ITB project is under way

[midnightsliding]

pics we need pics.

[j-z]

i made the plenum out of an assortment of aluminum sheet to get the whole shape, and then glassed it all together. it turned out really really nice. thats what took me the longest. i would have rather wanted the thing tig welded, but i cant do that and didnt have the money to fork out to pay someone. i already had the glass materials here, so i had at it which im very pleased with the results. the plenum attatches to the throttles with rubber couplings. panda, did you space your throttles out any? i didnt so thats why my couplings are a bit long and collapse.

[PandaS14]

no, I didn't space mine out at all. I'm still confused as to where they collapsed. could you show me in this pic?

Pic for reference....



And about the throttle wheel. I'm surprised you don't like the GSXR one. I love it. makes the engine feel so much more responsive. It takes a couple days to get used to. I encourage you to stick with it for a few more days and see if you like it more then.

[midnightsliding]

can u space them out?

[deviousKA]

You can space them out individually if you have the 02-04 throttles. These are the kind im using.



each of the throttles can be split same as the middle in that picture. You will have to make spacers and extend throttle shaft linkage obviously.

btw my runners arent that long anymore.

[midnightsliding]

whatabout my manifold hack pic i sent u the other night devious KA , u think i will ahve to space them out any? ( flam for the 4th runner i ****ed up goign to grind them down )

[deviousKA]

Yeah you will be able to space them out to your manifold easily. You might not even have to modify the throttle system, they can split like 1/4-3/8" before you would have to rework and extend the levers.

[SonyPete]

Wow what a hack job midnightsliding

You should have just put the TB's up to the pre-hacked mani and eyed it to see where cutting it would line up the TB's the best. Take your time man no rush

[PandaS14]

Midnight, you'll definately have to space them out. I cut mine another ~2" longer and they are as short as you can go without having to space the GSXR throttles.

Good luck with your project!

[midnightsliding]

yeah like i said i ****ed the 4th runner up and i was going to grid it down, i have 5 intakemanifolds to mess with, and i wanted to go with shorter runners, i dunno im in no hurry to finish this project this was just a pratice on to begine with but if i can use it i will.

[j-z]

OMG, i just got done putting about 80 highway miles on my car and damn! on the highway it just pulls and rides out so much better than it ever did before. im so happy! it kills the speed limiter quick. i have to get rid of that thing now. panda, i have the same throttles devious has, and they dont line up to the stock mani like yours do. i have to leave my couplings long to make up for the difference, and they collapse being a lil long. she runs really great yall. hopefully i can get some pics up for yall shortly. its alot more fun to drive in the twisties now. its killer.

[GhostDriver]

Do you got a pic? I'm interested in the plenum and maf setup. I love ITBs but I never imagined them on the KADE.

[InsanityInc]

It's possible you just cut your runners at different points. The runners get further away from eachother as they approach the head.

[InsanityInc]

My official ghettorig suggestion for fixing your collapsing couplers is to get a slightly bigger diameter coupler and put a piece of PVC pipe in it.

[j-z]

our manifolds our cut in the exact same spot. his throttles are just spaced out a bit differently. ive already though about putting some aluminum tubing in that i have here which would prob work. yesterday i put a porsche 944 throttle rotor on. so much better now!!!!

[j-z]

alrighty, i solved the collapsing coupling problem. i just cut up some aluminum tube and put it inside each coupling. i have all of the bugs worked out now, and she runs perfect! i have picked up and gained through out the entire rev band. if anyones thinking about doing this, it was well worth every minute i have into this project. finally im done! now i just need to get yall niggas some pics .

[InsanityInc]

and a dyno.

[cyrus240sx]

man that looks awesome..... how much do the throttles cost? and what othe rthings do you need for it to run?

