraded part?
@@finnfox5 the tuner can tune the car based on the mods that are present. In the case of this video, the car was still running stock injectors and fuel pump. The tuner can adjust the mapping to keep the car from going lean; however, it was something that I always monitored. The only time I ever found myself concerned (hitting 100% duty cycle on the injectors) was during an unexpectedly cold day last winter. Otherwise, the car hasn’t shown any issues. Since this tune, the car has done around 25k miles.
@@DIYFabrications then the tuner is wrong. 100% the injectors duty cycle is maxed out. Older Subarus you don’t need to upgrade for stage 2. But for the VA chassis you must. Looks like forged in Atlanta… shame.
Great video . Can you give us a ej25 reliable build video ? I like how you inform .
Absolutely. I am actually working on installing some artwork in my garage to have a bit nicer of a backdrop for filming, where I plan to do an update video and answer any questions people may have.
Plenty more coming down the pipeline!
When shopping for a down pipe does it matter where they place the high flow catt or is there a difference in having "divorced" pipe? I'm Looking between cobb and nameless both catted.
Hey. My apologies for the delayed response. So the cat can go anywhere between the turbo and the rear AFR sensor. Cobb makes solid stuff. Always loved my Cobb products.
Divorced waste gate pipe just reduces the turbulence in the down pipe by having it re-enter down stream.
Dude 6 hours for one tune?? Stage 2 also requires a downpipe. But damn that should only take a few hours
Downpipe was on there as well. Turbo XS with the test pipe installed (no cat).
The amount of time was due to several things. 1). My tuner hadn’t tuned a VF chassis subaru yet, so he had no baseline tune. Wasn’t that hard, but needed to do that first. 2) We also ran into some technical issues with the dyno. The AFR readout wouldn’t connect at first. We had to pinch the wire a specific way.
At the end of the day, yes it was a long time, but that is partly because my tuner is incredibly meticulous and with each pull he would see somewhere something else could be corrected. While I’m sure it could have been done in two hours and far less pulls, with him, I just let him get in the zone and do his thing.
Did you have to upgrade any of the fueling like fuel pump or fuel injectors?
No. No modifications were needed for the fuel system. If you want to go to E85, then you will need a flex fuel kit, fuel pump, and injectors.
@@DIYFabrications I am just curious but Cobb told me it wasn't safe to run an intake and a turbo back exhaust set up because the injectors can't keep up. Is this something that can be avoided with a custom tune?
@@jtbhockey No worries John. Cobb does not currently have an off the shelf (OTS) tune for a vehicle running both a down pipe/turbo back and an intake. They used to for older model WRX's and STI's; however, for the newer year models they don't. So with regards to their available tunes that are free to download and install, they are correct. They do not have an option available for you. To add a quick note, all of the free OTS tunes that Cobb has available are only meant to be run for a short period of time until you can get a professional tune done. Every car is slightly different and the tuning needs to be adjusted. Although the cobb tunes are fairly conservative, there is still room for improvement. If you intend to install an aftermarket downpipe and intake, you can still drive your car; however, avoid driving aggressively until a pro-tune is completed. Note: Cobb does offer professional tuning services.
With regards to a pro-tune, during a tuning session, the tuner will pull up the engine's control tables and manually adjust those tables to make the car and engine run smoother based on the equipment that is installed on your car. With every turning session you hit the maximum threshold of some element. For some, it may be the injector size. For others, it might be the turbo or boost levels that the engine block can handle. That maximum threshold is the limiting factor for your power output. A good tuner will know what safety elements need to kept in mind. For instance, a factory Subaru engine block should be capped at 21lbs of boost due to the cylinder walls.
For my tuning session, the cap was the boost level, with a close second being the injector size. We have the car setup when in sport# to target 21lbs boost, with injectors duty cycle around 84% at wide open throttle (varies based at RPM range). When I go to build the car further, I will need to upgrade the injectors, in addition to the other supporting items.
I hope this helps and I am happy to discuss further.
@@DIYFabrications thank you so much. I appreciate it. I had a 2013 STI and just bought a 2019 and wanted to run a setup similar to yours without having to choose an intake or downpipe. Still not sure what I'll do but you gave me a lot of good info! Thank you!
@@jtbhockey No worries at all. Thats one of the reasons I started this channel was to educate others. I have been building WRX's and STI's for 12 years, owning 5 of them and building dozens of them. Any more questions, please feel free to reach out. If I don't know the answer, I may know someone who does.
intake AND downpipe with no fuel upgrades? I thought the injectors required an upgrade.
