I run a set of 4 ITB's if that helps? Self built using a custom intake, 4x51mm Hayabusa bodies and a Megasquirt. We have been running them for almost 4 years and they work very well, however we built the motor to take advantage of the bodies, porting, rotating assembly, etc... As well, we played with injectors, injector placement, fuel pressures etc...... and found a setup, that is remarkably close to stock, that runs very well. It was sort of a full circle and when we got back to using many of the stock components, things started to work very well.

The only issue we found was to get the throttle tip in correct as the car goes from full vacuum to no vacuum in a millisecond, LOL. The car pulls hard from 4,000 rpm to well over 9,500 rpm and I haven't taken it higher than that, but I do know that a co-driver of mine pulled to over 10,000 rpm, yikes!!!!!!!

Any questions that you have, I would be willing to assist. By the way, at full song, the car sounds freakin' great.

Eric

 

So is your car strictly a track car? I am curious because I want to do he same thing but with a hx35 or 40 thrown in the mix... but mine will see daily duty.

 

Those hyabusa itbs on ur 13b look sick. That's what I've been wanting to do.do u have any better pics of the manifold? I'm in love. I'm planning to bridge and want to go back to efi since I'm using 48mm dellorto carb now but don't want tge factory efi back lol.