Well I don't know about other tuners out there, but for my area the P6 is working out great in this engine. Glad I put my order in when I did, due to Tower now having the next shipment in by late September. I let the piston and sleeve soak in the oil through one rich tank, then allowed the engine to spool through a pretty lean racing condition setting. I could not even remember what the settings are at, but my estimate is that the low is turned in almost at 3/4 from std and the high has to be about 1-1/4 turns from std. factory settings. It runs great low, mid and high, with a little smoke blowing out of the dual chamber pipe around corners and more off the straight. The temp for the head here in Texas is reading around 219-222 under racing conditions with a lean setting. Good luck Sean, hope you learn to tune to your benefits. Just as a test I ran the engine through half a tank under stressfull conditions and then let it idle through the other half of the tank......guess what?.......she idled straight through till the last drop! What a great engine! Hope everyone enjoys this engine as much as I will.