[Diy_efi] Ignition retard

[Dustin Lof]

GM used on most of their 81-86 pickups a knock retard
module up under the dash, It would retard the timing
via the ignition module, using a knock sensor input,
and possibly a vacuum switch, I dont know much more
than how to bypass it though.  Dustin Lof

--- James Seabolt <turbofiat at hotpop.com> wrote:

> Is anybody aware of a DIY ignition retard system I
> could build?
> 
> There may be more to it that meets the eye but I'm
> thinking it's possible 
> to install a device between the negative pole on the
> ignition coil and 
> control module and use a 555 timer chip circuit to
> delay the time it takes 
> the ignition coil to collapse creating a retard
> effect. In order to switch 
> from non-retard to retard mode, I could use a Hobbs
> pressure switch so when 
> my turbo kicks in, it activates the delay timer.
> Then use a potentiometer 
> to adjust the amount of delay.
> 
> Sounds simply but is it possible?
> 
> 
> 
> 
> James Seabolt
> Tennessee, United States
> Homepage --->>> http://users.chartertn.net/jseabolt/
> 
> 2003 Subaru Baja
> 1980 FIAT 2000 "turbo" Spider
> 1968 Ford Fairlane 500 (Not a Ford Galaxie!!)
> 1987 Yugo GV 1500cc also turbocharged
> 1979 Brava four door, 5 speed
> 1980 Brava four door, automatic, power steering
> 
> 
> 
> 
> 
> 
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