Weston

Yup! Too much rear sway bar with an open diff and you'll get wheel spin in the tighter corners, but that can be adjusted. I see open diff cars winning races all the time. LSD's are nice, but I've found that it's not that much of an issue if you've got a decent amount of rubber on the ground relative to your engine power.

early_grayce

So a 964 with the original LSD should command a decent premium over a non-LSD?

Or...is it semi-irrelevant because it will likely be due for a rebuild?

Thanks for the advice guys.

Professor Helmüt Tester

A somewhat contrary view -

Running an open diff can make you a better drover. Why ? Because you'll actually have to pay attention to throttle application while cornering, and learn to not spin up the inside tire. Paying attention to suspension-loading, and gettting the full range of vehicle feedback, is important. If you're not racing, for money...trophies...post-race nookie...whatever...then LSD is definitely NOT a "must". Besides, if it's not there, it can't break (says the guy who broke a "Detroit locker" in 2007...yes...you can actually break one).

Learn to drive without it. Like any crutch, you'll see an advantage if you then transition to one, with the skills you've learned "without".

Veloce Raptor

Good points, but the advantage is also a higher level of stability under braking, which is IMO a safety issue whether race or DE.







Professional Racing and Driving Coach

Weston

Excellent point. I've definitely become a much faster driver after going from a ~300 HP car to a 150 HP 944. When you have a lot of car to work with, it's a lot easier to mask mistakes and develop bad habits.



Hmm, maybe it's time to install an LSD then...

hunterpeaks

I had the same question about 2 months ago. I bought a OS Giken LSD for my 1988-911 3.2.
First track day last thursday at VIR. 2 seconds faster than my best time EVER! NO other differences.

Traqmate confirmed it. It felt like my rear wheels turned with the car. Totally incredible. Felt so planted.

Now I am understeering more though....

Hunter

Giacomo

I would tend to agree. The factory LSD will just not be enough for a full out race car. For an occasional DE vehicle it would be nice to have over nothing.

FredC

Sean and I thought you were running a quaiffe.

OBehave

With 80% LSD's out there being used,wouldn't it be possible to just run a spool and be done with the extra parts?

Gary R.

Great, now BOTH cheaters are gangin up on me!

todinlaw

I think its a big step up from an Open dif. LSD helps when coming out of the corners putting down more even power allowing throttle steer, and keeps both tires engaged, limiting wheel spin, On heavy braking the LSD keeps both tires engaged with the pavement. more even braking, and more even trailbraking, so if you want more out of you and the car, Its a necessary upgrade from the open Dif. Just my opinion, I could be wrong.

TR6

For a long time I thought I was running with LSD since my car has it. Then one day I actually tested it when I had the car jacked up and found the clutch pack was worn to the point that I'm pretty much running an open dif anyway!

race911

As I read through, I kept waiting for this comment and thought I might have been able to add something. Foiled again!

CornerCarver

I've been waiting for this response. Now I can sell the wife on this. Thanks!

Veloce Raptor

VICTORY!







Professional Racing and Driving Coach