> These guys in Canada are using a slide throttle as well on a fully
built
> 20B. If you look closely in the video it doesn't look like the slide
plate
> is Teflon. Looks like SS metal or (aluminum?).
> See video on right side of page.
> http://mpsys.ca/MPSv1.htm
>
> Paul Chang
>
> My browser won't work with that .htm Paul.
> Can you capture a few jpgs from the video?
> Maybe they are using linear ball or roller bearings.
> --
> Paul Lamar ...No rotor no motor.
At the risk of sticking my nose in where it doesn't belong, I went to
that
web site and found a bunch of stills. I don't think they show the
internals
of the throttle, but they are interesting. I did not include all of
the pix
there -- just the ones that might shed some light on the intake system.
Doc
OOps! forgot to attach the pix. Here they are.
All I see are flanges. I see no pictures of the slide throtle.
If it is a slide throttle tt better be Teflon or antifriction
bearings with that turbo charger you could easily
lock up a slide throttle.
What is the URL Doc?
Paul Lamar
http://mpsys.ca/Images/RX7/WebAlbums/20B%20Assembly/index.htm
Doc
Even the low resolution video takes forever to load. There is a
bottleneck on the origination end somewhere. The video doesn't show
much. But, the minute or so of engine idle audio is sweeeeeet! The
shots down the throttle throats show a pressure relief, idle air hole of
about .2" to .3" diameter. That is probably enough to prevent binding
from too much pressure differential. During the video, the throttle
plate is not opened enough to get a clear view of the hole shape.
Paul, if a small tube were connected to the manifold downstream of the
slide plate and run to the flat area of the frame on the upstream side
of the plate, the pressure difference on the slide would be mostly
mitigated everywhere except at the throat. As you said before, the
leakage would be minimal, and we need some idle air leakage anyway.
Slots could possibly be milled into the inside of the slide frame
instead of having external tubing.
Would it be beneficial to put an idle air valve or orifice into each
intake runner downstream of the slide throttle? It would make it
easier to adjust idle speed.
On that Jaguar slide throttle manifold, the mechanical injectors are
pointed upstream. Would that give better fuel/air mixing or do those
injectors fire to the side?
Aubrey
Worth a try. I would still use the Teflon. Even with the
Teflon there is a force of about 6 pounds.
Good question on the air orifice. We will know more
when Mark gets his running with Tracy's computer.
Yes on the upstream bit but there still is no consensus.
I have seen them straight in, up stream and down stream.
It does not seem to matter too much.
Paul Lamar ...No rotor no motor.
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