1jz Fuel Pressure?

[Tim]

I just got an adjustable fuel pressure regulator kit and I was wondering what the stock base fuel pressure is on a 1j with the vacuum line off??

 

[Van Diesel]

I remember FP to around 45 psi or 3 bar. Think it is a tad lower (I set mine higher slightly higher than stock). Like 43~

 

[bigaaron]

We usually go with 38psi, but for your purposes Tim, you might want to go with around 45psi. That will let you lean it out a little more using your afc, which should increase the fuel cut boost pressure.

 

[Tim]

cool thanks guys. That is with the vacuum line off right Aaron?

 

[bigaaron]

cool thanks guys. That is with the vacuum line off right Aaron?

Yes, set it with the engine running with no vacuum line connected.

 

[becauseican]

Stock should be 33-38 psi as per the mk3 TSRM. I have mine set at 30 psi, scince I am using 550's with a Mines ecu and an afc, and i am still pulling 25+ % under boost.