Spark plug help
Thread Starter
Melting Slicks
Joined: Dec 2006
Posts: 2,367
Likes: 0
From: East Oakland CA
Spark plug help
im gonna install my LG headers 2morrow and i want to replace my plugs also. what do you guys recomend? my car is pretty much stock exept for CAI and Exhaust, the car has aprox. 70K miles
TIA
TIA
Team Owner
Joined: Mar 1999
Posts: 22,025
Likes: 192
From: At the beach in little Rhody
TR55 is a copper core plug and conducts better. You in theory have to change more often but a lot of guys are getting a lot of miles from the TR55 plugs, to the point of feeling guilty pulling them out because they look so good.
Tech Contributor
Joined: Jan 2007
Posts: 19,388
Likes: 1,135
From: Dyer, IN
So what is the result of running NGK's? More horsepower? I have not seen a dyno chart for a spark plug change yet.
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Team Owner
Joined: Jan 2007
Posts: 29,063
Likes: 1,839
From: cookeville tennessee
tr55 will work best for you at your stage of the car..
Safety Car
Joined: Aug 2000
Posts: 4,933
Likes: 30
From: San Rafael CA
I don't get this "love affair" with the NGK plugs .....
The GM recommended plug for your engine is the AC Delco 41-985 (GM part # 12571164 ) ....
The plug comes CORRECTLY pre-gapped at 0.040 for your engine .....
see .... http://www.acdelcotechconnect.com/pd..._03D-J-171.pdf
for info on the swap to these plugs from the "original" platinum plugs ....
The GM recommended plug for your engine is the AC Delco 41-985 (GM part # 12571164 ) ....
The plug comes CORRECTLY pre-gapped at 0.040 for your engine .....
see .... http://www.acdelcotechconnect.com/pd..._03D-J-171.pdf
for info on the swap to these plugs from the "original" platinum plugs ....
Tech Contributor
Joined: Jan 2007
Posts: 19,388
Likes: 1,135
From: Dyer, IN
I don't get this "love affair" with the NGK plugs .....
The GM recommended plug for your engine is the AC Delco 41-985 (GM part # 12571164 ) ....
The plug comes CORRECTLY pre-gapped at 0.040 for your engine .....
see .... http://www.acdelcotechconnect.com/pd..._03D-J-171.pdf
for info on the swap to these plugs from the "original" platinum plugs ....
The GM recommended plug for your engine is the AC Delco 41-985 (GM part # 12571164 ) ....
The plug comes CORRECTLY pre-gapped at 0.040 for your engine .....
see .... http://www.acdelcotechconnect.com/pd..._03D-J-171.pdf
for info on the swap to these plugs from the "original" platinum plugs ....
Plenty of 10 second cars running GM Iridium plugs.
Safety Car
Joined: Aug 2000
Posts: 4,933
Likes: 30
From: San Rafael CA
and Napa Auto Parts stores carry them on the shelf. Call your local store (the on-line at http://www.napaonline.com/ doesn't list a price for them) and use the AC Delco part number to get a price.
Racer
Joined: Nov 2006
Posts: 264
Likes: 8
From: Centre, AL
I think people make too much about plugs. Use NGK and be happy. I challenge anyone to feel ANY difference just on using a different plug..copper, iridium etc. Maybe if you can measure combustion in the chamber you can see a difference. In real life, no way.
Racer
Joined: Jul 2006
Posts: 444
Likes: 56
From: DeBary Florida
You're gonna love those LG streets I just had them installed on my '04 not more than a month ago along with a low temp thermostat, the ever popular NGK TR55 plugs ($2.49 ea)and a Dyno Tune. Something else you may or may not want to consider are the Locking Header bolts. They only cost around $40.00 and prevent the header bolts from backing out. The shop I use recommended them as they have seen some of the bolts on occassion back out. My feeling was I got this much in it I'm not going to worry about the xtra $40.00. (peace of mind).
Hope this helps.