One of the most discussed topics with turbo conversions! Hope this clears some things up about fuel system upgrades. IG: @thecarpassionchannel SC: carpassionch
The relay being pulled at the beginning is the fuel injector fuse. It is recommended that the actual fuel pump relay be removed which is located above the accelerator in a strange plug usually yellow or green colored on later models.
Just wanted to say watching your videos expired me to get a Miata. Thank you man for making all these videos. It would make my job much easier to fix up my car once I get it. Your the best! Keep up the great work !
Great video Greg! As always good explained. I had to laugh when you explained the air/fuel ratio with your tomato garden, but it was a good idea to take this example. I think everyone understands now how it works. I always love when a new video from the CPC pops up! Great work👍👍
hahaha "I need to call up the water company to give me more fuel flow so I can water my tomatoes that are in a different zip code" So good, man! Really enjoying TheCarPassionChannel!
+SLarson Yet again, 3000GT's are almost non-existent too compared to Miatas, unfortunately. I have a 93' 300ZX and the community is a fraction of the size as well. Cool cars though!
+TheCarPassionChannel The number isn't really relevant. I meant that I wish there was someone like you that would dedicate a channel on youtube to supplying information to the other owners. There is one guy but he is just starting. I hope he will be at the same level as these videos one day.
SLarson Yeah I just meant since there are far less of the cars, there are far fewer people that are looking for the same information, so less demand for someone to put in a lot of time making videos. Not that it should stop anyone though.
I am on the way building my 1.8 engine to prepare for future turbo. I like your video and always check if you upgrade anything every morning, lol. keep going! You explain everything briefly that I cannot figure in forums.
+董文博 I know that forum life man, takes forever to figure things out sometimes, when they're so easily learned in a 2 minute conversation. That's what I'm here for!
Great analogy with the water hose feeding tomato garden. The best teachers can explain using language us students can relate to and understand. Same goes for sports and anything that is more difficult to understand intuitively. I am watching to decide upgrades to a newly purchased ‘04 Mazdaspeed that I will have my friendly mechanic install, but may want to wrench some myself because of your inspiration. Thank you sensei!
To anyone having difficulty getting the rail out: I ended up just pulling the fuel pressure regulator off, made getting the rail in and out a lot easier. It's just two (9mm?) bolts and a little pulling. Be warned, fuel is gonna spill out of it
Can I just take a moment to say thank you for your channel and your broke and boosted series. You make very nice quality videos and take the time to lay out everything to consider when turboing our miatas. Most of the stuff is already stuff I know and have done on my own cars, but I constantly get asked by other people just starting out. In a sense I get a very miataturbo attitude sometimes and don't want to be bothered helping some folks who can't comprehend how to use google or search before they ask silly questions. But thanks to your channel I now have a place I can refer them too that is a video and their ADD personalities can sit and watch it and buffer out a lot of their newb questions. So again, thank you. I've been following your channel for a bit now, if you're ever in the Chicago area hit me up and I'll let you tool around in one of my turbo track cars.
+Phil Miecznikowski Hahaha awesome, thanks. I'm just trying to create a resource that's helpful like a forum, but in a completely different layout. It really is frustrating sometimes to find simple answers, and a 5 minute conversation can answer dozens of questions that can take weeks of research to halfway firgure out with Google and forum searches. I'm not smarter or a better mechanic than any of the 'experts' on miataturbo, and my car is just a cookie-cutter build for the most part, I just like taking topics that I've learned and find interesting and turning them into formatted and comprehensive videos. Some people even like them!
Love your videos! Been watching them all for 3 days, thought me a lot! One things I'm confused about and can't find a video for is: you talk a lot about vacuum lines, but what is the purpose of the vacuum and vacuum lines across the entire car? A video about that would be awesome. Thanks again
Hi Chris, another great video. I'd be interested in a video of basic road tuning, I think you may have mentioned this yourself in a previous vid. Keep it up man!
I’m sure this has probably been mentioned , and I can see what you did it your way to explain the fuel system but just a little tip , you don’t need to take any of that stuff off to change the injectors, just the 2 12mm bolts, release the rail , and you can squeeze the injectors out 👍🏻
love the videos man.. just totaled my TL and im leaning towards buying a miata and boosting it because of you. (and haggardgarage of course lol). I have a suggestion for a new video that i think would really help a lot of turbo noobs like myself. ive always been confused about all the little things you can get for a turbo . such as, blow off valves, oil catch cans, etc.. i noticed in your how to turbo a miata video that you dont say anything about bov's or other "turbo accessories" like that.. i think it would be a great video to explain what these things are and why or why they are not necesarry.. Just my 2cents... -Alek
+Alek Villa That's a good idea, and that's what I've been trying to do with my recent videos especially is try to include explanations of parts along with the installs. I might do some kind of turbo system parts overview/explanation video at some point.
Greg, I got all this, and get the numbers in just fine. The problem comes when I then do some data logging and attempt to move the new VE table values over to the Megasquirt. The VE table values go, but my fuel number always reverts back to the stock 12.5. If I change it and then save it, everything is fine until I try to update my VE table values again. Is this just something I have to live with, or is there a setting I haven't clicked to make the tune remember my fuel value from update to update. If it helps, I'm running the MSPNP2.
man loving the vids . sold my zx shell for a miata and will be following some of your tutorials to get it ready for boost . thanks for all the effort you put into your videos and keep up the awesome work . ever hear of a road called the tail of the dragon ? U.S.129 ? or the Snake ? U.S. 429 ?
+TheCarPassionChannel I live 10 min from the road and my friends and I organize meets and cruises up there . if you ever get the chance to run the road hmu
+TheCarPassionChannel let us know if you ever plan to hit the dragon! i live not to far as well :) i have not taken m Miata yet, But i took my old 347 stroker foxbody 3 times...Man it was a blast, And loads of chill people to meet too.
Hey! I saw your update on snapchat earlier and it looks like you're getting intercooler/piping mocked up. I know this is probably going to be a video all on its own, and if it is could you briefly go over different types of blow off valves and HOW to mount them? I am guessing you got a kit from eBay and I plan on doing the same.. I just can't justify buying until I know I'm buying the right stuff (for cheap!). All the flanges and adapters make it a little confusing to someone who's never seen them before. Thanks and keep up the progress!
+John Mclaughlin Yeah I'm gonna include some info in the video about BOV's and IC's/Piping etc. I've been trying to add more info into the videos as I do the installs.
