Ok so I know that I have a lot to learn with tuning this thing. I have a 2005 GTO that I recently installed a set of ported 243s, FAST 90 and a custom sleeper cam (226/230 118+2 LSA) .598/.607 lift -8 overlap. The car is catless but has stock manifolds (sleeper lol) The car starts and sounds and drives like stock. I do have a wideband and after some tweaking it is in the safe 12.6 range at WOT. I have not been able to go drive around and mess with STFT or LTFTs. The car is perfectly driveable but it breaks up at the top of 1st gear around 6000 rpm. It only does this in 1st gear and pulls clean in the rest. Injector duty cycles are pretty high and I'm waiting on a some injector adapters to install my LS9 injectors that I have. The MAF drops off the chart and feels almost like a rev limiter or valve float. I have a friend that is a lot more knowledgable with HPtuners that is going to look at it this weekend, but I just thought I would throw this out there and see if I got any ideas before he came. I did clean the MAF with cleaner to see if that helped but this did not help. I have attached my tune and a datalog of a quick run. Thanks for any help or advice guys.
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Originally Posted by DSteck
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