Fuel Pressure and Fuel Presure Regulator

[95Blue240sx]

i was just wondering the stock fuel pressure on a ka. and can we change the the fuel pres regulator to an adjustable one?

[Jeff240sx]

Yup. You can change the regulator. Stock pressure is 43psi, I think.
-Jeff

[95Blue240sx]

where is the regulator located?

[Jeff240sx]

At the end of the fuel rail.
-Jeff

[95Blue240sx]

what about install? ive never seen one for the KA. if i got a universal how would i hook it up.

[d240t2]

If you got a universal one...you'd need to fab up an adapter to direct fuel to the new reg, that will bolt on in place of the old reg. Basically, just a hose connection on a plate, with the right holes.

Nismo sells an FPR that bolts onto the rail. JWT carries it.

Why do you think you need an adjustable FPR?

Stock FPR is 43.5 (3 bar). You have to measure that with the reference port disconnected. With the ref port connected, it'll be about 35 at idle (since the engine pulls about 8psi of vacuum, shown on vacuum gauges as 20 inches of mercury). I have never heard of a stock FPR going bad.

Dennis