[DML] Re: Stock Ignition vs HEI Ignition
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[DML] Re: Stock Ignition vs HEI Ignition



Your Mustang originally came with breaker points. You can't run HEI voltages through breaker points without premature (even more premature than usual) wear -- points changes every 5,000 miles rather than every 10,000 miles.

HEI needs breakerless (electronic) ignition -- period (IMHO).

The reason your Mustang's OEM plug gap is so small is because its lower voltage ignition can't jump HEI size plug gaps reliably. You would get the same problems only opening the plug gaps on otherwise stock DeLorean ignition without other HEI spec changes. That is why I put "*HIGHER INPUT VOLTAGE*" in capital letters.

Bill Robertson
#5939

--- In dmcnews@xxxxxxxxxxxxxxx, Stephen Rice <stevedmc@...> wrote:
>
> People seem to bash HEI on Deloreans for some reason.  Here is a
> little information I found out regarding my Mustang and HEI.
> 
> The stock plug gap for a 1965 Mustang is between .032 and .036 (very
> similar to a Delorean).  When I bought my Mustang the previous owner
> told me it was idling poor.  Upon checking the spark plugs I found
> they were gapped around .05 yet no one bothered to increase the
> ignition going to them.  I put in some new plugs that were properly
> gapped to .032 and the car seems to idle fine.
> 
> Upon further investigation I found that one very common mod in the
> vintage Mustang community is to upgrade to HEI.  Basically you put in
> a Duraspark II distributor and ignition module and then bump up your
> plug gap to .05.  My question is, if this is so commonly accepted for
> a vintage Mustang, why is it so bad for a Delorean?
> 
> -Steve Rice
> #16510




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