Really enjoy your vids man and how you're using science and testing to prove out your results, much like another of my favorites: David Vizard. The idea of using the intake piping as a plenum that then stacks up pressure before the TB is so far from the way folks commonly do things and the results are just as pleasing. LOVE seeing people push the envelope of what can be done, especially when that means totally ignoring what all the "in the know" cats are up to ;>) Keep up the great work and all the best to you from all the way down in NE Texas :>)
@@SRDmotorsports , dude, I was so jacked about this idea I spent a cuppla hours scourin the ol www this afternoon lookin for some type of application that might have a similarly shaped bit of tubing, ducting, pipe or anything I could use to adapt to make an intake pipe from. No luck yet but I did think about takin a length of 6" ABS tubing to make a similarly shaped section, then use that as a mold for making one outta fiberglass. Any better suggestions on what I could use?
And like a total dweeb, here I am replying to myself but, an idea just hit me! Maybe I could locate an expansion chamber off an old 2 stroke bike. They're usually curved and expanded similarly to your tubing section! Time to hit the motorcycle junk yard!
@@kimsteele9882 that 2 stroke chamber is a money maker! I mean if u find a similar sized one that’s usable for us that’s gold! if you are handy with fiberglass (can learn quick) it might be easier to find “molds” to make some… Or in another case u can just make a shape out of diff plastic sheets or shape and duct tape the heck out of it and that “becomes” your mold 😂 that’s what I did using cardboard (easier to shape and maintain curvature)
I personally found that polishing and smoothing the inside of the intake manifold with sandpaper and a lot of time gives me massive torque differences, It's almost like a whole different engine. There is so much air friction inside the factory system that we underestimate. 💯 Thank you for the video. It was very informative.
thanks man! I see you enjoy "thinking" too hence on this video there are alot of moments heck i wont mind if my condenser is ducted well? more efficiency there is welcome especially cuz summer 🤣
@@spreadhysteria3650 well that is a good point i mean i do sometimes have that in my head too! BUT maybe we were once the kind of kid who always just had to open up their toy electric car just to "see" 🤣 but key thing is "their own" not others lol Im against those kinds of shops, the ones that promote new work to customers only cuz its something they found "new" or wanna "learn" about... at the customers expense 😒
Those 07K motors haul ass!! Lot of people don't realize that they detune if you run 87 octane, my coworker puts premium in his and it woke the hell up, bone stock with hammered engine mounts at 370k kms and he Mogs civic SIs all around town lol
whoa!!!!!!!! only a Few know the composition of the name!!! shocked 🤣 but yeah i agree its why my attempt is such... my SRDmotorsports shop will continue to operate as normal and we will continue to race but rather than have a channel like most? who just showcase "wow lodi wow solid" i figure id make it a lil different like the "tv" is more on info sharing and shop internal work updates since we all "marites" at one point we all wanna see how shops are going inside
If you look at porsche intake manifolds for turbos they use the same concept you explained but used it more for temperature control and it gave them much lower intake temps which got them like 12% better fuel economy and more power
excellent observation man! That’s so true I actually didn’t realize or notice that until you mentioned it and checked on it! and that actually does make sense this concept does actually indirectly (in my case or perception) affects temperature in a good way as the “expansion” is the opposite of “compressing” air and we know compressing air raises temperature and so the opposite does the favor the other way 😎
Very informative video. I love it that you are willing to challenge “conventional wisdom”, and put true thought into the modifications that you are testing with. Thanks for the mention!! I was not expecting that. 😂 I warn you to be careful talking about how great the F40 is with me, you might never get me to stop rambling on. 😂 😂 😂
yep they got that from Hondatech years prior and i was in hondatech since 2003 it was just the length that was working which is "helmholtz resonator" see all dynoes if on ram air extension the spike known as "aem hump" at 4-5k is there was called AEM hump due to the fact that AEM first introduced a CAI for us and it gave that resonance hence the design i made was to see if "what everyone uses" for the past 20yrs if it can get any better... pretty much the same for "heat exchangers" while some opt to go full rad when you can see the "feeding" of air is inadequate means there are tons of room of improvement condenser = epic colder a/c hmm
@@findtherightbeat yeah was gonna say til now its D15beta so when u search posts by username as the years go backwards on the second or third page its still current but all "replied" quotes are acid-burn lol
Informative vid. I want to improve a 2.5L Triumph PI sedan (saloon). They have a cylindrical 80mm plenum (metal sheet) with 6X 50mm velocity stacks welded inside, then a little curved rubber tube to feed each body of the twins inlets. According to your thread, I could change the position of the plenum to get straight velocity stacks (instead of the curved shapes) + increase the volume of plenum chamber and inlet (80mm to 100-110mm. Then create a solid 33 inch cold air intake to a filter box on the lower valence front car where there are 2 air vents. Still don't know how to calibrate the plenum and the filter/filter box . Actual filter box is metal cylindic box 14 diam x 12 length. Mabe reusable as an entry filter box with K&N and a velocity stack feeding pipe (aluminium or inox) to the main plenum.
Sounds like a cool engine… I think plenum wise our engine bays don’t have enough space for the optimum size So that means just the biggest you can make that’s safe without hitting other parts will be okay and just hope it isn’t too small hehe
But my video actually does different from what u said or thought… By doing what I did on this video to your Triumph ? It’s like putting a radiused entry or velocity stack to bleed ur 80mm plenum The goal is to fill the plenum
oh man! thank you its guys like you that help give reason to share cuz who knows which aspect of it would end up helping your project, any of it will be awesome!
@@mikodelacruz oh wow for real?! shop talks? nice! thats definitely nice to know cuz it means we naturally need more shops like that!!!! none of the "a simpe lng yan dalin mo madali lang yan" 🤣
oh definitely! when i get a chance it will be dyno tested on mine and a friend b20vtec so we have decent comparison... funny cuz some time ago i was thinking "maybe on a turbo we can see more whp for the same boost" 🤣
3:35 This is a common myth. The air going above the wing will accelerate because of the curve of the wing and therefore speed up and lose pressure but it won’t meet up with the wind it parted with but will actually arrive at the trailing edge faster than the air going below the aerofoil
Hello, Appreciate your adept explanation of the physics of the intake. My question is before the Divergent expansion before the throttle body are you maintaining the same size enter intake pipe diameter as your throttle body at the ventur
Thanks for the comment man… As of now? Yes same “entry” dia. And throttle body, why? I havnt studied it further to test different scenarios. But it is definitely something I am “actually” looking into
Can the Bernoulli effect be used on ITBs? What would be the effect of designing a throttle body that slides open horizontally from the bottom, simultaneously with the top of the trumpets?
really depends but the drag or restriction will always be a factor cuz if it wasn’t then we would have seen all ports have a Venturi it may have but it isn’t as most picture it It is why CSA matters , valve to port sizing and even Valve to port throat ratio etc -there’s always been a flat slide throttle ITB too
We all came up with the idea on onecamonly or D-Series . I designed and drawed this in cad to fit directly onto the TB.Glenniz helped with the production and also designed a polyester intake pipe.Great to see this again.These days i'm better at drawing and i use a 3d printer to create test pieces for my 2018 honda civic 1.5T.I recently used this for a new intake for my civic.What was your Nickname?
