I am thinking of picking up an FD and I have a s5 TII engine I got for free in my garage and I was wondering if I was to get an FD if I rebuilt the engine could I use any of the s5 parts could I jack the compression up to a safe level to boost on but still have a power gain? I also have noticed people using rx8 e-shafts in FC's and I was wondering if it would work in an FD and if it did are you still loosing the pound or so like you are in the FC?
Thanks

 

You're thinking of N/A rotors. S5 TII are the same weight ad compression as FD rotors.

All e-shafts 86-95 are the same, so yeah you still save the weight... but it doesn't much sense unless your e-shaft is toast.

 

Thanks alexdimen. Does anyone know what the comp. would be when using na s5 rotors?
Thanks

 

My old car had those. If you do a search you can find my dyno thread. (it's in my sig)