Spark Plugs
Thread Starter
Le Mans Master
Joined: Aug 2003
Posts: 9,298
Likes: 4
From: American Canyon Lethal Injection
Spark Plugs
I posted this question in S&T section also.
Are the AC/Delco Iridium Professional spark plugs better than the NGK TR6 spark plugs for daily driving?
Thanks,
Rsty
Are the AC/Delco Iridium Professional spark plugs better than the NGK TR6 spark plugs for daily driving?
Thanks,
Rsty
Last edited by SLPRC5; Apr 25, 2006 at 03:51 PM.
Thread Starter
Le Mans Master
Joined: Aug 2003
Posts: 9,298
Likes: 4
From: American Canyon Lethal Injection
Originally Posted by C5SteveMR
I found the new stock AC Pre gaped @40 plugs from the dealer work best. Do not attemt to gap the irridium plugs. Good luck
Race Director
Joined: Apr 2004
Posts: 16,135
Likes: 5
From: Newberry FL
Cruise-In VIII Veteran
St. Jude Donor '07
The NGK TR6s are typically the plug you want when you are running some sort of FORCED INDUCTION setup (ie Nitrous, SC, etc), the NGK 55s are a nice plug, but I have seen and have had problems with the tips backing out, they are a screw on tip. I am not a fan of that at all.
I went back to the ACDELCO Irdiums and appreciate the plug alot more, because I don't have to worry so much about checking the plug tips over and over again. Plus, they are pregapped by the manufacture and "ARE NOT" to be adjusted. I think they are a great plug for Daily Driving and that is what I use in my car and I drive it every day.
Micah
I went back to the ACDELCO Irdiums and appreciate the plug alot more, because I don't have to worry so much about checking the plug tips over and over again. Plus, they are pregapped by the manufacture and "ARE NOT" to be adjusted. I think they are a great plug for Daily Driving and that is what I use in my car and I drive it every day.
Micah
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
2027 Corvette vs The World: Every C8 vs Its Closest Competitor
Joe Kucinski
10 Most Common Corvette Problems of the Last 20 Years!
Joe Kucinski
5 MOST and 5 LEAST Popular Corvette Model Years in History!
Joe Kucinski
Thread Starter
Le Mans Master
Joined: Aug 2003
Posts: 9,298
Likes: 4
From: American Canyon Lethal Injection
Originally Posted by mph1972
The NGK TR6s are typically the plug you want when you are running some sort of FORCED INDUCTION setup (ie Nitrous, SC, etc), the NGK 55s are a nice plug, but I have seen and have had problems with the tips backing out, they are a screw on tip. I am not a fan of that at all.
I went back to the ACDELCO Irdiums and appreciate the plug alot more, because I don't have to worry so much about checking the plug tips over and over again. Plus, they are pregapped by the manufacture and "ARE NOT" to be adjusted. I think they are a great plug for Daily Driving and that is what I use in my car and I drive it every day.
Micah
I went back to the ACDELCO Irdiums and appreciate the plug alot more, because I don't have to worry so much about checking the plug tips over and over again. Plus, they are pregapped by the manufacture and "ARE NOT" to be adjusted. I think they are a great plug for Daily Driving and that is what I use in my car and I drive it every day.
Micah
Race Director
Joined: Jul 2005
Posts: 11,308
Likes: 1
From: The Beautiful Greater Bay Area California
Originally Posted by mph1972
The NGK TR6s are typically the plug you want when you are running some sort of FORCED INDUCTION setup (ie Nitrous, SC, etc), the NGK 55s are a nice plug, but I have seen and have had problems with the tips backing out, they are a screw on tip. I am not a fan of that at all.
I went back to the ACDELCO Irdiums and appreciate the plug alot more, because I don't have to worry so much about checking the plug tips over and over again. Plus, they are pregapped by the manufacture and "ARE NOT" to be adjusted. I think they are a great plug for Daily Driving and that is what I use in my car and I drive it every day.
Micah
I went back to the ACDELCO Irdiums and appreciate the plug alot more, because I don't have to worry so much about checking the plug tips over and over again. Plus, they are pregapped by the manufacture and "ARE NOT" to be adjusted. I think they are a great plug for Daily Driving and that is what I use in my car and I drive it every day.