Hi, I bought a 1997 Miata STO for my wife, the previous owner had an issue with the car getting hot so he took it to Mazda and had a new head, head gasket, timing belt, water pump, thermostat and radiator installed. Then him and his wife split up so i got the car for a great price. I noticed it ran well, idled nice and did pretty good under most circumstances. The problem i have is when you get on the throttle and starting rolling up thru the RPM's...it has spots of hesitation in the power band...the wife doesnt notice it but i do...its not necessarily "jerky" but it has spots of hesitation. I replaced the fuel filter, plugs, wires and coil packs...also cleaned the throttle body , MAF and EGR valve but its still there. The only thing left is to replace the injectors, fuel reg' and possibly the fuel pump (and maybe the factory cat and downstream O2 senosor.... do you have any thoughts or ideas on this?
+Mr T Sounds like you've got the main things covered, if the hesitation is at full throttle it's most likely not the O2 sensor since it's only used at cruise and idle. Fuel pumps typically work fine, then just die. You may want to start with a fuel filter, and also check the ignition advance. Base timing should be at 10 degrees.
I already did the fuel filter as mentioned in the original post and the previous owner said the timing was done less than 90 days ago. I'm kinda lost here. The problem Isn't at wide open throttle, its just when you're running up thru the RPM's more aggressively than just normal driving (But not floored).
Hey, great channel! You forced me to start boost my mx5 nc turbo.... Any tips for this model? Am really excited to start it but I don't know plenty thinks about this model...
Yes, I have wideband sensor that reads 7.4 at idle and the low end, reads 21.1 above 3k. Despite the O2 reading's my Miata drives pretty good. Much better than the stock ones.
Hey so I'm having trouble ATM I'm using rx8 yellow body injectors and my car idles at 8.5 afr but for some reason no matter what I do it doesn't burn to the ecu?? So any changes I make doesn't effect my car what so ever.
This is an old video, but should it be fine to put referbished rx8 injectors on my stock 1.6, with stock ECU, so when i get to putting my turbo in later on, my car is already ready?
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Did you have a video covering the pros and cons (if any) of batch fire vs sequential fire? Or does the MX-5 even batch fire to begin with?
+Porsche Duésnburg The 1.6 has batch fuel. With sequential, you're firing the fuel right into the open port on each cycle, where with batch, half the time the fuel charge sits on the intake valve waiting to open. Sequential is just more efficient (and modern..)
Hi, Big Fan of your show, here. My only question is, what injectors size is recommended for a 1.6 Miata boosted to 5-7 psi? I swap my stock injectors to the 1.8's injectors.
+boaz ovilma Do you have a wideband? 1.8 injectors should be okay if you have raised fuel pressure, I'm not sure if they'll be enough if you're at stock pressure. A wideband will tell you if your AFR's are safe.
Hi greg, love your videos, love your channel and your miatas!!! I want to ask you a few questions on injectors. If i remember well you said in the broke & boosted intro or in another of your first video that is better to install some of your components and let the car run smootly BUT in case of injectors, you said in this video that there isn't necessary to install injectors with more flow if the car is stock and it doesn't need them or if the ecu can't manage all that fuel/mixture flow, right? So isn't it a paradox? Ps. I also want to ask you a question about the video you posted on snapchat or instagram ( ? Can't remember correctly) where you where passing through yout favorite tunnel, and before enter in it you've switched some buttons... I was wondering if they actually works as switchers to differents ecu maps and if it is possible to do something like this maybe setting one easy map for cruising daily and another aggressive map to have fun. Pps. Sorry 4 bad english im italian
+ste sprea It can be very confusing I know! Basically, if you need more fuel, you have two choices. You can install bigger injectors or add more fuel pressure to the stock injectors. I think the video you're talking about is the "How to Turbo Your Miata" where I say you should add bigger injectors and get the car running smoothly before you add the turbo. You can ONLY add the bigger injectors if you have an upgraded ECU that knows how to control them. On the Broke & Boosted project, I'm going to be keeping the stock ECU, so I can't upgrade the injectors. I have to add more fuel pressure. Also I did say you don't need bigger injectors if you don't need them, but if you're going to turbo the car in the future, you can install the injectors first even if you don't have the turbo yet. What I was saying is that if you have a stock engine, and you add bigger injectors, you're not going to gain any power just by adding the injectors. The switches are for high and low boost, and to turn the 2-step on and off. Hopefully all that makes sense!
ste sprea The boost control switch is just turning the EBC on and off. The 2-step control just interrupts the signal to the clutch switch. So technically neither are features of MS, but you can add switches to do things like map switching.
So with stock injectors/pump/ecu, I should just up my fuel pressure? I have just a cai and exhaust.Currently upgrading my car. Slowly changing gaskets and cleaning it out. Wanted to change to 450cc injectors but it sounds like it’s too much??
Great videos. I just got me a 90 miata. Quick question do you working on other peoples cars? Seems your very detail on these miatas and frankly i dont trust any mechanic working on my car. I had my tech guy for my M3s. But this is totally different.
What could happen if you forget to put in or lose one of the plastic spacers for the bolts on the fuel rail? My 1.8 has three bolts holding it in place and the middle one is missing the spacer.
+achikennugget38 It's possible you could have a fuel leak or a vacuum leak if the rail isn't secured properly, but those spacers are probably $2 so it's a good idea to get one back in there.
+De Rogie boy You could probably do an air valve delete on the stock ECU, but cold starts might be much harder. I'd recommend making a block plate, installing it but leaving the air valve off to the side, and start it up with the engine cold to see how it does.
on your other video you said you had 1.8 tan injectors some people say they work and some say it idles rough do you think you can install them to show exactly how it runs on stock ecu
Hey just got my fm kit, in instructions it tells me to remove the relay under the dash near the steering column to relieve the fuel pressure but I can't find the relay. Should I just use your method instead? Thanks
@TheCarPassionChanne - When deciding to upgrade your injectors. Is it better to wait until the turbo is strapped on to bump up to 460cc? I am going to install my MS2pnp here soon and was wondering if there is any downside to slowly start upgrading my fuel system starting with 190LPH pump, then new regulator then new injectors if I stay NA for a bite. Eventually I'll put that Gt2554R but wanted to know if its bad to have all the other stuff upgraded so much while staying NA for a bit. Thanks for you help
+Troy Sebo There is absolutely no downside to upgrading the injectors beforehand. In fact, I highly recommend it! That way you can get it running smooth n/a on the big injectors before going turbo. I have a buddy that ran his stock 1.8L on megasquirt with 1000cc injectors before he went turbo.
one question. Can I run RX8 injector (550cc) with stock engine and MS3X? Is that too much for stock engine or can I control it by MS3X? I want to install as many as I can for upgrade when the engine is out so I don't have to take them apart again when the turbo is ready. thank you.
