Byron Ward wrote:

You mentioned to me before that I might
get 70-80 hp turbocharged and direct drive. Do you think this is possible
with this engine?

Yes but I don't think you can get a low compression rotor for a 12A
so only modest turbo boost like 5 psi would be advisable. I think you would
have trouble getting 70 HP at only 3000 RPM with only a 5 psi boost.

Paul this is from a previous question I asked you. I was following links
on your website and noticed that on Craig Pugslys page he mentions a 12A
turbo, sold only in Japan, maximum boost of 6.2 psi with 8.5:1 compression
ratio. Does anyone know if it is possible to get rotors from this engine
here in the U.S.? If so would it feasible to get 70-80 hp with
a one-rotor turbocharged and direct drive? Do you think it is possible to
get 70-80 hp out of this engine in any form (turbo or NA, PSRU or direct
drive, etc) while keeping the weight under 200 lbs?

Thanks,

Byron

I don't know about the rotors but Charley Airesman had his direct drive Variez 
soob powered at OSH. He used a long shaft extension to get the small 54 inch
prop way out back of the airplane in real clean air. 
He was claiming 230 MPH  from a 2.5 L single overhead cam soob.
He also claimed four gallons an hour fuel burn at 200 MPH.

At a BSFC of and a weight of fuel at six pounds per gallon:
BFSC    HP
0.38    63
0.40    60
0.42    57
0.44    55

Pick one of the above. 

He was running it at 3650 RPM as I recall.

I think 70 to 80 HP direct drive with high boost would be possible on a 
one rotor at low rpm's around 3500 to 4000.
 
Paul Lamar
 
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