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What spark plug heat range?
#1621275
05/17/14 07:48 PM
05/17/14 07:48 PM
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Joined: Nov 2003
Posts: 10,384 Upstate NY
Bigcube
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I Live Here
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OP
I Live Here
Joined: Nov 2003
Posts: 10,384
Upstate NY
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I used a NGK -9 heat range for 15:1 compression. Should I change to a -8 for 11:1 and 93 octane?
Jim
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Re: What spark plug heat range?
[Re: 440W8 Duster]
#1621277
05/17/14 07:58 PM
05/17/14 07:58 PM
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Joined: Sep 2003
Posts: 2,008 Sweet Home Alabama
MRMOPAR622
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top fuel
Joined: Sep 2003
Posts: 2,008
Sweet Home Alabama
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The Champion C57CX is Perfect...I'm sure if you cross that number over to the NGK you would have the Prefect Heat Range.And at 15.1 CR gap the plugs .022-.025 that will make a Big Improvement.
PS Sorry I mis-read you post that plug is for a 15-1 CR and I have never run a 11-1 CR on 93 octane before.Again Sorry for the mistake.
Last edited by MRMOPAR622; 05/17/14 08:03 PM.
"To Be The Man'You Have Got To Beat The Man"
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Re: What spark plug heat range?
[Re: Bigcube]
#1621280
05/18/14 03:34 AM
05/18/14 03:34 AM
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Joined: Aug 2010
Posts: 167 mi
dirty magnum
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Joined: Aug 2010
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Quote:
I used a NGK -9 heat range for 15:1 compression. Should I change to a -8 for 11:1 and 93 octane? [/quote i use 7s for 15:1 i use 7s for 15:1
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Re: What spark plug heat range?
[Re: ademon]
#1621282
05/18/14 09:00 AM
05/18/14 09:00 AM
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Joined: Nov 2009
Posts: 2,177 ill
dennismopar73
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Joined: Nov 2009
Posts: 2,177
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Why change heat range ? Fix issues x motor to fat. Repair carb or fuel.delivery Getting oil contaminant in combustion chamber , fix it Heat range is only the temp that the plug disperse to keepit firing. Not actual cyl.temp Not all plugs heat rang alike NGK http://www.ngksparkplugs.com/tech_support/spark_plugs/p2.asp?mode=nml
Last edited by dennismopar73; 05/18/14 09:05 AM.
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