Injector Questions?
 

ANyone running mkiv supra USDM 550 on their 1jz ...if so ..Are they drop in? OR do you need to do some mods???

You will need to wire in a resistor pack to run the usdm 550's. The jdm 2jzgte 440 injectors would be drop in with no issues. You will want some type of fuel controller or you will run rich.

so in order to run the 550 i would need a Fuel pressure regulator, i wire in a resistor pack???? which one is recomended??? Will dsm ones work? OR what else///////

Im not sure, check with the 1jz guys on supraforums.

USDM 2JZGTE MKIV 550's are drop in, but you have to shave the clips a hair on the injectors for a good snug fit.

Buy new o-rings. $26 from toyota.

You will need to wire in a resistor pack. Mkiii one is good and small, can be hidden under intake manifold.

Stock FPR is perfect, but you will need at least an SAFCII. You can find em used all over for $200 or less.

MKIV JDM 440cc injectors do not need the resistor pack.

On a 1JZGTE, you can figure around 1WHP per CC at 100% duty cycle.

No matter what you do, with a single setup, youll need basic fuel managment, like an SAFC2, proven to put 1JZGTEs in the 500+whp range.