Hi everyone! Obviously ths is my first post, and I want to thank all of you for the information that I have obtained from this site:SNSign:. Here is my issue, hopefully someone can give me a detailed explanation to help me resolve my problem:
I recently bought an 89.5 mustang gt. It has a 331 stroker, AFR 185's, 42 lb injectors, Trickflow intake, Accufab throttle body, and other odds and ends. The car was almost impossible to drive when I first bought it. I have tuned it to the point that it behaves for the most part. Originally the fuel pressure was set at 42 psi with a Holley AFPR, and the timing was set at 16 degrees. The car was very powerfull, but misfired from 3750 rpm and up. I knocked down the timing to 14 degrees, and lower the fuel pressure to 38 psi. The car is lower on power, but it doesnt sputter any more. Obviously, I need to get a dyno tune, but I can't take any time off of work for at least 3 months to accomplish this. My first question might be a dumb one, but I want to double check. At idle, with no vacuum, the fuel pressure should read around 38 psi. With the vacuum line in, the pressure should drop a little (1-3 psi). Is the fuel pressure supposed to drop even lower at WOT?
I recently bought an 89.5 mustang gt. It has a 331 stroker, AFR 185's, 42 lb injectors, Trickflow intake, Accufab throttle body, and other odds and ends. The car was almost impossible to drive when I first bought it. I have tuned it to the point that it behaves for the most part. Originally the fuel pressure was set at 42 psi with a Holley AFPR, and the timing was set at 16 degrees. The car was very powerfull, but misfired from 3750 rpm and up. I knocked down the timing to 14 degrees, and lower the fuel pressure to 38 psi. The car is lower on power, but it doesnt sputter any more. Obviously, I need to get a dyno tune, but I can't take any time off of work for at least 3 months to accomplish this. My first question might be a dumb one, but I want to double check. At idle, with no vacuum, the fuel pressure should read around 38 psi. With the vacuum line in, the pressure should drop a little (1-3 psi). Is the fuel pressure supposed to drop even lower at WOT?