[Diy_efi] Oval throttle linkage

[Scott Pearson]

Funny this topic came up, I've been meaning to hit the salvage yard and look
for different linkage for the Trofeo. The S/C 3800 has a very agressive
opening for the first 50% or so of pedal travel.

Kinda of a PITA with a manual transmission, g/f just about always lights the
tires up when she takes off...

- Scott
----- Original Message -----
From: "Jack Vines" <jackv at ambassadorprograms.org>
To: "'Derek'" <derek at derekdevises.com>; "'List for general do-it-yourself
EFI talk'" <diy_efi at diy-efi.org>
Sent: Thursday, May 15, 2003 9:48 AM
Subject: RE: [Diy_efi] Oval throttle linkage


> Derek,
>
> Most all efi cars and bikes use a cam-shaped throttle linkage.  The lower
> horsepower Asian cars are infamous for using about half the throttle
travel
> in the first inch of pedal depression.  This, combined with a tight torque
> converter, makes them feel "peppy" around town.  The rest of the throttle
> travel, the noise gets a bit louder, but the car doesn't go any faster.
>
> The high-end European cars, especially the old Porsche 944, had just the
> opposite.  The throttle pulley was extremely egg-shaped, so it opened
slowly
> at first, so wheelspin could be modulated in rain or snow.  After the
first
> inch or so, then it became linear.  The aftermarket sold round pulleys so
it
> would feel more Asian!
>
> thnx, jv.
>
> -----Original Message-----
> From: Derek [mailto:derek_obanion at yahoo.com]
> Sent: Wednesday, May 14, 2003 6:21 PM
> To: List for general do-it-yourself EFI talk
> Subject: [Diy_efi] Oval throttle linkage
>
>
> I was reading about the Kawasaki ZX12R bike, and noticed it made mention
of
> a
> oval shaped throttle linkage. They claim it gives more precise control at
> low
> throttle openings, with increased opening rate as you get more towards
WOT.
> Makes sense. Anyone do anything like this for a car? Maybe help me out in
> determining the best shape to use?
>
>
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