or any benefit to use turbo rotor on n/a motor? I know turbo housing give better exhaust flow on n/a motor.

thanks

 

its often said that the diffuser in n/a housings doesnt have much, if any, negative effect. i know of no one who has proven this either way.
if losing horsepower is a benefit. the s5 n/as had the lightest, highest compression ratio rotor.

 

are you wanting to switch out the rotors? wouldnt that cause power loss by decreasing the compression?

 

Yes. The NA rotor is of higher compression then the TII rotor. 8.4 (S4 TII) vs. 9.4 on the S4 NA.

So you will lower compression, thus making less power. The turbo rotor housing is better because of the lack of exhaust diffuser, but you can grind this out of your NA housing.

 

thanks, mine is s5 n/a. I am thinking about to have rebuild. it seems like better use s5 n/a rotor with turbo housing.