[SSS]

It's been covered before, but essentially what you need is:

- ITB's (Suzuki GSXR 1000 seem to be widely available for a good price)- Aftermarket EMS if you want to eliminate the MAF (MegaSquirt again is a favorite for the cost)- Plenum and appropriate piping to stock MAF if keeping stock EMS- Vaccuum log and fittings to retain decent brakes/FPR- Silicon couplers to attach to cut down stock lower intake manifold & hose clamps- Of course, the lower intake manifold to modify to attach the ITB's

[cyrus240sx]

hmm very interesting..... now this might be hard to answer... but what gains would someone see if they had a turboed ka with stock intake compared to turboed with itb's?

[Nismo_Freak]

hmm very interesting..... now this might be hard to answer... but what gains would someone see if they had a turboed ka with stock intake compared to turboed with itb's?

Depends on the flow level.

I don't think until you are pushing 300+ you will see any benefit in an intake manifold change. Simply because the turbocharger is pressurizing the intake manifold, the limiting factor is how much the engine can take in per the head flow.

Once you get a big enough turbo where you have large pressurized flows that are being restricted by the manifold's physical shape will you see gains.

It's different on a N/a engine where sheer engine vacuum is all you have to work with to provide flow.

[InsanityInc]

Depends on the flow level.

I don't think until you are pushing 300+ you will see any benefit in an intake manifold change. Simply because the turbocharger is pressurizing the intake manifold, the limiting factor is how much the engine can take in per the head flow.

Once you get a big enough turbo where you have large pressurized flows that are being restricted by the manifold's physical shape will you see gains.

It's different on a N/a engine where sheer engine vacuum is all you have to work with to provide flow.

There actually are gains even at relatively low levels. There's a dyno somewhere of someone upgrading to the really short runner greddy manifold on the SR20DET and it made his torque stay within 5% of peak all the way to redline, but with the stock one he had lost about 25% torque by redline.

[Nismo_Freak]

There actually are gains even at relatively low levels. There's a dyno somewhere of someone upgrading to the really short runner greddy manifold on the SR20DET and it made his torque stay within 5% of peak all the way to redline, but with the stock one he had lost about 25% torque by redline.

Dyno on what ... a stock engine?

The limit on the stock cams / manifold for the SR seems to be in the 330whp ballpark. Most of the restriction is the cams.

[InsanityInc]

Dyno on what ... a stock engine?

The limit on the stock cams / manifold for the SR seems to be in the 330whp ballpark. Most of the restriction is the cams.

No, it was modded, but only to about 260whp if I recall. I think it may have had different cams. With a turbocharged car, short *** runners are even more important because since you're forcing the air from the turbo to the engine, the less distance to travel the better.

[PandaS14]

well I'll be dyno tuning my ITB setup this week, so we'll see how much power it's making. I'll post up the results.

[Red coupe]

Right on very curious to see a ball park for what kinda gains this adds...

[cyrus240sx]

yeah id like to see some dynos ... if i could get close to 200 whp with itb's rather than turbo i might even go that route

[Nismo_Freak]

yeah id like to see some dynos ... if i could get close to 200 whp with itb's rather than turbo i might even go that route

Turbo will be cheaper and faster than an N/a KA

1. You won't make 200whp on stock compression 2. You won't make 200whp on stock camshafts

If you are having any second guesses at building a N/a KA then I don't think you are going to be satisfied in the long run. It's one of those things you just build for the sake of building it.

[Nismo_Freak]

No, it was modded, but only to about 260whp if I recall. I think it may have had different cams. With a turbocharged car, short *** runners are even more important because since you're forcing the air from the turbo to the engine, the less distance to travel the better.

260whp = larger than stock turbo if it's a high-port

If it's a low port then it's a moot point as I was talking about the high-port manifold since it most resembles the KA's.

Plus cams, like I said, are more of the restriction than the intake manifold.

There really is little gain to be had by replacing the stock SR manifold with sub 300whp power.

[cyrus240sx]

Turbo will be cheaper and faster than an N/a KA

1. You won't make 200whp on stock compression 2. You won't make 200whp on stock camshafts

If you are having any second guesses at building a N/a KA then I don't think you are going to be satisfied in the long run. It's one of those things you just build for the sake of building it.

i know.... but a high comp, high revving ITB'd KA would be the coolest thing evar!