When I first start my car, my fuel pressure is at 50. After I drive for a bit and stop and check the fuel pressure again its down to around 40. Is that normal?

TIA

If you are using the Hahn turbo kit with the supplied Cartach FPR, then yes, its been known to happen once or twice, or all the time :) As long as it stays between 45-55 psi at idle, you should be just fine, as the ECU will compensate for pressure changes. Just dont let it idle to low, like 30 psi or anything..(stock injector size anyway)

Yeah, it pretty much does it all the time. I set it at 50, then next time I pop my hood it is at 40. Mabye ill try to get it to 55 so it drops to 45.

Oh well thanks for the input.