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Subject:Re: 1989-only 911 Turbo model designation & airshift kit?
From:Andrew Grebneff
Date:Mon, 14 Jan 2008 16:17:45 +1300

>Well, I'd be curious about this air shift thing.
>But what one normally would do for your situation is change the ratio of the
>shifter.
>Like if you extend it at the bottom, so the bottom moves further for
>movement of the top...........you can get what you want.
>   If you extend the part above the pivot say 16 inches sounds like it might
>do it, you then make the bottom longer by ...........just guessing
>...............two to three inches.
>But it's a lever. Levers have ratios, and you just adjust things around to
>suit your needs.
>Like this..........if 20 percent longer on top is long enough, then you
>lengthen the bottom part 20 % also.
>If that doesn't make perfect sense you can pmail me if you want.
>Heck, make a dummy out of 1 X 2 wood and experiment around, not in the van,
>just on your work bench.  But you want to extend both ends an equal amount,
>not in inches, but in percent of lengthening.   Same percentage increase top
>and bottom.  Works just like a see saw.
>Scott
>www.turbovans.com

Yes, but the longer the lower section is, the less leverage the top
section (the one you push) has on it, making the shifts more & more
difficult as the leverage decreases. Dunno, I guess I'll have to play
around with drawings. Better get me an image of one of those 911
short-shift kits as a basis...

As to the airshift, I begin to suspect that my mechanic helper is
confusing manual shifts with dragracing auto shifters.
--
Andrew Grebneff
Dunedin
New Zealand
Fossil preparator
Seashell, Macintosh, VW/Toyota van nut
� Opinions stated are mine, not those of Otago University
"There is water at the bottom of the ocean"  - Talking Heads