SPARK PLUG QUESTION.

[1JEWLDSSRS]

Alright folks, just need a little info please, I changes my spark plugs in my 2011 SS after 70k miles on them, I drive the car hard. I went with the NGK TR6IX because I thought I had the NGK TR6's in there to begin with after the car was tuned 5 years ago, my tuner couldn't remember what he installed. I have a CAI, ported TB. longtubes and an off road mid and xpipe. The plugs that were in there when we took them out were NGK TR55's. What is the difference in the numbers on these and what difference would I be seeing, or experiencing. I went with the TR6IX's because several of you modded and tuned folks are running them. Thanks in advance for your help.

[KonigWolf]

Here is the info from NGK's website on the two plugs you listed.

TR6IX
PIES Information
Part Number: TR6IX
Product Description: NGK Iridium IX Spark Plug
Marketing Description: NGK Iridium IX Spark Plugs Utilize A 0.6 Mm Iridium Center Electrode & Taper
Cut Ground Electrode For Faster Starts, Better Acceleration & Improved Anti*Fouling. They Also Feature
Trivalent Shell Plating For Superior Anti*Corrosive & Anti*Seizing Properties.

PADB Attributes
Center Electrode Core Material: Copper Core
Center Electrode Tip Material: Iridium
Gap Size: 0.040 in
Ground Configuration: Standard
Ground Electrode Core Material: Nickel Core
Ground Electrode Quantity: 1
Ground Electrode Tip Design: Taper Cut
Hex Size: 5/8""
Insulator Height: ISO
Manufacturer Heat Range: 6
Reach: 17.5mm
Resistance: 5K ohms
Seat Type: Tapered
Thread Diameter: 0.551 in

TR55
PIES Information
Part Number: TR55
Product Description: NGK V*Power Spark Plug
Marketing Description: The Exclusive 90 Deg Designed Nickel Center Electrode of the NGK V*Power
Spark Plug Produces the Spark at the Electrode's Edges. This Hot, Clean Spark Makes Better Contact with
the Air/Fuel Mixture Resulting in Combustion that is More Complete & Efficient

PADB Attributes
Center Electrode Core Material: Copper Core
Center Electrode Tip Material: Nickel w/ V*groove
Gap Size: 0.060 in
Ground Configuration: Standard
Ground Electrode Core Material: Nickel Core
Ground Electrode Quantity: 1
Ground Electrode Tip Design: Standard
Hex Size: 5/8""
Insulator Height: ISO
Manufacturer Heat Range: 5
Reach: 17.5mm
Resistance: 5K ohms
Seat Type: Tapered
Thread Diameter: 0.551 in

[SSMY1LE]

Originally Posted by 1JEWLDSSRS

Alright folks, just need a little info please, I changes my spark plugs in my 2011 SS after 70k miles on them, I drive the car hard. I went with the NGK TR6IX because I thought I had the NGK TR6's in there to begin with after the car was tuned 5 years ago, my tuner couldn't remember what he installed. I have a CAI, ported TB. longtubes and an off road mid and xpipe. The plugs that were in there when we took them out were NGK TR55's. What is the difference in the numbers on these and what difference would I be seeing, or experiencing. I went with the TR6IX's because several of you modded and tuned folks are running them. Thanks in advance for your help.

AC Delco
Iridium Spark Plug
Part Number: 41-110


Wasting money on anything else.

[1JEWLDSSRS]

Originally Posted by KonigWolf

Here is the info from NGK's website on the two plugs you listed.

Hello, thanks for the info, really different plugs, and gaps. I did notice a difference in my acceleration now, but also a decrease in my MPG's by a bit, about 1.5 to 2.0 MPG's..Also I have deiven the car for 2 days since the changeandjust noticed I have a CEL now. Gonna have to go checked out. Haven't had one for many years.. Car seems to run really good though..I'm wondering if the heat range change from a 5 to a 6 is what is causing it and the tune on my car doesn't like it. Just a thought..Might have to go back down to a 5.