+董文博 You can run 1000cc on the stock engine if you want, it's all in the tune. My friend ran 1000cc on his stock 1.8L and the drivability and fuel mileage was just like stock.
hey what injectors do you use and how much did you pay for them? i have seen a lot of options but im honestly not sure. i am looking to get around 230 whp. also should i upgrade my fuel pump if im trying to push that much hp?
+jonathan alipio The stock pump can handle that, it's never a bad idea to replace it if it's old. I use Five-O Black Ops 750cc injectors but you need a lot more injector for E85. I started with refurbished yellow RX8's from eBay, they were $170 and I did around 220-230whp on 91 octane with them. Those are also plug and play. (You still need standalone ECU, but they fit into the stock rail and use the stock harness plugs.)
Great video as always but... forgive me for asking but: so I can upgrade just injectors for basic not modified miata no need to upgrade fuel regulator and fuel pump ? if i just upgrade injectors is it give me any extra power ?
+ToFast2beSlow Installing bigger injectors alone will not give you any extra power. They are a "supporting modification" which means you only need to upgrade them when your current units can't provide enough fuel.
I'm not sure if I got it right...let's say I want to run around 300hp and I upgrade my fuel injectors to 450cc and my fuel pump to 320L/min. Also I have a standalone ECU. Do I need to buy an adjustable FPR to raise up the fuel pressure (equally to the boost) or is the ECU able to handle that?
I have a problem with my miata. when the car is running and i stop at an intention the tpms drop to the point where it almost turns off and then goes back to normal. everybody tells me its easy to fix but idk how to fix or whats wrong with it
I have a question. Is the stroker upgrade from flying miata worth it? It's a 1.8 to 2.0 conversion. can you also explain it and what it does power wise and if it would create more power and how much more power? please and thanks you
+Ryan Howell I have no experience with that kit so I can't really tell you much about it! If you're really interested in the kit I would shoot Flyin' an email.
+Acico73 You only need to upgrade your injectors if your current ones can't supply enough fuel. Injectors are really a "supporting mod" not something you upgrade to gain power.
Papa miata , I need to know what the 2 hoses coming off the fuel rail are called, I had to cut mine off to remove my intake and I don't know the name of the 2 hoses to replace them
Hey Greg I know this is an old video hopefully you can see my comment out of all the ones you get all of the time but I have a '90 Miata and I noticed that my idle wasn't stable and it would be rough when cold and I would compare it to a cammed muscle car also on top of that my car had no power till 3k or so RPM and when it hit that the car would instantly pull. I can compare the feeling to a boosted car with turbo lag if that makes any sense. I looked up on the forums and found that it is the injector insulator. So I would need to replace the faulty injector right? I figure I might as well just upgrade all the injectors since I have to replace them any how. I don't know what injectors to use or what all I will need after changing my injectors. Will I need an aftermarket ECU if I get bigger injectors? I hope you get my question because I don't want my car to stay sitting for long. Thanks!
Tyler Gittere I wouldn't guarantee the diagnosis from a forum; but if you need to replace the injectors and you want larger ones you will need a standalone ECU. If your car is n/a there's no benefit to going with a larger injector though.
Ok thanks I really appreciate it. I guess I'll save the injectors for when its time to boost the rice bucket. Means a lot when someone you subbed to will respond
Awesome! Maybe you can shed some light if an injector is bad or plugged. My mileage recently became pretty bad and no other changes. My compression is good (per your video), just changed my fuel filter, plugs and wires, and no trouble codes ('96 with ODB1, yes ODB1) as well as the engine runs smooth. Could an injectors be clogged? Can you check this with the injectors in the engine, how could you check if you pulled the injectors? Any insight is appreciated. Keep up the good work!
Finally figured it out. My car is an early 96-- thought it was a carry over OBD1 but finally found that it did have an OBD2 connector (which was sort of haphazardly put on by the factory and super hard to see). Anyway, I connected my OBD2 WiFi dongle on, opened up DashCmd on my iPhone and get 28MPG Ave but only 20 in the city with non aggressive driving. This seems a little thirsty but reasonable- may change the O2 sensor and clean up the IAC and MAF. Compression is good but think my seals are leaking. Thanks for following up and the good work. (BTW- I'd love to see a vid on diagnosing and replacing issues with the head on the Miata, if you are looking for suggestions)
+Troy Sebo I've never personally had one go out, but again if it's really high miles, and especially if you're boosted, it's just good maintenance to replace it. I also replace the fuel filter every year.
JosephCJ13 Nope, unless you're maxing out the current injectors, bigger injectors won't help. Power is determined by how much air you can get into the engine, the injectors are just there to maintain the correct air/fuel ratio. You won't be maxing out the stock injectors without a turbo, supercharger, or nitrous.
im ordering everything for my build im looking for a set of drop in plug and play injectors that can handle 350whp . and suggestions would be much appreciated
+Justin Hart What fuel? A set of 1000cc injectors will cover you for sure. There aren't any that are plug and play but if you know how to build a 350whp Miata motor I'm sure you can handle soldering a few connectors!
The Miata engine is 1598cc but that box is only used to estimate the new Req Fuel value, to my knowledge it's not used for any actual tuning. Required Fuel is what has a drastic effect on the tune
Anything i should keep in mind when i do that or do you have a video of yourself working on it so i can go into it with an idea of what im doing...? (Obvious noob face)
Young Veezer Mark all your connections with masking take/marker so you remember where they go, just try to stay as organized as possible. Take pictures, etc. And don't drop anything into the open manifold haha.
What about better fuel filters? Like better flow & even smaller contaminates filtered out? If possible? I don't know what the MX5's fuel filter is like, but I'm asking incase any knows the answer. And all this can help anyone improving the hardware & software of the fuel system, of something other then an MX5.
+RoyalSilver&Gold I've never heard of anyone using an upgraded fuel filter, people have done like 500whp with the stock one, it's not much of a restriction.
