> > > 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 Lamar ...No rotor no motor.

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