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07-19-2015, 07:53 PM
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#1 |
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Registered User
Join Date: Jul 2013
Location: Anniston, AL
Posts: 2
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HEI conversion spark plug questions
I have a 72 c10 350 I'm swapping over to HEI and I can't seem to find a definitive answer in whether I should swap plugs or regap my stock plugs. If it matters, I'm running an aluminum intake, holley street dominator, and a mild cam (everything else is pretty stock). I'm sure this has been answered before, just can't seem to find it on here.
Any help is greatly appreciated Posted via Mobile Device |
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07-19-2015, 08:04 PM
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#2 |
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Registered User
Join Date: Jul 2010
Location: MD
Posts: 1,937
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Re: HEI conversion spark plug questions
Re-gap to 0.045" will be fine.
__________________
1969 c-10 Step Side Long Bed. I-6 250cid =  = 1969 Pontiac GTO hard top. 400, 4-speed.
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07-19-2015, 08:08 PM
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#3 |
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Registered User
 
Join Date: Feb 2013
Location: Spring Hill, Florida
Posts: 465
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Re: HEI conversion spark plug questions
when I swapped to an HEI I simply regaped to .045 and changed out the plug wires to larger gauge. 8.0 or 8.5 I don't remember.
if your current plugs are in good shape you can always replace them later, then again no reason not to replace them as plugs are pretty inexpensive. |
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07-19-2015, 08:15 PM
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#4 |
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Registered User
Join Date: Jul 2013
Location: Anniston, AL
Posts: 2
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Thank you for the replies, I'll grab some quality wires and regap my plugs
Posted via Mobile Device |
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07-19-2015, 09:57 PM
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#5 |
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20' Daredevil (Ret)
Join Date: May 2003
Location: Jefferson State
Posts: 13,690
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Re: HEI conversion spark plug questions
Late to the party but I agree with the above..... stock plugs, .045 gap, and HEI wires which IIRC are 8mm (stock wires are 7mm).
__________________
- Mike - 1972 K20 LWB 350/350/205 RIP El Jay |
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07-20-2015, 03:59 PM
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#6 | |
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Account Suspended
Join Date: Jul 2015
Location: Bisbee AZ
Posts: 43
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Re: HEI conversion spark plug questions
Quote:
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07-20-2015, 04:04 PM
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#7 |
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Registered User
Join Date: May 2013
Location: WEST PALM FLORIDA
Posts: 1,174
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Re: HEI conversion spark plug questions
regap ,,, your plugs are specific to your heads
__________________
68 Long Fleet , ly6 , turbo 350 , 3-5 drop , original paint , front discs 67 Small window , 7 foot bed , tweaked 6.0 LSX 2004R Medium Olive 58 Apache fleet , 235 , offy intake , dual exhaust , 4 on the floor , red/white 69 Long Fleet , Custom , 6.0, 4l60 , AC , Medium Olive |
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07-27-2015, 11:45 AM
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#8 |
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Registered User
Join Date: Jun 2015
Location: Westminster, Colorado
Posts: 14
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Re: HEI conversion spark plug questions
My engine is from a 78 so I gapped them to that engine, which was .043". Starts and runs fine, need to get to the carb next (oh and the exhaust and...)
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07-20-2015, 04:03 PM
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#9 |
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Registered User
Join Date: Jul 2015
Location: Dallas, TX
Posts: 167
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Re: HEI conversion spark plug questions
Hmmm, so which is it then? Someone had mentioned that i should do mine at .045 (which I did yesterday). Do I need to redo them all?
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