LSD , what options are there ?

[Zacky94]

What options are there for a LSD that will fit in a 85' 280i
I believe it's a sailsbury one at present

Ps. Does anyone know the ratio of these also ?

Many thanks in advance,

Zack

[Transmitter Man]

Hey Zack,

I've had one of these fitted in my diff:

http://quaife.co.uk/quaife-products/quaife-limited...

One day/year my car will be finished so I cannot tell you right now of the benefits

Phil
420 SEAC

[Zacky94]

That's the sort of thing I'm after if there's nothing O.E that will fit

Thanks!

And I know that feeling mines been a 'work in progress' for 4 years now!

[Transmitter Man]

4 years you say, snap!

Page 1

http://www.pistonheads.com/gassing/topic.asp?h=0&a...

Phil
420 SEAC

[Wedg1e]

The standard diff typre was a Salisbury 4HU as used on the XJ6, XJS, late E-types etc. and the usual ratio on a Wedge is 3.54:1. There were options, 3.31 and 3.09 being the most common - and of course you could have the PowrLok limited-slip version of them all as well.
Changing to a different type is a major job as the inboard brakes will no longer work, but the standard hubs don't allow for outboard discs either. Most modern diffs are intended to be used with CV-type driveshafts so if you fancied reworking the entire rear end of the chassis and most of the drivetrain you could presumably make it work...

[bluezeeland]

The standard is indeed a Salisbury 4HU, with what should (should...) be 3.31 ratio, there is a tag on the diff denoting the ratio

A 3.54 can be had (some searching in order/if not already ?)

Mine, (in a 3000S) has had a gripper lsd installed beginning of the year, all in the original diff case

A salisbury has the brackets to take inboard brakes

[Zacky94]

What a fantastic read that was phill some quality ideas and thoughts there
Great stuff! Hope to see it about !


To be fair I have been thinking about this trailing arm set up and re working the rear end some what but I was thinking more suspension wise to handle the extra power rather than differential / brake relocation wise

I may just get some LSD guts inside my casing to be honest sounds like the best idea otherwise my wedge will never be done with the other jobs I have lined up on it !

Thanks for all the info nice to know abit more about the old girl

[Wedg1e]

bluezeeland said:

The standard is indeed a Salisbury 4HU, with what should (should...) be 3.31 ratio, there is a tag on the diff denoting the ratio

A 3.54 can be had (some searching in order/if not already ?)

I believe you have the ratios the wrong way round, 3.54:1 was the standard. 3.31 (or 3.09) allows the car to cruise at higher speed with (fractionally) lower revs but has a detrimental effect on acceleration - most people buy a sports car to shift, not bimble

[Transmitter Man]

Zack,

Speaking as a complete non-engineer what I believe would offer the most benefit in any restoration of these cars is to stiffen the chassis, as I have had done.

the flex in the original design was something to behold and any flex kind of defeats the object in any other work you carry out to try and improve handling.

I could be wrong.

Just my 2p.

Phil
420 SEAC

[Zacky94]

After All the threads I've been reading I think it is the way to go
Seems like a lot of problems with tailing arms being the biggest culprit

Have to get the scetch pad out and have a doodle for some ideas

I've already designed the front end

Now for the rear end!

Thanks for the inspiration phill

Zack

[bluezeeland]

Wedg1e said:

bluezeeland said:

The standard is indeed a Salisbury 4HU, with what should (should...) be 3.31 ratio, there is a tag on the diff denoting the ratio

A 3.54 can be had (some searching in order/if not already ?)

I believe you have the ratios the wrong way round, 3.54:1 was the standard. 3.31 (or 3.09) allows the car to cruise at higher speed with (fractionally) lower revs but has a detrimental effect on acceleration - most people buy a sports car to shift, not bimble

Yes, could be right that in the wedges 3.54 was used, but as said in the M' it was 3.31 original. Hence why I changed to 3.54 for exactly the reasons you are mentioning (and believe you me, it shows !)

[Zacky94]

Ratios arnt so bad then , not a lot of point in going much higher with out a considerable lack of top end

Different horses for different courses I suppose

[Adrian@]

The ratio quoted as 3.09 should read 3.07.
Adrian@

[Wedg1e]

Adrian@ said:

The ratio quoted as 3.09 should read 3.07.
Adrian@

Sorry, my mistake... think I'm mixing it up with the 2.8i Capri diff that was a completely different animal