87 turbo - Toyota Nation Forum : Toyota Car and Truck Forums

Walka · 09-08-2005, 02:21 PM

im curious
stock with 6psi right?
i know more psi the lowre the life span correct?

with a stock engine and a boost controller, what is the highest boost setting the 7m can handle safely?

***bgrieger*** · 09-08-2005, 03:50 PM

You won't pass ~12. Computer has a failsafe that will shut down fuel delivery at around this value.

Walka · 09-08-2005, 09:12 PM

is 12 safe?

ahmedootie · 09-08-2005, 09:32 PM

IMHO 9 is a pretty safe daily driving PSI...11 is kind of pushing it

Jeeves · 09-09-2005, 09:56 AM

I ran 9 for a year. It kept me quite happy.

MkIII_Driver · 09-09-2005, 10:10 AM

question about the fuel cut off. So heres the deal the guy who i bought my car from was running 17psi. i have turned it down of course. the car has no fuel managment that i know of. how is this possible im running 14psi and dont feel any fuel cut off around 12 psi???? Im not sure whats going on or how that is possible. any information is helpful

Jeeves · 09-09-2005, 10:13 AM

You can install "Fuel Cut Defensers" (FCD's) to remove the limit, they're tiny boxes, not hard to install.

Other than that, a stand alone, SOME piggy back devices, and many HKS products (VPC, SAFR(IIRC)) will remove the limit. Other than this, there's not a way around it. You can't just unplug a sensor and it goes away.

Either way, with stock fuel above 12psi is asking to blow something up, the fuel system CANNOT keep up and will lean it out and grenade the motor.

Walka · 09-09-2005, 10:43 AM

is it worth the sc400 afm on daily driving?

meaning, would it make the car run and better ? gasmileage :-p

Jeeves · 09-11-2005, 03:08 PM

No. You want gas mileage, that's the wrong way to go. You HAVE to do the Lexus AFM with injectors otherwise you can expect to have a dead motor. 550's + Lexus, can't do one or the other.

Walka · 09-11-2005, 10:43 PM

oh i get it, thx