The ultimate Limited Slip Differential thread?

[davidppp]

Yeah.

In short..ZF or Guard for performance...Torsen is Ok on the road, for snow and ice..

er. the japs may be good too...

David

[MikeB]

Bert

The best thing to do is to look at all the various manufacturer's sites and see what they say.

All diff that use plates ( i.e. everything but the Quaife) will eventually wear out, to where you need to replace all or some of the plates. Obviously, it's also a "how long is a piece of string" question as if you are doing a lot of cornering or using them is "spirited" driving they will wear out quicker.

The Quaife, they claim, doesn't have any wear on the components because they are geared and don't rely on friction. So it is probably the fire and forget option as far as additional servicing.

[johndglynn]

Get the proper thing in there. You know it makes sense!

[veryporky]

Like MikeB my only LSD experience was in an Alfa. 2000GTV of 1972 YOM. The effect on the cars balance was stunning. It allowed you to steer the car on the throttle in a perfectly safe and controlable manner esp on tight hairpins. A heavy lift off during the early part of the corner would induce lift off oversteer allowing the back to swing lsmoothly out. One would allow this to continue until the car was pointing directly at one's chosen apex. At this point a swift application of throttle would lock the wheels right into the tarmac with 100% confidence allowing for a sharp, precise exit. All done with the throttle and a flick of the wrist. Through fast corners a slight lift and re application would set the car up in the most electrifying way. Multiplied the smiles per gallon by 4++ times

In an unrelated thread somebody was quoted as saying that an LSD should be considered as part of the chassis as opposed to part of the running gear due to the profound impact it has on balance and handling.

I have always wondered whether a similar result could be achieved with a 911 bearing in mind its very different weight distribution. Watching competition footage of 911s I'm sure that they are adopting a similar technique and that it could be but the number of variables with regard to clutches, ramps etc is mind boggling. Perhaps a set up as near as possible to the orginal 911 ZF would be a good starting point. Crunch time is nearing though as am planning to pull the 'box on the 2.7 later this year.

[pete917]

Do Quaife do one??

I use Quaife.

[MikeB]

I use Quaife

.


So what's it like then Pete?

[jwhillracer]

At this point a swift application of throttle would lock the wheels right into the tarmac with 100% confidence allowing for a sharp, precise exit. All done with the throttle and a flick of the wrist. Through fast corners a slight lift and re application would set the car up in the most electrifying way. Multiplied the smiles per gallon by 4++ times

In an unrelated thread somebody was quoted as saying that an LSD should be considered as part of the chassis as opposed to part of the running gear due to the profound impact it has on balance and handling.

I have always wondered whether a similar result could be achieved with a 911 bearing in mind its very different weight distribution. Watching competition footage of 911s I'm sure that they are adopting a similar technique and that it could be but the number of variables with regard to clutches, ramps etc is mind boggling. Perhaps a set up as near as possible to the orginal 911 ZF would be a good starting point. Crunch time is nearing though as am planning to pull the 'box on the 2.7 later this year.

Very similar with a 911. (see the avatar!) Having had the same ZF equipped LSD (in several different gearboxes and two different cars ) for 25 years, it's hard to remember what a 911 handled like on the limit without one. Unless it's an out and out circuit car, leave it on 40%, and then go for a test somewhere quiet, explore the handling changes, and be prepared to change your anti-roll bar settings.

Cheers!

JW

[Bertroex]

prepared to change your anti-roll bar settings.

Aha, yes, I had something in mind but all needs to be discussed at that point....


Thanks for your responses!


Bert

[kenikh]

A similar thread I answered on another BBS:

http://www.early911sregistry.org/forum/ ... hlight=lsd

Great photos.

[Cam Arnott]

Bert

I have just had an Aussie made Modena LSD put in my 911 transmission. I understand Modena supply to Guard in the US.

Very happy with it It has improved the predictability of the handling, allows you to get on the power earlier, and allows you to trail brake later into corners. Just makes the car feel more 'planted' on the road.

Well worth it!

Cheers

[kenikh]

Bert

I have just had an Aussie made Modena LSD put in my 911 transmission. I understand Modena supply to Guard in the US.

Very happy with it It has improved the predictability of the handling, allows you to get on the power earlier, and allows you to trail brake later into corners. Just makes the car feel more 'planted' on the road.

Well worth it!

Cheers

Cam, How many AUSD for one?

[Cam Arnott]

Hey Kenik

$3054.00 AUD to be precise !

Cheers

[Bertroex]

Hi Cam and others,

Thanks for your feedback. I was looking at the "value for your pound" as well as trying to find the most suitable LSD for my car.

Live rates at 2009.03.10 11:33:09 UTC

3,054.00 AUD=1,413.33 GBP
Australia Dollars United Kingdom Pounds

1 AUD = 0.462780 GBP 1 GBP = 2.16085 AUD

For not a lot more, or dare I say less in case of a second hand unit, one could go for the ZF...?

Obviously there are some further costs to be calculated for the bolts as well as setting up the LSD and putting it in.

Anyhow, many thanks to everyone for your information and feedback.


Best regards,


Bert

[kenikh]

Hey Kenik

$3054.00 AUD to be precise !

Cheers

$1986 US. Hmmm, not sure if that is good or bad?

[Cam Arnott]

Ahh what price happiness!?