I have TR55's right now, and they are fairly new, can i just pull them and regap them colder?

 

You need to take all necessary precautions when using nitrous if you want you’re motor to live. With that being said the TR55's might be okay, but why risk it, especially if you are thinking about pulling the TR55s out to regap them. I would just use the TR-6s.

 

I wasnt sure if the TR55's and the TR6's were actually different plugs, or if the factory gapping was just different on them. Thanks tho.

Do you have TR6's on hand as a shop? And where exactly in the philly area are you located, I live right outside, in Springfield, Delaware County, and saw you have a good price on refills and you deal mainly with nitrous stuff.

You're reply may have just got you a new customer!

Im going to need 6 TR6's, a fuel pressure safety switch, a WOT switch, some toggles, a momentary switch, some relays, and a bottle filled this upcoming week.

Thanks.

Also, just noticed you have a ligntning shop car pictured in your website. Was that by chance at the K&G car show on west chester pike last friday?

 

TR6's may be too cold of a plug for your motor. If the TR55's are working for you now, I say leave them unless you are spraying some serious horsepower.

 

Im starting off with a 75 shot, and its a wet kit. I may spray a 100 shot sometime, but not right away, as this is my first time with nitrous and i want to see how it goes.

 

A TR6 is 2 steps colder than stock, you should be able to run a 75 shot on a stock heat range plug as long as the electrode and gapping are correct. I say stick with the TR55's.

 

Regapping the plug doesn't change it's heat range. A smaller gap is used with nitrous to prevent the spark from being blown out. With a 75 shot there is probably no issue with the stock gap of .050"

 

Who said regapping changes heat range?

 

Yup, that was our Lighting there last Friday. Sending you a PM now...

 

I run autolite 103's on my car with a 100 shot,they are 2 steps colder,started out with a 50 shot. had them in there for 6 months, ran 3 bottles threw them and checked them out recently they were perfect. my car even runs good without the n20 they are gapped at .35

 

Thanks for the replys. Ill hit it two or three times then pull the TR55's to see how they look. If they look crappy, ill pick up some TR6's.

Thanks again.

 

Hedzilla wrote: "I have TR55's right now, and they are fairly new, can i just pull them and regap them colder?"

Hence my answer regapping the plugs doesn't change the heat range.

 

Yes, this i didnt know, i always thought that a colder heat range plug meant that instead of the .050 gap it was like a .035 gap.

What exactly does 'colder' mean?

 

Colder and hotter is basically the heat sink properites of the design. A hotter plug is just that, it is physically hotter when running (less heat allowed to conduct to the head). Heat is needed to burn off carbon deposits, so you need enough heat to keep the plug clean yet not too much heat to cause pre-ignition.