do s5 rotors offer a worthwhile gain in an s4 engine???
Thread Starter
Still learning
Joined: Dec 2003
Posts: 638
Likes: 0
From: Elk Grove, CA
do s5 rotors offer a worthwhile gain in an s4 engine???
im gonna have an s4 NA engine built pretty soon, and i was thinking about using s5 rotors in it, but the guy who is gonna build the engine said that they dont really offer much of performance gain. is this true? i searched and didnt find a definitive answer.
Banzai Racing
Joined: Aug 2001
Posts: 2,632
Likes: 3
From: Indiana
The S5 rotors are lighter and have a higher compression ratio , they will yield more power. How much, depends on porting and the other supporting mods. The lighter rotors have less reciprocating mass which frees up power and allows the engine to rev quicker. To build it with an S5 internals you will also need the front conterweight and flywheel for a balanced assembly. The lighter S5 flywheel will also free up a little power.