No need to respond, just read your reply to another eager subie owner lol
Ultimately, your tuner will design to tune based on the items on the car. If we want to take the car any further, a fuel system upgrade will be needed. For us, the fueling and boost were the limiting factors. My tuner built in some safe margins with the fueling (capping it around 84%) to ensure that if colder weather was there, they could still supply enough fuel and not lean out the car.
If you want to maximize the cars potential, I would recommend doing a fuel system upgrade. The reason I held off is because I plan to go E85 and wanted to wait until I was ready to commit to it.
I hace a 2019 sti. Installed accessport v3, intake, down pipe nvidia no catalytic. Stock cat back. And running with stage 2 Cobb. Can I do a protune with????. Thanks for your help.
Congrats on the 2019 STI! With regards to turning, technically you can have the car professionally tuned at any time as long as you have some way to access the car's computer (i.e.: an Accessport). In your case, given your modifications, If you are running one of the "off the shelf" maps from Cobb, I would definitely recommend a protune. Your setup is actually fairly similar to mine... You should expect to pick up an additional 25-40 horsepower as the timing on the Cobb maps is fairly conservative. In reality, anytime you start adding more modifications to the car, you may need a retune or have a touch up tune done. Typically, what I do is phase out my updates. I will leave the car alone for a little while and then start purchasing parts for the next phase or build. Ill install them all at one time, and then do a retune. That way I am not having the car tuned all the time.
Quick question for you. Seeing that you are catless downpipe, are you throwing a check engine code (PO420)? If you are, during the protune, they can disable this code for you.
@@DIYFabrications I don't have any error codes. Running with cobb accessport stage2. Downpipe stock cat back. Intake K&N. GFB blow off valve.
My mechanic said that we need new injectors, fuel pump and boost controler.
What do you think about. Thanks for your help and your time.
@@yulianruiz119 With that setup, you should be alright with the injectors and fuel pump unless you want to run e85. On standard 93 octane pump gas, you will be close to maxing them out, but not quite. I am running at 85% duty cycle at wide open throttle. Stock injectors, according to Subaru, are the same 565cc injectors they have used since 2006. Just keep in mind, if you want to go any further with a larger intercooler, bigger turbo, etc. then yes, you will need to upgrade those items. Also, if you want to do e85, you will definitely want to swap injectors and fuel pump and pick up an E85 kit for all the fittings.
Boost controller you will probably want. The OEM boost controller is typically only good for 18lbs. Sometimes it will let you go a little higher in cold weather, but it can throw a check engine code for over boosting. I swapped mine out for a grimmspeed three port to make sure I dont have issues at 20 lbs, plus they aren't very expensive. If you want a good source to buy parts, let me know.
@@DIYFabrications Yes I want buy a boost controller.
@@yulianruiz119 reach out to Importimageracing. If your on facebook, you can find Joshua Michael Nahm (the owner), he has pretty much everything you could ever want for your car. Also, his prices are rarely ever beaten.
When you go to tune, let me know how it goes!
I thought you couldnt run intake & downpipe at the same time because of the injectors & fuel?
Mmmbstt 914 if your protuning, you can. If your trying to run an OTS tune, Cobb does not offer a tune for this. With a protune, the tuner sets the parameters for the car based on a limiting factor. That limiting factor could be boost level, injector duty, etc. For my car, the fueling was one of my limiting factors. If I want to go any further, I will need to upgrade the fueling system. In fact, my next “build” will probably be injectors, EWG, fuel pump, flex fuel, and some other little goodies.
I have the same setup and I don’t get the same numbers on the Dyno
There are many factors that will effect the results. The type of dyno, the temperature, humidity, the tune itself (My tuner might have parameters setup differently),... What numbers did you end up with?
DIY Fabrications 330whp 381tq and it was about 92 degree out that day. they also had to pour water into the intercooler
@@O_ADG Oh, your right in the same ballpark. I had a few more HP, but you had more torque. Solid numbers though and right within the expected range. Even more impressive is doing it at 92 degrees.
DIY Fabrications they had to pour a bottle of water every two pulls and put three extra fans
Are you still running the same setup?
doesn’t the chiptuning damage the engine in any way?
kuubσ this isn’t a chip tune, it’s a pro-tune. With what you are seeing in this video, the parts were installed, and the protuner installs a baseline map. From there, he makes adjustment to all of the engineers parameters to run at optimal performance. That being, the potential for damage comes down to who your tuner is. I know many tuners in the industry, some are better than others. In the case of the gentleman that tunes my cars, he is the only person I trust to tune them. He knows how I drive and what my desire is. I want longevity with performance and he adjusts his tunes accordingly. Some people just want high horsepower at any cost.
DIY Fabrications oh okay I get it, thanks.
How has it held up after a year? I just got a Sti and want to tune it but heard stories about the gasket/pistons not holding up well.
