2002 Roush stage 2 mustang crank, rod, piston upgrade.
I have a 2002 stage2 Roush it has a 16 valve 4.6ltr. Roush engine. I was told that this means it came with Roush heads, intake, etc. I don't know for sure if it is any different from a regular stock 4.6. My problem is, the Roush supercharger it came with has been replaced with a much better kenne bell supercharger. The kenne bell will supposedly boost up to 30 lbs., but it has a pulley on it that boost only 10 lbs. A good friend of mine that does a little bit of engine building said the reason it has that pulley on it is because the stock crank, or bottom end is only rated for up to 450 horsepower. He said he knew the person who owned this car before me, and a couple of years ago he had the kenne bell supercharger installed and dyno tuned for the supercharger, and said at that time it showed 525horsepower at rear wheels. He had it programmed to cut the fuel at 5700 rpm. Does this sound right? Or can I put the pulley on that it needs to boost 30 lbs. Without blowing out the bottom end. If not what do I have to do to be able to run the supercharger as high as it will go. I've never had or even took a ride in a fast car till I purchased this car back on the Friday before memorial day a few months ago. I never had it dyno, but I know it has whatever gear comes stock, and the other day a guy took me for a ride in his stock gt. It's the one that had the 302 before they changed them to 4.6. I couldn't believe how slow it was. It felt like a Ford crown vic compared to mine, and it wouldn't even smoke the tires in 2nd and3rd just by pushing the peddle half way. It would only spin in 1st and you had to floor it and dump the clutch. If u did that to mine I believe it would send u straight to the funeral home. Can anybody tell me what's up?????