spark plugs for nitrous

[Chopstix]

I have had cars come to me for help...one for example AFR 195 headed 383...car seemed to run fine, no banging popping etc...but couldn't get up on the trans brake and felt lazy....swapped out his heat range 6 plugs for a set of 9s and the car picked up half a second at the track

http://members.uia.net/pkelley2/sparkplugreading.html

read that link and then check your plugs to see what the motor wants

[TravisMcGill2000]

Now you got me wondering. I look into swaping some plugs around and see how plugs looks. Ive run 7.0s in the 1/8 with these so far. I gota do some more reading on how to read plugs. I still got alot to learn. Thanks for the link.

[GuillaumeC]

Wow, I was using BR7EFS with the TT motor @ 18 psi and stock heads and was going to use the same heat range plugs with the new motor and AI ported TF heads...

Guess I'll have to return the 7's and order a set of 9's to start with.

[Chopstix]

I have a lot more experience tuning nitrous motors...I always start with a plug that I feel is 1-2 steps colder than what I will end up with on big power adder applications