Yessssss thank you for that info! I used to pm glenniz ALOT back then on both OCO and series I think one more guy I havnt mentioned is Leshok too… my username in Dseries is sl@sh and in oco I believe rfbuilt or d15beta same in HT yep and props to all u guys definitely! And it oddly mirrored what Tom aka Tbone did in HT on his 2liter GSR when RLZ worked his head and flowed it = said it was the only one to ever get close to ITB style flow figures
@SRDmotorsports yes I remember those names !My Nick name is Hondanickx, I designed and drew the Throttle body adaptor, and Glenn even shipped it to me along with his intake pipe.I just watched the dyno video and the velocity stack video you made. 6whp gain is ⁰! Really love the content. I need to try this onto my 10thgen 1.5T civic too.
@@hondanickx def do remember ur forum name no doubt and actually when u guys did the TBRIA I was working on other stuff and I stumbled on it like when it was being done via frp which looked pretty cool too! and yeah reason I said test1 on the video title is I plan to keep testing it out when we have a dyno session as it’s an easy bolt on and just more data for us! Def worth a try again this time u can prolly improve it even better
Very informative video! I really liked it and already subscribed. But my question is. What about for turbo engines? Is there a positive effect if the filter end of the intake pipe is larger in diameter and as it goes to the turbo it becomes smaller? For reference HD momentum’s air intake kit for a fortuner. Thank you!
In essence YES granted it’s not tapered beyond ideal , meaning there can be too much taper that in increases drag/restriction at the expense of airspeed… that’s no bueno for turbo inlet
hi, i have some questions: at 3:46 the shape of that "tube" is the same as some intake on ebey (the filter is on the high pressure opening and the low pressure opening is toward the throttle), i was wondering isn't it better to do the opposite? like the one at 4:33?
3:46 so , usually u see intake tubes shaped like that on Civic and other cars . So they got higher velocity and less air pressure entering manifold? Is there some trade off with air temperatures when you "pressurized" intake like this . Maybe im jusy dumb but whould be quiet interesting to see differences in air density
true, good catch on “air density” just not sure how we can precisely measure that real time But indeed since compressing air = increases temp and that’s constant …the other way is too
@@SRDmotorsports first , thanks for your reply. I didn't expect replies on 2 year old video 🤣🤣🤣 And second, I think only" out of box * solution whould be Banks gauge.i don't know if iDash or data monster,but I feel like second should be more suited for this . Last time I checked they got so much inputs just for air . From outside of cat to intake plenum. Only thing they don't support on Guage is lambda.
Well it was an interesting question 🤣 But hey! Thanks for mentioning those guages now il have to snoop around their offerings…more data gathering never hurt 😎
@@SRDmotorsports nah brother, same as you putting you wisdom and knowledge on internet for others to learn. Im too , trying when I can give some info for others. When we all share some part of knowledge, at the end we all get smarter from it ... I knew Mr banks from his work on diesel engines. And he too lot of educational videos on TH-cam. although his videos are more about turbos and performance turbo diesels his info still holds . Since it's all about efficiency. And thru some rabbit hole of Mazda L3 and L5 engines and throttle body "mod" I found that banks OBD2 stuff works on gasoline engines too . And with Mazda drive by wire throttle body. And then they use thous gauges in their dino room to gather date
This effect could be achieve by putting an oversized silicone hose connecting the intake pipe and TB? Like, 76-89mm silicone hose in a 68mm TB. And do you think a 70mm inlet diameter in a CAI is sufficient to feed a 68mm TB? Thank you very much
maybe but that doesn’t replicate a proper shaped velocity stack that’s just a reducer… 70mm is 2.75in dia. Most CAI is 3in so it should be fine but if it’s a true 2.75 it seems “okay” remember diameter is one of the two factors The CAI also has “length” over all SRI
@@SRDmotorsports it's a ebay CAI and it's supposed to be 3", but I measured last day and the real inner diameter was about 2,75" so I was a little disappointed and thinking in if I should replace it for something bigger. Problem is that is for a TSX/CL9 so options are very reduced and very expensive
thanks man! hopefully this video gives others more ideas on how they can tweak theirs... but also to show them that their lodi's prolly just listen to fb experts and that their own research may do them alot better ftw
Lxi manifold or vti 70mm is too big for a vti / esi / sohc manifold And also as u watched the video it doesn’t really say 70mm means more Power or better etc A lot of b18 and b16 I’ve build kargado nka 62mm ITR throttle lng And that’s coming from us a shop that Carries and sells 70mm Omni throttle btw so u can be sure no salestalk lol
It’s composite material made a positive mold for it then a negative mold altogether to reproduce the “positive” mold it’s connected to the tb like every other intake with a coupler
Naca ducts were designed to be cleaner aerodynamically and still be a fairly good scoop to replace actually great scoops that increase drag a lot. They are NOT great scoops, they are fairly good but don't hurt drag as much. Proper Scoops can't be surface mounted like that.
@@SRDmotorsports saw that video first then hopped onto this video to satisfy my curiosity hahahaha. Hoping you'll share the logs on a future video!. Super interesting design
On the cold air intake, if the dyno hump at 4500 rpm is a resonance than the hump at 7000 rpm probably is as well. In the dyno graph at 6:35 you can even see yet another hump around 2250. 2250x2=4500 4500x2=7000 I bet if the engine revved to 14k it would come into resonance yet again!
@@SRDmotorsports it was great to see this design pick up hp on the dyno, but if you're finding benifits from getting denser air in front of the throttle body it probably just means the TB is a restriction and would benefit from porting! Ideally you don't want to expand and trade flow for density until you're in the intake manifold where the entrance to runners are. You're mostly correct on a lot of your airflow analysis, and I'm no expert, but I've tinkered a bit with lattice-Boltzman CFD and can throw you a few pointers if you're interested.
