[Diy_efi] LS1 coils, smart or dumb?

[Dave Dahlgren]

It is dumb and is metri-pack (waytek has the connectors as do I)  good # is 5 ms
dwell i use them all the time on aftermarket stuff...
Dave Dahlgren

Derek wrote:
> 
> I checked the achieves, and got lots of posts related to this question, but it
> never seemed to get settled.
> 
> I know the LS1 coils have the ignitor/module/driver built in. I know they are
> activated by a 5V signal from the ECU. But what I don't know for sure is if the
> coils are "smart" (adjusting the dwell) or "dumb" (dwell set by signal from
> ECU).
> 
> The statement I saw most was that they were in fact dumb, starting the coil
> charge when a 2.7V+ signal was sent to the IGN input, and discharging when the
> signal dropped to 0V. In this way the dwell is controlled by the ECU or whatever
> you are using as a signal generator. Is this correct?
> 
> Also, is the 4-pin plug for each coil a standard 4-pin weatherpack? Looks like
> it.
> 
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