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Old 09-29-2010, 09:48 PM
460boating 460boating is offline
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Default best spark plug to run?

This may be a a dumb question but I'm not sure what plug is best for my application.I have a basic 460 marine motor.alum intake holly 600 and stock ported heads.I have autolite 25's in it now but was told it is the wrong plug and I should be running 45's??? Why? what's the difference?Is this info right or wrong?
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Old 09-29-2010, 11:14 PM
308man 308man is offline
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Just me but I have always run NGK plugs. Never had a problem with these.
Truck Pulling; Because no one else understands why a 460 "gotta" turn 7500 rpms!!
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Old 09-30-2010, 06:04 AM
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crittersf1 crittersf1 is offline
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What heads are you running? 45's will not physically inter-change with 25's
If you're not living on the edge you're taking up too much space!
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