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indexing plugs for power

1480 Views 8 Replies 6 Participants Last post by  CHITOWNHUSTLER
what have you guys found in power with indexing spark plugs??

looking to try this on an approx 800 hp pump gas 548" bbc

has nothing to do with piston dome clearance,just talking about pointing the plug in a way where the ground strap isn't orientated in the way from the air fuel flow path

also,are you pointing the gap so its facing the intake valve or facing between the intake and exhaust valves,which in my guess isn't all that critical

1 - 2 of 9 Posts
Spark plug indexing is one of those things that, by itself is almost insignificant. But adding up all of those little things can result in somewhat of a power increase . . . .
As long as your piston dome to plug electrode clearance is not an issue, then the plug gap should be pointed towards the intake valve.
How do you index your plugs?
Do you purchase many plugs to get the correct index?
Or do you use the indexing washers to orient the plugs?

Use the washers.
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