Bob, what are the advantages of gap, on both ends. I originally put
.063" on my plugs, and the dyno man backed them to .048". This is with
a MSD6AL, Mallory magnetic distr, 8mm Taylor wires, platinum plugs, big
Mallory coil, and 9.5 compression ratio.
Thanks
Larry
Bob Palmer wrote:
>
> Theo,
>
> The parameter that directly determines the spark voltage is the spark plug
> gap. Back in the '70's the auto manufacturers went to very large gaps -
> .070"-.090" - and consequently had to increase the cap size and make other
> improvements in voltage standoff capacity. I'm not sure what gap is normal
> these days, but bigger is better to a certain extent at least. I think you
> will see that MSD recommends around 0.055" or so, depending on compression
> ratio. For quite a while I ran an MSD with a standard Ford dual-point
> distributor with 0.055" plug gap and never had a problem. This was with a
> pretty high compression motor BTW. I think a good set of 7 mm wires will
> work just fine too, in case you are after that "stock" look.
>
> Good luck,
>
> Bob
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