I'll have a cammed 4.8 with 10:1 CR. Should I run NGK TR55 or TR6?

 

tr55's

 

55....

 

Okay, that's what I figured. Geoff at EPS is who spec'd the cam and he said drivability will probably be better with the 6's but I know several people who said to run the 55's. And since I already have tr55s in it, anybody wanna buy some tr6s?

 

Tighten up the gap a few thow if need be.

 

Usually driveability goes down with colder plugs. I'd use 55's, 10:1 is nearly stock.