Larry Young wrote:
>
> I finally got my overdrive finished and ready to install. I couldn't
> bring myself to run it at 650 psi, so I settled for about 530. If that
> doesn't work, I'll add another shim. Now I need to know how they are
> normally wired for racing or I think I've read that some are setup to
> shift mechanically. What is the best setup. If you're running with the
> solenoid, do you use a relay like to stock set up? Do most people
> bypass the switched? I'm absent minded enough that I'm afraid I might
> forget and try running reverse/overdrive. Any and all advice will be
> appreciated.
Brain fade has to be accounted for, surely. <smile> The way to keep the
o/d engaged during shifts, but still provide some protection from
accidental engagement, would be to install a two-pole time-delay relay,
so that the time-delay relay powers the main solenoid relay, which then
powers the solenoid. One pole of the time-delay relay connects through
the 3rd gear switch, and the other through the 4th gear switch. The
time-delay relay makes the two switches work as if they were a single
make-before-break switch, as far as solenoid power is concerned. With a
delay of 0.5-1.0 second, there would be no accidental engagement in 1st
(presuming logical shifts from 1-2-3-4 and back again), and no danger of
engagement in reverse, and the o/d engagement switch would work as
normal, by controlling the power to the main relay coil in series with
the time-delay relay input power.
More complicated, electrically, but one way to solve the problem of
needing reverse protection and keeping the o/d solenoid engaged during
3rd-4th-3rd shifts.
Cheers.
--
Michael D. Porter
Roswell, NM (yes, _that_ Roswell)
[mailto:mporter@zianet.com]
The gulf between content and substance continues to widen....
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