So far, so good! I have put around 12,000 miles on the car and only had one minor issue during an insanely hot day (109 degrees) last summer, which I associate to extreme heat soak. Otherwise, she seems to be hold up well.
I do drive the car aggressively, but always allow for adequate warm up.
With regards to keeping an STI happy, a lot of that depends on how you drive the car. The most common issue why people have piston issues is due to lazy driving (not down shifting to accelerate). People tend to just mash the accelerator and it lugs the hell out of the engine causing it to burn rich. When your burning rich, your burning hot. When your burning hot, it causes the rings to fail or expand until they crack the crown of the piston...
I hope to have some time here in the near future going over how to own and keep a Subaru reliable. If you haven't already, hit the subscribe button for new videos!
by chance were you able to use the stock turbo heat shield?
Yes. I had to cut it, but it is able to be used. If you have an angle grinder or Dremel, its not too bad to cut. I think I maintained two or three of the bolts for mounting
DIY Fabrications nice, that’s good news! Did you have to get a shield for the cv boot? I saw a picture of an install where the owner mentioned the dp comes very close to one of the cv joints and could burn a whole through the boots rubber.
juveb23 never had an issue with this. Typically I ceramic coat my down-pipe, so it’s far less of an issue. The only time I have been worried about heat near the CV boot is with an External Waste Gate with atmospheric dump. For that kit, the dump tube wraps around and over the CV boot on the EJ platform.
At the moment, my downpipe is pretty far away from the CV. I’ll try and measure it later today.
Thanks for the reply’s man. I’m doing the exact same upgrades to mine (a few different brand and no axle back exhaust) and your video was spot on for what I needed to hear and see... 👍🏼 to you and your tuner! Did you ceramic coat the dp you put on this build?
juveb23 I haven’t yet. I have put about 12,000 miles on the car since the tune and really haven’t had any issues. When I go external waste gate, I will pull the DP off and ceramic coat all the components at once.
IS this reliable?
I'm afraid to answer this question, because as soon as I say yes, I know something will happen. So instead, Ill give you a rundown of how its been running to date.
So far, I have not had a single issue in the 5500 miles that I have put on the car since this video was made; however, I have not driven it in all of the different temperature variations to date. I live in Atlanta GA, where it has been a brutal summer with over 90 days exceeding 90 degrees, and many exceeding 100 degrees. Currently, we are going through the time of year where it is 55 in the morning and mid 90's in the afternoon, and so far, no issues. That being said, the car is so much happier in the cooler weather. The spool is very quick and the car accelerates hard. That being said, I am burning a little bit more gas as a result. My fuel economy (I drive aggressively) is around 20-21 mpg. I will be interested to see how the car does in the extreme cold (teen's) so I can ensure that the injector duty cycle is still within tolerances.
Mechanical Rundown:
Intake: So far, no issues. Even when driving in major rain downpours
Boost Controller: I have run the grimmspeed 3 port ebcs on 4 of my 5 STI's and I have never had a single issue with one of them. The only time I thought about switching it was when running an external waste gate. I will probably be adding an external waste gate in the next year, along with an E85 kit with fuel system upgrade, so I may swap it to a manual boost controller at that time.
Down-pipe: So far so good. I had one small fitment issue on the catted section that I still need to resolve; however, I am emissions exempt for another 2 years, so I have just been running the test pipe.
Remark Muffler Deletes: While the fitment and the welds are top notch, I do have two gripes. 1) The blue tip is beginning to come off. Honestly, I should have just done the polished tips. 2) when running the A/C in the car, I am getting a slight drone to the exhaust note.
Beyond that, I am loving the current setup. I will admit though, I am already feeling the need for additional horsepower.
@@DIYFabrications I run the exact same set up except pro tuned on 91 octane. been riding it for about 10k miles and love it. got some goodies in that I will be installing here pretty soon
Neiko Garcia can’t wait to see it man. I’ve had my tune going for about 9k miles and still going strong.
@@neikogarcia3041 Do you know what HP you're making? I'm thinking about getting the GrimmSpeed downpipe and the EBCS installed and etuned for now, eventually when I add more stuff to it i'll do a protune. I also have access to 91 octane only. Thanks!
MexicanSniperYT man with everything i got installed here recently I’ll be over 400 on e85. On 91 I’m a little under 400! I went with invidia on downpipe just because of the sale they had
Stock fuel system ??
Landon Giles correct. Fueling was one of my limiting factors on the tune. I plan to do a full upgrade in the coming months.
@@DIYFabrications holy shit wtf. I thought they could barley handle a intake or a downpipe with stock fuel system. No shit you can go fbo basically on stock!?!?!? What the hell im ordering some shit now. I have a 2018 sti Cobb stage 1+ :/ rn.
