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AC 45 plug question

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Old Nov 23, 2021 | 10:24 AM
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From: Loveland
Default AC 45 plug question

I have a 327 350 hp 11:1 compression engine. I have AC-45 plugs in it now. Has anybody switched from the AC-45 to the AC-45S and noticed an improvement in power? It seems the only engine that might have an issue with the piston hitting the plug is the high compression engines. I have researched on here and really haven't seen a direct comparison 45 to 45S.
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Old Nov 23, 2021 | 10:29 AM
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I can't imagine it would make a noticeable difference in power. If that were the case the regular 45 plugs would show incomplete combustion.
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Old Nov 23, 2021 | 10:32 AM
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It is very unlikely you would see an increase in power from a projected tip plug......
The projected tip typically offers a slight resistance to detonation and runs a bit cleaner......they are also easier to read. But don't go buying a set because you think you need them.....you will not notice a shred of difference seat of pants.
If you want to upgrade.....run a NGK V-power plug....but even then, only if you need them.

Jebby
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Old Nov 23, 2021 | 10:49 AM
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Thanks,,,,, that's what I was thinking. Kind of like the "car wash theory". Man, my car sure runs nice after I get it all cleaned up.

Last edited by kodpkd; Nov 23, 2021 at 05:02 PM.
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Old Nov 23, 2021 | 11:08 AM
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Placebos are everywhere.....an integral part of American culture.
One of the first I experienced as a teen was..."Hard to Beer, you're in the Clear....Beer to Hard, you're in the Yard!"

Jebby
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