browney

If you have a TII engine running NA with a carbie, how difficult/expensive is it to swap the rotors over to say, s5 NA rotors? How much horsepower do you think there is to be gained?

Thanks

Jeff20B

iTrader: (13)

Someone said it's about a 5HP gain to go with higher compression S5 rotors.

browney

I guess it isn't worth the money then. I am supprised it is this that small though as this is from low compression (I think 8.5:1) to the highest compresion (I think it was 9.7:1)

hornbm

yeah I'm not too sure about those numbers. Pineapple racing told me there was a 5hp gain from S4 N/A rotors to S5 N/A rotors. (9.4:1 to 9.7:1), so I think there has got to be a bit more than 5 hp from going from TII rotors to N/A rotors.

browney

How difficult/expensive would it be to so the swap? Do you guys think it would be worth it?

riffraff

well you would have to completely tear down and rebuild the motor... so the only question would be is it worth doing that..

the hardest part will be finding a good pair of s5 rotors...