Itbs

[s13neo]

have searched but their seems to be f all info and feeback about itbs for rbs.

So anywhy, went ahead and won this

Rb26 plenumn

Rb26 ITB's

Adapter plate to suit Rb25 head.

Figured i may as well try set this up and see how it goes.

now i havnt recieved it yet but from what ive been reading i can either run off a MAP or TPS sensor, obvious things like tuneable ecu for such and other things like getting vacuum for booster, FRP ect.

From what ive read people either get a vacuum pump or simply set up a vacuum manifold and run a line off each throttle boddie to the chamber then one to booster, frp and whatever else needs it?

Can anyone shed some light onto the situation or put their feedback into this?

Cheers matt.

[zebra]

Have a look at Greg's (gergR31) build thread

Has a 26/30 Na combo that makes some good power

[screamin']

You're right, there is f all info out there on them. Didn't stop us from building a setup though.

I've been running ITB's on my rallycar for a few years now and they work a treat. http://www.skylinesdownunder.com/forums/showthread.php?t=52581&page=14

Mine are 4AGE Toyota ones off a 20 Valve, mounted on an adaptor plate and the original intake runners. Cam, head, pistion work etc has leat to a fairly angry little N/A RB20DE. Has taken a few years of tuning and trying things as no one in NZ had done one like this, so it was a bit hit and miss originally.

Mine runs open trumpets with individual filters, so all tuning is done from the TPS, which works fine now.

As far as the brake booster goes I had the same issue with lack of vacuum, made worse by the cams I run. I run a Wilwood dual cylinder pedal box for brake bias, which also means I can run with no booster and it is a good leg work out.

Good luck with the build, even if it does't go faster it will sound fantastic!

[s13neo]

will do zebra cheers

awesome work screamin!, sounds pretty throaty. although seems the induction goes away higher in the revs?

Dont have that sort of money for such a brake set up haha, but mine wont be as crazya s what you have done, as you said, im not chasing power, more sound and something different.

What sort of ecu are you running?

Also mine arrived today , look pretty good, going to be a fun job.

[asps91]

Get some cams to make the most out of it!

[screamin']

From in-car is sounds like the induction dissapears, but does make some good sound from the outside. Just off the 8,600rpm limiter coming up to the camera.

ECU is a Link G4 and cams are a must IMO.

[walky01]

hey im also interested in something like this for my 25/30.... best option seems to be buying an adapter plate (rips quoted me $500) and using the rb26 bits.... i need a tune anyway so this seems like the best option... if anyone has a setup or something give me the ballpark figure in what im expected to spend ! haha

[Captain Natro]

Car sounds great screamin, itbs are simply amazing sounding once u get them set up have heard stories of individual socks robbing power and to use a closed intake with cai feed. Not 100% sure, good luck mate

[bozodos]

how did your tuna find tuning the ITBs? lol.

[10 4]

ITB NA Skylines sound amazing.

[screamin']

Took about three years of tuning and racing before we got it really humming. Unlike more conventional RB setups (read turbo) there are no preset maps to start with for the ECU. Stpe one was to make it start, step two idle and so on... For the last five years I've been running this setup I have had the trumpets open with individual filter socks. A real pain having to clean them all the time because of the gravel dust, but clean filters makes a big difference to the power output.

I am planning on getting an airbox built, but am too busy racing it to pull the intake off and make something up, plus it's going alright atm, so no point fixing it...

[luke gtr]

I am planning on getting an airbox built, but am too busy racing it to pull the intake off and make something up, plus it's going alright atm, so no point fixing it...

dont fix what aint broke.