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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<http://www.procharger.com/whichwas
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
<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
<http://www.rotaryeng.net/who.html

Paul Lamar

John,

Bobby Hughes is running a supercharger on his RX-8 powered RV-10. (He'll
have to provide the details.)  Lately, he's been considering switching to a
turbo, mainly to enable him to eliminate the need for a muffler.

Mark S.
P-port 20B Lancair ES


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