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

Paul, how do you envision setting up carb heat?  Could that carb be modified
to run inverted as an updraft rather than downdraft?  If so it seems like
that would make it much easier to integrate.

Everett

The Holley will not run inverted as is and as far as I know nobody
has ever got that to work. I am not saying it is impossible but
it is very unlikely.

The FAA will not sign off a carb engine without carb heat. It is mandatory.
If you use the side configuration shown in some of these 3D's it is very
easy to add carb heat as the super hot muffler is just below the carb.

Paul Lamar



Anytime we put fuel near a heat source we need to be very careful!
   I would suggest at least, a drip tray(with drain to exterior of cowl)
separating the carburetor from the exhaust system(or vice-versa - - an air flow
augmenter surrounding the exhaust system).

    How do you manually lean the Holley carburetor?
                                    John Andrich


You use a McNealy tuning kit. PL

"The mixture control body is CNC machined from 6061-T6 aluminum which is
alodine treated, the shaft is stainless steel and the screws are plated
steel."

"The first picture is what comes in the kit. The mixture control plate is in
the background with the accelerator pump extension arm., power valve block
off plug, and installation bolts in the foreground.  I also include a set of
three gaskets which are not shown."

" The second picture is a unit installed on a 4 barrel Holley carburetor.
The installer is responsible for the push-pull cables and attachment
hardware.  As you can see, the unit is installed in-between the jet plate
and the float bowl.  This requires the use of longer float bowl bolts which
are included in the kit.  The arm swings thru 90 degrees of rotation from
idle cut-off to full rich. The arm can be clocked anywhere on the shaft to
make installation easier.  The arm in the photo is in the full rich position
and idle cut-off would be in the 4 oclock position. Two shafts are avialable
to make full rich either in the clockwise rotation or counter-clockwise
rotation.  This sometimes simplifies the push-pull cable installation.  I
usually ship the counter-clockwise to full rich shaft, as this parallels the
throttle rotation on the opposite side of the carburetor."

If you have any questions please e-mail.

Tom McNeilly <tomcn@earthlink.net>