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305 chevy mildly modded spark plug gap??

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Old 09-29-2010, 01:23 AM   #1
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305 chevy mildly modded spark plug gap??

what would be a good place to set my gap for a vortec 305 with a 65k volt ignition, a summit 1103 cam, headers and a holley 4160?

thanks
miguel
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Old 09-29-2010, 02:05 AM   #2
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Re: 305 chevy mildly modded spark plug gap??

Stock spec is fine.
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Old 09-29-2010, 02:20 AM   #3
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Re: 305 chevy mildly modded spark plug gap??

stock spec for the vortec or stock spec for the original l69? because i think the gap for the vortec is .06", and the l69 is around .04"?
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Old 09-29-2010, 05:34 AM   #4
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Re: 305 chevy mildly modded spark plug gap??

Split the difference? lol... in reality, it won't make any noticeable difference if you go .040, .050, or .060.... though a smaller gap will improve life expectancy of various ignition components.
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Old 09-29-2010, 07:16 AM   #5
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Re: 305 chevy mildly modded spark plug gap??

.035" will be fine
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Old 10-01-2010, 08:20 PM   #6
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Re: 305 chevy mildly modded spark plug gap??

I am at 0.40 gap in my 305 with a red cam (1103)from chevy an a 55 throttle body mathced 24 pound injectors ,,,, an i get 19 mph highway..... 12 .31 in a 1/4 mile going to a 75 throttle body i shoud get low 12's in a 1/4 mile....
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