Posting for a buddy we are running a tr6 plug now with a 150 shot looking on upping shot to a 250 300 and trying to get a idea of how cold of a plug we should go....thanks

 

I would do a non projected tip plug probably a 8 and go from there. A tr6 is a projected tip plug and is def not something I would trust at higher levels.

 

Ngk b8efs

 

This was gana be are first option....

 

What is the static compression ratio?

If it's stock compression you might be able to get away with a B8EFS, but if it's been raised any over stock I'd go with a B9EFS. If you're running pump fuel on stock compression I'd also want to see you use a B9EFS, if you're going to run strictly race gas on stock compression with that amount of nitrous you could again probably get away with a B8EFS.

On a 150 shot I'd run a BR7EFS.

 

i would agree with martin.

 

We ran tr6 plugs on a 150 shot at about 11.1 compression....we ended up going with br7efs
Now that we are only going with 200 shot....any suggestions on gap....thanks..

 

If you're going to use a 200 shot use a B8EFS.

250 or over I'd highly consider a B9EFS although you could probably get by on the B8EFS on a 250.

 

Agree with this post. As long as you can keep a 9 clean, run it.