Damn screaminjoe, now I am confused. I've been doing research on ECU upgrades and pulley upgrades for several weeks. I've talked with Renntech, Kleeman and Evosport about this subject and they are telling me just the opposite of what you are. I'm not telling you that you are wrong, because when it comes to the newer generation hot rodding up cars I've never done it. Now give me an old 60's car and I can gitter-done. All of these companies I mentioned have dyno sheets to prove that their #'s are right, all three of them are telling me the same thing. They all have told me that just the ECU upgrade will gain only around 10 to 15 h.p. & just doing a pulley upgrade will gain about 30 hp, and if you do both you should gain around 45 hp.