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LS7 H/C/I - NB - Spark Plugs?!?! Which ones

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Old 01-31-2022, 09:55 PM
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Default LS7 H/C/I - NB - Spark Plugs?!?! Which ones

So I have 3 Choices to pick from I have all 3 on hand just really dont know which ones I should at least try first? In the end ill prob try then all eventually. All will be gapped to .040"

1. TR6 -NGKs - tried an true i know..
2. Denso 5091 - Double Platinum Plugs
3. LKAR7BIX - 93501 - Iridium.

Build Notes:
So a little about the build NA - Motor, 427 ls7 rotating assembly. Heavly Ported GM ls7 heads done by NGP.... Custom gound Pat G cam. .635 lift 230/246. Long tube headers 1-7/8 - Stock Intake thats been Heavily ported as well N/W 102 TB.

Thoughts Suggestions?

TIA - Chris
Old 02-02-2022, 10:21 AM
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I’m going with the tr6 in my 403. Pay spec’d my cam and he’s going to remote tune my car. I have trickflow 235 head which have a very efficient combustion chamber so the tr6s are recommended. I called pat to talk about it and he’s said run those plugs and set the gap to .040. I’d call your tuner too and see what they suggest.
Old 02-02-2022, 10:24 AM
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Yeah Pat speced my cam as well. Im the tuner for now and i installed my tr6s last night.

As I said ill end up trying them all eventually for my own understanding an data.

Ill update this old thread as those times come!

Thanks for the feedback sir!

Chris
Old 02-02-2022, 01:23 PM
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It will be nice to see the result of all three plugs and see if much changes
Old 02-03-2022, 07:41 PM
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I like to base plugs on compression and usage. What static compression are you shooting for?
Old 02-03-2022, 09:01 PM
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Originally Posted by Che70velle
I like to base plugs on compression and usage. What static compression are you shooting for?
Hello Che70velle,

Static should come in right at or about 11.7 ish

Chris
Old 02-11-2022, 08:00 PM
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I’m running NGK TR7ix in the 434. 12.42:1 comp. LS7 top end. Between the 3, I’d go TR6, and keep an eye on things. Should be ok.



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