Spark plugs
Thread Starter
Drifting
Joined: Feb 1999
Posts: 1,481
Likes: 1
From: San Diego CA
Spark plugs
Okay, it's been a while and I'm out of touch with the current spark plug gosip and rumors...
I think I need to change my plugs. I've had NGK TR-55 copper plugs on for about 10,000 miles (with a fair amount of racing and a lot of WOT and high RPM street driving). I haven't pulled them to check yet but from the way the car is running (a little lumpy at idle and excessive unburnt fuel smell after WOT and high RPM runs) I think they may be past their prime.
Since I don't race the car anymore, I'm not so hypersensitive to the spark plug I install. I want something reliable that will last so I don't have to mess with it.
I see GM has a new pre-gapped Iridum plug, plus all the usual players (Bosch 4 prong, etc.). Any thoughts on what the best plug is for the street (mild mods)?
Thanks!
Mike
I think I need to change my plugs. I've had NGK TR-55 copper plugs on for about 10,000 miles (with a fair amount of racing and a lot of WOT and high RPM street driving). I haven't pulled them to check yet but from the way the car is running (a little lumpy at idle and excessive unburnt fuel smell after WOT and high RPM runs) I think they may be past their prime.
Since I don't race the car anymore, I'm not so hypersensitive to the spark plug I install. I want something reliable that will last so I don't have to mess with it.
I see GM has a new pre-gapped Iridum plug, plus all the usual players (Bosch 4 prong, etc.). Any thoughts on what the best plug is for the street (mild mods)?
Thanks!
Mike
Le Mans Master
Joined: Oct 2004
Posts: 9,369
Likes: 4
From: Zephyrhills, Florida
St. Jude Donor '06-'07-'08-'09-'10-'11-'12-'13
Being essentially lazy, I opted for the new iridiums........ supposed to go 100,000 mi....... I'll checkum every 30 and see..............
Race Director
Joined: Jul 2005
Posts: 11,308
Likes: 1
From: The Beautiful Greater Bay Area California
Personally, I have used the Bosch Platinum +4's for years, and the Platinum series plugs on all my Vettes since the nineties, for that matter. However, the NGK TR 55's are a well proven, and, great low cost value spark plug alternative. 
