cooler plugs v hotter plugs
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Senior Member
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From: DETROIT, (formerly Eaton County, Michigan)
cooler plugs v hotter plugs
now I've read over and over that when you up the boost you should go with a cooler plug to help prevent detonation, dieseling, and to allow the cylinder to run cooler.
My question is, how much difference does a cooler plug really make? I'm running br-7's and pushing about 14-15#'s. Lately the truck has been idling rough and ocassionally missing at tip in of the throttle. Therefore, I'm considering going back to tr-6's. I know my tuner recommened br-7's and warned me that idle may be a little rougher.
how much difference does a cooler plug make? Seriously, how much lower does the cylinder temp go? Isn't the heat caused by the ignition of a/f, regardless if it is a hotter or cooler plug?
I could understand if hte plug itself was cooler or allowed to transfer heat away from the combustion chamber to the head to help cool the cylinder, but the diffrence between the br-7 and tr-6 isn't that great. basically the same design.
so someone educate me here.
My question is, how much difference does a cooler plug really make? I'm running br-7's and pushing about 14-15#'s. Lately the truck has been idling rough and ocassionally missing at tip in of the throttle. Therefore, I'm considering going back to tr-6's. I know my tuner recommened br-7's and warned me that idle may be a little rougher.
how much difference does a cooler plug make? Seriously, how much lower does the cylinder temp go? Isn't the heat caused by the ignition of a/f, regardless if it is a hotter or cooler plug?
I could understand if hte plug itself was cooler or allowed to transfer heat away from the combustion chamber to the head to help cool the cylinder, but the diffrence between the br-7 and tr-6 isn't that great. basically the same design.
so someone educate me here.
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Joined: Aug 1999
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From: Palm Coast, FL
Originally Posted by l-menace
I could understand if hte plug itself was cooler or allowed to transfer heat away from the combustion chamber to the head to help cool the cylinder, but the diffrence between the br-7 and tr-6 isn't that great. basically the same design.
so someone educate me here.
so someone educate me here.
A hotter plug will perform better, but also increases the chance of burning up if it overheats. Lots of people run TR6s in too hot a situation, because their truck "runs" better. But it's a gamble. It may last for 10 years or 10 minutes.
It's kind of like running a little on the lean side.... sure it makes more power, but for how long?
Also, TR6s and BR7s are NOTHING alike. You couldn't find two completely different plugs. The TR6 is a regular style, V-groove electrode plug. The BR7 is a non-projector, performance plug. Yes, there is a trade off in driveability vs reliability, but if you want to use these plugs, you gotta pick one of the two scenarios.
The other option is the Densos. With the Iridium plugs, you CAN have the best of both worlds. You can run the proper heat range plug, and still have a nice idle and better rpm smoothness. Yes, they are $90 a set, but like everything in life, you get what you pay for. If you want a $20 plug set, choose between not burning them up, or better street manners. If you want both, it costs more
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Senior Member
Joined: Jan 2003
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From: DETROIT, (formerly Eaton County, Michigan)
Originally Posted by LightningTuner
That is the reason why. The "colder" heat range means that the heat will be dissapated to the head faster, thus a cooler plug.
A hotter plug will perform better, but also increases the chance of burning up if it overheats. Lots of people run TR6s in too hot a situation, because their truck "runs" better. But it's a gamble. It may last for 10 years or 10 minutes.
It's kind of like running a little on the lean side.... sure it makes more power, but for how long?
Also, TR6s and BR7s are NOTHING alike. You couldn't find two completely different plugs. The TR6 is a regular style, V-groove electrode plug. The BR7 is a non-projector, performance plug. Yes, there is a trade off in driveability vs reliability, but if you want to use these plugs, you gotta pick one of the two scenarios.
The other option is the Densos. With the Iridium plugs, you CAN have the best of both worlds. You can run the proper heat range plug, and still have a nice idle and better rpm smoothness. Yes, they are $90 a set, but like everything in life, you get what you pay for. If you want a $20 plug set, choose between not burning them up, or better street manners. If you want both, it costs more.
A hotter plug will perform better, but also increases the chance of burning up if it overheats. Lots of people run TR6s in too hot a situation, because their truck "runs" better. But it's a gamble. It may last for 10 years or 10 minutes.
It's kind of like running a little on the lean side.... sure it makes more power, but for how long?
Also, TR6s and BR7s are NOTHING alike. You couldn't find two completely different plugs. The TR6 is a regular style, V-groove electrode plug. The BR7 is a non-projector, performance plug. Yes, there is a trade off in driveability vs reliability, but if you want to use these plugs, you gotta pick one of the two scenarios.
The other option is the Densos. With the Iridium plugs, you CAN have the best of both worlds. You can run the proper heat range plug, and still have a nice idle and better rpm smoothness. Yes, they are $90 a set, but like everything in life, you get what you pay for. If you want a $20 plug set, choose between not burning them up, or better street manners. If you want both, it costs more
.AHHH!!!! Thank you Sal. you da Man.
(have any more pics of the cobra>?)