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and dont put it on a mustang dyno unless you want accurate power numbers
Fixed it for you. You guys should stop spreading misinformation. Mustang dynos are very accurate but people tend to not like them them because they tend to give lower power readings than DynoJet dynos (lower numbers doesn't mean that the higher numbers are actually accurate).
Put it this way: If you go to two different dynos, and get two different sets of output graphs, chances are good that one of the dynos is not accurate. If one of those dynos is an inertial unit, that would be the one I'd mistrust first.
thanks guys but not the dyno and not the tunner. both are great it look like i have way 2 big of cam in my car and tryinng to get ride of them now for some pro1's. and yes mustang dyno are probably the most accurate dyno out there. people dont like them cause they hurt feeling. if i put my car on a dyno jet im sure to see like 450 but i wanna c 500 on a mustang dyno. but thanks guys for some help. my first turbo build. u live and learn bigger is not always better.
I know that there was a thread on Honda-tech.com about the Skunk 2 pro cams and the difference in power they made vs stock cams ect. The thread was done by Jeff Evens, hell I would even call him to see if your idea that the cam is to big and causing you to loose power.
Hell this is an option find a set of GSR cams put them in and give it another shot on the dyno. With out the specs of your build it is hard to say what the issue is.