Posi vs standard, handling?

[pitts64]

I was wondering if a car would handle better with the standard rear end vs a posi, I noticed they use to use them at NASCAR.. I'm thinking less friction especially during turns, no slip, lighter... I know a common misconseption is a standard differental only turns one wheel but that's not true, they tend to overload the one wheel that brakes loose during hard launches...

Any thoughts?

[Ron Sutton]

Somewhere you got some bad info. Every car & truck in the upper NASCAR series run some version of a Locker. For ovals, most run a CTR version, and only unlock the left rear wheel, when turning left. For road courses, they run a conventional unit that unlocks when turning left & right.

Detroit Lockers (and clones) do not increase friction in the drivetrain. They are either locked like a spool ... or unlocked like an open diff.

[David Pozzi]

Who in NASCAR uses an open rear end?

[pitts64]

I ment back in the old days.. I corrected the wording in my first post, sorry.

[Ron Sutton]

The short answer is a car will not perform better with an open diff.

[pitts64]

Thank you Ron...