Micah
Melting Slicks
Joined: Jan 2003
Posts: 2,056
Likes: 0
From: monroe city mo
Originally Posted by mph1972
The NGK TR6s are typically the plug you want when you are running some sort of FORCED INDUCTION setup (ie Nitrous, SC, etc), the NGK 55s are a nice plug, but I have seen and have had problems with the tips backing out, they are a screw on tip. I am not a fan of that at all.
I went back to the ACDELCO Irdiums and appreciate the plug alot more, because I don't have to worry so much about checking the plug tips over and over again. Plus, they are pregapped by the manufacture and "ARE NOT" to be adjusted. I think they are a great plug for Daily Driving and that is what I use in my car and I drive it every day.
Micah
I went back to the ACDELCO Irdiums and appreciate the plug alot more, because I don't have to worry so much about checking the plug tips over and over again. Plus, they are pregapped by the manufacture and "ARE NOT" to be adjusted. I think they are a great plug for Daily Driving and that is what I use in my car and I drive it every day.
Micah
Thread Starter
Le Mans Master
Joined: Aug 2003
Posts: 9,298
Likes: 4
From: American Canyon Lethal Injection
Originally Posted by bowtiebubba
I just put the AC Delco professional iridium plugs in my car. The box says to set gap per vehicle specification and mine called for 60 thousands,so thats what i gapped them at. Is this wrong?
Safety Car
Joined: Oct 2000
Posts: 4,949
Likes: 10
From: Monticello MN
Originally Posted by RstyNutz
Yes, they come pre-gapped at .040 and should be left at this gap. I don't know how your performance will be with a .060. Another reason not to gap the iridium plugs is because the tips are very ez to ruine.
Ed
Thread Starter
Le Mans Master
Joined: Aug 2003
Posts: 9,298
Likes: 4
From: American Canyon Lethal Injection
Ha Ha..well today I had a set of Iridium plug put in to replace the NGK TR6 plugs. Let me tell you; the guy that installed them told me right off the bat he saw what I meant by an improvement with the Iridium plugs, he could feel the response. Let me say when I jumped on the freeway or even before I got there I could feel a rapid improvement.
I want to thank all of you for your input..
Rsty
I want to thank all of you for your input..
Rsty
Last edited by SLPRC5; Apr 29, 2006 at 01:29 AM.
Pro
Joined: Oct 2005
Posts: 733
Likes: 0
From: Vanceboro NC
Originally Posted by RstyNutz
Yes, they come pre-gapped at .040 and should be left at this gap. I don't know how your performance will be with a .060. Another reason not to gap the iridium plugs is because the tips are very ez to ruine.
Thread Starter
Le Mans Master
Joined: Aug 2003
Posts: 9,298
Likes: 4
From: American Canyon Lethal Injection
Originally Posted by willyfastz
As long as his coil packs are up to it his performance is probably better. With the wider gap it takes a hoter spark to fill the gap, which means it will burn more of the gas in the CC. Hence the reason his manual reccomends .060. Most of the GM vehicles call for a wide gap.
Pro
Joined: Oct 2005
Posts: 733
Likes: 0
From: Vanceboro NC
Originally Posted by RstyNutz
This is the new standards in the industry to replace the plugs in C5s with the pre-gapped .040 AC/Delco Iridium Professional Plugs. Reports are they work very well.
Melting Slicks
Joined: Nov 2005
Posts: 2,071
Likes: 0
From: clackamas oregon
when i pulled mine out to install headers. they had a HUGE gap. like 80 or so. i tapped them, down to 60. did i mess up?? how do i know what plug they are. they have the littlest tip i have ever seen on a plug. the color was a light brown/ white. the tip was like big around as a sharp pencil. are these way worn out or is that normal?
Le Mans Master
Joined: Apr 2002
Posts: 7,281
Likes: 5
From: Boston
Originally Posted by rgtkst
when i pulled mine out to install headers. they had a HUGE gap. like 80 or so. i tapped them, down to 60. did i mess up?? how do i know what plug they are. they have the littlest tip i have ever seen on a plug. the color was a light brown/ white. the tip was like big around as a sharp pencil. are these way worn out or is that normal?