Another alternative is to use just two coils, one tied to cylinders 1 &
4, the other tied to cylinders 2 & 3. This is a common set-up on new
Fords, one plug fires on at the end of a compression stroke the other
fires on the end of an exhaust stroke. No effect with the spark into
exhaust, plus easier to throw an arc with the lower chamber pressure.
You eliminate the losses from the rotor and cap, plus give the coil long
time to "charge" (although not really needed for the peak rpm, our
4-bangers see).
Still need to figure out how to trigger the coils, seems simple enough
crank angle sensor, FPGA to map timing curve and fire the plugs -- yea
right I'm still haven't had time to get the '79 310 electronic dizzy
set-up.
Todd Osborn
68 2L DATSFUN
DemonTSi@aol.com wrote:
>
> Ah that's true... my only gripe with the electromotive HPV-1 DIS system is
> that it goes for close to 1000 I think. Granted, you are getting a system
> that will afford you full control over ignition timing and events... but I
> think it'd be cool to DIY rig up a direct coil system using just four coils
> (about 80 bucks) and your dist as a "switch" of some sort to fire them. Hmmm,
> i've thought about doing something like this on a honda before, but never
> really put much thought into it....hmmm
>
> \/ /\ /\/ <----gonna go learn out more bout how coils work now! :)
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