Stephan:
The diode I used was similar to a IN 4001 (only bigger) I can't remember
what it was as too much time has passed but I'm sure it was nothing special.
AS for the cap I just Tapped it into the MSD power line near the box (after
the diode) to 'filter' out any wandering AC. layout was box -diode-cap-car.
As for cap design I used an automotive one any parts store will have a
points style condenser for a Chev small block, just hook the wire to power
and ground the case. Any good sized electrolytic cap that can handle the
heat and humidity under your hood in Miami should work just hook up the pos
end to the box and ground the neg. end.
One more thing, make sure the wire going to the regulator that senses
voltage has a good connection at both ends and goes directly to where it is
supposed to go without any 'taps' on it. If there is a draw form somewhere
on this line the regulator may be sensing the voltage drop and running the
alt to try to replace the charge. also make sure the reg. has a very good
ground so it can sense voltage properly.
What is the present voltage in the battery? where does it go while running?
hope this helps,
Rick 2028/0539
----- Original Message -----
From: alphachi <alphachi@writeme.com>
To: <Bricklin@autox.team.net>
Sent: Monday, October 30, 2000 11:17 PM
Subject: Rick, more alternator stuff
> Hi Rick,
> The diode was a surplus one I had laying
> around but one but one rated for about 120 volts and about five times the
> max amp draw of the MSD should work fine. for the capacitor I just used an
> old condenser from a points style distributor.
>
> What type, construction, and what rating do you recommend for the MSD?
> As for the condenser/cap, where did you put it in circuit?
>
> The alt installed is a custom wound one from AIS, and was built to put out
> over 100amps at 15v in a ford small case. This does compound any heat
> problems. While the alt was over heating, the orginal power lead which
is
> what, about #6- #8, was not even warm, which surprised me a little.
>
>
> As for the adjustable regulator, it was recommended because of the
distance
> between the alt and batt and the HO alt, and the desire to run 14v. I'd
> like to run about 14v to insure a quick charge on the start/deep cycle
> Optima batt which can take 15v, and to decrease the amp draw slightly on
> accessories. Some additional accessories like the Elec. cooling fans and
> TT's air compressor, amp, etc.. put a good demand on the batt. But the
> over-voltage should not present any problem on the B since there are
really
> no sensitive electronics onboard, except maybe the Hella headlights which
> are halogen and typically don't like anything above 13.5v. The MSD should
> not have any problems either. I have always been told that as a rule of
> thumb, a 10% increase of the rated voltage should provide a wide safety
> margin. At 14v, we're running a bit more than that, but I do notice the
A/C
> fan runs faster and therefore puts out a lot more air which is welcome
here
> in Miami. The OEM radio also plays cleaner which is a complete mystery
to
> me. Time will tell if the slight increase in voltage is too much for the
> fan, but the extra boost in cooling is too much to not try and do it.
>
>
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