@@SRDmotorsportsyeah it looks like the longer style cold air picked up better and also cold air is better for the engine in general sorry for the late response 👍
@@SRDmotorsportsalso like you said most times people think short rams are faster in 1st and 2nd gear because yeah short rams do have good throttle response but it’s all an illusion
On my intake design? Actually I think it will help like on the previous approach without my intake design just an intake pipe and bellmouth on inlet In the near future I will try with and without Bellmouth on the dyno and make a video about it
@@zanuarrosyidi4034 thanks man whichever country you are in, i hope it helps either to get faster or more girls oh wait others might not like what i said hahaha but yes your thought on adding another bellmouth at the entry was also in my mind especially for race use but ofcourse as of now the design did its job and dyno is "next" so once i get a chance to test it, we will definitely make a video
@@SRDmotorsports hahaha anyway im from Indonesia, my car is full stock (daihatsu sirion or perodua myvi in Malaysia) its has same intake design with toyota agya or toyota wigo in Philippine. I deleted intake resonator after airbox its sitting on engine bay, just curious if i change inlet size like you do in this video. I can't wait dyno after you add bellmouth, done subscribe bro Thank you
@@zanuarrosyidi4034 oh nice another Iwa K 😎 my fav Indonesian rapper And nice car yeah and for sure I will try on the dyno and it’s nice to see u apply the info properly even on different car that’s the correct way indeed
@@SRDmotorsports yeah now that I tested both my short and cold air on my integra it seems the short ram is quicker at low end and looses mid range but gains it back
How about the simota fat tube ? Small opening and bigger in the middle to small in the Tb is this also apply bernollis ? Or not ? I love your videos im a newbie tuner and builder worth subscribing to you i learned a lot special that bernollis because i am a aeronotical student
Wow thank you if it’s helping your innovative drive :) and as an aero student? Maaaaan you would know more than we know :) I guess you are right I try to have my videos instigate individual innovations for the watchers and for sure a lot of things now you could connect to what you are learning :)
Earlier on I think on this video or another on vstack we did talk about “Tsuchinoko” the actual name of the fat tube, by their design and goal (which I dunno) I assume it’s throttle response it could do it’s job yes but the variable shape of the intake eliminates the “helmholtz resonator” effect or in a sense was called AEM hump cuz they were the first to offer the CAI. it’s why part of my design approach is take some of bernoullis BUT still retain the helmholtz resonance by length that is why u can see it’s still an intake “pipe” before the filter :) Ofcourse only dyno would show results but butt-dyno now? Maaaan I feel a huge difference so soon we will sneak this into a dyno session :)
@@SRDmotorsports thanksss you help a lot see thats why your worth subcribing and i hopefully see you in personal in manila hehe actually i pm with you in fb you replied but im shy to talk with you someday in person 😅 you give me a headstart to become tuner builder keep it up ! And thanks for sharing knowledge regards engine modification 😊
Air intake mechanics very well said!! Lessgo SRD road to 1k subs one love SRD! the copy 🐈 cat part killed me... Ahahahaha GodBless your channel and Audience! -Omar
@@SRDmotorsports It's true Tho, you are the first to verily explain and design build that air intake here in the phils, I've never yet seen it done that way and honestly I'm tired of staring at the ram air plugged at the headlights, your SRD intake concept is a great advantage the engine will provide efficiency with the right breathing system, man we thank you so much for sharing your knowledge to us, continue to strive fam!
@@omar_alanany actually you are right i mean id like to dyno this sooon vs headlight ram vs SRI na simota we know the extended intake ram on headight will make more but if this intake is short by a few only vs alot vs SRI then its a good good thing
I thought about something similar, but not that extreme. There are silicone couplers für boost, that got a bigger diameter in the center. I wanted to try them in front of the throttle body, to create a low speed/high pressure area there. Don't if it would work and i almost forget about it before seeing your video lol. But i can agree with the bumps between 4-6k and 8-9k from switching from short ram to CAI. I had a 3.5" short ram with a custom airbox and a 6" BLOX Vstack inside. Changed it to a custom 3" CAI with a 3"-3.5" elbow coupler to the Vstack and filter and had to add about 5% fuel in those areas. Felt much better.
technically a plenum is an air reserve tank before the runner? the idea was to replicate a close to “ambient” area for the “ideal bellmouth entry” to work 😎
@@SRDmotorsports Yeah, i saw a the dyno video on the b16a it did made 8 whp. But the design theory of it comes close to what an F1 cars use as their intake plenum. One thing I might suggest you use a venturi meter on your design to know how much air pressure is reduced the moment it enters the constricted area. Reduced pressure means increase in air velocity which in turn results in lower temperatures. :)
@@SRDmotorsports I am currently also developing on a intake box that reduces air temperature but on a different approach which is a thermos style intake box. Since the theory of a thermos is to reduce or minimize the 3 things that actually cause increase Air temps (radiation, convection and conduction)
An underrated piece is the Comptech Icebox I think, when somebody dynoed it back to back with the Mugen intake without a remap, overlay was almost identical
@@rinanligan9445 not really a go to but understand that atleast that knew bernoulli's principle didnt include abrupt changes in area as anything like that be it flow or aero creates eddy vortices that can cause reversal etc etc its why we port heads
hi, mate! im now working on a cold air intake box (system) to feed a project i still have , and i found this very interesting video of yours, veryyyyy interesting, my question is : did you find any improvements with this intake design? best regards Calisto.
Oh wow thank you I’m super glad it caused a good spike of interest for you :) Yes the intake on the thumbnail, I can feel and experience the big difference but I haven’t dynoed it so I plan to soon as there is a chance :)
@@SRDmotorsports hello. Well since i will do everything in carbon fiber im studying the pros and cons of making a pressure chamber box so it will be cool not only a extra poneys and the wild noise of resonance. I can send you some details if you want. Keep me in touch. Regards mate!
@@calistofox yes carbon fiber is okay just got to factor in the inside and outside as far as texture goes etc Yes man definitely hit me up at the shop page easier to dm and share or exchange photo and ideas there But if sometimes it gets exciting we move back here for everyone hahaha
@@SRDmotorsports The image is basically a venturi, it is after the venturi that the pressure drops. Your image shows high pressure before and after, so the pressure in the middle would be high also. High speed low pressure only works if there is a pressure differential. An airfoil works because you are creating a high pressure region in front, which creates a low pressure behind accelerating the air over top because it has to travel further in the same time. Did you draw the image or source it from somewhere?
it’s a paper study online but I see what you’re pointing out… The arrow basically shows the direction of airflow… as u stated the vena contracta is the higher airspeed section , so the before and after is lower air speed in relation to that section
Amazing info thanks! I'd like to ask you something because nobody I've talked to seems to know. What's the thing that produces that rattling-chainsaw - metallic like intake sound on the background (like on that Honda @ 0:51 of your intro or in this video: th-cam.com/video/k52r_iVu828/w-d-xo.html&ab_channel=civiccrx2006 )? Is it the intake pipe? The air filter? The velocity stack (if present)? The engine itself? How can I amplify the volume of that sound on my K20?
