Subject: P Port Progress
From: Rotary Engine
Date: 7/5/2010, 8:12 PM
To: AAA Put this in the To box


Where can I get one of those slide throttles, looks really nice...
Pedro Lopez

That particular one is not made anymore. It was also heavy.
We have a kit for $175 with the tubes welded
to front and back covers.

http://www.rotaryeng.net/ Scroll down to the bottom
of the first page for pictures.

Here is a how to by Craig Smith.

You can have it anodized with any color you like.

I will sell you the one that looks like Joe's for
$500 plus shipping. It has a throttle cable.
Never used.

Paul Lamar



i would like one but with bigger ports for a racing engine.
Pedro Lopez

Looks like you will have to make your own or hire somebody
to make one. The people I know with the tools to make one
like this charge a lot of money :) Looks like a job for
a water jet and a tig welder.

Looks like the max tube supported is 2.5 inch OD. That is
a big P-Port!!!!

Here is a sketch.

Paul Lamar


I like the one with the teflon teardrop.  I think it
would be better throttle response at accelerating
from 0 rpm. the thicker throttler seems strronger
and prevents deflection on track, at acelerating.
I will need about 2 1/8 to 2 1/4 ports.
P.


There is no room between the runners for a teardrop.
The 2.5 inch barely fits. Draw it to scale and that
will become obvious.

In any event as far as I can tell it made no difference.
The P-port runs like crap at low RPM anyway. Especially
with the large size of p-port under consideration here.

A road racer never gets below 7500 RPM
and an aircraft not much below 5000 RPM.
Besides P-ports are outlawed in all classes
of road racing as far as I can tell. Unfair
to piston engines.

Drag racers run 9,000 to 11,000 with the tires smoking.

What kind of racing will you be doing?

Paul Lamar


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