What size plug gap are you running on your 350? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**swervin ervin** · 01-09-2004, 04:06 PM

Personally, I never heard of or seen a stock GM vehicle with .060 plug gap. .045 is the biggest gap I've heard of. To run a .060 gap, you would need a real high energy ignition system. More than GM ever put into any of their stuff.

Here's the ticket. If you are running a stock GM HEI coil in the cap distributor, gap the plugs at .045. If you still have a miss, and as long as the plugs are new, buy a set of wires.

01-09-2004, 04:06 PM	#1
swervin ervin You get what you pay for Join Date: Dec 1999 Location: Cherryville, NC Posts: 4,798	Personally, I never heard of or seen a stock GM vehicle with .060 plug gap. .045 is the biggest gap I've heard of. To run a .060 gap, you would need a real high energy ignition system. More than GM ever put into any of their stuff. Here's the ticket. If you are running a stock GM HEI coil in the cap distributor, gap the plugs at .045. If you still have a miss, and as long as the plugs are new, buy a set of wires.



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