i know i dont really need the tr6's but i went ahead with them any way. What is the gapping for them? i have been looking online but every site has a different answer. very frustrating.

ngk site says .040 for the vpower tr6. is that the best gaping? all i have done is LTS, and off road Y for now

 

Why did you pick the TR6 for a mild NA application? Just wondering....

 

First thing, take them back and swap for the TR55's. Then gap them around .050-.055"

 

The guy who wrote my tune and does all the work at straight line speed where I live strongly suggested the TR6 over TR55. And online even for the 55's it says .040 so why .050 - .055

 

55's on your application will be great (no extra compression, no power adder, etc)! The wider gap is because you can! The ignition systems on these cars are very strong, and have no problem firing over that gap. You want the largest gap you can run without blowing out the spark (short answer).

 

IMO, the TR6 is less than ideal for a stock compression, NA motor. That is the first tuner I've ever heard that would recommend a colder plug for a stock engine with no N2O/blower/turbo. Perhaps he has your A/F on the ragged edge of lean and the timing on a very aggressive curve.


Where does it say that? The TR55 comes out of the box gapped at .059". Recommended gap for the LS1 was .060 from the factory, and most people run their TR55s gapped anywhere between .050 and .060 for best results. IMO, .040 is too tight of a gap for the TR55 in an LS1.

 

I agree 100% with all of this.

 

ngk.com has a chart showing to gap it at .040 . http://www.ngk.com/more_info.asp?AAIA=1382486&pid=3686

i dont know how he is tuning the car. but why would it hurt my performance? why would a colder plug be less effective?

my car is already on jack stands while im installing the headers. Am i running that big of a risk to go out and get the TR55's?

 

LOL, I just pictured you in a politcal ad "I'm RPM WS6 and I approve of this message."

A cooler plug, when not needed, will not last as long and can foul prematurely. Hate to ask, but if you're so set against what we have to say, and what is fairly common knowledge amongst the members of this and other forums, then why'd you start the thread?

 

im not against it...im just wondering since i already bought the TR6's and dont know where the receipt is to return them if i should go get some TR55's or is the TR6 fine to use even though its not force indunced or anything. i was also curious on gapping since ive seen anywhere between .038 (not on this thread) and .055. if the TR6 will hurt my car by all means i will go get the TR55's its no big deal if i need TR55s i will get some. and if i do who carries them? car quest by me does not

 

TR55's are great for mild cars. I ran them gapped .055 with my old ported heads/cam/intake for 30k and they looked good when they came out. Now that my CR is bumped up half a point to 11.2-11.3ish I run the cooler TR6.

 

OK i will get a set of TR55's and gap them between .05 and .055 then. Thanks!

 

That link is for a TR5, which also has a different stock number. You want a TR55, stock number is 3951 I beleive. The TR55 will come from NGK gapped at .059". You can gap anywhere from .050 to .060, but most seem to like the middle ground of .055 (that's what I use as well).

Also, that link is just showing you what the gap is for that particular plug, not saying it's the best gap for your application.

I'm a bit concerned about why he would recommend a colder plug for a stock, non-power adder engine. My only guess is some very ragged edge tuning, which I am not a fan of for street cars. You need some margin of error for a car that'll be driven under varying weather and traffic conditions on pump fuel.

I again agree with Matt's answer on that:



People with N2O still use this plug even when their finger isn't on the button, but it's just not the ideal plug for an application where a power adder (or high compression) isn't going to be used full or part time. If you're stock and always NA, you will get better results from the stock heat range plug.