Spark Plugs?
Thread Starter
Former Vendor
Joined: Mar 2003
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From: Tampa FL
St. Jude Donor '07-'08-'09-'10-'11-'12'-'13-'14-'15
Spark Plugs?
I have used NGK in the past but got some Autolite double platinum for a good price. Any benefit to using the double plat? What is proper gap?
Cajun
Cajun
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From: Supporting the Corvette Community at Abel Chevrolet in Rio Vista, CA 707-374-6317 Ext.123
St. Jude Donor '08
Throw them in the garbage, go back to the AC Delco plugs and save headaches down the road. For stock or lightly modded NA applications, there is no benefit to aftermarket plugs. I have seen a ton of drivability related issues lately with NGK's and other aftermarket brands. Random misfires, ses lights and carbon tracking on the plugs are the most common. Stick to the factory plugs and don't believe everything you see on TV.
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From: Hudson WI
NCM Sinkhole Donor
Throw them in the garbage, go back to the AC Delco plugs and save headaches down the road. For stock or lightly modded NA applications, there is no benefit to aftermarket plugs. I have seen a ton of drivability related issues lately with NGK's and other aftermarket brands. Random misfires, ses lights and carbon tracking on the plugs are the most common. Stick to the factory plugs and don't believe everything you see on TV.
Drifting
Joined: Apr 2006
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From: Ambler Pa.
You beat me to it. Look at a NGK and an AC plug side by side ......... Also some time back I read an article about GM giving an award of merit for research and development in the area of spark plug design. The award went to NGK.
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From: Hudson WI
NCM Sinkhole Donor
That maket has gotten so small in the past 20 years, and you can't pay UAW workers what they get\want when you can buy a better product for less money from someone else.
Team Owner
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St. Jude Donor '15
"In honor of jpee"
so, does that mean ac and ngk plugs are made to the same specs, exact materials, design, etc.?
I recall there was a post somewhere about "plant capacity" and how many brands of other materials were produced at one plant, but with different specs. kinda like tires which can be (and are) produced at a "name" factory for many different brands put on the outside. but definitely not the same tires.
I recall there was a post somewhere about "plant capacity" and how many brands of other materials were produced at one plant, but with different specs. kinda like tires which can be (and are) produced at a "name" factory for many different brands put on the outside. but definitely not the same tires.
Race Director
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From: Supporting the Corvette Community at Abel Chevrolet in Rio Vista, CA 707-374-6317 Ext.123
St. Jude Donor '08
I am not confident the Iridium plugs for the LSx motors are sourced from NGK. I am confident that a TRx plug from NGK in a stock or lightly modded car will cause issues. We have literally had a dozen cars in the last few months that have proven that fact to me with different issues relating to drivability and misfires.
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Race Director
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From: Hudson WI
NCM Sinkhole Donor
so, does that mean ac and ngk plugs are made to the same specs, exact materials, design, etc.?
I recall there was a post somewhere about "plant capacity" and how many brands of other materials were produced at one plant, but with different specs. kinda like tires which can be (and are) produced at a "name" factory for many different brands put on the outside. but definitely not the same tires.
I recall there was a post somewhere about "plant capacity" and how many brands of other materials were produced at one plant, but with different specs. kinda like tires which can be (and are) produced at a "name" factory for many different brands put on the outside. but definitely not the same tires.
Safety Car
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From: Miami FL
2020 C6 of the Year Finalist - Unmodified
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16,'17,'18-'19-'20-'21-'22
I am not confident the Iridium plugs for the LSx motors are sourced from NGK. I am confident that a TRx plug from NGK in a stock or lightly modded car will cause issues. We have literally had a dozen cars in the last few months that have proven that fact to me with different issues relating to drivability and misfires.
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Safety Car
Joined: Jun 1999
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From: Austin, Singapore, Kuala Lumpur, Houston, Dallas, Hong Kong, Elgin, etc.. Texas
Although I noticed nothing wrong with the NGK, I switched back to the AC Delco plugs. My car seems to run great with the OEM AC Delco plugs. I don't understand the reason to switch to NGK plugs for stock or lightly modified engines.
Melting Slicks
Joined: Jun 2005
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From: Sicamous BC
Here is what happened by switching to TR6, due to the timing being removed from Knock Retard.
