Hello all, first-time tuner on a 6.2 L92 swap into a 79 Jeep Cherokee Cheif. Running a Texas Speed VVT stage 1 cam, LS3 intake and injectors, LS7 MAF in a custom intake. 2.5" dual exhaust with high flow cats and an H-pipe.
Currently working on getting my MAF dialed and I have the low-frequency table pretty dialed (HF needs work.) I am seeing a bit of knock retard between 1,500 and 3,000 RPM. I've done some timing tuning to try and stop it, but at this point, much of my table is lower than a stock 6.2 corvette that I'm using for a comparison file, and I'm still seeing 1-2 degrees of KR in my logs.
Is there something I'm missing? VE is disabled, and the KR doesn't seem to correlate to A/F beside the fact it doesn't happen at all in PE.
Also, can anyone recommend a good mail-order tuner to help with this stuff? I've tried one already and communication has been less than stellar...
cheif log timing way down.hpl
part throttle knock edit 5.hpt
advance.PNG
knock retard.PNG
LTFT.PNG
STFT.PNG