+TheCarPassionChannel I was worried about that. I'm just thinking of every way, to make an engine as strong & efficient as possible. As with the fuel system, I was thinking about a better fuel filter & pump, but you said the pump may not need to be upgraded, and now, fuel filters may not be so restrictive. Next. If I remember correctly from automotive school, one of my instructors said, in drag racing, some people have their fuel lines, like spiraling into a bucket of ice water, before the engine, to make the fuel denser, like more fuel molecules through the injectors. I don't know how effective that would be. So at most, I will just protect the fuel lines from heat sources, by wrapping them in heat reflective tape, and in my case, the walls of my bike's fuel tank, that's facing the engine. Last, I still haven't confirmed if this is complete bullshit, but I remember videos about putting powerful magnets on the fuel line, to improve the fuel flow, like in the rail & out the injectors.
+31tunic Might do some kind of walk around/re-introduction video once I get the plans for it a little more solid. I've been scheming for sure. Planting Easter Eggs in my videos to see if people notice or are interested haha
I have a very important but few simple questions for you. Loved this video but can please reply so I can ask you a few easy questions. Thanks and looking forward to your response.
it was rx8 injectors you installed? whats your power goal with broke and boosted? do you run 750cc in your other car? :) from the guy with the silver rally miata with red mud flaps from snapchat ;)
+chevyjimmy Yeah I just did this to show the process of changing injectors, I'm leaving them stock in that car, I might upgrade them to 1.8L injectors because the ECU can still run those. Yeah I run 750cc in my other car, need some big boys for the E85 life.
Hi!!! Thanks for the video, it seems really easy but... what about the dead time, I spend some hours readin mturbo.net jason method, it does not seem difficult, but a video explaining how to make the plot with excel, and discovering the dead time will be really helpful. Pleaseee
If aftermarket performance injectors aren’t vehicle specific for my 1998 Buick Park Avenue (3800 series 2 N/A) and I want to build it for boost, what options do I have for getting more fuel to the engine? Edit: after further research I have found a fucking vehicle specific nitrous kit but no fucking injectors!?!?
TheCarPassionChannel I’m not sure 🤔 there is a supercharged model of the 98 Park ave so I might be able to find some bigger injectors from the supercharged model
TheCarPassionChannel the fuel pump was also a concern of mine but again I think the supercharged model has a bigger pump that I might be able to bolt on
"My tomato garden is in a different ZIP code now."
The relay being pulled at the beginning is the fuel injector fuse. It is recommended that the actual fuel pump relay be removed which is located above the accelerator in a strange plug usually yellow or green colored on later models.
Man I’ve had my Miata for 5 years now and your videos are still helping me in 2024. You are the goat greg.
not much compares to the excitement I get when I see the notification from TH-cam saying there's a new carpassionchannel video!
you guys in California are so lucky, cars are clean and rust free
+Felix cv but CARB tho... =/
+Felix cv hard to find good NA's though.. and that pop up light tax.. you can find NB with less miles cheaper than most NA's with over 120k miles
high mileage NAs go for as much as average NBs... its fucking crazy
+s here in Croatia you can find 10 miatas for sale if you are lucky, mostly NBs
I think my miata is more rust than car
Just wanted to say watching your videos expired me to get a Miata. Thank you man for making all these videos. It would make my job much easier to fix up my car once I get it. Your the best! Keep up the great work !
Great video Greg! As always good explained. I had to laugh when you explained the air/fuel ratio with your tomato garden, but it was a good idea to take this example. I think everyone understands now how it works. I always love when a new video from the CPC pops up! Great work👍👍
Man you have a GIFT for teaching. Your videos have been a blessing to me and everyone else
hahaha "I need to call up the water company to give me more fuel flow so I can water my tomatoes that are in a different zip code" So good, man! Really enjoying TheCarPassionChannel!
I wish there was a guy like you with the 3000GT/Stealth community. Informative videos are non-existent for us. Keep it up!
+SLarson Yet again, 3000GT's are almost non-existent too compared to Miatas, unfortunately. I have a 93' 300ZX and the community is a fraction of the size as well. Cool cars though!
+TheCarPassionChannel The number isn't really relevant. I meant that I wish there was someone like you that would dedicate a channel on youtube to supplying information to the other owners. There is one guy but he is just starting. I hope he will be at the same level as these videos one day.
SLarson Yeah I just meant since there are far less of the cars, there are far fewer people that are looking for the same information, so less demand for someone to put in a lot of time making videos. Not that it should stop anyone though.
+TheCarPassionChannel Ok I get what you're saying. :P
Thank you again - another fantastic Miata how-to! Love watching these and learning. You make it easy for a feeble brain like mine.
I am on the way building my 1.8 engine to prepare for future turbo. I like your video and always check if you upgrade anything every morning, lol. keep going! You explain everything briefly that I cannot figure in forums.
+董文博 I know that forum life man, takes forever to figure things out sometimes, when they're so easily learned in a 2 minute conversation. That's what I'm here for!
best miata channel for me by far! keep up the awesome work man!
Great analogy with the water hose feeding tomato garden. The best teachers can explain using language us students can relate to and understand. Same goes for sports and anything that is more difficult to understand intuitively. I am watching to decide upgrades to a newly purchased ‘04 Mazdaspeed that I will have my friendly mechanic install, but may want to wrench some myself because of your inspiration. Thank you sensei!
To anyone having difficulty getting the rail out: I ended up just pulling the fuel pressure regulator off, made getting the rail in and out a lot easier. It's just two (9mm?) bolts and a little pulling. Be warned, fuel is gonna spill out of it
Thanks for the videos Greg your seriously helping me on my turbo build
Can I just take a moment to say thank you for your channel and your broke and boosted series. You make very nice quality videos and take the time to lay out everything to consider when turboing our miatas. Most of the stuff is already stuff I know and have done on my own cars, but I constantly get asked by other people just starting out. In a sense I get a very miataturbo attitude sometimes and don't want to be bothered helping some folks who can't comprehend how to use google or search before they ask silly questions. But thanks to your channel I now have a place I can refer them too that is a video and their ADD personalities can sit and watch it and buffer out a lot of their newb questions. So again, thank you. I've been following your channel for a bit now, if you're ever in the Chicago area hit me up and I'll let you tool around in one of my turbo track cars.
