plug gapping

[john wright]

The correct gap for the plug should be .060 for the stock HEI. The .080
gap is very hard on the stock Wires cap and rotor. Dick Patterson who
builds Springfield HEI systems for the GMC recommends the .060 gap for
his system. As for the Jacob's system you could go bigger, but I
wouldn't go over .080.

J.R. Wright
GMC GreatLaker
77 Eleganza II
Michigan

>
> My manual says .080 for HEI plug gapping. I have the Jacobs system and they
> recommend a bigger gap, a gap which was stamped on the box. I am hoping one
> of you knows this specification. Frankly, I pulled out a plug today, and it
> was .060. I am replacing all of my plugs manana. Anyone know the correct gap?
> Larry in MO, PB75

 

[al chernoff]

I was also told to use .6 as the gap with the jacobs system.
al

> My manual says .080 for HEI plug gapping. I have the Jacobs system and they
> recommend a bigger gap, a gap which was stamped on the box. I am hoping one
> of you knows this specification. Frankly, I pulled out a plug today, and it
> was .060. I am replacing all of my plugs manana. Anyone know the correct gap?
> Larry in MO, PB75