I just built a motor for my car, bored 40 over with the e 303 cam gt40 heads ported and polished, cobra intake ported, and 30lb injectors with 76 mass air flow to go with injectors, car ran like crap real slow, I bumped up fuel pressur to 40psi and the timing to around 20. car started to run alot better but still needs impovement, how much fuel psi can i run and where should i start with the timing? am I stupid to try getting 25-30 out of it? Another stupid question can I drill the hole bigger on the butterfly on the stock throttle body so it will idle right so the IAC will read more air flow? Any advice on getting my car running right would be cool...Thank you!