+Phil Miecznikowski Hahaha awesome, thanks. I'm just trying to create a resource that's helpful like a forum, but in a completely different layout. It really is frustrating sometimes to find simple answers, and a 5 minute conversation can answer dozens of questions that can take weeks of research to halfway firgure out with Google and forum searches. I'm not smarter or a better mechanic than any of the 'experts' on miataturbo, and my car is just a cookie-cutter build for the most part, I just like taking topics that I've learned and find interesting and turning them into formatted and comprehensive videos. Some people even like them!
You've enlightened me.. The fuel system makes so much more sense now
Love your videos! Been watching them all for 3 days, thought me a lot! One things I'm confused about and can't find a video for is: you talk a lot about vacuum lines, but what is the purpose of the vacuum and vacuum lines across the entire car? A video about that would be awesome. Thanks again
Thanks for this. Can't wait to see more.
Thanks. I going to work on that and replace the wideband sensor. Plus can't wait for another episode of Broke&Boosted.
Great explanation buddy, very cool!
Thanks, man! love your channel!
Hi Chris, another great video.
I'd be interested in a video of basic road tuning, I think you may have mentioned this yourself in a previous vid.
Keep it up man!
Let me just go ahead and say, I'm a impressed with how humble you are. You are truly a gentleman and a scholar sir. Good day to you lol
Great video as always.
can't wait for the next Broke and Boosted Video!!!!! saw a teaser on snapchat recently
+Bruno Costa Murta It's coming!
Excellent video!
very affirmative video! bravo
pro tip, use vice grips for those clamps, just one squeeze and itll hold it down the whole time you wiggle it off the hose
Greg, Would love to see more videos diving into Tuner Studio.
I’m sure this has probably been mentioned , and I can see what you did it your way to explain the fuel system but just a little tip , you don’t need to take any of that stuff off to change the injectors, just the 2 12mm bolts, release the rail , and you can squeeze the injectors out 👍🏻
thankz man.. well explained...
Please do a video about how to install a fuel pump!
love the videos man.. just totaled my TL and im leaning towards buying a miata and boosting it because of you. (and haggardgarage of course lol). I have a suggestion for a new video that i think would really help a lot of turbo noobs like myself.
ive always been confused about all the little things you can get for a turbo . such as, blow off valves, oil catch cans, etc.. i noticed in your how to turbo a miata video that you dont say anything about bov's or other "turbo accessories" like that.. i think it would be a great video to explain what these things are and why or why they are not necesarry..
Just my 2cents...
-Alek
+Alek Villa That's a good idea, and that's what I've been trying to do with my recent videos especially is try to include explanations of parts along with the installs. I might do some kind of turbo system parts overview/explanation video at some point.
Awesome dude! I realized that you did talk a bit about bov's but not very in depth.
Looking forward to the new vids keep it up man
Alek Villa I'll be talking a little bit about BOV's in the next video :)
Greg, I got all this, and get the numbers in just fine. The problem comes when I then do some data logging and attempt to move the new VE table values over to the Megasquirt. The VE table values go, but my fuel number always reverts back to the stock 12.5. If I change it and then save it, everything is fine until I try to update my VE table values again. Is this just something I have to live with, or is there a setting I haven't clicked to make the tune remember my fuel value from update to update.
If it helps, I'm running the MSPNP2.
Can you do a how-to for going e-85 on a miata?
6:07
Especially that “stock ecu” ;P
man loving the vids . sold my zx shell for a miata and will be following some of your tutorials to get it ready for boost . thanks for all the effort you put into your videos and keep up the awesome work . ever hear of a road called the tail of the dragon ? U.S.129 ? or the Snake ? U.S. 429 ?
+Philip Kappesser I have heard of Tail of the Dragon, that road looks insanely fun!
+TheCarPassionChannel I live 10 min from the road and my friends and I organize meets and cruises up there . if you ever get the chance to run the road hmu
Philip Kappesser I definitely want to run that road in the Miata at some point over the next couple years.
+TheCarPassionChannel any time is a good time . longer you wait , the more of a chance I can get my new little miata ready to keep up . lol
+TheCarPassionChannel let us know if you ever plan to hit the dragon! i live not to far as well :) i have not taken m Miata yet, But i took my old 347 stroker foxbody 3 times...Man it was a blast, And loads of chill people to meet too.
Hey! I saw your update on snapchat earlier and it looks like you're getting intercooler/piping mocked up. I know this is probably going to be a video all on its own, and if it is could you briefly go over different types of blow off valves and HOW to mount them? I am guessing you got a kit from eBay and I plan on doing the same.. I just can't justify buying until I know I'm buying the right stuff (for cheap!). All the flanges and adapters make it a little confusing to someone who's never seen them before. Thanks and keep up the progress!
+John Mclaughlin Yeah I'm gonna include some info in the video about BOV's and IC's/Piping etc. I've been trying to add more info into the videos as I do the installs.
Hi,
I bought a 1997 Miata STO for my wife, the previous owner had an issue with the car getting hot so he took it to Mazda and had a new head, head gasket, timing belt, water pump, thermostat and radiator installed. Then him and his wife split up so i got the car for a great price. I noticed it ran well, idled nice and did pretty good under most circumstances. The problem i have is when you get on the throttle and starting rolling up thru the RPM's...it has spots of hesitation in the power band...the wife doesnt notice it but i do...its not necessarily "jerky" but it has spots of hesitation. I replaced the fuel filter, plugs, wires and coil packs...also cleaned the throttle body , MAF and EGR valve but its still there. The only thing left is to replace the injectors, fuel reg' and possibly the fuel pump (and maybe the factory cat and downstream O2 senosor.... do you have any thoughts or ideas on this?
+Mr T Sounds like you've got the main things covered, if the hesitation is at full throttle it's most likely not the O2 sensor since it's only used at cruise and idle. Fuel pumps typically work fine, then just die. You may want to start with a fuel filter, and also check the ignition advance. Base timing should be at 10 degrees.
I already did the fuel filter as mentioned in the original post and the previous owner said the timing was done less than 90 days ago. I'm kinda lost here. The problem Isn't at wide open throttle, its just when you're running up thru the RPM's more aggressively than just normal driving (But not floored).
Hey, great channel! You forced me to start boost my mx5 nc turbo.... Any tips for this model? Am really excited to start it but I don't know plenty thinks about this model...
