Anyone Running A Quaife LSD?

[JETPILOT]

Let me hear your thoughts.

[dmoffitt]

I ran one in my 951, good stuff. IF you can afford to wait, talk to Torvec - the stuff I've heard (and now seen in person, toured the place since they happen to be local to me) is AMAZING...

[Z1NONLY]

I still think the Quaife LSD is the best mod I have ever done to my Z.

Here is some "cut and paste" from other threads I have posted in regarding the Quaife....

Originally Posted by Z1NONLY

I highly recommend the Quaife LSD. It's quiet, smooth, and ohhh so effective. (also ohh sooo expensive)

I have done many auto-cross events with my quaife and have noticed that having the outside tire get most of the power in a turn helps the car rotate through turns. (kind of like mild 4-wheel steering?)

I have never driven a clutch-type LSD but I can't imagine another LSD being any smoother.

Originally Posted by Z1NONLY

I went from an open diff to the Quaife on my 05 base. I autocross at least two days a month and can personally vouch for the Quaife's effectiveness.

I can't remember the exact numbers but, IIRC, the Quaife shaved well over a second off of our 40 sec "test & tune" course. The helical design is really a big plus for turns. Having the outside rear tire get most of the power in a turn is almost like four wheel steering. It actually helps the car turn, when you learn to use the throttle with it.

Worth every penny!

Originally Posted by Z1NONLY

Here is part of a pm I sent another Z owner regarding the Quaife LSD

"...Well the wife and I just got back from the Tail of the Dragon, (ZdayZ) and I had a chance to A/B the Quaife vs. the stock LSD and I can say the Quaife is noticeably better. Both the guy I swapped cars with and myself noticed the difference immidiately. The quaife actualy helps the car through the turns. The stock LSD allways seemed a hair "late" hooking up and seemed to be making an "approximate" attempt at traction.The Quaife was always ready and seemed to be waiting on the driver to apply throttle in every turn.
I'm guessing the time it takes for the different wheel speeds to lock the stock LSD gives it that "late" feeling and, when it locked up in a turn, it seemed to do so after the inside tire was already spinning a little too fast, thus giving a little wheelspin from both tires when it kicked in.

This, of course, is all relative to the Quaife. I still remember how frustrating it was to try and power out of corners with my open diff and the stock LSD does a much better job than the open diff, just not as good as the Quaife.

BTW: ...the guy I swapped with [road racer], said he is getting the Quaife ASAP......"

[JETPILOT]

Is it true there is no 1.5 way or 2 way? Those terms do not apply to the Quaife?

[Z1NONLY]

Quaife doesn't release too many details on their LSD's, and I have never heard or used the 1.5 or 2 way terms with respect to any Quaife LSD.

Quaife basically says "We made the application we are selling you for your car. Trust us."

Had it not been recommended by a few different people I trusted, I probably wouldn't have rolled the dice with a product that comes with so few details.

[mistico]

I have one, works great.
I've written about it before so you'll find info on the forum.

[Resolute]

Originally Posted by JETPILOT

Is it true there is no 1.5 way or 2 way? Those terms do not apply to the Quaife?

That's right. It's not a clutch-type differential with different ramp profiles to affect engagement characteristics, it uses helical (worm) gears to transmit torque between the case and side gears.

Will

[betamotorsports]

Quaifes are different compared to other LSDs. They require a softer rear suspension setup because if you lift an inside rear wheel the diff goes open. Some people are reluctant to make the suspension adjustments and have a poor opinion of the Quaife. I was one of those people when I raced a 240Z. I siwtched from a CLSD to the Quaife and just hated the thing.

I ended up talking with Craig Taylor at Taylor Race Engineering for long time and decided to do some wholesale changes to the suspension on my 240Z. I moved roll stiffness forward, changed the spring bias from rear to front, and reduced rear camber.

The car was a little slower on corner entry but I could pick up the throttle a couple heartbeats before the corner apex and the throttle was mashed to the floor just past the apex. My lap times everywhere improved by 5% and the car just launched out of the corners, which got scary sometimes. Other cars would sometimes beat me to the inside of the corner at turn in but I would just rocket into their rear bumper coming out of the corner.

[JETPILOT]

Good info..... Thanks.

[Eagle1]

Check with Mike B (SinCity350Z)

He was running one for awhile, but with major TT power, and I think it broke apart on him.

If you are running NA, and use the car a lot on the street, the Quaife is something to seriously consider. The clutch type LSD units work very well, but are "bad boys" on the street which requires you to adjust your driving technique to avoid scaring old ladies in supermarket parking lots and passengers in your car.

[betamotorsports]

FYI... Quaife's come with a lifetime warranty and they cover racing. Blow it up, they send you a new one. 'Course, if you blow something up in your race car, why would you re-install a new one?

[betamotorsports]

FYI2... the easiest way to blow up a Quaife is to lift an inside rear wheel under power and then bring it back down hard (curb hopping) while putting a lot of torque through the unit. The units themselves are very strong and we ran them behind GTS-R Vipers running in ALMS during the early part of this century.