fuel pressure

[rick@northatlan]

I just installed an adjustable fuel regulator. Can someone tell me what fuel pressure to set it at. Im planning on running 18 psi boost with down pipe w/external wastegate, full 3 inch dual exhaust, better intercooler, cold air kit and larger throttle body and moddified upper plenum. Again, what is the base line fuel pressure with vacum off to regulator?

 

[1BADWE4T]

What chip are you using? Most recommend starting at 43 psi, line off.

 

[turbojd]

What chip are you using? Most recommend starting at 43 psi, line off.

X2

 

["Turbo-T"]

If you have a turbo tweak chip, it says to set it at 43 psi WITH THE VAC/BOOST LINE OFF.

Then if you get a fuel PSI gauge verify the fuel PSI goes up 1 psi per lb of boost.

 

[GNDriven]

Did you upgrade the fuel pump as well?

Get a fuel pressure gauge and see that you fuel pressure clims 1 PSI to 1PSI intake pressure.

Don't just belive the pump is going to be capable. Get a gauge and check it, this has burned a lot of good motors.

Just My Guess (JMG)

 

[bmackinnon]

Did you upgrade the fuel pump as well?

Get a fuel pressure gauge and see that you fuel pressure climbs 1 PSI to 1PSI intake (boost) pressure.

Don't just belive the pump is going to be capable. Get a gauge and check it, this has burned a lot of good motors.

Just My Guess (JMG)

couldn't have said it better.... base (line off) pressure is usually 43 psi as the guys said above....

 

[87GN_70GS]

Just got back from the dyno. Dyno and Turbolink numbers said that it liked 52 psi base the best.

 

[bmackinnon]

Just got back from the dyno. Dyno and Turbolink numbers said that it liked 52 psi base the best.

Yikes .... that's awful high for a base.... better have a GOOD pump on there to supply the volume at, say... 20 psi boost = 72 psi fuel pressure.... what chip are you using? what injectors? correct me if I'm wrong, but I don't think turbolink will give you the injector duty cycles... somethings definitely not well-matched or 'optimized'... that's too much base fuel pressure....

BTW.... Dyno? Huntsville? where would that be? I live in Guntersville..... just curious.....