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08-15-2007, 09:41 PM
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#1 |
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Registered User
Join Date: Aug 2007
Location: Santa Rosa CA
Posts: 48
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Spark plugs and gap after HEI conversion
After doing a HEI conversion on a 73 c20, 454, should I use a different spark plug and should the gap be changed to 60?
Motor is stock except for a mild cam and edelbrock performer carb 750cfm. Thanks |
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08-15-2007, 11:22 PM
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#2 |
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The Crazy Machanic
Join Date: Jan 2007
Location: Nokesville Va
Posts: 1,437
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Re: Spark plugs and gap after HEI conversion
as far as i know i would say no. ive done a pionts to hei and never worried about the plugs gap., just been what ever stock would be.
__________________
*1986 Sliverado longbed 400 small block mean as hell, 700r4 trans (5 speed coming one day)  * 1970 chevelle 2dr sedan Latest update June 24 2007.  *1957 4 door stationwagon - pink all original needing a good restore (body great, floors bad)  newest additions 1965 shortbed fleet great granddads. Been told im nuts to bring it back from the dead (still going to happen) plans-all stock with a turbo 292 inline 3 speed column shift. and thats it big block 427 and 5 speed trans and ford 9 inch theyhave no home yet thinking what to put them in and a 79 c60 trash truck um no idea i have one
Last edited by Srubydo1986; 08-15-2007 at 11:23 PM. |
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08-16-2007, 02:17 AM
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#3 |
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Registered User
Join Date: May 2003
Location: Shreveport LA
Posts: 3,170
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Re: Spark plugs and gap after HEI conversion
Use the same plugs, but gap them to .045". Old factory specs for early HEI motors called for .060", but they redid the specs after they started eating plug wires prematurely.
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