spark plug heat index

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09-15-02 | 01:11 AM

beezrx7

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From: Sacramento, CA

spark plug heat index

hey i was just wondering if anybody knew the difference in the spark plug heat indexes 9, 10, and 11 when buying spark plugs?

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09-15-02 | 02:12 AM

Kahren

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From: CT

the hotter teh engine runs the colder teh plug shoudl be, u will find that a lot of peopel on this forum use 9s all around. if you go road racign u might wanna try 10s on the trailing and 9s on the leading.

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09-15-02 | 02:43 AM

beezrx7

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From: Sacramento, CA

thanx kahren

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