Ok I need more power, I have the roush 427r. If I change the pulley on the supercharger, I obviously need to change it back to stock when I go in for service, is this something I can get away with? The roush has 5psi of boost? By changing to a smaller pulley this will increase boost? Is that correct? How much can I increase and still be safe without harming anything?One more question..... is the money worth the 4:10's, or is there something else I should do first? Thanks for the help.......

 

I don't know about the pulley but the gears areworth the money.

 

Thanks for the input......

 

the smaller pulley will increase your boost. the gears are a great mod to wake up your car...I will not do them as in my setup it would make 1st gear non existent and traction will be tough to get on the street....good luck

 

Not sure about the Roush but the Saleen feels good at 10 psi. 3.4 pulley is right under 10 psi of boost.
4.10's are definitely worth it. They will increase your rpm when cruising but I feel are well worth it.
But with the increase of boost you'll need a new tune and will be a pain to swap the pulley everytime you need service.

 

I would be worried about tuning up the wick too much with a non-intercooled setup??

 

Roush is intercooled.

 

OOPS!