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Old 14 Dec 2012, 12:32 pm
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Default high comp honda vtir (gsr) build quesitons?

do i need to change the ecu if i go higher compression forged pistons?? and also do i need to change injectors?
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Old 14 Dec 2012, 12:48 pm
PK PK is offline
Join Date: Jun 2012
Posts: 85

You won't need to change your ECU based on your compression ratio. Your best bet would be to chip your current ECU to allow tuning. This is cheap and relatively easy.

I always recommend buying aftermarket injectors when building any motor. But if you're running stock fuel pump, there is no point. Grab a walbro 255lph fuel pump and an aftermarket fuel pressure regulator and go from there. Remember that you can buy 1000cc injectors even if you don't need them, that is just the MAX. You can tune the injectors to any amount under that cap using fuel management options while tuning your chipped ECU.

I hope this helps. Hit us up if you need help!

Good luck!
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