What size gap?

[BillyBob]

I need to change my spark plugs and wires tomorrow. What size gap should I make the plugs? the ignition is stock.. not big mods on the truck (yet). I figure .45 or less?

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[bee32]

When you buy the plugs ask them there. It varies between different plugs and engines.

Brian
83 K-5 4" on 33's

 

[bigblue]

.35 -&gt; 87 350

Surfing is Life...

 

[Zepplin]

When a bought a set of Champions I think the gap was .035" but, yes it does vary on the manufacturer.

74 Blazer
Zepplin
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[1975k5]

both my Chilton and Haynes manual say .060

 

[Burt4x4]

I set my Bosh Plat. to .45 for my 350

72K5

Led Zeppelin

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[ChevyCaGal]

Man that seems off unless you have like a MSD in there or something... I gap mine at .35 to .40... it seems that gap at .60 is too wide and will be too hot to work right correct?

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[dyeager535]

When GM first started using HEI they went way overboard on gap, then dropped it way back down the year afterwards or so. Olds ran .060 up until the very end, and since its the same HEI system, unless the electrode hits, you *could* run that gap on a Chev too. (but run what the factory recommends)


Dorian
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