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New spark plugs

Old 06-25-2012, 07:21 PM
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New spark plugs

Im putting new plugs in my 2000 ss camaro they are AC delco 41-110 they are set at 040 should change them to 060.
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Old 06-26-2012, 12:36 AM
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Re: New spark plugs

No experience with the ac delco's, I use NGK's myself, tr6's or 55's if a colder plug is needed. Seems a lot of other people do as well.

.040 is probably a bit toght for a mostly stock NA combo. I would however, gap them tighter than GM's f-body recommendation: try .050. People report better/smoother idle, and maybe even a tiny bit better performance with that gap. The Vette's are also gapped to that spec, so it wont harm anything.
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Old 06-30-2012, 04:50 PM
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Re: New spark plugs

Got the 41-110's in my 99 Z28 set at the stock (.040) gap and haven't noticed that much of a difference at all to be honest. Originally had the stock 41-952 (.060 gap) in there. A lot of guys in my area run the ngk tr55's and love em.
The reason gm went with the 41-110's was for a more "fuel" economical aspect. Before the plug change on my car I was getting an average of 27mpg, and it stayed the same after as well.
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Old 07-02-2012, 06:38 PM
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Re: New spark plugs

Originally Posted by BigMac76 View Post
Got the 41-110's in my 99 Z28 set at the stock (.040) gap and haven't noticed that much of a difference at all to be honest. Originally had the stock 41-952 (.060 gap) in there. A lot of guys in my area run the ngk tr55's and love em.
The reason gm went with the 41-110's was for a more "fuel" economical aspect.
Ummm... Stock gap is .060" GM updated the recommended plugs to an iridium tip gapped at .040" for idle quality, not fuel mileage.

To the OP: NEVER CHANGE THE GAP ON AN IRIDIUM PLUG!!!!
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