1999 camaro z28, 6.0 lq4, 243 heads, LS1 intake, TB, MAF, 40 lb bosch injectors, 255 lph pump, medium cam 224, 232 @ .50, headers, good exhaust. The car runs great on the street, great driveabilty and makes great torque and power to 5000 rpm. At the track, 1/4 mile is good (12.6 112mph) but it doesn't seem to pull hard to 6000 rpm like it should with this setup. Logs show that AFR goes richer than commanded after 5000 rpm and I can't seem to resolve it. I've attached a log and tune, the log has a full throttle run through to fourth closer to the end. The likeliest suspect for me is the injector data but this seems to only be a WOT high rpm problem, the rest of the time everything is great. MAF and Dynamic air flow are very close so i'm confident in the MAF and VE values. Any thoughts and suggestions would be a great help.
aug 6 2020 a.hplCamaro Aug 2 2020 6.0.hpt