FW: Electronic timing advance

[Charles Brooks]

Thanks, I'll check out the Ttype sight tonight.

Charles

Bruce Plecan wrote:

> -----Original Message-----
> From: Charles Brooks <cbrooks1 at mail.tqci.net>
> To: diy_efi at efi332.eng.ohio-state.edu <diy_efi at efi332.eng.ohio-state.edu>
> Date: Friday, January 22, 1999 7:36 PM
> Subject: Re: FW: Electronic timing advance
>
> If your running a ESC Module, they have a diagram for a DIY one at the GN
> Ttype
> site,  or just us a 339/any comparator to the input of the KS to the ecm,
> have
> it trigger a 555 as a monstable for a sec., and use it's output for a LED,
> relay
> etc..   Some of the GN Ttype vendors (ie ATR, I think) have an animal for
> sale.
>    If your car doesn't have a ks then buy a matching ESC Module, and
> matching knock sensor (well for gm's anyway).  and wire it up
> I think the bias voltage from the esc to the ecm is 7v.  Set up the
> comparator for 6, and then just a "filtered""real" knock will trigger it.
>   I have played mix, and match with them, and while there is some
> difference for those having trouble reading plugs, any thing is better
> than nothing.  Like I'm currently using a v-8 ks with a 231 ESC Module
> and for my combination it's perfect.
> Bruce
>
> >Do you know of any ready made gizmo's to do that? What do they trigger off
> of,
> >the sensor or the ECU? If there isn't any such animal currently what would
> be
> >the recommended trigger for a homemade job, sensor or ECU?
> >Charles Brooks