Re: Ignition Help - Howell / Crane CD
It may not ever work with a CD - at least properly.
Reason being is a "normal" Kettering ignition "lets go" of the coil when it fires the plug. Meaning the coil primary "sees" a negative going pulse - that's what the FI uses to trigger.
The CD doesn't first charge the coil, then "let go" like the Kettering - it fires "through" the coil like a transformer. So the negative going pulse would be AFTER the plug fires.
But - you might try a couple things before ditching an expensive Crane unit.
Radio shack - get a resistance subsitution box - I think the cheapies are less than $10. And get a capacitor, around .01 MFD - non electrolytic $.98?
Put the capacitor in series with the tach lead - try it.
Remove the capacitor - put the resistance substitution box in series with the tach lead. Crank it while trying various resistances.
Even try both.
It may not work, but it's worth a try.
It may run, but it may also double trigger - way too rich.
If not - I'd go with a GM HEI system, the Howell, being a GM ,should work perfect with that. And it's cheap and easy.
Look up stealth HEI here - there's lots of info about how to make a remote mounted HEI. Sometimes you have to filter through all the baloney, but they work great!