C6 06 6spd, only a spinmonster ported Fast 90 & TB & a Venom intake. So this would qualify as a lite mod, I never dyno'd this car stock so I'm not sure if the results vary.
The sensitivity of the knock sensors is such that you never know the timing is being removed unless you logged it.
I posted these results over in the HPT forum, I picked up this tip from a tuner on that forum.
Safety Car
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From: Austin, Singapore, Kuala Lumpur, Houston, Dallas, Hong Kong, Elgin, etc.. Texas
Although I don't disagree with your Dyno result, is it possible there were other reasons for the reduction of KR other than changing the brand of spark plugs?
For example, were the gaps the same? Could the old AC Delco plugs have excessive carbon resulting in a hot spot causing in pre-ignition?
Is it possible yield the same results would happen by replacing your old AC Delco with new AC Delco?
Again, I don't doubt the dyno results.
For example, were the gaps the same? Could the old AC Delco plugs have excessive carbon resulting in a hot spot causing in pre-ignition?
Is it possible yield the same results would happen by replacing your old AC Delco with new AC Delco?
Again, I don't doubt the dyno results.
Race Director
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From: Bay Area Ca.
Here is what happened by switching to TR6, due to the timing being removed from Knock Retard.
C6 06 6spd, only a spinmonster ported Fast 90 & TB & a Venom intake. So this would qualify as a lite mod, I never dyno'd this car stock so I'm not sure if the results vary.
The sensitivity of the knock sensors is such that you never know the timing is being removed unless you logged it.
I posted these results over in the HPT forum, I picked up this tip from a tuner on that forum.
Melting Slicks
Joined: Jun 2005
Posts: 2,396
Likes: 52
From: Sicamous BC
Although I don't disagree with your Dyno result, is it possible there were other reasons for the reduction of KR other than changing the brand of spark plugs?
For example, were the gaps the same? Could the old AC Delco plugs have excessive carbon resulting in a hot spot causing in pre-ignition?
Is it possible yield the same results would happen by replacing your old AC Delco with new AC Delco?
Again, I don't doubt the dyno results.
For example, were the gaps the same? Could the old AC Delco plugs have excessive carbon resulting in a hot spot causing in pre-ignition?
Is it possible yield the same results would happen by replacing your old AC Delco with new AC Delco?
Again, I don't doubt the dyno results.
I puchased this car with 1360 miles @ the time of the dyno it has 2600 miles. Based upon the dyno & my ownership, very unlikely there are carbon deposits. Or for that matter the plugs looking much different that when they were new.
Did I measure the gap, no, visual yes. My thought would be not to wrap your head aound the gap to much.
The improvement here was due to the heat range.
My point is unless you are on a dyno or extremely comfortable with your car you would not notice this change.
Drifting
Joined: May 2002
Posts: 1,530
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From: Houston TX
Spark plugs are such a small cost and easy change. Why do folks challenge the benefits of different spark plugs? Just pop em in and check em out. No harm - no foul (pun intended).
If you are willing to spend about $80 for plugs, try the Accel Silver Tips. I did, and boy what a difference! Before you flame $80 spark plugs, ask yourself what $80 mod can you make in about 30 minutes and get a real SOTP difference. The AC Delcos that came out were OEM and had 10500 miles, no carbon deposits.
I don't drag race my car, but someone who does ought to do this swap at the track between runs.
If you are willing to spend about $80 for plugs, try the Accel Silver Tips. I did, and boy what a difference! Before you flame $80 spark plugs, ask yourself what $80 mod can you make in about 30 minutes and get a real SOTP difference. The AC Delcos that came out were OEM and had 10500 miles, no carbon deposits.
I don't drag race my car, but someone who does ought to do this swap at the track between runs.
Melting Slicks
Joined: Jul 2007
Posts: 2,052
Likes: 14
Here is what happened by switching to TR6, due to the timing being removed from Knock Retard.
C6 06 6spd, only a spinmonster ported Fast 90 & TB & a Venom intake. So this would qualify as a lite mod, I never dyno'd this car stock so I'm not sure if the results vary.
The sensitivity of the knock sensors is such that you never know the timing is being removed unless you logged it.
I posted these results over in the HPT forum, I picked up this tip from a tuner on that forum.