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spark plugs for 466 with 14 to 1 comp

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Post  57ford custom 24th May 2017, 20:16

Hi guys I am looking for a spark plug heat range for my 466 14 to 1 drag car. It has iron cobra jet heads and flat tappet cam and I am looking for an NGK plug heat range number. I use 110 octane in this and the plugs in it now are very old autolite's. I just got it running for this year and it seems to have a little miss so gotta start somewhere.
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Post  rmcomprandy 25th May 2017, 01:19

57ford custom wrote:Hi guys I am looking for a spark plug heat range for my 466 14 to 1 drag car. It has iron cobra jet heads and flat tappet cam and I am looking for an NGK plug heat range number. I use 110 octane in this and the plugs in it now are very old autolite's. I just got it running for this year and it seems to have a little miss so gotta start somewhere.

IF it is kept below 180 degrees, A 7 or 8 depending upon if it is driving or racing.

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Post  57ford custom 25th May 2017, 12:40

which one is the coldest the A7 or A8
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Post  gt350hr 25th May 2017, 13:03

The 8 is colder on NGK plugs. The colder the better with 14-1 on 110 octane.

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Post  57ford custom 25th May 2017, 21:14

Thank you I will order a set tomorrow and start with number 8's
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Post  460bronco 25th May 2017, 22:07

I'm guessing if his operating temp gets above 180 he would need an even colder heat range?
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spark plugs for 466 with 14 to 1 comp Empty Now where can I find a set of these

Post  57ford custom 26th May 2017, 16:35

My local Autozone is no help so far.
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