[Fwd: Nology]

[Tom Sharpe]

Raymond C Drouillard wrote:

> For the $100.00 +, I would go
> for capacitive discharge ignition and actually increase the amount of
> energy that goes to the sparkplug.  I believe that they sell a kit in Oz
> for around fifty bucks.  No snake oil, just a straightforward application
> of known electronic technology.
>
> Several years ago, I built a $35.00 heathkit CDI box.  My current vehicle
> uses a somewhat more expensive Jacobs Omni Magnum.  It got rid of a high
> end miss and causes it to idle well even in cold weather.  No, I'm not
> trying to hawk Jacobs products.  There are lots of other products out
> there that will do the trick.

I also used to have a HK CD box and I loved it. I have seen a MSD in pieces
on the Net and it doesn't look too hard to duplicate, although it doesn't
appear to be ideal. I looked around the shop for the HK circuit but couldn't
find it. How about someone working out the circuits for a multi-spark CD like
the old HK. If I remember correctly, it set up an oscilation between the
driver capacitors and the coil and sparked several times rapidly before
recharging for the next cyl.

It whistled about 15K+ or so but you couldn't hear it over the turbo.

Regards  Tom