I was in the 13's before, maybe in the 10's now?
Don't really want to be below 10 cuz NHRA makes you put in roll cage under 10.
My (now departed) Z28 would do high 11's with good fat rubber. With street radials 12's. But having only a 10 bolt rear I really was afraid of running those (borrowed) ET drag slicks and blowing the thing apart. Never did spring for a 12 bolt rear.
These sound like Dynamic Range ratings. There are indeed recordings with DRs under 10 that should have a roll cage...or simply put in a cage. LOL