BlastinSideways12A

I'm building an NA setup right now with TII irons and rotor housings and using 9.7:1 or 10:1 (renesis) rotors. I plan on streetporting the engine and running it with a standalone. Anyone here done something like this and how did it work out? I saw the dyno sheet of the streetported S5TII block with TII rotors posted by Kahren, just wondered if anyone else has built a streetported NA with TII housings. BTW, its going into a lightened first gen with 4.88 gearing so it will have plenty of torque as an NA.

adrock3217

The Renesis rotors, unless you have time and patience...don't bother. You'd need to (expertly) mill the apex slits for 2mm seals, as our engines, unlike the Renesis, DO have things the seals could snag internally...

.3 is not worth it, IMO. Not to mention needing to re-balance the whole assembly, as I'm sure the Renesis E-shaft is lighter, redesigned in some way, and you'd need a new counterweight. Just not worth it.

Go with the S5 NA rotors, you'll be happy :-P

BlastinSideways12A

I did know that the apex seals weren't usable but I didn't realize that machine work was necessary. I do plan on having the rotating assembly balanced and the rotors clearanced anyway... I want to bevel the edges of the rotors for more timing so i'll need to rebalance everything. I also don't want to worry about seeing 9000 RPM from time to time. Still debating whether to use my S5 NA stationary gears or to use FD gears, or renesis ones. Although I will be using TII intake manifolds initially, I plan on using a more NA/RPM oriented setup eventually so the high revs are very realistic. I also have the RB streetport exhaust for the FB but I will eventually build my own exhaust to tune the collector position to the RPM level that I want the most power from.

rarson

The thing is, Rensis rotors are a lot cheaper than S5 rotors, unless you can find them used for a good deal. Not to mention, they are lighter.

I'm not saying you should bother with them, but there are some benefits...

Edit: Oh and the Renesis rotors are already bevelled.

BlastinSideways12A

I've settled on using S5 NA rotors but the engine is on the back burner again... need to change the timing belt and waterpump on my daily driver. (96 Probe GT) I can't wait to drive a rotary car again...