Multi Coil Setups

[Dave & Irina Eicher]

Hi Orin, are these smart coils you mention used on the LS1? I have a 1998
LS1 and need to understand the eight coils it has better. There are four
wires going to each of the eight coils.

thanks,  dave


----- Original Message -----
From: Orin <orin at diy-efi.org>
To: <diy_efi at diy-efi.org>
Sent: Wednesday, June 21, 2000 11:49 PM
Subject: Re: Multi Coil Setups


> > Check out the smart coils used on the late GMs, they have all the
> > electronics in them, and just need the fire signal. Orin posted about
the
> > "operation" of them.  They have an auto shut off.
>
> Yes, I'll dig out the info again...
>
> Leaving them armed isn't safe at very low RPM.  They will fire after
> 1/10 second of being armed whether you tell them to fire or not.
>
> As I recall, over 2.7V on the fire input arms them, then
> grounding it fires them.  Ie you don't need much more than
> an opto-isolator and a resistor to drive them.
>
> Orin.
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