Originally Posted by Lh3211986
I have an 86 GT stock with a turbo kit. I'm running 42# injectors, 255 fuel pump, 8psi of boost, pro m MAF for 42#, 10 degrease of timing and a burn chip for the A9L. In order to get my A/F right it needs over 60psi of fuel.... Is there something wrong?
Either your fuel lines or injectors are not moving the "volume" of fuel you need.
To lower the pressure you have to increase the volume to ensure the engine gets enough fuel.
There is a "Fuel Injector Sizing" link in the Useful Mustang Info
If you find that your injectors are sized properly, then you will likely need to upgrade your fuel supply lines and fittings.
I will be using 60 lb injectors, 1/2" ID fuel rails and an AFM 340 LPH fuel pump to feed my SC'd 306. I may still have to upgrade the lines from the engine to the tank to a larger size, depending upon how much power I make and the fuel needed to make it.