plug gap
Thread Starter
Staging Lane
Joined: Mar 2010
Posts: 69
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plug gap ive got an 02 ws6 with 38k miles.
yes i know its early to do a plug change with the ac delcos being a 100k plug but im getting missfires ;( so i bought ngktr55s and was wondering wat to gap them at.
Mods-
Qtp cutout
Mti lid
slp exhaust
K & N filter
and soon to be lt headers, port polish throttle body, gears, tune
Thanks.
yes i know its early to do a plug change with the ac delcos being a 100k plug but im getting missfires ;( so i bought ngktr55s and was wondering wat to gap them at.
Mods-
Qtp cutout
Mti lid
slp exhaust
K & N filter
and soon to be lt headers, port polish throttle body, gears, tune
Thanks.
I believe .050, if memory serves me.......
EDIT: yea here u go, found this is FAQ https://ls1tech.com/forums/1740914-post35.html
EDIT: yea here u go, found this is FAQ https://ls1tech.com/forums/1740914-post35.html
Joined: Nov 2001
Posts: 34,661
Likes: 2,591
From: Schiller Park, ILL Member: #317
I think that's for the new style of plug that AC Delco produces for these motors (new as compared to what came stock in these motors).
If you're using an NGK TR55 though, the gap should be somewhere in the .050 to .060 range for best performance.
If you're using an NGK TR55 though, the gap should be somewhere in the .050 to .060 range for best performance.
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Joined: Nov 2001
Posts: 34,661
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From: Schiller Park, ILL Member: #317
Stock gap was .060 on the factory platinum plugs. Several years ago, GM released a new iridium plug for the LS1 that comes gapped at .040, and Gm does not recommend changing the gap on that specific plug.
The NGK TR55 plug comes gapped from NGK at .059.
The NGK TR55 plug comes gapped from NGK at .059.
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