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Plug selections...

Old Mar 4, 2006 | 11:06 AM
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Default Plug selections...

Whats the general rule of thumb for selecting spark plug heat range? We're trying to find a good plug for a 346 - 23x-24x cam ~11.6:1 CR making 485-505rwhp. I am leaning towards iridium "6s". And no this is not my motor. We're running TR7IX in mine.
Phil
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Old Mar 4, 2006 | 11:10 AM
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on my 244/248 cam I have a .050 gap. If that helps.
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Old Mar 4, 2006 | 11:16 AM
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Running TR55's gapped .045 in my 402 with a 248/254 629/622 113. 11:1.
I might be wrong though...but I just went with what worked before.
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Old Mar 4, 2006 | 11:31 AM
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TR6's gapped .042>.045
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Old Mar 4, 2006 | 11:39 AM
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If you guys could post your RWHP numbers that would be great...Hopefully this will end up as a sticky.
Phil
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Old Mar 4, 2006 | 11:42 AM
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RWHP have little to do with plug choice. DCR, SCR and fuel used are the determining factors.
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Old Mar 4, 2006 | 11:56 AM
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Very very true
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