I am sure that I am not the highest HP engine out there but so far I am pretty happy with how much power I have been able to make from an engine built with a bunch of parts I had on hand when I needed to get a motor going before a race.

Rotor and side housings are S3 GSL-SE with a street port on both intake and exhaust. The S3 primary ports are quite small so I had to do a lot of work to match them up to the intake.

S4 rotors, just because they are all I had, I am sure that high compression S5 rotors will be worth more power

S5 intake with electrically activated VDI valve, 5th and 6th ports deactivated and sleeves removed.

RX8 440cc injectors

MS3Pro ECU, with all GM sensors

3 inch inlet from a filter mounted where the pop up headlight would have been to the throttle body, no AFM

Racing Beat header and 3 inch exhaust, need to work on making it a bit more quiet for some tracks.
I have wideband O2 sensors on both rotors so I can do individual rotor tuning, but I haven’t started working on that yet so both rotors are programmed the same.

GM LS2 coils, which are nice, I end up with plug wires about 6 inches long.

When I got everything up and running we went to the dyno, it was a Mustang dyno that is known to be quite conservative in its readings. It ended up making exactly 200hp, I am sure that there is more to be had with high compression rotors, and maybe some less worn out rotor housings. I have a complete S5 engine that I plan to build that should be a good bit better once I get done with it.


Attachment 610829