High compression/horsepower guys (what plugs)
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From: Hanover, Michigan
High compression/horsepower guys (what plugs) I have always thought that one was to use the stock heat range plug on an ls1 if no nitrous or supercharger is being used.
As of late I have been coming across some different information. One of these is a plug reference chart that says if you are running 11.1 compression one should use a colder plug. Also something about every 50 horsepower increase should designate a 1 step colder plug.
So they are saying that I should use a plug 3 steps closer than stock? wtf?
I have got some tr55's ready to go in after the swap...but now I am worried.
thanks for the input
Troy
As of late I have been coming across some different information. One of these is a plug reference chart that says if you are running 11.1 compression one should use a colder plug. Also something about every 50 horsepower increase should designate a 1 step colder plug.
So they are saying that I should use a plug 3 steps closer than stock? wtf?
I have got some tr55's ready to go in after the swap...but now I am worried.
thanks for the input
Troy
Use TR6's if you need a colder plug. They are the most common colder plug used for our motors. They work fine for a lot of power, almost everyone with big nitrous shots use them.
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I have about 11.3:1 compression.
I used TR55s for 6 months. Pulled them out, and they were (visually) a little too hot.
I put in TR6 plugs, and it runs perfectly.
The plug manufacturers will tell you 1 step colder for higher compression or for every 100hp over stock (no matter how you get the power).
If you're unsure, the manufacturers always tell you to err on the side of "colder."
Slightly too cold is better than slightly too hot.
I used TR55s for 6 months. Pulled them out, and they were (visually) a little too hot.
I put in TR6 plugs, and it runs perfectly.
The plug manufacturers will tell you 1 step colder for higher compression or for every 100hp over stock (no matter how you get the power).
If you're unsure, the manufacturers always tell you to err on the side of "colder."
Slightly too cold is better than slightly too hot.
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From: Hanover, Michigan
alright...I should probably get some tr6's then.
My dcr is 8.6-8.7 as well...which is not good for the hotter plug I am learning as well.
What should the tr6 plugs be gapped to on an n/a car? I did some searching and found most said around .045.
thanks again
My dcr is 8.6-8.7 as well...which is not good for the hotter plug I am learning as well.
What should the tr6 plugs be gapped to on an n/a car? I did some searching and found most said around .045.
thanks again
Last edited by UltraZLS1; May 1, 2006 at 07:04 PM.
