Electronic timing advance

[Matt Beaubien]

> The next now is to disable the existing (horrible) centrifugal advance
> mechanism, which is easy.

Can you just not fix the centrifugal advance and use it with the Crane
(formerly Allison) unit?  That may be your easiest solution.

> My original posting to which you replied most kindly was ...
> "... 3. Feed the optical pick up output to a digital advance / retard
> unit
> implementing a simple, programmable advance curve capable of at least 16
> sites.
> 4. Optionally add an imput for a detonation sensor to provide a few
> degrees of detonation induced retard.
> 5. The unit should just provide an output emulating a normal contact
> breaker, to drive a separate high energy electronic ignition unit
> (already fitted in my car)...."

Did you check out the Accel 49340 timing computer?  I'm not sure it it's
compatible with your optical output but you can talk to them and find out.
More info can be found at www.mrgasket.com/accelnew.htm.

There's not provision for a detonation sensor.  They tend to be pretty
engine specific but there's a company called J&S that make such a device
(I don't know much about it).  

That's about it.


Matt Beaubien
mbeaubie at ualberta.ca
Edmonton, Alberta