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billybaloneey · 08-23-2009

Does any anyone know if plug indexing is worth the effort on the LT5? I think it would be a bit of a challenge to determine where the gap is pointing with them being so recessed under the cam cover. I think the tip could be marked but it would be a lot of effort to check on the direction of the gap. A flash light would definitely be needed

From what I've read...on a traditional engine...the gap is suppose to point between the intake and exhaust valves...but slightly more toward the exhaust valve. Indexing is supposed to be good for a few HP on some engines and on others there is no noticeable effect

Where would the gap point on the LT5...the primary, the secondary, in between, more toward the primary or more toward the secondary?

08-23-2009	#8
billybaloneey Join Date: May 2008 Location: Mauriceville, Texas Posts: 179	Re: PLUG recommendations for 95 ZR1 Does any anyone know if plug indexing is worth the effort on the LT5? I think it would be a bit of a challenge to determine where the gap is pointing with them being so recessed under the cam cover. I think the tip could be marked but it would be a lot of effort to check on the direction of the gap. A flash light would definitely be needed From what I've read...on a traditional engine...the gap is suppose to point between the intake and exhaust valves...but slightly more toward the exhaust valve. Indexing is supposed to be good for a few HP on some engines and on others there is no noticeable effect Where would the gap point on the LT5...the primary, the secondary, in between, more toward the primary or more toward the secondary?