@@SRDmotorsports Yeah I can clearly hear its revving out like crazy but thats not what I meant. If you listen carefully to the intake sound of the B18C on the link I posted, you can hear "beneath" the engine sound a metallic-rattling-resonance like sound of the air being sucked in. I can't figure out why between cars with the same engine and very similar setups, one car may prominently feature this sound and the other not. Is it the different piping? The different filter pod ? etc etc.
was referring to the differential between Low Pressure and High Pressure High airspeed / low pressure low air speed / high pressure Not Bernoulli’s alone
The pressure difference comes from bernoulli effect, but it's not the pressure difference that keeps the aircraft in the air. It has a small part in that, but the pressure difference is not enough, not even close.
How big of a velocity stack opening at the throttle body is ideal for this setup? I remember seeing a thread on d-series.org back in the early 2010s about the TBRIA but there wasn't too much info on the dimensions.
great question man! and way awesome you saw the TBRIA in d-series just means we all were in the forums 🤣 Usually for a common vstack even on carbs i think radius is half the diameter etc etc but the thing i know is it can change or a diff measurement can work depending on the "suction" strength and availability ahead of the stack... but to be on a generalized zone the stack curve i used is like that and OD on the outside of the stack is 6-6.5" ish i can check on it further later at the workshop aft lunch
You're going JohnnyMac this time!! I had copies of NACA duct documents back in the day, really interesting engineering! Also, can't discuss NACA ducts without citing the F40, hahaha! Check this out: th-cam.com/video/rtEsdUzlIEk/w-d-xo.html To contribute to the discussion: Belben: "i think i would try a large-ish throttle body on a small-ish plenum and runner intake setup.. and then fine tune by trying various intake tubes. ive had really good luck with small diameter (like 2") yet very long intake tubes that had an almost football shaped, stubby, abrupt expansion chamber right on the throttle body. the long/thin intake would enhance the bottom end feel but choke up the top. when i started adding expansion chambers and playing with intake cam timing, id find that the bottom remained and the top woke up." Rocket: instagram.com/p/Bocva4RnZaD/ Your piping layout kinda looks like what this hatch has (Edit: well not so much just the enclosed area): th-cam.com/video/hz4vTYhazsA/w-d-xo.html I'm unable to find the pictures of the underhood ducting of the TRD JTCC Corona but that would be also a good example
maaaan! def good point... when it comes to naca ducts = f40 follows suit hahaha i find it real interesting that until now on F1 theres always Bernoulli working 🤣 some would say its for aero on the outside? ayt sure but it also could be the engineers know they got xx amount of entry available? So they understand with that much inlet by expanding u can run a bigger heat exchanger cuz i doubt theyd run something that they "coulda" run bigger kinda incident
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Results speak louder than words
Here we dyno test this Intake on a b16a
th-cam.com/video/vQQM40lucEg/w-d-xo.htmlsi=BKT9DM59N1RlGQEZ
Really enjoy your vids man and how you're using science and testing to prove out your results, much like another of my favorites: David Vizard.
The idea of using the intake piping as a plenum that then stacks up pressure before the TB is so far from the way folks commonly do things and the results are just as pleasing. LOVE seeing people push the envelope of what can be done, especially when that means totally ignoring what all the "in the know" cats are up to ;>)
Keep up the great work and all the best to you from all the way down in NE Texas :>)
Whoa thanks for that man! And just glad it is also enjoyed by many others! :)
@@SRDmotorsports , dude, I was so jacked about this idea I spent a cuppla hours scourin the ol www this afternoon lookin for some type of application that might have a similarly shaped bit of tubing, ducting, pipe or anything I could use to adapt to make an intake pipe from.
No luck yet but I did think about takin a length of 6" ABS tubing to make a similarly shaped section, then use that as a mold for making one outta fiberglass.
Any better suggestions on what I could use?
And like a total dweeb, here I am replying to myself but, an idea just hit me!
Maybe I could locate an expansion chamber off an old 2 stroke bike. They're usually curved and expanded similarly to your tubing section!
Time to hit the motorcycle junk yard!
@@kimsteele9882 that 2 stroke chamber is a money maker! I mean if u find a similar sized one that’s usable for us that’s gold!
if you are handy with fiberglass (can learn quick) it might be easier to find “molds” to make some…
Or in another case u can just make a shape out of diff plastic sheets or shape and duct tape the heck out of it and that “becomes” your mold 😂
that’s what I did using cardboard (easier to shape and maintain curvature)
I personally found that polishing and smoothing the inside of the intake manifold with sandpaper and a lot of time gives me massive torque differences, It's almost like a whole different engine. There is so much air friction inside the factory system that we underestimate. 💯
Thank you for the video. It was very informative.
That’s def true on the factory systems
"the other homie Bernoulli" 🤣🤣🤣
Gotta pay respects to da homies 😂
I'm a simple guy, I see your new video, I like it and watch until the end.
thanks man! I see you enjoy "thinking" too hence on this video there are alot of moments
heck i wont mind if my condenser is ducted well? more efficiency there is welcome especially cuz summer 🤣
@@SRDmotorsports well they said "if ain't broke don't fix it."
@@spreadhysteria3650 well that is a good point i mean i do sometimes have that in my head too!
BUT maybe we were once the kind of kid who always just had to open up their toy electric car just to "see" 🤣 but key thing is "their own" not others lol
Im against those kinds of shops, the ones that promote new work to customers only cuz its something they found "new" or wanna "learn" about... at the customers expense 😒
havent watched it yet, but alreasy saved to "watch later" this will be an interesting topic again! keep uploading sir
thaaaanks man hopefully this one is good for you and some physics stuff
@@SRDmotorsports good video, but you sound like Chris Griffin from family guy
@@politecat3299 hahahaha maaaan that’s funny hahaha but I hope my English is decent
@@SRDmotorsports your English is great. Don't worry about that.
@@politecat3299 oh okay okay thanks! 😎
engineering this is fun for sure. good write up. hope there is a follow up to this
We did a dyno test of a white civic that we made a video here that we made /called it intake test
i will look for this video. thank you for posting your work!
Here’s the video title
“Throttle Body Radius Inlet Intake Dyno Test”
Quite informative. Looking to apply some of your research on our 2.5L VW
Oh niceee nice
Those 07K motors haul ass!! Lot of people don't realize that they detune if you run 87 octane, my coworker puts premium in his and it woke the hell up, bone stock with hammered engine mounts at 370k kms and he Mogs civic SIs all around town lol
worth following and subscribing since hondatech and hcp days! more power to your channel sir sl@sh research and development!
whoa!!!!!!!! only a Few know the composition of the name!!! shocked 🤣
but yeah i agree its why my attempt is such... my SRDmotorsports shop will continue to operate as normal and we will continue to race but rather than have a channel like most? who just showcase "wow lodi wow solid" i figure id make it a lil different like the "tv" is more on info sharing and shop internal work updates
since we all "marites" at one point we all wanna see how shops are going inside
If you look at porsche intake manifolds for turbos they use the same concept you explained but used it more for temperature control and it gave them much lower intake temps which got them like 12% better fuel economy and more power
excellent observation man! That’s so true I actually didn’t realize or notice that until you mentioned it and checked on it!
and that actually does make sense this concept does actually indirectly (in my case or perception) affects temperature in a good way
as the “expansion” is the opposite of “compressing” air and we know compressing air raises temperature and so the opposite does the favor the other way 😎
Isa nanamang detalyadong video. 😊👍
thank you!!! had to bawi sa chicken cordon bleu mo eh was well done!!!
