what spark plug gap for 408

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Aug 9, 2009 | 09:11 PM

cxpcman

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what spark plug gap for 408

hi im using tr55 spark plugs .. for my 408 engine somebody can help ? all i can find is for nitrous

Aug 10, 2009 | 01:53 AM

LS6427

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.045 - .055...you pick, its all the same for a stock LS1 up to built 427ci...same gaps. Gaps change with nitrous, forced induction and serious builds like race gas 850 FWHP engines.

Just do .050 and you'll be good.

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Aug 10, 2009 | 02:36 AM