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JamesS
Joined: 05 Jul 2005
Posts: 90
Location: Calgary, Alberta, Canada
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 Posted: Thu Sep 08, 2005 9:27 pm Post subject: Spark Plug ? |
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I've got a 502 Chevrolet stroker (454 iron block), with an Eagle crank, Eagle rods, SRP/JE pistons (10 to 1), Comp cam (don't know the exact specs on it), Crane 1.7:1 roller rockers, Merlin II rectangular port iron heads, Holley intake, Demon 850cfm carb.
My question is which heat range spark plugs (NGKs) should I run in this engine?
I've got 4 choices ranging from a 6 (hottest) to a 9 (coldest) heat range. |
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AR
Joined: 23 Jun 2005
Posts: 181
Location: Iowa, USA
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| Posted: Thu Sep 08, 2005 10:30 pm Post subject: |
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I like AC's !
With a NGK, start with a # 8, always run as cold of a plug that will keep it's nose clean.
If it's long reach, it would be a B8ES. An extended tip would be a BP8ES. |
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JamesS
Joined: 05 Jul 2005
Posts: 90
Location: Calgary, Alberta, Canada
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| Posted: Fri Sep 09, 2005 12:46 am Post subject: |
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AR thanks for the help!
After cross referencing the NGK plug number myself (can't trust many parts counter people these days  ), I came up with ACDelco plug number 438T ( NGK 5673-8 ),... I'll try these first. |
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AR
Joined: 23 Jun 2005
Posts: 181
Location: Iowa, USA
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| Posted: Fri Sep 09, 2005 7:16 am Post subject: |
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| 43's is what I run in a aspirated BBC. |
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