Seattle_mazdaspeeddemon

iTrader: (2)

I have a S5 na rx7 and were looking for rotars. Will the rx8 rotars fit and work in a S5 na motor with S5 turbo housings? Would there be any preformance added to the motor Or do I need to stick with the S5 rotars.

SpeedOfLife

iTrader: (16)

It's spelled 'rotor'. The compression ratio is probably different, and if so then you can't just swap them in without making fuel adjustments and probably timing adjustments, too.

Aaron Cake

iTrader: (1)

Plus the RX-8 apex seal grooves would need to be machined deeper to accept 2nd gen apex seals.

RX-Spec7

s5 rotors are 9.7: 1 compression ratio and the rx-8 rotors are 10:1 comp ratio, you could machine them to fill depth 2mm so you can use the earlyer seals or you could just use the stock rx-8 seals which actually seal really well. the side seals on the rx-8 rotors are also different they are a little fater and tapered, so if yo are going to use the RX-8 rotors you might as well just use the stock apex seals and side seals