Paul I was surfing the net looking for some Renesis intake and   exhaust
data. I found these pictures and video posted on Nopistons.com. I  saw
some of your info on some posts - the authors did reference your web
site. I could not determine where these photos originated.

Graydon Woods

Looks like the Mazdaspeed early slide throttle for the 13B
mechanical fuel injection for the 300 HP p-port road race engine.

Paul Lamar ...No rotor no motor.

This is beautiful work a long time before I built my throttle bodies
that I was completely unaware of  until today.  Apparently whoever
did this work  had both throttle bodies and slide throttles.  I
assume these units are not available today, but maybe there is a box
full of these parts on a shelf someplace,  I wonder if anyone has
info on how these units performance compared.  Is Mazda Speed still
around?  I will google it today.  Jerry


Well I uploaded pictures on here of the Le Mans four rotor many times
Jerry. Pictures are also on the http://www.rotaryeng.net site
for the last 6 years. Slide throttles date back almost 100 years
on racing cars. MazdaSpeed is still in biz but I'll bet they are
not cheap if they still have them.


Paul Lamar ...No rotor no motor.

I am sure that I have never seen these photos before.  The one thing
I would incorporate into the next TB (if there is one) is the flange
that allows it to be bolted to the housing, as opposed to gluing the
TB in place.  I have been discussing this for awhile  with Ed, but am
waiting to see how the slide throttles work out.  Jerry

You may not have seen those exact pictures but you have
seen this slide throttle before. It is the same one you see
in this picture which has been uploaded several times.

We don't actually glue the slide throttle to the rotor housings.
We glue the tubes with flanges to the rotor housings.
That way you can use nuts and bolts instead of drilling
and taping the rotor housings.

The slide throttle is bolted to the flanges.

Paul Lamar ...No rotor no motor.

Yes,  that is the only way to go.  Jerry

One other point. The bolted on slide throttles are
bolted on to the speical sand cast p-port rotor housings also
sold by Mazdaspeed. The rotor housings are on the left in
this picture.

Paul Lamar ...No rotor no motor.

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