So I'm gonna be getting my motor rebuilt on my s4, and I wanna know, swapping to s5 rotors... is it as simple as installing the rotors, or are there other complications i'm not aware of? How much of a gain would I get from that alone?

 

You need the appropriately weighted flywheel and proper fuel for the different compression ratio.

 

proper fuel? You mean A/F ratio?

 

You need the proper front AND rear counterweights.
Rear counterweight for lightened flywheel.
Rear counterweight can be substituted for stock OEM S5 flywheel.


-Ted

 

considering this will be done on an all stock 88 convertible, how much of a gain can I expect? will it be worth the costs?