@@SRDmotorsports ☺
Very informative video. I love it that you are willing to challenge “conventional wisdom”, and put true thought into the modifications that you are testing with.
Thanks for the mention!! I was not expecting that. 😂
I warn you to be careful talking about how great the F40 is with me, you might never get me to stop rambling on. 😂 😂 😂
when you turned the Chevy Canfield head into a "typeR" with the blend deserved this 🤣 oh man Mater gonna be TypeR ish lol
Humble Performance has already dyno tested different intake setups.
Worth checking too.
yep they got that from Hondatech years prior and i was in hondatech since 2003
it was just the length that was working which is "helmholtz resonator" see all dynoes if on ram air extension the spike known as "aem hump" at 4-5k is there
was called AEM hump due to the fact that AEM first introduced a CAI for us and it gave that resonance
hence the design i made was to see if "what everyone uses" for the past 20yrs if it can get any better... pretty much the same for "heat exchangers" while some opt to go full rad when you can see the "feeding" of air is inadequate means there are tons of room of improvement
condenser = epic colder a/c hmm
@@SRDmotorsports acid-burn 🍻
@@findtherightbeat yep HT was acid-burn ftw
@@SRDmotorsports then d15beta, I saw your exchanges with the OGs which were interesting
@@findtherightbeat yeah was gonna say til now its D15beta so when u search posts by username as the years go backwards on the second or third page its still current but all "replied" quotes are acid-burn lol
Informative vid.
I want to improve a 2.5L Triumph PI sedan (saloon). They have a cylindrical 80mm plenum (metal sheet) with 6X 50mm velocity stacks welded inside, then a little curved rubber tube to feed each body of the twins inlets.
According to your thread, I could change the position of the plenum to get straight velocity stacks (instead of the curved shapes) + increase the volume of plenum chamber and inlet (80mm to 100-110mm. Then create a solid 33 inch cold air intake to a filter box on the lower valence front car where there are 2 air vents.
Still don't know how to calibrate the plenum and the filter/filter box . Actual filter box is metal cylindic box 14 diam x 12 length. Mabe reusable as an entry filter box with K&N and a velocity stack feeding pipe (aluminium or inox) to the main plenum.
Sounds like a cool engine… I think plenum wise our engine bays don’t have enough space for the optimum size
So that means just the biggest you can make that’s safe without hitting other parts will be okay and just hope it isn’t too small hehe
But my video actually does different from what u said or thought…
By doing what I did on this video to your Triumph ? It’s like putting a radiused entry or velocity stack to bleed ur 80mm plenum
The goal is to fill the plenum
Thank you for blessing us with more content 🍻
oh man! thank you its guys like you that help give reason to share cuz who knows which aspect of it would end up helping your project, any of it will be awesome!
@@SRDmotorsports yeah man keep it coming 🍻 the guys at the shop i go to like your content. Its a good conversation starter 🔥
@@mikodelacruz oh wow for real?! shop talks? nice! thats definitely nice to know cuz it means we naturally need more shops like that!!!! none of the "a simpe lng yan dalin mo madali lang yan"
🤣
Another great video. Have to match again because it hasa a lot of information. 👍
Thanks Nuno! e a coixas tu pode fazer with your stuff there locally
interesting concept, would like to see the results of that intake.
oh definitely! when i get a chance it will be dyno tested on mine and a friend b20vtec so we have decent comparison...
funny cuz some time ago i was thinking "maybe on a turbo we can see more whp for the same boost" 🤣
3:35 This is a common myth. The air going above the wing will accelerate because of the curve of the wing and therefore speed up and lose pressure but it won’t meet up with the wind it parted with but will actually arrive at the trailing edge faster than the air going below the aerofoil
yep and atleast they did get the point
Hello, Appreciate your adept explanation of the physics of the intake. My question is before the Divergent expansion before the throttle body are you maintaining the same size enter intake pipe diameter as your throttle body at the ventur
Thanks for the comment man…
As of now? Yes same “entry” dia. And throttle body, why? I havnt studied it further to test different scenarios. But it is definitely something I am “actually” looking into
That's great keep me posted !
Can the Bernoulli effect be used on ITBs? What would be the effect of designing a throttle body that slides open horizontally from the bottom, simultaneously with the top of the trumpets?
really depends but the drag or restriction will always be a factor cuz if it wasn’t then we would have seen all ports have a Venturi
it may have but it isn’t as most picture it
It is why CSA matters , valve to port sizing and even Valve to port throat ratio etc
-there’s always been a flat slide throttle ITB too
Detailed explanation and interesting topic. We will see what will be the result. Keep up man, you are rockin. :)
thaaaanks man it is interesting indeed quite addicting to realize changes thanks for checking! :)
@@SRDmotorsports Have to tell ya that there was again WD40 at least 5 min on your video. :)
@@RRRRefuelRideRace yeah the small wd40 was on the other spot Gilberto used it hehehe
@@SRDmotorsports WD40 rulez. :)
@@RRRRefuelRideRace yes sir! hey even in chains right! :)
We all came up with the idea on onecamonly or D-Series .
I designed and drawed this in cad to fit directly onto the TB.Glenniz helped with the production and also designed a polyester intake pipe.Great to see this again.These days i'm better at drawing and i use a 3d printer to create test pieces for my 2018 honda civic 1.5T.I recently used this for a new intake for my civic.What was your Nickname?
Yessssss thank you for that info! I used to pm glenniz ALOT back then on both OCO and series I think one more guy I havnt mentioned is Leshok too… my username in Dseries is sl@sh and in oco I believe rfbuilt or d15beta same in HT yep and props to all u guys definitely!
And it oddly mirrored what Tom aka Tbone did in HT on his 2liter GSR when RLZ worked his head and flowed it = said it was the only one to ever get close to ITB style flow figures
If u used the same? that nickname is def really familiar too 😎
Also got a vid here after this and we dynoed it and gained +6whp back to back
@SRDmotorsports yes I remember those names !My Nick name is Hondanickx, I designed and drew the Throttle body adaptor, and Glenn even shipped it to me along with his intake pipe.I just watched the dyno video and the velocity stack video you made.
6whp gain is ⁰! Really love the content. I need to try this onto my 10thgen 1.5T civic too.
@@hondanickx def do remember ur forum name no doubt and actually when u guys did the TBRIA I was working on other stuff and I stumbled on it like when it was being done via frp which looked pretty cool too!
and yeah reason I said test1 on the video title is I plan to keep testing it out when we have a dyno session as it’s an easy bolt on and just more data for us!
