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Old 10-11-2002, 05:51 AM
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Post spark plug gap

I have a 400 sb chevy with dual point and standard coil. What is a good spark plug gap? Also what is the proper points settings? Thanks for all the help so far.

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Old 10-11-2002, 06:11 AM
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Plug gap for a point-type ignition should be around .035". Go with the manufacturers recommendation on the point gap. I think the Mallory and Accel dual points called for .015" or .020" point gap. If you use a dwell meter to set the points in a dual point distributor, be sure to block off one point set and set them individually, as they do overlap. Once both points are set individually at about 30 degrees, you can remove the block and check total dwell. Hope this helps.
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Old 10-11-2002, 04:11 PM
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Most Mallory dual points call for .022 point gap, 26 degrees dwell for each set of points, 33 degrees total dwell + or - 2 degrees. I usually rip a piece of matchbook cover and stick it in the set of points I want to dissable so I can set the other points. .035 should be ok for spark plugs.
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