<VV> Electronic Ign. Question....
Sethracer at aol.com
Sethracer at aol.com
Thu Jul 31 19:17:13 EDT 2014
I cannot say for sure, but I believe I have tried every combination of
electronic ignition ever remotely adapted to a Corvair - or most V8s. In the
early 70's, I was using the Crown-provided Permatune ignition, a CD unit
built by a business adjacent to Crown Production Place address. It was driven
by the stock points - but I used the Blue-streak points for higher RPM. I
have mentioned, the problem with using points to trigger a CD, is that
little bit of current across them means a little bit of dirt or oil residue,
common in the Corvair dist, can cause a no run condition -the stock amps keep
the points clean until they finally burn. Somewhere along in here I used a
Stancor optical trigger ignition system, replacing the points. It worked
okay but was fragile. Then, in the mid-70's, I was converting Corvair
distributors to Magnetic pulse output, - (for racers, I did about 8 of them) - by
removing the vacuum advance plate, machine grinding the point cam then
pressing on a Chrysler 6-cyl reluctor and mounting the Chrysler pick-up on the
base plate, and sending the signal out - first to a Chrysler Ignition
module, then later to the direct magnetic input on a MSD-6A. When I built the
Lola, with a turbo, in order to retain the pressure retard, I swapped back to
a trigger that would mount on the stock - as refurbished by Dave
Langsather - point plate. The pressure retard worked with the Pertronix Ignitor 1
unit, which provided a points open signal to the MSD-6AL, complete with a
rev-limiter (in the MSD). When I switched away from the Turbo to Webers, I
swapped back to the magnetic trigger direct for the MSD-6AL . It worked fine.
A few years ago, maybe 10, I was having problems with carbon tracking in
the Corvair cap. People had been adapting on the GM HEI distributor from the
in-line 6 motor. The housing seemed to interchange and only a shaft mod and
a Corvair drive allowed the swap. Some interference was usually cured with
a BFH against the shroud. At that time, MSD came out with a new in-line
six distributor. It almost fit the Corvair, with the shaft/gear changes for
fit-up. The cap was smaller, being based on the pre-HEI GM distributor
systems of the mid-60s, but larger than the Corvair design. I converted about a
dozen of these for the Corvair. With their direct magnetic output, they
needed to be used with an external box, like an MSD 6A or Crane, or a
Safeguard. All have direct magnetic inputs. MSD was not willing to make a Corvair
specific unit. A few years later, Pertronix also brought out an in-line
six distributor, mounting their latest Ignitor module inside. I had been
pushing them for a few years to do a Corvair specific distributor, but they
decided not to do one. That brings us up to 2014. Those of you who attended
either the Performance Workshop in March or wandered through the vendor area
in Tacoma have seen my latest effort. But my fingers are tired. There is a
new solution for a higher performance distributor for the Corvair. Stay
tuned.
In a message dated 7/31/2014 2:53:47 P.M. Pacific Daylight Time,
virtualvairs at corvair.org writes:
On 7/29/2014 19:09, Jeff Wilson wrote:
> I'm thinking of taking the plunge and going to electronic
> ignition.
> I'd like to go whole-hog and include a MSD box.
>
> I'm fluctuating between the Crane unit sold by Clarks and
> the Ignitor 1 (heard there's issues with 2).
>
> Are either of these systems incompatible with MSD?
>
Hello Jeff,
There is no need to use the Crane or Ignitor units with an MSD box. All
the MSD needs is a trigger source, which can be the stock points, which
will run a long time as they will not be switching any current. The
more elegant method is to use a magnetic pickup assembly (e.g. Chrysler
6-cylinder reluctor & coil) adapted to the Corvair distributor. The MSD
will work with the stock coil, but I like the Blaster 2 coil for this
and also as a stock replacement.
Dale Dewald
Hancock, MI
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