Originally Posted by erm324
Benzy that video proves nothing at all....LM had a smaller pulley on there with meth so that should bring his kit up to the performance of an intercooled 600kit....the 600kit probably only had about 25 more hp, and given the fact that he was on 20inch wheels and HFC as opposed to fully catless like LM I would assume the race would have ended up just like it did.
Even if LM was running the smaller pulley (which I don't believe he was, pretty sure this was before he switched), he's still running the 535 tune. While a smaller pulley will add a few psi to the blower + increase power, he's certainly not getting an additional ~60 HP (540 --> 600) without a higher performance tune.
Also, if a pulley swap can
make that much of a difference, why buy a 625 kit when you can save a ~$3k (catless X-Pipe money), buy a 550 & get nearly the same performance?