Def worth a try again this time u can prolly improve it even better
Can you review about the difference between PO8 pistons ang P2MY pistons. Thanks
The comp height and dome spec is on the comp calculators
Very informative video! I really liked it and already subscribed. But my question is. What about for turbo engines? Is there a positive effect if the filter end of the intake pipe is larger in diameter and as it goes to the turbo it becomes smaller? For reference HD momentum’s air intake kit for a fortuner. Thank you!
In essence YES granted it’s not tapered beyond ideal , meaning there can be too much taper that in increases drag/restriction at the expense of airspeed… that’s no bueno for turbo inlet
Excellent
Glad u liked this one 🔥
hi, i have some questions: at 3:46 the shape of that "tube" is the same as some intake on ebey (the filter is on the high pressure opening and the low pressure opening is toward the throttle), i was wondering isn't it better to do the opposite? like the one at 4:33?
Well the 4:33 is actually what I did, and I haven’t seen it done except for the guys at dseries the old forum
3:46 so , usually u see intake tubes shaped like that on Civic and other cars . So they got higher velocity and less air pressure entering manifold? Is there some trade off with air temperatures when you "pressurized" intake like this . Maybe im jusy dumb but whould be quiet interesting to see differences in air density
true, good catch on “air density” just not sure how we can precisely measure that real time
But indeed since compressing air = increases temp and that’s constant …the other way is too
@@SRDmotorsports first , thanks for your reply. I didn't expect replies on 2 year old video 🤣🤣🤣
And second, I think only" out of box * solution whould be Banks gauge.i don't know if iDash or data monster,but I feel like second should be more suited for this . Last time I checked they got so much inputs just for air . From outside of cat to intake plenum. Only thing they don't support on Guage is lambda.
Well it was an interesting question 🤣
But hey! Thanks for mentioning those guages now il have to snoop around their offerings…more data gathering never hurt 😎
@@SRDmotorsports nah brother, same as you putting you wisdom and knowledge on internet for others to learn. Im too , trying when I can give some info for others. When we all share some part of knowledge, at the end we all get smarter from it ...
I knew Mr banks from his work on diesel engines. And he too lot of educational videos on TH-cam. although his videos are more about turbos and performance turbo diesels his info still holds . Since it's all about efficiency.
And thru some rabbit hole of Mazda L3 and L5 engines and throttle body "mod" I found that banks OBD2 stuff works on gasoline engines too . And with Mazda drive by wire throttle body.
And then they use thous gauges in their dino room to gather date
Oooooooh that’s def interesting gonna look into Mr banks more on this …def interesting!
How did you frabricated your intake system?
Just frp (fiber reinforced plastic)
@@SRDmotorsports did you use a split mold
Yep
This effect could be achieve by putting an oversized silicone hose connecting the intake pipe and TB? Like, 76-89mm silicone hose in a 68mm TB.
And do you think a 70mm inlet diameter in a CAI is sufficient to feed a 68mm TB? Thank you very much
maybe but that doesn’t replicate a proper shaped velocity stack that’s just a reducer…
70mm is 2.75in dia. Most CAI is 3in so it should be fine but if it’s a true 2.75 it seems “okay” remember diameter is one of the two factors
The CAI also has “length” over all SRI
@@SRDmotorsports it's a ebay CAI and it's supposed to be 3", but I measured last day and the real inner diameter was about 2,75" so I was a little disappointed and thinking in if I should replace it for something bigger. Problem is that is for a TSX/CL9 so options are very reduced and very expensive
Ahhh “undersized” than advertised… that does happen ALOT of times
I think though because it still has “length” it should be fine
@@SRDmotorsports haha thanks dude
No prob man! 🎩
Hopefully in the near future maka daan man lang ako sa shop nyo :D
yeah soon as this pandemic normalizes and after our Palawan trip in the coming weeks
Present for today's class chief. 🙋♂️
thanks man! hopefully this video gives others more ideas on how they can tweak theirs...
but also to show them that their lodi's prolly just listen to fb experts and that their own research may do them alot better ftw
meron po akong d16a non-vtec p2a-6 head p2k intake manifold kapag pinalitan ko po ng 70mm ang throttle body okay lng po ba?
Lxi manifold or vti
70mm is too big for a vti / esi / sohc manifold
And also as u watched the video it doesn’t really say 70mm means more
Power or better etc
A lot of b18 and b16 I’ve build kargado nka 62mm ITR throttle lng
And that’s coming from us a shop that Carries and sells 70mm Omni throttle btw so u can be sure no salestalk lol
how do you create the piece at 3:58 ? and how you connected it to che Tb?
It’s composite material made a positive mold for it then a negative mold altogether to reproduce the “positive” mold
it’s connected to the tb like every other intake with a coupler
Naca ducts were designed to be cleaner aerodynamically and still be a fairly good scoop to replace actually great scoops that increase drag a lot. They are NOT great scoops, they are fairly good but don't hurt drag as much. Proper Scoops can't be surface mounted like that.
yrs sir thats true on the not increasing drag on the naca ducts
I'm curious, did this design make the map sensor read positive pressure since you're "inducing" high pressure into the intake?
No datalogs yet but we did dyno test it on one car the video is on this channel
@@SRDmotorsports saw that video first then hopped onto this video to satisfy my curiosity hahahaha. Hoping you'll share the logs on a future video!. Super interesting design
Definitely will soon as we get more data for sure!
lodi yarn!! 💪💪
thanks yo
Time to buy a fibreglass kit!
it’s really useful for rapid prototyping
Honestly 3d printing and some basic CAD knowledge is also deeply useful for this kind of thing
true 💯!!!
Are you going to run this on ur new setups?
when mine is running yeah, for now we will continue to do tests, there’s been one on a b16a for now on the playlist, will test it further
it’s actually pinned here, gained 6whp vs a regular common 3in intake
@@SRDmotorsports good info, im currently building one for my e46 racecar.. see how it goes
Nice nice
On the cold air intake, if the dyno hump at 4500 rpm is a resonance than the hump at 7000 rpm probably is as well.
In the dyno graph at 6:35 you can even see yet another hump around 2250.
2250x2=4500
4500x2=7000
I bet if the engine revved to 14k it would come into resonance yet again!
Yep exactly! awesome observation btw! that’s quite keen!!
@@SRDmotorsports it was great to see this design pick up hp on the dyno, but if you're finding benifits from getting denser air in front of the throttle body it probably just means the TB is a restriction and would benefit from porting! Ideally you don't want to expand and trade flow for density until you're in the intake manifold where the entrance to runners are.
You're mostly correct on a lot of your airflow analysis, and I'm no expert, but I've tinkered a bit with lattice-Boltzman CFD and can throw you a few pointers if you're interested.
