David Sowers wrote:

Hi

I'm new to this mailing list and digging in.  I'm on a lower budget and
want to build a BD-4 with a Mazda Rotary.  I like the rotary for its
simplicity and power to weight ratio.  For starters I want to rebuild
the engine myself and want between 180 and 200 HP.

I think that I will go for a non-turbo version for lower complexity
levels (tell me if I'm wrong) and lower maintenance.  I plan on getting
the book from www.rotaryaviation.com as well as the overhaul video.

What year engine should I try to find at parts recyclers etc?

Do I need to get a Turbocharged model to get the HP that I want?

Any Help will be greatly appreciated.

Thanks

Dave Sowers

180 HP at 6000 RPM should be possible with careful porting and intake manifold
design. 200 HP normally aspirated is possible if you want to go to 
peripheral intake ports or go with a 2.85:1 PSRU and run the engine
at 7000 RPM for takeoff. You might try and find a used Ross 2.85:1 PSRU.
It will probably need some modifications.

Stay away from the junkyards if possible. You rarely get a bargain
there. Try and find a 1989 or later 2nd gen RX7 and buy the whole
car with a running engine. That way you are sure to get a lot of useful
parts. Junkyard engines are usually sans a lot of needed parts like 
coils, intercoolers, starters, high pressure fuel pumps, injectors, 
oil coolers, etc., etc. etc..

Paul Lamar
 
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