GM optispark

[Roger Heflin]

I have the electromotive unit.

It has a crank trigger with quite a few teeth (each 6 degrees I
think), and generates the needed signals for the computer to be happy.
It runs really good once it starts.  The starting is not quite as
quick as with the stock opti, but I really improved and changed the
readings at idle (better igntion/burning).  I probably should put
something on my web page.  I have got a request from the fourth-gen
f-body list to write up my experience.


		Roger
		93 Z28, !opti, 115k original waterpump.

On Sun, 6 Dec 1998, Bruce Plecan wrote:

> 
>     -----Original Message-----
>     From: Curtis Mittong <poohbear at twd.net>
>     To: diy_EFI at efi332.eng.ohio-state.edu <diy_EFI at efi332.eng.ohio-state.edu>
>     Date: Sunday, December 06, 1998 12:35 PM
>     Subject: GM optispark
>     
>     Electromotive sells a DIS (4 coils, not 8).  Some one on the list did that some time ago, you'd have to hunt the archives, unless he's still active.
>     Cheers
>     Bruce
>              
>     
>     
>     Here's a mental project for anyone with extra time.  To: anyone familiar with GM optispark units.  As you know the whole thing is a pretty self-contained unit with a cap and rotor in a small, cam-driven unit and a nearby coil pack.  The problem is LT1 water pumps die pretty regularly at 25-35k miles spewing dexcool all over the thing ruining it.  They are not rebuildable, they have to be replaced in one extremely expensive unit.  What about avoiding the time bomb altogether?  I was thinking a crank positioning sensor and one coil for each cylinder a la Northstar or LS1.  Will the computer signals be compatible with my stuff?  I want to keep the stock computer setup, just plug and go.
>      
>     Thanks,
>     Curtis
>