[1JEWLDSSRS]

Originally Posted by SSMY1LE

AC Delco
Iridium Spark Plug
Part Number: 41-110


Wasting money on anything else.

Thanks, I will have to remember that for next time.

[InFiD3ViL]

Originally Posted by SSMY1LE

AC Delco
Iridium Spark Plug
Part Number: 41-110


Wasting money on anything else.

After much research, that is what I wound up going with.

[KonigWolf]

Originally Posted by 1JEWLDSSRS

Hello, thanks for the info, really different plugs, and gaps. I did notice a difference in my acceleration now, but also a decrease in my MPG's by a bit, about 1.5 to 2.0 MPG's..Also I have deiven the car for 2 days since the changeandjust noticed I have a CEL now. Gonna have to go checked out. Haven't had one for many years.. Car seems to run really good though..I'm wondering if the heat range change from a 5 to a 6 is what is causing it and the tune on my car doesn't like it. Just a thought..Might have to go back down to a 5.

I would find out what the CEL code is first, see if it is related to your ignition system.
As far as running a colder plug, that's what the NOS guys do all the time without any issues. If you're concerned with your MPG, then you might want to put up another set of the TR-55s. Should be about 2.50 for the NGK coppers.

[1JEWLDSSRS]

Originally Posted by KonigWolf

I would find out what the CEL code is first, see if it is related to your ignition system.
As far as running a colder plug, that's what the NOS guys do all the time without any issues. If you're concerned with your MPG, then you might want to put up another set of the TR-55s. Should be about 2.50 for the NGK coppers.

Yea thanks KonigWolf. going to pull the code tomorrow after work and see what it says. It's funny how I haven't had a code for over 5 years, change the plugs and get 1?? Hmmmm, also I noticed that my idle temps for the coolant are elevated a bit, air temps are same as have been and it usually never goes above 198 and has been showing 201.Today. Also my AFR is set at 12.1 in my tune.Thanks for your assistance, hope to get it sorted out quickly.

[christianchevell]

That AFR is rich of course compared to Stoich and that should be even considered sort of rich for WOT pulls...the gap is right with the tr6ix and BTW you don't gap Iridium plugs you can hurt them they are brittle, the 55s would have had too much gap compared to the stock plugs..... sure they work the 55s just with headers and such you want a 6 heat range and a 7 for FI..... and you have most likely a need to check the connections of the plugs wires and condition of the plugs as far as the CEL goes... Good Luck

[1JEWLDSSRS]

Well here is the news guys, went to the dealership and spoke with my mech that works on my Camaro when I need things done I'm uncomfortable with doing or just don't have the tools to do it, had him pull the code and it was a P0174,,lean condition bank 2. He then cleared the code and put the car on his diagnostic computer to check the fuel trims and they were right where they should be according to him and the data for my engine, so he didn't have to reset them.
Got home and called my tuner and talked to him about it and he was surprised that it even posted a code for a plug change, let alone the 1 I did get, he said that 1 should have never came up. He also said that when he tuned my car that he installed the TR55's and that changing to the TR6IX's would be fine, but if he had put the TR6's in there and I went to a TR55 he would have had to retune the car.
But anyway so far all is good and she runs great, I am not at all concerned about the MPG change, just thought it was weird that it would have changed any at all..Thanks for all the posts guys.

[SSMY1LE]

AC Delco will work better than NGK

[Quicksilverman]

AC Delco spark plugs would be the best choice for our cars.

[Gunmetal Speedster]

Originally Posted by SSMY1LE

AC Delco will work better than NGK

I took my AC Delco plugs in with the rest of my cam gear to be installed and the shop I took it to said they would be installing the NGK's instead not sure why. Or why they wouldn't use the part I provided.

[SSMY1LE]

I guess you'll need to ask them the reason, not saying they are wrong, just that most people find the AC Delco are a better plug.
Thats whats great about these threads, lots of input from a wide variety of experiences for us to consider.
Good luck with the install !