I am Essex's buddy with the supercharged Phazer. Yes it was a pain to install, (about 24hrs total) and fuel mileage isnt good.(10-11mpg) Horsepower (more than i planned on). Smiles after an afternoon of taking my time to tune (helmet almost isnt big enough!) Problem is that i dont have a blowoff valve yet, should re-coop the mpgs according to Heath. Track is a 121x14x1 (MEGAPILE!) couldnt get traction before and now its like riding on ice in most snow. Cut down a 121x14x2in to hopefully solve that though. Even with the lack of traction, its BY FAR THEE most fun sled I have EVER been on. Essexy beat me out of the hole no doubt...i was still spinning at 85. More traction, and it will be a way different story. I run 87 and 110 50/50, but im at sea level with a bigger pulley on my s/c. Will report back when I change tracks and blowoff valve. Anyone running Sly Dogs or Gen.1's on their phazer? What do you think?