Yes, I have wideband sensor that reads 7.4 at idle and the low end, reads 21.1 above 3k. Despite the O2 reading's my Miata drives pretty good. Much better than the stock ones.
+boaz ovilma Something might be wired wrong, or the sensor might be bad. At 21.1 the car won't even run, and it definitely won't idle at 7.4.
Funniest thing I’ve heard all day lol “ lets pretend I’m smart for a minute “
is it normal for your fuel relay to be very hard te get out?
in my miata it just doesn't want to come out.
Hey so I'm having trouble ATM I'm using rx8 yellow body injectors and my car idles at 8.5 afr but for some reason no matter what I do it doesn't burn to the ecu?? So any changes I make doesn't effect my car what so ever.
This is an old video, but should it be fine to put referbished rx8 injectors on my stock 1.6, with stock ECU, so when i get to putting my turbo in later on, my car is already ready?
Did you have a video covering the pros and cons (if any) of batch fire vs sequential fire? Or does the MX-5 even batch fire to begin with?
+Porsche Duésnburg The 1.6 has batch fuel. With sequential, you're firing the fuel right into the open port on each cycle, where with batch, half the time the fuel charge sits on the intake valve waiting to open. Sequential is just more efficient (and modern..)
whats that hose connecting to the fuel line, i cant seem to find any name or part online for it
How much boost warrants an injector replacement? How many psi is fine with stock injectors
could you install or explain what a pcv breather relay does?
Does this video work for a nb2 if I am putting in id1050x injectors?
When you're gonna do a video on LS coils ? Man :)
Hi, Big Fan of your show, here. My only question is, what injectors size is recommended for a 1.6 Miata boosted to 5-7 psi? I swap my stock injectors to the 1.8's injectors.
+boaz ovilma Do you have a wideband? 1.8 injectors should be okay if you have raised fuel pressure, I'm not sure if they'll be enough if you're at stock pressure. A wideband will tell you if your AFR's are safe.
Hi greg, love your videos, love your channel and your miatas!!!
I want to ask you a few questions on injectors. If i remember well you said in the broke & boosted intro or in another of your first video that is better to install some of your components and let the car run smootly BUT in case of injectors, you said in this video that there isn't necessary to install injectors with more flow if the car is stock and it doesn't need them or if the ecu can't manage all that fuel/mixture flow, right? So isn't it a paradox?
Ps. I also want to ask you a question about the video you posted on snapchat or instagram ( ? Can't remember correctly) where you where passing through yout favorite tunnel, and before enter in it you've switched some buttons... I was wondering if they actually works as switchers to differents ecu maps and if it is possible to do something like this maybe setting one easy map for cruising daily and another aggressive map to have fun.
Pps. Sorry 4 bad english im italian
+ste sprea It can be very confusing I know! Basically, if you need more fuel, you have two choices. You can install bigger injectors or add more fuel pressure to the stock injectors. I think the video you're talking about is the "How to Turbo Your Miata" where I say you should add bigger injectors and get the car running smoothly before you add the turbo. You can ONLY add the bigger injectors if you have an upgraded ECU that knows how to control them. On the Broke & Boosted project, I'm going to be keeping the stock ECU, so I can't upgrade the injectors. I have to add more fuel pressure. Also I did say you don't need bigger injectors if you don't need them, but if you're going to turbo the car in the future, you can install the injectors first even if you don't have the turbo yet. What I was saying is that if you have a stock engine, and you add bigger injectors, you're not going to gain any power just by adding the injectors. The switches are for high and low boost, and to turn the 2-step on and off. Hopefully all that makes sense!
+TheCarPassionChannel thanks man, think i got it!
Ps. High/low boost switchers are a feature of megasquirt?
Can't wait for upcoming video ^^
ste sprea The boost control switch is just turning the EBC on and off. The 2-step control just interrupts the signal to the clutch switch. So technically neither are features of MS, but you can add switches to do things like map switching.
So with stock injectors/pump/ecu, I should just up my fuel pressure? I have just a cai and exhaust.Currently upgrading my car. Slowly changing gaskets and cleaning it out. Wanted to change to 450cc injectors but it sounds like it’s too much??
With only intake/exhaust, there's no need to modify the fuel system
is it possible to have megasquirt treat the pump as if it's smart? I.e pwm it?
when are u gonna remove the charcoal canister? and thanks for the informational videos!!!
+Dilaj Karunaratne I'm going to leave all smog equipment in place for this build.
Great videos. I just got me a 90 miata. Quick question do you working on other peoples cars? Seems your very detail on these miatas and frankly i dont trust any mechanic working on my car. I had my tech guy for my M3s. But this is totally different.
+The Vivas Family life Yeah I do occasionally, mostly for friends. Usually I don't have much extra time for it.
What could happen if you forget to put in or lose one of the plastic spacers for the bolts on the fuel rail? My 1.8 has three bolts holding it in place and the middle one is missing the spacer.
+achikennugget38 It's possible you could have a fuel leak or a vacuum leak if the rail isn't secured properly, but those spacers are probably $2 so it's a good idea to get one back in there.
Hey Greg, on your other car you blocked off the air valve. Do you have to run on megasquirt to do that ?
thanks
+De Rogie boy You could probably do an air valve delete on the stock ECU, but cold starts might be much harder. I'd recommend making a block plate, installing it but leaving the air valve off to the side, and start it up with the engine cold to see how it does.
Can we have a vid showing the wiring for sequential injection
Budget ECU content soon for broke and boosted!? ;D
on your other video you said you had 1.8 tan injectors some people say they work and some say it idles rough do you think you can install them to show exactly how it runs on stock ecu
I might put the 1.8 injectors in, not sure yet. The stock ECU should be able to idle 1.8 injectors just fine though.
Hey just got my fm kit, in instructions it tells me to remove the relay under the dash near the steering column to relieve the fuel pressure but I can't find the relay. Should I just use your method instead? Thanks
Pulling the black relay under the hood and cranking the car for a couple seconds will relieve the fuel pressure, and also remove your gas cap.
@TheCarPassionChanne - When deciding to upgrade your injectors. Is it better to wait until the turbo is strapped on to bump up to 460cc? I am going to install my MS2pnp here soon and was wondering if there is any downside to slowly start upgrading my fuel system starting with 190LPH pump, then new regulator then new injectors if I stay NA for a bite. Eventually I'll put that Gt2554R but wanted to know if its bad to have all the other stuff upgraded so much while staying NA for a bit. Thanks for you help
+Troy Sebo There is absolutely no downside to upgrading the injectors beforehand. In fact, I highly recommend it! That way you can get it running smooth n/a on the big injectors before going turbo. I have a buddy that ran his stock 1.8L on megasquirt with 1000cc injectors before he went turbo.