Those are nice and good points btw
Sadly we have just had 1 dyno for now so we gotta test some more with diff throttle/manifold combos
So for a non VTEC b18b1 what’s better short ram or cold air intake
See on the video there’s a dyno sheet reference of where what improves
And that rpm ideally u can compare to any engine of the same rpm
@@SRDmotorsportsyeah it looks like the longer style cold air picked up better and also cold air is better for the engine in general sorry for the late response 👍
@@SRDmotorsportsalso like you said most times people think short rams are faster in 1st and 2nd gear because yeah short rams do have good throttle response but it’s all an illusion
so so true
Love this !
Yesss it helps indeed 😎
@@SRDmotorsports I love those not "clean" looking but hella functional DIY parts.
Yess
What happen if you add bellmouth/velocity on inlet? Do you think it help power gain or not?
On my intake design? Actually I think it will help like on the previous approach without my intake design just an intake pipe and bellmouth on inlet
In the near future I will try with and without Bellmouth on the dyno and make a video about it
@@SRDmotorsports yes in your design, anyway i love your intake design thank you for sharing. I learned something from your intake design
@@zanuarrosyidi4034 thanks man whichever country you are in, i hope it helps either to get faster or more girls
oh wait others might not like what i said hahaha
but yes your thought on adding another bellmouth at the entry was also in my mind especially for race use but ofcourse as of now the design did its job and dyno is "next"
so once i get a chance to test it, we will definitely make a video
@@SRDmotorsports hahaha anyway im from Indonesia, my car is full stock (daihatsu sirion or perodua myvi in Malaysia) its has same intake design with toyota agya or toyota wigo in Philippine. I deleted intake resonator after airbox its sitting on engine bay, just curious if i change inlet size like you do in this video. I can't wait dyno after you add bellmouth, done subscribe bro
Thank you
@@zanuarrosyidi4034 oh nice another Iwa K 😎 my fav Indonesian rapper
And nice car yeah and for sure I will try on the dyno and it’s nice to see u apply the info properly even on different car that’s the correct way indeed
So I’m wondering why do people put short ram Intakes on they hondas?
it’s the easiest thing to do and cheaper than a cold air intake + the myth of “short ram for top end” lol
@@SRDmotorsports yeah now that I tested both my short and cold air on my integra it seems the short ram is quicker at low end and looses mid range but gains it back
yep and on some earlier vids here I’ve shared dynosheet of the CAI vs SRI test I did years ago
Thank you 👌🏼
I’m glad! And we did get to do a random test on this on a b16a check it out
How about the simota fat tube ? Small opening and bigger in the middle to small in the Tb is this also apply bernollis ? Or not ? I love your videos im a newbie tuner and builder worth subscribing to you i learned a lot special that bernollis because i am a aeronotical student
Wow thank you if it’s helping your innovative drive :) and as an aero student? Maaaaan you would know more than we know :) I guess you are right I try to have my videos instigate individual innovations for the watchers and for sure a lot of things now you could connect to what you are learning :)
Earlier on I think on this video or another on vstack we did talk about “Tsuchinoko” the actual name of the fat tube, by their design and goal (which I dunno) I assume it’s throttle response it could do it’s job yes but the variable shape of the intake eliminates the “helmholtz resonator” effect or in a sense was called AEM hump cuz they were the first to offer the CAI. it’s why part of my design approach is take some of bernoullis BUT still retain the helmholtz resonance by length that is why u can see it’s still an intake “pipe” before the filter :)
Ofcourse only dyno would show results but butt-dyno now? Maaaan I feel a huge difference so soon we will sneak this into a dyno session :)
@@SRDmotorsports thanksss you help a lot see thats why your worth subcribing and i hopefully see you in personal in manila hehe actually i pm with you in fb you replied but im shy to talk with you someday in person 😅 you give me a headstart to become tuner builder keep it up ! And thanks for sharing knowledge regards engine modification 😊
@@jhonpatrickflores8273 yes keep it up man! you will pick up and learn more than usual because you are studying close to the subject
This video is a 💎
Oh thaaaaanks man! And fo sho soon we will dyno test it to make it worth while for all ftw
I like your outside the box thinking.
Thanks brother! That’s having good coffee in the garage on a Sunday morning 😎 lotsa things to think and ponder about 😂
@@SRDmotorsports that's me about 2am
Hahaha maaaan! Same here except 2am here sometimes is daytime stateside so nobody notices lol
Air intake mechanics very well said!! Lessgo SRD road to 1k subs one love SRD! the copy 🐈 cat part killed me... Ahahahaha GodBless your channel and Audience! -Omar
hey man! thanks :)
and I actually once again laughed after i said that part but it is true 🤣
@@SRDmotorsports It's true Tho, you are the first to verily explain and design build that air intake here in the phils, I've never yet seen it done that way and honestly I'm tired of staring at the ram air plugged at the headlights, your SRD intake concept is a great advantage the engine will provide efficiency with the right breathing system, man we thank you so much for sharing your knowledge to us, continue to strive fam!
@@omar_alanany actually you are right i mean id like to dyno this sooon vs headlight ram vs SRI na simota
we know the extended intake ram on headight will
make more but if this intake is short by a few only vs alot vs SRI then its a good good thing
I thought about something similar, but not that extreme. There are silicone couplers für boost, that got a bigger diameter in the center. I wanted to try them in front of the throttle body, to create a low speed/high pressure area there. Don't if it would work and i almost forget about it before seeing your video lol. But i can agree with the bumps between 4-6k and 8-9k from switching from short ram to CAI. I had a 3.5" short ram with a custom airbox and a 6" BLOX Vstack inside. Changed it to a custom 3" CAI with a 3"-3.5" elbow coupler to the Vstack and filter and had to add about 5% fuel in those areas. Felt much better.
Yep
You essentially made an intake plenum before the throttle body. Interesting. 🤔
technically a plenum is an air reserve tank before the runner? the idea was to replicate a close to “ambient” area for the “ideal bellmouth entry” to work 😎
we did get to dyno test it on a car, vid somewhere in the playlist
@@SRDmotorsports Yeah, i saw a the dyno video on the b16a it did made 8 whp. But the design theory of it comes close to what an F1 cars use as their intake plenum. One thing I might suggest you use a venturi meter on your design to know how much air pressure is reduced the moment it enters the constricted area. Reduced pressure means increase in air velocity which in turn results in lower temperatures. :)
@@SRDmotorsports I am currently also developing on a intake box that reduces air temperature but on a different approach which is a thermos style intake box. Since the theory of a thermos is to reduce or minimize the 3 things that actually cause increase Air temps (radiation, convection and conduction)
True on the f1 stuff back on the v10 era they expand it to the max to give the bell mouth entry a good thing
Reminded me of the ARC intake, only that the intake source is indirect. Would love to hear your thoughts about it. :D
yeah except thats just a random chamber i mean the tsuchinoko may function better actually
@@SRDmotorsports I remember the tsuchinoko, not sure why it sold so much
An underrated piece is the Comptech Icebox I think, when somebody dynoed it back to back with the Mugen intake without a remap, overlay was almost identical
@@SRDmotorsports another tip learned! thank you so much! so the go to for a good aftermarket intake would be that of tsuchinoko concept.
