>
> > > > Paul I think these fit on the Racing beat manifold. I just e-mailed them to find out what the bolt pattern is, It specifically states that it is a weber replacement for the rotary. they can also make
> > > > them with two injectors per throttle body. THAT'S GREAT!!!!
> > > >
> > > > http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&ih=013&item=230019159281&rd=1&sspagename=STRK%3AMEWA%3AIT&rd=1
> > > >
> > > > Tony
> > > >
> > > > Place this at the top of the long pipes near the plenum cum scoop
> > > > Otherwise the built in butterflies will disturb the organ pipe
> > > > tunning effect. You really need four injectors for safety
> > > > and staging with Tracy's system.
> > > >
> > > > Paul Lamar
> > >
> > > >
> > > > Paul I think these fit on the Racing beat manifold. I just e-mailed
> > > them to find out what the bolt pattern is, It specifically states
> > > that it is a weber replacement for the rotary. they can also make
> > > > them with two injectors per throttle body. THAT'S GREAT!!!!
> > > >
> > > > http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&ih=013&item=230019159281&rd=1&sspagename=STRK%3AMEWA%3AIT&rd=1
> > > >
> > > > Tony
> > >
> > >
> > > It does have four injectors. You just can't see them in that
> > > view but on the ebay listing you can clearly see the other two.
> > > Tony
> > >
> > > Looks good and will work fine. Is it 48 mm or 51 mm ? Big bucks
> > > however without the injectors and base extensions. $250 is more
> > > like it. It will also be slightly less power than with one large
> > > 3 inch butterfly. You will still need to build base extensions for
> > > it. What sort of machine tools do you have access to? Got any stock
> > > Mazda throttle bodies lying around?
> > > --
> > > Paul Lamar ...No rotor no motor.
> >
> > Paul it looks like these are 50mm. I have a really nice lathe I
> > also have a clausing milling machine. I have access to a cnc
> > waterjet and cnc Tree mill so whatever you can come up with I
> > can make it. I do have my stock throttle body I saved it for
> > some reason, this must be why.
> >
> > Tony.
> >
> > With all those tools why are you not building a p-port? :)
> >
> > The easy thing to do is take the long shaft out of the stock
> > Mazda tb and use it to make a 4 inch round or square plenum cum
> > throttle body cum air scoop as in this 3D. One part does three
> > jobs. The slot in the shaft is long enough for a 4 inch square
> > or round butterfly.
> >
> > I still need those dimensions on the RB 6 port manifold in relation
> > to the cowling. If you don't have a cowl yet use a wood furring
> > strips to mock it up or simulate it.
> >
> > Is your engine in the airplane yet?
> >
> > Do you have a gear box?
> >
> > If not place the engine temporarily
> > and simulate the gear box with a 12 inch diameter plywood
> > disk. Then use the wood furring strips to simulate the cowl
> > and give me those dimensions. We might be able to fit
> > some 90 degree 2 inch diameter tubing with a 3 inch center line
> > radius to the RB 6 port manifold and get it under the cowl.
> > The ebay throttle body would then work mounted horizontally
> > or you could build one.
> >
> >Paul
>
> I thought that making a P-Port would've been a pain in the arse it
> was real easy to bolt up the RB manifold. Plus my housings are brand
> new I didn't want to screw them up by trying to cut a whole in the
> side. At the time when we where all talking about P-porting there
> was still a lot of huplaa about the idling issue so at the time when
> I bought my housings I just went with turbo housings and never gave
> it another thought I'm still on the fence about it but as I can tell
> not a lot of p-ports flying yet, mostly manifolds so far, I think!
> I could be very wrong but that is my perception believe me I'm all
> for more horses with the same amount of weight I'm just afraid that
> it won't see a timely TBO at such monster amount of HP.
>
> To answer your other question NO I don't have a gear box as of yet.
> No the engine is not in the airplane. What I'm trying to do is get
> the preliminaries out of the way, like twin injector throttle bodies.
> What I'm working on now is getting the retracts finished and getting
> my air scoop completed, which in turn will allow me to complete my
> firewall, then I can mount my engine. Probably looking at about
> 5 months worth of work given my work schedule. Thanks for the
> renderings again. I have a great steerable nose gear for my Long
> Ez I'm just getting back from the water jet cutter. I'll send some
> pics it's gonna be awesome.
