[DMCForum] Re: HEY RICH, rotary engines
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[DMCForum] Re: HEY RICH, rotary engines

Hey thanks for answering back.

I didn't think the PRV weighed that much. Quite a suprise. I read
that rotary engines are not quite as fuel efficient. The article may
have been out of date. Do you find this to be true?

With half the weight, even a 3rd generation 13b vs. the 20b would
probably make a DeLorean fly. I'm curious as to why you didn't use a
Mazda transmission since they are obviously built to accept this
engine. 6 gears is really cool though. The RX series didn't have 6
speeds did they?

With no timing belts or chains, do you even have to set timing on a
rotary engine at all?

Thanks for being so thorough with all the information. I hope to see
you and your car in Pigeon Forge.

--- In DMCForum@xxxxxxxxxxxxxxx, Jim Strickland <ihaveanaccount@xxxx>
> Not really ignoring you (or no more than usual for that matter); i
> thought I'd get some numbers from someone who would really know-
> been working with rotary engines for 20-something years.
> He said a run of the mill 13b weighs about 250lbs for a complete
> functioning engine.  I would have said the same- 250 to 270 lbs
> two people can move one around pretty easily. 
> He said the 20b weighs 340lbs.  If you add in the weight of the oil
> cooler/ intercooler, etc, it's closer to 380-400 lbs.  I think the
> weighs in at around 400lbs.  I recently found that the complete
> weighs 470lbs with all the stuff on it. 
> 13b's have come turbocharged and non turbocharged.  I believe the
> 13b was in the first generation RX7 in 1985.  It was 135hp.  It
went up
> to 160hp by 1989 in the 2nd generation rx7, turbocharged 2nd
> versions had 200hp.  The 3rd generation rx7's had another iteration
> the 13b, this time sequential twin turbo and 255hp for all 3rd gens
> (93-95). 
> 13b's are pretty easy to get i think- still in a car.  The 2nd
> cars are really cheap now though.  3rd gen cars have held their
> pretty well.
> I was actually looking for a 3rd gen 13b engine (complete with
> computer, etc) when i found that the 20b was more
> attainable in that condition (believe it or not).  It was more
> though. 
> My transmission is the g50 from a 1995 porsche 911 c2 (993). 
> engineering (kennedyeng.com) made me an adaptor from the 20b to the
> porsche transaxle, and saved me a huge headache.  It really did
just bolt
> right up.  I also got a flywheel, pressure plate, and starter from
> It was an arm and a leg though- the stock porsche starter costs
$600 new!
> You are right that the pictures on ebay are not very good unless
you know
> what you are looking at.
> my website is at http://www.eliseusa.com/rotary.htm .
> Jim
> On Wed, 28 Jan 2004 13:19:02 -0000 "cruznmd" <racuti1@xxxx>
> writes:
> > Jim,
> >
> > How much does a 20b weigh? A 13b? How much does the PRV weigh
> >
> > Can you get a 13b that is not turbocharged? How much horsepower
> > they generate that way? How rare are the 13b's?
> >
> > What are you using for a transmission? If your transmission is
> > stock,
> > how did you mate them up?
> >
> > I understand the very basic principle that rotaries operate on
> > when I look at the auction picture I can't see it.
> >
> > Don't you have a website about your car? I forget.
> >
> > Thanks,
> >
> > Rich A.
> >
> >
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