[eLeSthree]

Originally Posted by IKILLEDSUPERMAN_ZL1

Tuner said it has no more then 15 degrees but FrankT looked at my tune and said it had 21. I did tell the tuner I had DSX flashed my FPCM to stop the drop in fuel pressure. Redflag right there that I had to send it off to get it flashed elsewhere. Before it was dropping to 50 from 58 psi. Afterwards it held steady at 58+ The tune wasnt touched after getting it back from the tuner. Yes I will not be going back to the same tuner.

Ok hold on.

1. Did Frank see a log file?

2. The stock fpcm commands 58psi at idle and slopes down to 48psi (iabout) by redline. So your fuel pump was capable of supplying the commanded fuel pressure. The ZL1 fpcm tune file tells it to hold 58psi all the way to redline, instead of dropping off to 48. That is probably why your tuner didnt “waste” a credit on flashing the fpcm. You didnt need it. What size injectors do you have? My buddy ran ID1300x2s with a zl1 pump and a bap (no fpcm flash) on E85 upto 830whp. The fuel pressure dropped to 48psi AS COMMANDED and it Didnt matter cause his IDC was 67%.

Anyway, carry on…. GLW your project.