Adding ITB to 2NZ... Big power gains

[RomanDave]

Hi,

I've tried a few different things on my engine while running a Link G4+ ECU where it's quite easy to quantify if a mod has made more power or not.

Basically with the standard intake, changing any of the airbox piping or air filter or anything like that, including completely removing all of it (MAF not needed anymore) does absolutely nothing at all.

So looking at the tiny throttle body and tiny long runners, thought I'd slap together an ITB setup on an otherwise standard 2NZ motor.

Couldnt believe the difference!

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Now pulls decently to ~7200rpm where it valve bounces.

At the drags ran a 16.4 @ 83mph which was 1.2 seconds faster than with standard motor and intake.

2.5 second 60ft.
I reckon it could get into 15s with a C56 gearbox and a good launch.

Took it to a trackday and despite the C152 gearbox really killing the fun (only 2 usable gears) it was a real blast.

https://www.youtube.com/watch?v=sFatZ3pmr18