L.s.d

[30psi]

Originally Posted by wacomuk

i cant see how this set up would be reliable as you are using 2 different types of joint on the same drive shaft. CV which isn't supposed to move and a lobro joint which is designed to move. i cant see the CV joint lasting very long

They use the same type of CV joints, which is 3 spindle spider assembly type. Can't see how reliability is an issue, because the joints are working exactly as they were originally designed

[30psi]

Originally Posted by 124

I thought I might add that in the Vlsd the V stands for viscous. Viscous diffs are basically a single open diff with some friction plates that heat up a fluid which then engages the other half but only if it gets hot enough. This system works well if used for an extended period of time or if warmed up before use (eg small burnout) but generally, when driving around normally it wont do anything if you try to drift straight up. So it is a cheap alternative to a proper lsd but its like anything you get what you pay for.

Your mistaken I'm afraid.

They don't have that effect, in fact the opposite effect. Go and jack up a VLSD equipped car and you will struggle to turn the wheel on its own.

If someone was to pratt around trying to drift all day then the viscous unit warms up. Its an energy absorber. Once its hot a worn unit won't have much resistance anymore. Just like butter.

Its a damn good modification. Its not geared towards drifting. If you want drift then spend £700 on a Nismo GT pro diff.

[124]

I am not saying its a bad thing I have driven both viscous lsd and mechanical lsd i was a bit dissapointed by the vlsd. You do need a good diff to launch your car in a straight line as well as to go round corners so its not just drifters that need good diffs. However in my book(student)a cheap and easy mod is a good mod.

[30psi]

The main thing which this diff does is eliminate single wheel spin when you don't want it.

I noticed the LSD's effect most when I removed it back to a standard diff, and was surprised how frequently it would then spin one wheel. This was with circa 240bhp.

[124]

I am not surprised I recently owned a bmw e30 325i and even with about 150bhp it would spin one wheel all day, wet, dry, straight line, corners you name it. Previous to that I had a 270 bhp TVR which actually went round corners without spinning one wheel ever although I did fishtail on the motorway at 70mph in the wet, fun but scary. As for the S12 untill it gets a manual conversion the diff is the least of my worries the auto is slower than I expected.

[Draconis]

This is from Club S12 where GerryB did a short write up on what it took to get his S13 VLSD to work in the S12... which I'll be doing in the next 6 months.

I have an s13 VLSD centre in my longnose s12 type 4.11 R200. It bolted in fine after I swapped the s12 crownwheel on to it.

BUT for the RHS drive shaft I had to take the inner CV off and swap the s13 inner CV on to it and run the s13 RHS input shaft in the diff to operate the Viscous centre. Also had to cut off about 8mm off the end of the spline that goes into the diff of the LHS s12 driveshaft, so it didn't fowl on the viscous coupling.

After these mods was just a bolt up.

(I got the VLSD reshimmed also before fitting it, (extra shims) to make it real tight.)



http://www.club-s12.org/forums/index...howtopic=16318

[30psi]

The shimming thing doesn't have any impact on how the LSD works, it actually means the teeth of the pinion wheels bind together extra tight. Not good for wear and also the effect isn't smooth, its 'bumpy'.

[Conkers]

If you are on a budget and dont want to spend the value of your car on a new rear diff, I did read somewhere that a kingcab diff is plate type, as opposed to viscous, and a better performer for all but driving to the shops.
Be careful to do your homework though and find the one with the right size crownwheel bolts, I think there are two types, 10mm and 12mm... but if you get the right diff then its supposed to be an easy swap and 500 quid cheaper than a "proper" plate type diff.
We have done the scandinavian thing, and welded up the sun and planet gears, haven't done any miles on it yet as the car is still being built... but I have heard of drifters with S12's running welded diffs without any problems, although they can be a b@stard when driving slow, turning tightly and generally around town.

Welding the diff is easy enough and if you have the kit, it is free..... and IMO 100% better for drifting than a poncy viscous diff.

Conkers

[30psi]

The Kindcab diff won't work, its a live axle for a start.

Originally Posted by Conkers

100% better for drifting than a poncy viscous diff.

Conkers

No one here has mentioned fitting the S13 LSD for drifting though. The obvious choice is welding it. Only one S12 owner here is focused on drifting, but for the remainder the S13 diff is a good solution to the irritating issues of having an open diff.

[Conkers]

I said kingcab rear DIFF, not kingcab rear AXLE... read it again, and what sort of muppet do you think I am.

EDIT: No need for that sort of response to a misunderstanding. Please reply to threads politely. Thanks. RichardK.

Qualifications and proof of non-muppetness: www.racing-green.com

Conkers.