ACRE wrote:

This one truly does it all. combination throttle body, plenum,
alt air valve and ram air valve. it is about six inches in diameter
and with a bit of tweaking I might be able to get it down to
five inches in diameter and still have a 3 inch ram air port and
three inch throttle body.

This is a classic sleeve valve. The inner sleeve rotates and is controlled
by cables and  a wheel on the instrument panel. This one wheel controls
the throttle and the alt air selector.
Ram air comes in from the top. Alt air comes in from the side.

The ends are capped of course and this is designed to work with
side ports and four or more runners. Best place for throttles in P-ports
are close to the block. Not applicable to P-ports.

Nothing that can do all these functions will be simpler or lighter in weight
than this. Easy and cheap to make in the bargain.

Paul Lamar

Here is the five inch version. Really tricky. The break through was five
throttles instead of only one when in the alt air position. Don't ask.

The inner sleeve starts out closed with the three inch hole pointing straight
down. Rotate it clockwise 90 degrees and you are wide open throttle
on alt air. Rotate it another 90 degrees and you are wide open throttle
on ram air. To close the throttle rotate it 180 degrees counter clockwise.

Even easier to do if you don't need alt air.


Paul Lamar

Is anybody interested in this other than me? I am thinking of having a pattern
made and a bunch cast up. Next iteration will be 4.5 inches in diameter
and will have injector holders. At wide open throttle this is
superior to a butterfly and as good as a slide throttle.

Casting seems the only practical way of making it but a composite mold is
not out of the question.

Paul Lamar
 
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