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What spark plugs for h/c ls1

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Old 05-15-2009, 10:04 AM
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Default What spark plugs for h/c ls1

What spark plugs for an ls1 with h/c and extra compression? Heads are milled to 61 cc or does that even make a diffrence? I here alot of people running ngk 55, is this a good fit?
Old 05-15-2009, 01:38 PM
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TR6 here
Old 05-16-2009, 06:21 AM
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NGK TR55 gapped at .055
Old 05-16-2009, 07:27 AM
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TR-55's on AFR205's miled to 60cc and a cometic .045 with SCR of 11.48 and DCR of 8.70 on 91 octane with 26 degrees total timing and all is fine so far.




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