<VV> Dual Points

[Lonny Clark]

I have a dual-point distributor for Corvair, and it is nothing like the
"du-coil" ignition I took out of my GTO (can't get new cap). The dual point
provides good spark and does not lose it's point gap setting like a lot of
early vairs. It does not have vacuum advance, but is reliable and works
well. Mechanical advance can be adjusted by changing weights and springs
internally.

The du-coil ignition was in a former racecar, the dstributor runs at half
the speed of the stock distributor, and has two coil inputs - one for each
point set. The rotor has two ends, so that the spark alternates which end is
driving a combustion event. I've never seen another one, but apparently it
was a well-known system back in the day...


On 2/12/06, Smitty Smith <vairologist at verizon.net> wrote:
>
>
>
> From: Ryan Verthein
> Subject: Dual Points-advantages?
> As far as I can tell, the advatage of a dual points system is that each
> set does the job half as much as they do with a single point system....while
> one is firing, the other is closed...so they last twice as long by doing
> half the work.
> True?
> --------------------------------------------
> Smitty says:  Dual points came in two flavors.  One type the second set of
> points both closed and opened later than the first set.  Reduced current
> load compaired to all being on one set as well as extending dwell.  The
> other way was to operate each bank of a V-8 for instance on a different set
> of points.  That way the lift of the points could be more gentle and prevent
> float at extreme rpm.
>
> _______________________________________________
> This message was sent by the VirtualVairs mailing list, all copyrights are
> the property
> of the writer, please attribute properly. For help, mailto:
> vv-help at corvair.org
> This list sponsored by the Corvair Society of America,
> http://www.corvair.org/
> Post messages to: VirtualVairs at corvair.org
> Change your options:
> http://www.vv.corvair.org/mailman/options/virtualvairs
> _______________________________________________
>



--
The sooner you fall behind, the more time you'll have to catch up.