Need some assistance on where to set my fuel pressure.
I do have an AEM wideband so I'm sure of the AFRs
This is an '86 Daytona with a custom intercooled log setup (stock intercooler in a stock location) with a FWD Perf Stage III cal. Injectors are 804s (filed to fit the stock fuel rail) and I have an AFPR (Acufab).
I've been trying to fix an over rich problem (I guess I think it is a problem and you all can tell me). When at full throttle but pulling a hill or under load the thing is pig rich (10.0). I've been pulling base pressure using the AFPR. I had the base pressure at 48psi.
Full throttle runs are great. The AFRs start in the high 10s to low 11s and never go above the low 12s before I shift (around the first red light on the digi gauge or less).
Today I bumped the base pressure down to 46psi. Under load on a hill at full throttle the AFR goes down into the 10s but not to 10.0. But.....
When at part throttle as the car transitions from vacuum to boost the car goes super lean (17.0 or ---, the dashes meaning off the scale). Then, once the car hits 5lbs or so, the AFRs come back down. As the car is doing this if feels like it hits a wall until the fuel kicks in and then it is off again.
I hate the part throttle response.
I don't know what to do. If I bump the pressure back up then I risk washing down the cylinders with too much fuel when I'm running in hills (which is often). If I keep the fuel backed down like this, the car is a PITA to drive in city traffic (which is often).
Does the LM only look at boost/vacuum to determine fuel? I'm guessing no. And that means it is probably using the TPS too. Could the TPS be slightly off? I've got a spare. Maybe I'll throw it on today.
Opinions? Help?