Which Holley carb do you recommend for the Renesis, if I decide to go that
 route. Not "P" ported.

 --
 Karibian

 Won't work on the RX8 engine unless you go P-port and use the big 2 barrel
 Holley. There is no carb manifold for the RX8 engine to my knowledge. Do you
 have a 4 port or a six port
 RX8 engine. ( I don't use the word "Renesis" because I do not know how to
 spell it. RX8 is easier :))

 Here is some stuff on the big 500 CFM 2 barrel Holley.

 The trouble with the rotary after market manifold situation is there are so
 many variations on the intake configuration that the market is not large
 enough to support separate costly cast intake manifolds for all the
 variations. That is a major reason we support P-ports.
 P-ports work and fit the  same on all 13B and RX8 based engines.
 The side benefit is you get 50 HP more and they are a couple of pounds
 lighter in weight.

 Here is a list of Mazda 2.6 L two rotor rotary engines that all have
 different intake porting.
 13B early 4 port.
 13B 2 nd gen six port. Most popular.
 13B 2 nd gen turbo 4 port.
 13B 4 port Cosmo. Rare.
 13B 3rd gen turbo 4 port.
 RX8 4 port. Now obsolete.
 RX8 6 port.

 Also check out Mazdatrix Holley carbs for early 4 and 6 ports.
 http://www.mazdatrix.com/R-HOLLEY.HTM

 Paul Lamar

 All:
 I'm a "newbie". What is "P-ported"?
 Herb,
 Seminole, FL

 The best explanation is contained in these articles.

 http://www.rotaryeng.net/intake.html

 Read the for sale section of the web site as Jeff Doddridge
 will build them for you.

 Also check out this youtube video.

 http://www.youtube.com/watch?v=NKJ00JsnS8A


 Paul Lamar


 I've got a 2300 500CFM that I'm selling NIB.  The cheapest place is Amazon
 for ~$275.  I will sell mine for $200 plus shipping.  I'm attempting to go
 the gravity route instead so am now looking for a -4/5 carb.

 Todd Archer

 That is a good deal if somebody wants to go carb.



Paul,

Speaking of P. ports.  I can't seem to find the dyno graph data
you did at Mazdatrix a few years ago.  I believe it was Mark's
engine and you had to slap a  carb on because of the time
constraints you weren't able to program Tracy's controller
If memory serves me right,  it put out about 240 Hp at 6500?

Could you resend it?

Thanks

Doug in Japan

We got 264 at 7500 RPM with a p-port RX8 with a weber 58 mm carb
but Dave Lemon said there must be something wrong with his dyno :)

I figure 250 HP minimum.

Mark Suspinski finally got his 2 rotor P-port tuned with Tracy's
EFI but we had to sample the intake manifold pressure
at the oil injector holes with special fittings. See the
web site front page bottom for the fittings. I have
a few left.

The full story is here.
http://www.rotaryeng.net/fund-of-intake.html


Mark S in Austin has his 3 rotor P-port almost running
well with Tracy's system. At least he is flying while Mark
Suspinski's partner ran off the runway on landing and it burned
to the ground. His 747 pilot partner was OK. Why it burned is
mysterious and unusual. Perhaps flying a 747 does not
qualify one to be a tail dragger pilot :) I put a lot
of time and money into that engine.

Tracy is not the only one with these EFI MAP problems.
Our race car has the same problem and it was solved
with a large volume accumulator made from plastic pipe.
The white thing mounted on the right fender well.

A lot of this stuff happened when you were in Nepal I think.

BTW a friend of mine attended the Vans RV flyin recently and both
New Power Sport p-port RV8 airplanes are again flying.
One crashed in a vineyard in North Cal a few years ago and is now
rebuilt and flying. These are high buck, very fast, beauties.
Well over 200 MPH with high climb rates.

Paul Lamar