+TheCarPassionChannel Are you the RX-8 injectors on the fast miata?
Troy Sebo I used to, but they're not near big enough for my power level with E85. Running 750cc now.
one question. Can I run RX8 injector (550cc) with stock engine and MS3X? Is that too much for stock engine or can I control it by MS3X? I want to install as many as I can for upgrade when the engine is out so I don't have to take them apart again when the turbo is ready. thank you.
+董文博 You can run 1000cc on the stock engine if you want, it's all in the tune. My friend ran 1000cc on his stock 1.8L and the drivability and fuel mileage was just like stock.
10:38 nice resqme ;)
hey man can you make a vid how to record your AFR with a wideband o2 and what components are needed to do so. thanks
+Luis Nunez agreed I would like to see a video on this
+Luis Nunez You either need a datalogger (which is also available from Innovate) or you can do it through a standalone ECU like Megasquirt.
+TheCarPassionChannel Hey man, just wanted to say thanks for all these informative vids. Hope you start getting more views.
hey what injectors do you use and how much did you pay for them? i have seen a lot of options but im honestly not sure. i am looking to get around 230 whp. also should i upgrade my fuel pump if im trying to push that much hp?
+jonathan alipio The stock pump can handle that, it's never a bad idea to replace it if it's old. I use Five-O Black Ops 750cc injectors but you need a lot more injector for E85. I started with refurbished yellow RX8's from eBay, they were $170 and I did around 220-230whp on 91 octane with them. Those are also plug and play. (You still need standalone ECU, but they fit into the stock rail and use the stock harness plugs.)
Great video as always but... forgive me for asking but: so I can upgrade just injectors for basic not modified miata no need to upgrade fuel regulator and fuel pump ? if i just upgrade injectors is it give me any extra power ?
+ToFast2beSlow Installing bigger injectors alone will not give you any extra power. They are a "supporting modification" which means you only need to upgrade them when your current units can't provide enough fuel.
+TheCarPassionChannel great thank u... need to do turbo then :)
I'm not sure if I got it right...let's say I want to run around 300hp and I upgrade my fuel injectors to 450cc and my fuel pump to 320L/min. Also I have a standalone ECU. Do I need to buy an adjustable FPR to raise up the fuel pressure (equally to the boost) or is the ECU able to handle that?
Jan 94 if the injectors are the correct size and the pump can maintain pressure then you don't need to raise the pressure with an adjustable FPR
Thanks for the quick answer, you're the best :)
What make of injectors did you show
I have a problem with my miata. when the car is running and i stop at an intention the tpms drop to the point where it almost turns off and then goes back to normal. everybody tells me its easy to fix but idk how to fix or whats wrong with it
+Johnny Quinones Could be AFM, o2 sensor, clean the IACV, check for vacuum leaks. Just a few things to check.
I have a question. Is the stroker upgrade from flying miata worth it? It's a 1.8 to 2.0 conversion. can you also explain it and what it does power wise and if it would create more power and how much more power? please and thanks you
yeah, I'm also interested, if someone has info it would be apretiated! :)
+Ryan Howell I have no experience with that kit so I can't really tell you much about it! If you're really interested in the kit I would shoot Flyin' an email.
Ok will do. Thanks for your time man!:)
So is it only worth upgrading injectors if I'm running force induction?
What if I don't? Is it just not worth upgrading them?
+Acico73 You only need to upgrade your injectors if your current ones can't supply enough fuel. Injectors are really a "supporting mod" not something you upgrade to gain power.
Does anyone know the dead time on stock 1.6 injectors? Or even better, the voltage response curve?
If I got 440cc injectors would I need to tune them for them to be at 440cc or would they automatically be run at 440cc
Huh??
Papa miata , I need to know what the 2 hoses coming off the fuel rail are called, I had to cut mine off to remove my intake and I don't know the name of the 2 hoses to replace them
You can get generic fuel hose at AutoZone and they'll cut it to length. Just make sure it's efi/high pressure fuel hose.
I am guessing Megasquirt does not work with a Mac. What is a minimal laptop would you need?
Hey Greg I know this is an old video hopefully you can see my comment out of all the ones you get all of the time but I have a '90 Miata and I noticed that my idle wasn't stable and it would be rough when cold and I would compare it to a cammed muscle car also on top of that my car had no power till 3k or so RPM and when it hit that the car would instantly pull. I can compare the feeling to a boosted car with turbo lag if that makes any sense. I looked up on the forums and found that it is the injector insulator. So I would need to replace the faulty injector right? I figure I might as well just upgrade all the injectors since I have to replace them any how. I don't know what injectors to use or what all I will need after changing my injectors. Will I need an aftermarket ECU if I get bigger injectors? I hope you get my question because I don't want my car to stay sitting for long. Thanks!
Tyler Gittere I wouldn't guarantee the diagnosis from a forum; but if you need to replace the injectors and you want larger ones you will need a standalone ECU. If your car is n/a there's no benefit to going with a larger injector though.
Ok thanks I really appreciate it. I guess I'll save the injectors for when its time to boost the rice bucket. Means a lot when someone you subbed to will respond
Awesome! Maybe you can shed some light if an injector is bad or plugged. My mileage recently became pretty bad and no other changes. My compression is good (per your video), just changed my fuel filter, plugs and wires, and no trouble codes ('96 with ODB1, yes ODB1) as well as the engine runs smooth. Could an injectors be clogged? Can you check this with the injectors in the engine, how could you check if you pulled the injectors? Any insight is appreciated. Keep up the good work!
+Jo Ro Hmm, what did you calculate your MPG to be and what's your driving style?
Good question. I'm not too aggressive. But I did not calculate it, yet. Let me run a few tank fulls and be more rigorous.
Finally figured it out. My car is an early 96-- thought it was a carry over OBD1 but finally found that it did have an OBD2 connector (which was sort of haphazardly put on by the factory and super hard to see). Anyway, I connected my OBD2 WiFi dongle on, opened up DashCmd on my iPhone and get 28MPG Ave but only 20 in the city with non aggressive driving. This seems a little thirsty but reasonable- may change the O2 sensor and clean up the IAC and MAF. Compression is good but think my seals are leaking. Thanks for following up and the good work. (BTW- I'd love to see a vid on diagnosing and replacing issues with the head on the Miata, if you are looking for suggestions)
Jo Ro Head swap video coming soon!
