spark plug heat ranges

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07-02-2007, 09:46 AM

66f100352

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spark plug heat ranges

What is the next step colder from the 45's? Is it the 124's or are they two steps colder..and for that matter which ones are two steps colder?

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07-02-2007, 10:11 AM

NumberDummy

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As original 1966 352 ~ BF-42; BRF-42. Colder: BF-32; BRF-32.

R = Resistor

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07-02-2007, 10:22 AM

Ford428CJ

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goes from 45's (hot) to 124's (2 steps colder then the 45's) and 113 (no longer make but 2 steps colder the the 124's)

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07-02-2007, 07:35 PM

66f100352

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so there's no just one step colder?

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07-02-2007, 07:56 PM

Ford428CJ

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"NO".............. Sorry

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07-02-2007, 09:49 PM

Putt

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I thought there was a number 44 Autolite??

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07-02-2007, 09:54 PM

Ford428CJ

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I think maybe a 46 but I don't remember and I will have to dig in the books for that info.

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spark plug heat ranges

spark plug heat ranges

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