Well I can say one thing, that my 903 race gas stroker @ a legit 210 hp at Cooke city up a nice hill would run dead even with my friends boondocker dragon @ 12 psi, multible runs switching riders ect ect, (both sleds aprox the same weight) on flatland drags the 903 would leave the turbo for dead at the hit then the turbo would reel it back in and win. Now granted the 903 motor is a full race vp C14 only deal ect ect vs av gas built dragon motor so not really fair, but having had turbo and big bore/strokers at some power level the turbo is pretty much for sure the way to go as the race gas death n/a motor it total fun but a HUGE pita to keep running perfect.......this is all just my opinion on the thing, feel free to agree or disagree lmao