I,M calling 15 hp if your heads are ported correct. Bottom line is the engine changes will only help at Bap and rage at the river type races. I'll take my big shocks over a bigger CC car any day in a real desert race. See you guys in Barstow looking forward to racing there and meeting up.Ryan I do have. 48 idf maybe if I hit the dyno again I will try it? What do u think?