Lsd

[new to this]

Has any one fitted a LSD in a Stag dif

Dave

[Motorsport Micky]

I've not, and unless you like changing factory induced understeer into UNDERSTEER I would be wary of fitting one.
The LSD will increase the grip at the rear and help prevent the balance of handling between front and rear in it's neutral to understeering state it's set in, increasing it.
Manufacturers like understeer, for lesser talented drivers (the majority of the public) entering a corner at too fast a speed will mean the car wants to go straight on, reducing speed reduces the understeer and the car goes around the corner...it's safe and predictable. When you race a car with a LSD and the car understeers you INCREASE the throttle which causes more rear tyre slip (not slide) where the squirming tyre carcass reduces the grip and the handling of the car returns to neutral or oversteer

Like this Fangio drifting.png

Are you going to drive your Stag like this on the public roads ? or are you planning to use the LSD to extract yourself from mud patches ?

Micky

[Kithmo]

lysergic acid diethylamide ?
It was popular in the 60s IIRC

[dasadrew]

probably the most useful LSD for a Stag owner! Lucy in the Sky with Diamonds - yeah!

[tractorjames]

I keep thinking of buying a lsd as i keep blowing planet gears out of standard diffs but im struggling to come to terms with the price of them
at the moment, plus the effort of fitting in the casing and setting up

[Carboy0]

Tractorjames, I have got to ask, what are you doing with your Stag? Track days, racing, loose surface driving?

If set up properly they should last for 10s if not 100s of thousands of miles.

[tractorjames]

Tractorjames, I have got to ask, what are you doing with your Stag? Track days, racing, loose surface driving?

If set up properly they should last for 10s if not 100s of thousands of miles.

One occasion was doing a burnout finnishing off some old tyres and then its bad for doing it when you are on a wet suface with a bit of loose stuff on top (back lanes round us are all like this in places) with back tyres spinning and then come across spme grip.

[Carboy0]

Ah, “hooning about” then , that’ll do it every time.

[jakesmig]

I have an LSD and uprated driveshafts in my Midget and haven't experienced any additional tendencies for the car to understeer, and the tendency to oversteer has been greatly reduced. That being said, the speed where oversteer does come in has increased which makes things interesting.

My millstone has a 3.9 RV8 fitted and I have no complaints regarding the standard Stag diff which is installed, it seems content to take the additional power, including occasionally 'lighting up' the rear end, expected or otherwise.

One point I would make, I never 'drop the clutch' to get the wheels spinning, or to 'get off the line' quickly, I always took that habit as one which bursts drive shafts and half shafts, or in this case planet gears.
I always get the car moving, and it only requires a bit of motion, before flooring the throttle, it is far kinder on the drive train.

The only time our rally cars had drive shaft or half shaft breakage was when the clutch was dropped at high revs, or when the steering was on near full lock .

[TR5convalescent]

I remember a chap in a 427 Cobra kit at Le Mans about 20 years ago, dropped the clutch at about 5000rpm and there was a noise like a pistol shot and the car jinked slightly. When we got to the rear end we discovered a broken drive shaft yoke on the hardy spicer. What really impressed was that the shaft had a manufacturer’s line along its length which had twisted about 15 degrees out of true.

[Motorsport Micky]

"I have an LSD and uprated driveshafts in my Midget and haven't experienced any additional tendencies for the car to understeer, and the tendency to oversteer has been greatly reduced."

Err...that's because the LSD has INCREASED the understeer...happily that counters the oversteer tendencies which are obviously more pronounced on your Midget. That is what I said, an LSD increases understeer ??? it's just that with the Midget you don't start from the same under steering base as a Stag.

Micky

[jakesmig]

Don't think I said it did, and I don't think anyone would presume i was comparing the Midget to the Stag, merely commenting on what I found with my Midgets alternative rear axle.

Regarding the under steering base of the Stag, with adjustment to the front camber angle and minor adjustments to the rear / front tyre pressure mine is reasonably neutral, although the significant weight difference in engine will have a marked effect as well.

[dasadrew]

... What really impressed was that the shaft had a manufacturer’s line along its length which had twisted about 15 degrees out of true.

Standard procedure on a RWD Escort is to paint or stick a white line along the length of the driveshafts to "occasionally" check for twist!

[TR5convalescent]

Standard procedure on a RWD Escort is to paint or stick a white line along the length of the driveshafts to "occasionally" check for twist!

Hm! The question is; what do you do if you find it?

[dasadrew]

Sort of depends on which ss you're on!