Limeted Slips & Friction Modifiers

[Guest Anonymous]

Back in Febuary there was some discusion on fluid use in L.S. differentals. Now that we've been into the driveing season awhile, what's the opinion of those who tried home brews?

[Guest Anonymous]

my friend has a quaiffe diff. in his 2002: this was the ultimate i have always wanted. But i had a long talk with my engine builder , who also builds trannys and rear ends( did not know about rear ends- they dont advertise that. Anyway, seems that the torque sensing lock-up of the quaiffe is not the ideal system. he has a better way which i am gong to get more info about. rear end building is a black art to me: i know a few guys who have stopped doing them because parts sources are diminishing and component costs are rising. But a 25%-100% range would be really nice....

[Guest Anonymous]

What did he say?

Quaiffe- well one of the guys that works at greenfields inservice races- i think an e30. I was just shootin the shit and asked for an opinion about the quaiffe and he said he used it and hated it. Only reall useful for front wheel drive. I dunno him or anything about his set up but I have also heard that if you lift a rear wheel then you got nothin- just like and open dif- which I suppose would never happen if everything is set up right. However I'd sure like to try one to see for myself.

In terms of friction modifier call redline and talk to them about it. I use there product. The dif takes standard gear oil and with no modifier its basically locked. I added 75% of the amount recomended for factory lockup but I havn't gotten my car on the road yet except for a few test runs. I can only imagine that a dif rated for 25% lock up must wear faster with less modifer or else there would be no point in building clutch packs rated for a higher lockup. I think I'm gonna rebuild mine with higher lockup and add more modifier to bring it down as necessary- some day.....

[Guest Anonymous]

about quaiffe when one wheel off ground. i will have to get his specs ( and a price) for a 2002 25-100% workable torque sensing diff. BTW: Alpina was building 40% lsd s in the day.Lots of credit due if you can engineer those guts to the desireed results. I have heard that the components are unobtaineum.

[Guest Anonymous]

(nt)

[Guest Anonymous]

URL: http://www.houseofthud.com/differentials.htm#quattro

To get to a 25, 40 or 75% ls you simply add clutch discs. There is no magic, the more friction in the clutch pack the less slip there is between wheels. Korman reguarly builds 25,40 and 75% diffs. They upgraded my Alpina rear diff to 40% by adding two discs.

If you want some good info on differentials goto this link. I have a quaife in my new 2002 MCS... wonderful feeling when both wheels grab!

WH

[Guest Anonymous]

I don't know what is better than Quaife, yet.

I have yet to lift the rear wheel on Bacchus to

experience the negative aspects of the Quaife. To

be honest I think it is an overkill for my 72 tii and my

driving style. If you have an M2 and are like

Silvanator you would take full advantage of this set

up. With the Quaife your tires become the only

limiting factor. I have taken mine to the max only

once, wet pavement on intersection making a left

turn, that is the only time I felt it squeal.

Compared that to the 40% lsd on the alpina, well,

that diff is always squealing and and adjusting.

Compared to the 25% lsd on Bacchus 2, that diff is

probably the best in terms of price/value ratio for

spirited driving.

I still think that the Quaife provides smooth, sure

footed - no surprise tracking to make it the best

that I have experienced.

This will become a mute point as I heard they no

longer make the unit to fit 2002's.

Michael

[Guest Anonymous]

all I know is that my 25% lsd is way better than the open dif. I'd love to try the quaife for comparison.