@@rinanligan9445 not really a go to but understand that atleast that knew bernoulli's principle didnt include abrupt changes in area as anything like that be it flow or aero creates eddy vortices that can cause reversal etc etc its why we port heads
hi, mate! im now working on a cold air intake box (system) to feed a project i still have , and i found this very interesting video of yours, veryyyyy interesting, my question is : did you find any improvements with this intake design? best regards
Calisto.
Oh wow thank you I’m super glad it caused a good spike of interest for you :)
Yes the intake on the thumbnail, I can feel and experience the big difference but I haven’t dynoed it so I plan to soon as there is a chance :)
@@SRDmotorsports hello. Well since i will do everything in carbon fiber im studying the pros and cons of making a pressure chamber box so it will be cool not only a extra poneys and the wild noise of resonance. I can send you some details if you want. Keep me in touch. Regards mate!
@@calistofox yes carbon fiber is okay just got to factor in the inside and outside as far as texture goes etc
Yes man definitely hit me up at the shop page easier to dm and share or exchange photo and ideas there
But if sometimes it gets exciting we move back here for everyone hahaha
@@SRDmotorsports will do my friend will do. I will respond in my professional page instead of this one. Regards.
@@calistofox alright no problem
can we see the finish product man?
We did a dyno test with an siR with b16a engine and had good gains
sir pwedi po ba iflycut combustion chamber ng d15b? maraming salamat sa sagot sir.
The question is why? And what for? To kill/lower compression?
✊🏾❤️✊🏾
Oh thank you my brother! Glad this was good for ya
The image at 1:42 is incorrect. The centre would be high pressure high speed.
high speed is low pressure by terminologies… compressed high pressure = low or zero airspeed
@@SRDmotorsports The image is basically a venturi, it is after the venturi that the pressure drops. Your image shows high pressure before and after, so the pressure in the middle would be high also. High speed low pressure only works if there is a pressure differential. An airfoil works because you are creating a high pressure region in front, which creates a low pressure behind accelerating the air over top because it has to travel further in the same time. Did you draw the image or source it from somewhere?
I found the image on google images, but if you look at other examples they will correctly display after the restriction the pressure is lower.
it’s a paper study online but I see what you’re pointing out…
The arrow basically shows the direction of airflow… as u stated the vena contracta is the higher airspeed section , so the before and after is lower air speed in relation to that section
@@SRDmotorsports Yes, but after the restriction there is also lower pressure.
i am now an expert
🫡
Amazing info thanks! I'd like to ask you something because nobody I've talked to seems to know.
What's the thing that produces that rattling-chainsaw - metallic like intake sound on the background (like on that Honda @ 0:51 of your intro or in this video: th-cam.com/video/k52r_iVu828/w-d-xo.html&ab_channel=civiccrx2006 )?
Is it the intake pipe? The air filter? The velocity stack (if present)? The engine itself?
How can I amplify the volume of that sound on my K20?
I believe it’s the rpm u hear I mean at 0:51 that b20vtec is shifted at 9,700rpm hehe
@@SRDmotorsports Yeah I can clearly hear its revving out like crazy but thats not what I meant. If you listen carefully to the intake sound of the B18C on the link I posted, you can hear "beneath" the engine sound a metallic-rattling-resonance like sound of the air being sucked in.
I can't figure out why between cars with the same engine and very similar setups, one car may prominently feature this sound and the other not. Is it the different piping? The different filter pod ? etc etc.
@@NAmania it’s mainly the piping length
@@SRDmotorsports And I guess shorter= louder?
@@NAmania yes but it has to harmonize with exhaust size/length too
no computation tho?
computation of? we don’t race numbers we dyno tested this already
We tested this on a B16a just bolted it on no tuning and was surprised at the gains! Check it out
th-cam.com/video/vQQM40lucEg/w-d-xo.html
Hate to break this to you but planes don't fly because of the bernoulli principle...
I did not say that
@@SRDmotorsports 3:39 "...therefore it produces lift and goes flying."
was referring to the differential between Low Pressure and High Pressure
High airspeed / low pressure
low air speed / high pressure
Not Bernoulli’s alone
The pressure difference comes from bernoulli effect, but it's not the pressure difference that keeps the aircraft in the air. It has a small part in that, but the pressure difference is not enough, not even close.
alright
How big of a velocity stack opening at the throttle body is ideal for this setup? I remember seeing a thread on d-series.org back in the early 2010s about the TBRIA but there wasn't too much info on the dimensions.
great question man! and way awesome you saw the TBRIA in d-series just means we all were in the forums 🤣
Usually for a common vstack even on carbs i think radius is half the diameter etc etc but the thing i know is it can change or a diff measurement can work depending on the "suction" strength and availability ahead of the stack... but to be on a generalized zone the stack curve i used is like that and OD on the outside of the stack is 6-6.5" ish i can check on it further later at the workshop aft lunch
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you have no idea what you're talking about. P1 would be less than P2
Didn’t say otherwise?
You're going JohnnyMac this time!!
I had copies of NACA duct documents back in the day, really interesting engineering! Also, can't discuss NACA ducts without citing the F40, hahaha! Check this out: th-cam.com/video/rtEsdUzlIEk/w-d-xo.html
To contribute to the discussion:
Belben: "i think i would try a large-ish throttle body on a small-ish plenum and runner intake setup.. and then fine tune by trying various intake tubes. ive had really good luck with small diameter (like 2") yet very long intake tubes that had an almost football shaped, stubby, abrupt expansion chamber right on the throttle body. the long/thin intake would enhance the bottom end feel but choke up the top. when i started adding expansion chambers and playing with intake cam timing, id find that the bottom remained and the top woke up."
Rocket: instagram.com/p/Bocva4RnZaD/
Your piping layout kinda looks like what this hatch has (Edit: well not so much just the enclosed area): th-cam.com/video/hz4vTYhazsA/w-d-xo.html
I'm unable to find the pictures of the underhood ducting of the TRD JTCC Corona but that would be also a good example
maaaan! def good point... when it comes to naca ducts = f40 follows suit hahaha
i find it real interesting that until now on F1 theres always Bernoulli working 🤣 some would say its for aero on the outside? ayt sure
but it also could be the engineers know they got xx amount of entry available?
So they understand with that much inlet by expanding u can run a bigger heat exchanger cuz i doubt theyd run something that they "coulda" run bigger kinda incident