LSD in a fwd?!

[Arizona_928]

Does anyone have one that will share their experience with? I'm used to the 928 with LSD, but no experience with FWD besides a bunch of understeer.
Looking into one for the mk6 since I'll be out of power train warranty in couple months. Saw that Peloquin, and wavetech offer them.
Anyone have experience with either brand?

[Tervuren]

Unless you're on ice/snow or warm weather tires in freezing cold, I think an open diff would be better?

That, or you're really putting down a frick ton of HP, which most FWD's aren't.

A LSD will increase your understeer in most situations with a FWD. I'd prefer without unless it were a straight line race, or I was dealing with surfaces with extremely uneven grip.

[mph911]

Im not familiar with which brand to use, however an LSD in FWD car is probably the best performance improvement you could do. An LSD REDUCES understeer and helps get power down. Its common to reduce lap times by up to 3 seconds in a well set up FWD.

[onewhippedpuppy]

Im not familiar with which brand to use, however an LSD in FWD car is probably the best performance improvement you could do. An LSD REDUCES understeer and helps get power down. Its common to reduce lap times by up to 3 seconds in a well set up FWD.

This. Many performance FWD cars come stock with either an LSD or virtual LSD that uses the brakes to mimic the mechanical diff.

[livi]

I wouldn´t recommend LSD while driving any vehicle.

[911SauCy]

Had an LSD in a race built tranny in my 'ole daily driven '98 Regal GS

Worked like a charm with Hoosiers at the track or Blizzaks in the snow.

[andyt11]

It will be a great improvement. Its only limited slip, its not all locked up. No reason it should induce under steer.

[flipper35]

It will keep the inside front tire from converting to smoke, allowing better traction up front.

[Geary]

The term "LSD" has been bastardized somewhat in recent years. Both of those diffs mentioned are actually TBDs, which perform well in FWD (whereas a true LSD would induce understeer in FWD). Of the two, I would recommend the Peloquin.

[Lapkritis]

Gary at Peloquin does great work and stands behind his product. I've had one of his differentials in my VR6 Turbo for a decade. I wouldn't consider any other brand for VW differentials.

[Lapkritis]

PS - I had one of the ARP ring gear bolts shear on my way up to Fountain Hills on Shea while tuning water-meth for the first time. Gary serviced the differential for the cost of shipping and had it back to me so I was only without for a couple weeks.

[saxen]

Originally Posted by mph911

Im not familiar with which brand to use, however an LSD in FWD car is probably the best performance improvement you could do. An LSD REDUCES understeer and helps get power down. Its common to reduce lap times by up to 3 seconds in a well set up FWD.

this is correct-
it may not the the "best" improvement- but its a damn good one.

[speeder]

Originally Posted by Tervuren

Unless you're on ice/snow or warm weather tires in freezing cold, I think an open diff would be better?

That, or you're really putting down a frick ton of HP, which most FWD's aren't.

A LSD will increase your understeer in most situations with a FWD. I'd prefer without unless it were a straight line race, or I was dealing with surfaces with extremely uneven grip.

Others have already answered this but I think it bears mention that LSD refers to limited slip differential, not zero slip differential. All differentials allow differences, or differentials between the amount of torque and the turning speed of the 2 wheels on opposite ends of the axle. An open diff is basically a 100% slip differential, ie. It allows 100% slippage between the two wheels. One side gets 100% of the torque, the other side gets zero.

A stock Porsche 911 LSD used to be 40%, (if not mistaken), which offered no disadvantage in road driving under any condition, IMO. A 0% LSD diff would be a locked axle. The Evo I recently owned briefly had a Quaife LSD in the front axle that greatly reduced the *one wheel spinning* problem while exiting corners under power, particularly when the power was increased from stock.

An intelligent limiting diff in a FWD car would be one of the best improvements you could make, I would think.

[Geary]

A 0% LSD diff would be a locked axle.

To remain consistent with Porsche terminology, fully locked is 100%. 0% is an open diff.

[SeanPizzle]

Quaife makes LSD's for many applications in FWD and have a good reputation. Now my stage rally Dodge Neon has welded front diff. Good on gravel, not so much on tarmac. I lost my powersteering on-stage once. Made for very tough steering back on the tarmac transit.

[flipper35]

I think the SRT-4 came with a Quaife from the factory after the first year.

I think most racing terms 100% is locked.

[speeder]

Okay, 100%=locked. 0% slip.

[mattdavis11]

My FWD has semi floating differentials, but you can lock the transfer case to equally distribute the power to the front and rear.

However, when you remove the front drive shaft, locking the transfer case is the only way it can get down the road decently. Removing the front drive shaft significantly changes the way the vehicle handles. Never tried to drive it with the rear drive shaft out. Hope this helps.

[targa911S]

LSD changed the way I look at life..

[porsche4life]

Originally Posted by onewhippedpuppy

This. Many performance FWD cars come stock with either an LSD or virtual LSD that uses the brakes to mimic the mechanical diff.

Exactly... Cars like the Focus ST would be undrivable without.. Same for the modern GTIs I'd imagine.... 200+hp in a FWD makes them kinda darty....