Well, I took the car out again today to try and get my target AFR. I have 33# LS1 injectors which ran perfectly prior to installing a Racetronix pump. Naturally, before the new fuel pump, the fuel pressure was ~58#. After the install of the pump the car runs at 70-72#, which threw my AFR off by nearly a full number, I mean before I had 12.8:1 @ WOT and now it is ~11.9:1 @ WOT. I used the IFR spreadsheet and input the new values but still too rich.
I am to the point of asking for assistance because I am sure the remedy will cost some money so I would like to go the right way the first time.
My first choice is to install an external pressure regulator because I am sick of tweaking a tune that was great before the new fuel pump. Attached is a tune and log to look at but mostly I just need pointed in the right direction.
With this tune it was lean at idle to the point of nearly dying and at WOT the AFR was ok but it was missing/stuttering at high RPM. Never had this trouble before the high fuel pressure.
PLEASE HELP!!!!!
Thank you!!