> > Paul,
> >
> > Here is my second try at the Renesis Intake manifold.  This one is  > > equal
> > length runners.  the runners are 27" long.  The the primary runners  > > are 1.5"
> > dia.  and the secondary runners are 2" dia.  I should know in a few  > > days if
> > it works.  It is a 6 intake port engine, I combined the two  > > secondary ports
> > of each rotor into one 2" runner.
> >
> > Rino Lacombe
> > Rotary powered Glass Goose
> >
> > Hey Rino,
> > I've been sidetracked on my project for a while.  However, I have a
> different type of  intake manifold for a 6-port engine.  It is very
> light and is designed for high-rpm due to the short runners (which
> are very close to equal length).
> > I was planning on sending it out to Racing Beat for some dyno tests,
> but haven't had time to finish a couple of minor plumbing items for
> the injectors.
> > I has a Ford 70 mm throttle body shown in the pix, but the holes will
> accept a stock Renesis TB.
> > If you have any interest in testing this manifold on your engine,
> please let me know.
> > Scott Gettings

> Well my RX8 engine is now a permanent p-port. The side intake ports
> are filled in with JB Weld. Mazdatrix would give you a better deal
> on the dyno test I suspect. I will help Dave Lemon get the EFI working.
> Mazdatrix is closer to me than RB anyway.
> -- > Paul Lamar ...No rotor no motor.

Thanks, Paul.  I knew that your engine wouldn't accept this manifold, which is why I asked Rino.

Regarding Mazdatrix, would it work better for me to work with Dave directly, or let you
look at the TB first and coordinate things?  I know that you work with Dave and the
company on your PP and other projects.  With your help, maybe this one could fit into
another dyno run, and I could just take care of the costs?
--
Scott Gettings

Both. I'll help Dave get it running on the EFI as he has no experience
with Tracy's system and he may not want any experience with Tracy's system.
Not applicable to road racing.

It would cut the dyno cost if you can get it running down there before
you ship it.
-- 
Paul Lamar ...No rotor no motor.

This manifold uses the stock locations for the original 6 injectors - just the mounts
are different because the upper parts of the intake are cut off. It can also use a
stock RX8 throttle body.  Only a little plumbing is needed to have the fuel delivery ready to go.

Obviously, all of the moveable intake manifold mechanisms and sensors are not present.
So, would it be possible and/or easier to use a stock EFI controller to compare manifolds
and not have to worry about Tracy's unit?

It will be quite a while before my engine runs, due to my time constraints with several
other issues (work, mainly!).

--
Scott Gettings

That would be quite a project as the stock computer gets a lot of input from
the car other than just the engine. You would need to simulate those  inputs.
Perry Mick did it for 2nd gen units but he is a talented electrical engineer. Also
it runs stoichiometric at all times so you would need to devise some new method
for leaning it. Yet another problem is its reliance on the O2 sensors
in the exhaust. Works great on car gas but not so hot on 100LL. Perry
figured away around that in the 2nd gen engine.

Mazdatrix could get your engine running with Tracy's unit and my help
but it would add to the cost. Might be as much as $500 in additional labor
cost. Might be the way to go if you are too busy to do it yourself. Probably
the easiest way to go EFI right at the moment.

Another option would be an assembled Megasquirt computer from on of
the vendors that sell complete kits. One sensor required in that
case would be a throttle position sensor. As I recall the RX8 TB does
not have such a sensor.

The situation could change as hopefully somebody will come up with
one cheap and simple PicAXE or similar system written in easy to
modify BASIC programming language per rotor. The program can be written
in a half hour.

This is a real simple system where a pulse is taken from the CAS and the
computer measures the intake manifold pressure and and intake air temperature
and fires one or two injectors every time the engine rotates once. This
is functionally identical to the way Tracy does it. It would also work
just as easily with a mass air flow sensor.

If somebody does not take on this project soon I am thinking of doing it myself.
These systems are real cheap about $50 per rotor. If one fails the other
still works. I have a PicAXE laying around.

http://www.rev-ed.co.uk/picaxe/
http://www.phanderson.com/picaxe/picaxe.html
http://www.picaxe.us/index.html
http://www.picaxeforum.co.uk/
http://www.parallax.com/
http://www.emesystems.com/BS2links.htm
http://www.eg3.com/WebID/embedded/basic/stamp/blank/tutorial.htm
http://www.reflections.co.nz/home/micro/Software/Stamp-detail-incl-instr-set.htm