nwalton29

iTrader: (7)

At what CID/ compression/ HP should I step from TR-6 plug to a BR7efs plug? I'm at 451 CID, 12:1 comp, with right at 650 crank hp. N/A.

Grr

iTrader: (2)

There is no downside to running a colder plug, I run a non projected NGK 8 in my stuff NA on E85, my old motor was 12.9 compression 346cid. Switching from a tr6 to the 8 allowed me to add 2-3* of timing everywhere and pick up power

nwalton29

iTrader: (7)

Ok, thanks. I'm going to start it up tomorrow. I'm going to take the tr6's out and put in the br7's.

chrisfrost

iTrader: (8)

There is no downside to a colder plug ,,,,,, but an 8 is probably as cold as You could go without it not burning the fuel/air completely

Dr.Goat

I would go with the br7 great plug does the job for bigger shots!