answer to cheep advance question

[Mike Ayres]

Look at http://www.picnpoke.com/projects/ignition.html 

The kit looks like it will do all you ask for under $50 bucks US. Knock
sensor input, programed avance with two options, and a tac output.

MCA




Danger  !!   you started my mind working again !

Andy  :-)

Bruce Plecan wrote:

> -----Original Message-----
> From: am018 <am018 at post.almac.co.uk>
> To: diy_efi at efi332.eng.ohio-state.edu <diy_efi at efi332.eng.ohio-state.edu>
> Date: Tuesday, October 27, 1998 4:15 PM
> Subject: Re: Re : Home-brewing an ignition advance control
>
> >I missed the start of this thread  -- I am pretty interested as one of
the
> >ideas I am kicking around at the monent is a knock retard device for
> classic
> >50s & 60s cars designed to run on 101 octane fuel what we called 5 star
in
> the
> >UK    --- basically idea just to put  few degrees spark delay in when
knock
> is
> >detected. The first part is a simple stand alone knock detector module.
I
> know
> >things like this have already been done but as far as I know none is on
the
> >market at the moment.
>
> MSD, and J+S sell them.  Also could use a gm knock sensor/esc to
> trigger a MSD multi step retard.
> Bruce
>
> >Andy Macfadyen
> >
> >Donovan_Dibble at ittauto.com wrote:
> >
> >> Al,
> >>
> >> I've been thinking of making a similar system.  I want (am) going to
use
> a
> >> PIC 1674 uP for the 'brains'.  This micro has built in A/D for MAP,
TPS,
> >> etc.
> >> This will hopefully make the system more compact.  Although I haven't
> >> worked
> >> on it in a while, I planned on starting by collecting data from a
> 'regular'
> >> HEI distributor with vacuum/mechanical advance and simply implementing
> that
> >> strategy into the micro.  Later, the knock sensor input and associated
> >> retard
> >> logic would be added.  I think the easiest (or most straightforward)
way
> of
> >> detecting knock will be with external op-amp filters rather than
> >> calculating
> >> Fourier Transforms within the micro.  Any signal conditioning would
also
> be
> >> taken care of with the op-amps.  I got as far as getting the vacuum
vs.
> >> advance data for the HEI but haven't taken it any further.  If you or
the
> >> list
> >> have any other ideas, I'd like to hear them.  Any motivational ideas
> would
> >> be
> >> welcomed too :)
> >>
> >> Don
> >>
> >> >I have been pouring over the HEI 4-pin and 7-pin diagrams and info on
> this
> >> >page.  The amount of info that is to be found on this page is
FANTASTIC!
> >> I
> >> >am trying to figure out how to make an ignition advance control for a
GM
> >> HEI.
> >> >I know MSD sells one but I would like to make my own if possible. 
It's
> a
> >> lot
> >> >more satisfying that way and I learn alot more.  Is this done with an
> >> >adjustable timer IC or is it some other kind of signal conditioning.
> >> >
> >> >Any Ideas???
> >> >
> >> >Thanks for listening
> >> >Al Ross
> >
> >