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For 10 years I have driven a 1993 RX7 with modified single turbo @ 350 HP on the dyno. For 4 years prior to that I drove my 1996 Trans Am with an 8psi inter-cooled blower kit for from http://www.procharger.com/which was very effective and reliable.

I am currently building a BD-4 and I hope to use a 2 rotor rotary to have 200 to 225 HP which is supposed to provide nearly a 200mph cruise speed.

I look forward to ideas from your news letter.

Has anybody used a serpentine belt drive centrifugal supercharger on a rotary? I have experience with that type kit for my 1996 Trans Am from http://www.procharger.com/which was very positive. I think a similar setup could be bolted onto the rotary at less weight than the turbo hardware. I would move the throttle body to the centrifugal supercharger (compressor) suction rather than between the intercooler and the engine. Throttling a belt driven centrifugal compressor suction is much more desirable than throttling the discharge. No Blow Off Valve should be needed. The fuel injection system can still be controlling via mass air flow sensor that would function as it always does in a normally aspirated engine or even a turbo engine. This setup would be great for extra take-off power and also altitude compensation (forget about decreasing power with increasing altitude.) Controlling power would be manual throttle and manual monitoring of the
manifold pressure just like pilots normally do.

Can't throttle a turbo driven compressor suction because the spool would over speed.

I understand my idea would be less fuel efficient than the turbo because the turbo does, in fact, recover significant energy from the exhaust gas flow, while a blower does not. I have time to ponder that some more.

I have seen articles with the screw type blower or roots type blower on the rotary, but don't like that setup because it usually excludes the possibility of inter-cooling.

I love all the reference info and tech analysis on your home page.

I look forward to reading your news letter.

Thanks,

John Lindinger


NA p-port will give you 250 HP at 7500 RPM  with a 2.85:1 PSRU with out super charge
or turbo.


There is nothing wrong with a turbo IF you install a Garrett turbo tach
and keep the turbine under 80,000 RPM. A combination of continuous high  exhaust heat and high RPM cause turbine blade failure. Especially at alitidue were back pressure is
lower.

I did the spoiler package way back in the early 1970's on the Transam for Pontiac :)
I also built a mid engine version for Pontiac. Herb Adams is still around.

http://www.rotaryeng.net/who.html

Paul Lamar


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