Hi guys, I just have order KO Racing T3/T4 46 Trim and I think I will install it into my MR2 this weekend.

Ok now, how many PSI should I set at with stock fuel system?
Thanks
JDMR2

I would not go more than 15 psi if oy uhave stock fuel.
If you have the stock intercooler, you might want to stay at 13 psi.

Do you have access to at least 93 octane fuel?

what parts of the fuel system should be upgraded to support that same kit and 300whp?

Absolutle minimum:
Adjustable fuel pressure regulator
Supra 550 cc injectors
Apexi SAFC

Recommended:
Adjustable fuel pressure regulator
Supra 550 cc injectors
EMS (engine management system).

I currently have stock fuel system. Can I upgrade my fuel system to Supra fuel pump, Supra fuel injector 550cc, and Sard fuel regulator without using any engine management system? I really don't want to go that heavy mods.

I have heard that Apexi SAFC really suck for our car...is that true?

If you install a bigger fuel pump & bigger injectors you are going to need something to control them with. You will have to get into electronics if you want to hit 300 rwhp safely and reliably.

The SAFC can be used on our cars, but there are some quirks with it that make it potentially a problem.

I would suggest the aeromotive fuel pressure regulator. This is what I bought for the AFPR:
www.trueleo.com/fpr.htm

Thanks JekyLandHyde