Wondering what is the max effort with a 67mm I kno the buicks can do pretty good with them but what about the ls family of engines I am wondering because the class I am running is limited to a 67mm turbo u can run a 72mm but you have to be 300lbs heavier

 

If your wallet can afford a true max effort, I could see 900 plus up out of it. Car, weight, etc will determine what that translates to.

 

I'd be willing to bet in one of the nmca classes or the like that have limitations of this size probably has seen cars in the 8.0 to 7.9 range but they're high dollar deals to get there for sure

 

I'm building my car to be legal for the Import vs domestic true street class the front runners are in the low 8.5 high 8.4 range I just want to be competitive with like a 8.9 to 9.0 sounds like a long shot with a 67mm turbo at 3325lbs starting to think a bigger cube ls3 with a 26 jet fogger setup is probably a better combo