Thanks. As a follow up, the brochure specs on '96 1.8L stock MPG is 21/26 on Edmunds.com Car still is on the money. No reply necessary.
You said once nearing 200K it would be wise to replace the FP, what about the regulator? Do those ever go out?
+Troy Sebo I've never personally had one go out, but again if it's really high miles, and especially if you're boosted, it's just good maintenance to replace it. I also replace the fuel filter every year.
I have a 1.6 Miata and I'm getting a cold air intake for it and I was wondering if I should bigger fuel Injectors with the intake and if so what size?
Nope, injectors won't make any difference. The stock AFM has a temp sensor in it that will make fuel adjustments if the air is any colder.
+TheCarPassionChannel okay thanks. Since the air intake brings in more air into the engine would getting bigger injectors make more hp?
JosephCJ13 Nope, unless you're maxing out the current injectors, bigger injectors won't help. Power is determined by how much air you can get into the engine, the injectors are just there to maintain the correct air/fuel ratio. You won't be maxing out the stock injectors without a turbo, supercharger, or nitrous.
+TheCarPassionChannel okay thank you for your help. I'm trying to make more power in my Miata but not spend a bunch of money.
video on C.O.P.S. installation. with & without M.S.
+dumbestoyster I've been wanting to do that for sure.
Do I need to re tune it if I change my injectors and fuel pump
Yes
im ordering everything for my build im looking for a set of drop in plug and play injectors that can handle 350whp . and suggestions would be much appreciated
+Justin Hart What fuel? A set of 1000cc injectors will cover you for sure. There aren't any that are plug and play but if you know how to build a 350whp Miata motor I'm sure you can handle soldering a few connectors!
+TheCarPassionChannel ok thanks man much appreciated
Isn't a 1.6l displacement in cc a 1606cc. Is this setting important? Engine displacement
The Miata engine is 1598cc but that box is only used to estimate the new Req Fuel value, to my knowledge it's not used for any actual tuning. Required Fuel is what has a drastic effect on the tune
How much power does the stock clutch handle for a 93 Miata?
+Aidan Morris They usually start to slip around 140-150wtq or so
I have an nb, so do i have to remove the whole air intake in order to get to the fuel injectors?
Young Veezer I believe you can remove just the top half of the intake manifold.
Anything i should keep in mind when i do that or do you have a video of yourself working on it so i can go into it with an idea of what im doing...? (Obvious noob face)
Young Veezer Mark all your connections with masking take/marker so you remember where they go, just try to stay as organized as possible. Take pictures, etc. And don't drop anything into the open manifold haha.
Okay. Hopefully that and an oil change and ill have my miata on the streets!! Thanks for your help Greg!!
What about better fuel filters? Like better flow & even smaller contaminates filtered out? If possible? I don't know what the MX5's fuel filter is like, but I'm asking incase any knows the answer. And all this can help anyone improving the hardware & software of the fuel system, of something other then an MX5.
+RoyalSilver&Gold I've never heard of anyone using an upgraded fuel filter, people have done like 500whp with the stock one, it's not much of a restriction.
+TheCarPassionChannel I was worried about that. I'm just thinking of every way, to make an engine as strong & efficient as possible. As with the fuel system, I was thinking about a better fuel filter & pump, but you said the pump may not need to be upgraded, and now, fuel filters may not be so restrictive.
Next. If I remember correctly from automotive school, one of my instructors said, in drag racing, some people have their fuel lines, like spiraling into a bucket of ice water, before the engine, to make the fuel denser, like more fuel molecules through the injectors. I don't know how effective that would be. So at most, I will just protect the fuel lines from heat sources, by wrapping them in heat reflective tape, and in my case, the walls of my bike's fuel tank, that's facing the engine. Last, I still haven't confirmed if this is complete bullshit, but I remember videos about putting powerful magnets on the fuel line, to improve the fuel flow, like in the rail & out the injectors.
when will the slicktop make an appearance lol
+31tunic Might do some kind of walk around/re-introduction video once I get the plans for it a little more solid. I've been scheming for sure. Planting Easter Eggs in my videos to see if people notice or are interested haha
I have a very important but few simple questions for you. Loved this video but can please reply so I can ask you a few easy questions. Thanks and looking forward to your response.
it was rx8 injectors you installed? whats your power goal with broke and boosted? do you run 750cc in your other car? :)
from the guy with the silver rally miata with red mud flaps from snapchat ;)
I think he kept the stock injectors.
+Sam Williams not on his turbo build. On broke and boosted he hasn't changed them yet.
+chevyjimmy Yeah I just did this to show the process of changing injectors, I'm leaving them stock in that car, I might upgrade them to 1.8L injectors because the ECU can still run those. Yeah I run 750cc in my other car, need some big boys for the E85 life.
What about upgrading the injectors (450cc) with a stock ECU
Erik McIlhenney You can't, you need to have a standalone or some sort of piggyback. The stock ECU can probably do around 320cc max
TheCarPassionChannel
thanks
"tomato garden" yeah, sure. we all know you mean weed bro
Hi!!! Thanks for the video, it seems really easy but... what about the dead time, I spend some hours readin mturbo.net jason method, it does not seem difficult, but a video explaining how to make the plot with excel, and discovering the dead time will be really helpful. Pleaseee
pls tell me 300zx key is a sign you are 300zxing again
+Ericbuyslunch Congrats, you've spotted this video's Z32 Easter Egg.
no start working on your z!
If aftermarket performance injectors aren’t vehicle specific for my 1998 Buick Park Avenue (3800 series 2 N/A) and I want to build it for boost, what options do I have for getting more fuel to the engine?
Edit: after further research I have found a fucking vehicle specific nitrous kit but no fucking injectors!?!?
They don't take the same injectors as the Buick Grand National? (The 3.8L twin turbo?)
TheCarPassionChannel I’m not sure 🤔 there is a supercharged model of the 98 Park ave so I might be able to find some bigger injectors from the supercharged model
TheCarPassionChannel the fuel pump was also a concern of mine but again I think the supercharged model has a bigger pump that I might be able to bolt on
@11:39 #420blazeitconfirmed