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LT1-LT4 Modifications
hotter or colder plug?

LT1-LT4 Modifications 1993-97 Gen II Small Block V8

hotter or colder plug?

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Old

Jan 2, 2005 | 11:41 PM

#1

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Staging Lane

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From: Illinois

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hotter or colder plug?

I am running about 12 to 1 and was wondering whether to go with a hotter or colder plug? I broke the motor in on the stock heat range plugs but I am am going to up upgrading as soon as I get exhaust on the car. So, which is better hotter or colder for high cr and why? I have heard it both ways from people that should know what they are talking about.

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Jan 5, 2005 | 11:34 PM

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Staging Lane

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No one knows for sure? Any ideas?

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Jan 6, 2005 | 12:33 PM

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Teching In

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Hotter = possible detonation
Cooler = increase deposits and or fouling

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Jan 6, 2005 | 01:24 PM

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I ran one colder heat range on my 12:1 396ci motor with no problems at all.
Jason

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Jan 6, 2005 | 04:37 PM

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try cooler out and see, you may not need to change at all from stock. youll just need to test it out and find out what works.

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