Just make sure you get a protune for it!
So how much hp is at this stage 2 too the crank?
Typical drive train loss on an AWD STI is 20%, so crank HP is around 420-430
DIY Fabrications nicee thanks!
You didn’t need any fuel modifications for this?
Jose Hernandez - for this tune, we did not upgrade any of the fuel system. When doing a protune, the tuner will take into account all components that are installed on the vehicle. In this case, fueling was a limiting factor in why we couldn’t go any further. For the car to go to the next level, a fuel system upgrade will be needed.
My tuner built in some safety margin on the fueling map to ensure it never goes lean under load.
DIY Fabrications right on that’s awesome I’ve been wanting to go stage 2 for some time now but I’m just trying to do my best research so I can safely build my STI and see what the cost will be thanks for the reply!
Jose Hernandez glad to hear it man. If I can be of any help, just let me know.
My next upgrade will be flex fuel, injectors, fuel pump, external waste gate, probably a front mount to keep the intake temps down (I live in the south, so it’s hot!), and some other little items.
DIY Fabrications very nice, that’ll definitely add more power and keep the IAT down for sure. So you don’t always need upgraded fuel system for an intake and down pipe?
Jose Hernandez not if you are getting a protune. A protune will tune the car based on the items installed. One of those items is the fueling system. They will adjust the fueling map based on the factory injectors. In other words, the tune is done specifically for your car and only your car. Even if you had the exact same car as mine with the exact same mods, my tune would be close but not perfect for yours. The tuner will do the dyno pulls to get the map as close and smooth as possible, and will then take the car on the road and road tune to fine tune the final map to perfection.
Whats about the car warranty?
Lets hope we don't need to use it... Technically, yes, remapping the ECU does void the manufacturers warranty.
Mustang or Dyno jet?
Dyno Jet
What fuel? 91?
93
pump or e85?
Pump - 93 octane
Is this tune on 91 or 93 octane?
93 octane
337awhp is sick.
Its a lot of fun. Ill be posting an "update" video soon, as well as answering questions yall might have. Stay tuned!
Alvin Reaper Not really
jdowalgo2 for stock turbo and fueling, I was happy with it, but have plans to go higher. It’s still my daily for now, putting 80-100 miles a day on it in Atlanta traffic, so higher horsepower isn’t necessary.
What type of horsepower are you making? What power additions are you running while still being reliable?
DIY Fabrications I was just making a general statement to the other gentleman. In no way was I disrespecting your car. I completely understand as I’m in Atlanta traffic every day myself. I’m too old for a STI, my toy is a 68 Camaro...
@@jdowalgo2 Have you ever felt 300whp? We all know you have no idea how hard it is to make that power in a all wheel drive platform. It is sick, and I'm sure he could eat that shit box camaro and still have enough fuel to last him days.
No one said it was 700whp-800whp and no one needs that much. 340awhp is a damn good amount for city driving and it's practically Stock... Do you comprehend it's just a 4 cylinder??? Lol.
Stock injectors or upgrade ideal at this point?
We were at the very limits of the stock injectors. My typical duty cycle is around 85% at WOT. To go any further with my car, I’ll need to do a fuel system upgrade (pump, injectors, etc.).
Tuned on 93?
Yes. 93 octane. Sorry for the delayed response
@@DIYFabrications thanks
Sab
Min
Sen
Sel
Rab
Kam
Jum
Sab
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6HOURS PLUS need a better tuner.
I thought Cobb don’t have a stage 2 map?
They dont. This was a dyno session with Pro-Tune. The accessport is just the piggyback to dial into the ECU. The maps that you get from Cobb are really only meant to be temporary until you can get a protune.
What boost? What fuel?
Ryan Freimark
20.1 lbs boost
Stock VF52 Turbo
93 octane (premium) gasoline
Great information in this video! Will folks be running into issues when using 91 OCT? I understand with your current setup it is running fine with 93 OCT. I would love to run an intake/catted DP/stock SPT exhaust/GBCS/Cobb AP all with a protune but afraid of running lean with 91 OCT.
What is your opinion on this?
@@mybroolstory1015 The tuner will be able to adjust the tune to run 91 octane. The only difference in octanes is how much compression the fuel can handle before reaching the point of detonation. During the tuning session, just make sure the pro-tuner knows you are running 91 octane and they will adjust the ignition timing to account for it as the 91 octane.
With regards to the setup, its a solid setup. For downpipes, I recommend the Cobb Catted Downpipe, as the fitment is perfect and the high flow catalytic converter doesn't cause a lot of back pressure. I personally am running the Turbo XS because it has the option to run a test pipe (catless) by just unbolting a small section and swapping it out.
93 or 91 Octane?
SuddenSlip 93 octane