>
> Tony
>
> -----------------------------------------------------
> Tony, why don't you buy a junk rotor housing from Mazdatrix for
> $30 and cut a hole in it to get some experience. Buy two. Do one
> and see what happens. Then do another till you get confidence
> in doing the procedure. I'll give you the step by step the
> way I did it.
>
> We had three P-port engines at OSH in 2005. At least two are
> flying on a regular basis that I know about. One crashed for
> a non rotary related electrical reason. Everett Hatch and Allan
> Tolle were flying P-ports ten years ago.
>
> It will be a long time before anybody proves or disproves P-ports
> have a shorter, the same or a longer life than side ports.
> Nobody has worn out a rotary engine in aircraft service yet
> and it has been at least 30 years when rotaries were first
> used in aircraft. What probably happens is they outlast
> the pilots.
>
> The Mazda Lemans winner four rotor P-port engine was disassembled
> after the race and the wear measured. The wear was 1/2 to 1/3
> of the upper limits of tolerance. Piston engines are usually junk
> after the Lemans race if they even complete the 24 hours. Piston engines
> are usually in dire need of overhaul after all endurances
> races. Star Mazda ran 2nd gen stock rotary engines for ten races a
> year for several years without touching them. These race engines are
> run at wide open throttle most of the time except for long corners
> and braking. Mazda rotaries dominated endurance racing in the U.S.
> during the 1980's until the rules were changed handicapping rotaries.
>
> The Lemans engine spent the majority of its time during the
> 24 hour race at 7000 to 8500 RPM full throttle. You are going to take off
> and climb out for less than five minutes at 7500 RPM full throttle
> and back off on the RPM to around 6000 and drastically reduce power
> for cruise. Five minutes at 1000 feet per minute is 5000 feet where
> you are not going to get full power anyway.
>
> You will probably see about 50 hours a year which is average
> for most private pilots. That is one hour every week, week in week
> out. Ten years would be 500 hours. Worst case even if you needed
> to lap the end housings and put new seals and rotor housings in
> it after 500 hours that is still way cheaper than an aircraft engine.
>
Now why did you have to go and write all that Paul? I was just happy
in my little world over here and now you've gone and thrown a wrench
in it. ; ) O.k so here is the scenario. I watched the Bruce T. rebuild
video rebuilt my engine with brand new rotor housings and Titanium
studs (6al-4v roll threaded). I put my engine back together (it's an
89) the fly wheel was the very heavy automatic or manual? can't
remember, but it was heavy! obviously not the correct one. So what
I needed also was a counter weight, got one from a junk yard.
God knows if it's the right one. My buddy Doug Mueller you all know
from this site mentions to me about balancing the rotors with the
counter weight and that I need to send it off so they could take it
all apart and balance it. So I ask you who can I send it to who can
balance it and P-port it with out (1) ripping me off . (2) doing the
job right so it doesn't kill me. Oh that's me!!
NO just kidding. I
don't think I have time to do it. I will have to farm it out, if you
can recommend a company that could do it all that would be great. I
just want to send them the motor and have it come back ported and
balanced with the Titanium studs in as delivered condition. OR do
I just leave my RB manifold on there get a counter weight from Mazda
for that year get my redrive and go flying How much power are we
talking here???? not to mention time.
Tony
I hope you did not put after market apex seals in it.
How long ago did you build it?
Mazdatrix can balance your engine and port it or P-port it. You are
in Las Vegas. You might take a day off and drive over to see them
and bring your engine. They are in Signal Hill and may be open on
Saturday. http://www.mazdatrix.com/ If you let me know when you
are coming I'll try to be there whatever day you choose.
BTW I don't get a commission :)
I just think these guys know what they are doing. Dave Leman
the owner is very very competitive in National road racing.
They built Perry's engine and it has 450 hours so far. They also
built Marks p-port engine.
Paul Lamar ...No rotor no motor.
Paul what aftermarket apex seals are you referring to? I used
the ones that Tracy supplied with his rebuild kit. I'll call
Mazdatrix on monday and see what they charge for p- porting
and balancing. I'll let you know when I head down to "Cali" we
can meet up and grab some lunch. I don't know if Doug Mueller
has e-mailed you as of late we have a guy here in Vegas doing
an RV10 with a 20b in it.
Tony
As long as you have not run it yet your rotor housings
are still OK. Tracy seals are very hard on the rotor
housing wear surface. I really don't know how long the
rotar housings will last with those apex seals.
Please read this
http://www.rotaryeng.net/seals.html
When you get it balanced I would have Mazdatrix swap
them out for stock apex seals.
Paul Lamar
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