The extra heat in the exhaust goes right along with some basic laws
of nature dealing with thermodynamics, that energy could have
been changed to mechanical work and better gas milage would
result. But I degress (now that I am degreased and on the computer)...
Many many years ago my brother bought a Mazda R-100, the first
rotary in america I think, and I borrowed it for autocross. These were
my first autocrosses with the Ohio State Sports Car Club. Won
my class, and the car was amazingly fast for its day, and rattle
free. Soft and tippy handling though. That one autocross
(and I was careful not to exceed redline, but touched it many
times) destroyed the tip seals, so next morning the car would
not start. Several cans of starting either, and pushing it up to
30 mph and she finally started, with giant clouds of smoke.
But, Once warmed up, the car ran OK. We immediatly drove
to a used car lot and traded it in on a 6cyl 3 on the tree
Ford Torino (a no option dog the used car salesman
could not believe he had the luck of unloading)...and got
a great price for the Mazda.
Dont know what became of it, but my brother saw it sitting
there for quite a long time. The early rotarys were very
bad for tip seals.
Best Regards,
Jim
Chesapeake Va
67 pushrod 2L 5spd
72 510 sportwagon
----- Original Message -----
From: datsunmike
Sent: Monday, May 20, 2002 7:13 PM
To: Daniel Neuman
Cc: Thomas - Sweden; Jimmy Claypool; marcs@misresourcegroup.com;
datsun-roadsters@autox.team.net
Subject: Re: engine swaps
I had a 85 GSLE with the 13B and the mileage was terrible and the car wasn't
nearly as fast as my 240. I got 18 mpg on the highway and even less in the
city. I brought the car to a rotary expert and he said it was normal. Plus
the engines are usually wasted at about 80,000 miles as the apex seals die.
510s don't have frames under them so it's easier to play with.
Mike
----- Original Message -----
From: "Daniel Neuman" <dneuman@quark.sfsu.edu>
To: <datsunmike@nyc.rr.com>
Cc: "Thomas - Sweden" <csp311@telia.com>; "Jimmy Claypool"
<srl311vg@hotmail.com>; <marcs@misresourcegroup.com>;
<datsun-roadsters@autox.team.net>
Sent: Monday, May 20, 2002 6:37 PM
Subject: Re: engine swaps
> Hello,
> Well i know that there are several 510's with the 13B turbo engines
> in them. So I know thats is possible. Isn't the 'bad gass milage' sorta
> untrue? If you look at them in a mpg/hp sorta way don't they do okay?
> Daniel 69 2000
> Oakland CA
>
> > Unlike regular engines that have cams that ramp up the closing of the
> > valves, rotaries have ports and the rotor opens and closes on the ports
> > without the ramp and hence the loudness of the motor. Kinda like a door
> > being slammed shut.
> >
> > Rotaries as Tom mentioned have very high exhaust temperatures and custom
> > headers and a very heavy exhaust would be required as well as a muffler
that
> > can withstand the temperatures.
> >
> > The crank center is also very high as compared to regular piston motors
and
> > the motor would have to be set lower in the frame to get the correct
> > driveshaft angles.
> >
> > Great engine when port work is done but stock they're basically dogs
except
> > for the Turbos. Horrible gas mileage also.
> >
> > Mike
> >
> > ----- Original Message -----
> > From: "Thomas - Sweden" <csp311@telia.com>
> > To: "Jimmy Claypool" <srl311vg@hotmail.com>
> > Cc: <marcs@misresourcegroup.com>; <datsun-roadsters@autox.team.net>
> > Sent: Monday, May 20, 2002 2:01 PM
> > Subject: Re: engine swaps
> >
> >
> > > Rotary engines run hot. You would need a muffler
> > > filled with lava rocks to withstand the heat if you
> > > go racing. The non-turbo's are really loud. I think
> > > an old IMSA racing RX-7 tested 125 dB in an
> > > Road & Track magazine.
> > >
> > > Thomas
> > >
> > > Jimmy Claypool wrote:
> > >
> > > > The big issue with a rotary and especially a turbo rotary is the
> > exhaust. It
> > > > exits the passenger side and can reach in excess of 1500 degrees
maybe
> > more
> > > > with a turbo. Otherwise I would be all for it. Compact design and
easy
> > ways
> > > > to make big power. I have seen NA motors put out 250hp easy.
> > > > If you find a way to keep from melting your passenger feet to the
floor
> > let
> > > > me know. I am considering building an E mod autocrosser and would
use a
> > > > turbo rotary but theres no passenger seat in the plans so no worries
> > there.
> > > > there might be a way to make a sheild to go between the body and the
> > > > exhaust??? Just a thought
> > > >
> > > > Jimmy
> > > >
> > > > >From: "Marc S" <marcs@misresourcegroup.com>
> > > > >Reply-To: "Marc S" <marcs@misresourcegroup.com>
> > > > >To: "ROADSTER" <datsun-roadsters@autox.team.net>
> > > > >Subject: engine swaps
> > > > >Date: Mon, 20 May 2002 10:46:55 -0500
> > > > >
> > > > >Would any of the turbo rotary engines work
> > > > >
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