Ngk Tr55
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Instructor
Joined: Apr 2005
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Ngk Tr55
Does anyone know if the NGK TR55's come pre-gapped? I bought the V power NGK's yesterday and need to know if I should gap them to the stock .60 or what. Please advise. My car has no mods other than Z06 mufflers.
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They do but they are inconsistent..I ALWAYS gap my plugs....and I think the NGKs are gapped between .050 and .060 I personally have mine at .055
Team Owner
Joined: Oct 2001
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From: Boynton Beach Florida
St. Jude Donor '07-'12, '20
Originally Posted by pewter99
They do but they are inconsistent..I ALWAYS gap my plugs....and I think the NGKs are gapped between .050 and .060 I personally have mine at .055
Race Director
Joined: Jul 2005
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From: The Beautiful Greater Bay Area California
Try 0.055. Interestingly, did you know that the stock o.e. delco 41-985 spark plugs are set at 0.04? The Chevrolet Dealership corvette techs are instructed not to change this gap due to new research that produced a TSB that now recommends the contrary to the 0.060 posted in our Corvette C5 owners manuals. Therefore, unless you are supercharging, or, consistently juicing with nitro, do try the 0.055 setting. And, do let us know how this turns out for you. Good luck. 
Le Mans Master
Joined: Aug 2005
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From: FL
Thanks! I don't really want to be testing things out on my car though lol. Has anyone done this for a long period of time. My car is not heavily modded no SC or Turbo or nitrous.
I guess the .06 gap was too much causing a bigger flame and it was maybe going out in the high rpms causing breakup?
If I don't hear otherwise I will gap them at .055
I guess the .06 gap was too much causing a bigger flame and it was maybe going out in the high rpms causing breakup?
If I don't hear otherwise I will gap them at .055
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Racer
Joined: Sep 2004
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St. Jude Contributor '04
Originally Posted by pewter99
They do but they are inconsistent..I ALWAYS gap my plugs....and I think the NGKs are gapped between .050 and .060 I personally have mine at .055
Mine is gapped at .055 as well.
Racer
Joined: Sep 2004
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St. Jude Contributor '04
Originally Posted by Oo Joe 24 oO
so is NGK TR55 the stock plug?? Im changing my spark plugs this weekend in my 02 z06 - also the stock gap should be between .050-.060??
Burning Brakes
Joined: Apr 2005
Posts: 753
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From: Oceanside CA
Originally Posted by pewter99
They do but they are inconsistent..I ALWAYS gap my plugs....and I think the NGKs are gapped between .050 and .060 I personally have mine at .055
Always check the gap.
Safety Car
Joined: Oct 2000
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From: Monticello MN
Originally Posted by Oo Joe 24 oO
so is NGK TR55 the stock plug?? Im changing my spark plugs this weekend in my 02 z06 - also the stock gap should be between .050-.060??
Ed
