To get LSD or not?

I should receive the LSD next week - got a quote from and plan to have it installed by "THE" BMW specialists in South Africa - JSN Motors. (Dealer)

All warranties stay in place if Birds installs the part in the UK.

The "guy" from JSN has reservations however.

Not quite sure how to pursue this since, obviously, I would like all warranties to remain unaffected?
 
My experience of an LSD is it will transform the car. Yes Maniac its on a e85 but the LSD dose not only help when you braking traction. It changes the way the car drives. Turn in at the front is greatly improved its not just for when you braking traction. No amount of clever braking on one wheel can match a LSD.
 
I wished my M135i had LSD but if your looking on a 2.3 E89 I'm not so sure. I guess from a safety angle its probably worth it as I found the E89s handling very so so which was probably the runflats.

Tim.
 
You won't get a 'safer' car when you fit a LSD, it will be less safe as the chance increases that both wheels will spin instead of 1 wheel
 
TitanTim said:
I wished my M135i had LSD but if your looking on a 2.3 E89 I'm not so sure. I guess from a safety angle its probably worth it as I found the E89s handling very so so which was probably the runflats.

Tim.
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Tim why don't you fit one to your M135.???
 
GuidoK said:
You won't get a 'safer' car when you fit a LSD, it will be less safe as the chance increases that both wheels will spin instead of 1 wheel
Click to expand...

The advantage of an LSD is that it is harder to break traction, but when you do it is far simpler,for a mk1 brain, to modulate the torque and control the spinning wheels. :driving:

With no LSD, just one or the other wheel is likely to spin up and when it does the relative change in torque, is far greater, as torque to the gripping wheel is not transferred through the open diff. It literally spins away to naff all :thumbsdown:

Braking the spinning wheel, maintains some of the torque, through the open diff and is probably the safest option. But you lose a chunk of power when you do that. :o

If you are not braking the spinning wheel then I would suggest that having and LSD, is safer than not having one. Just my thoughts. :thumbsup:
 
Yorkie Z said:
TitanTim said:
I wished my M135i had LSD but if your looking on a 2.3 E89 I'm not so sure. I guess from a safety angle its probably worth it as I found the E89s handling very so so which was probably the runflats.

Tim.
Click to expand...


Tim why don't you fit one to your M135.???
Click to expand...

BMW have welded the crownwheel to the diff (no bolts) on all 135i and 335i, you can put the diff in the lathe and turn down the weld, once separated you then have to machine the correct bolt hole pattern before fitting to a lsd, a major ball ache but do-able!
 
jyonaudl said:
Yorkie Z said:
TitanTim said:
I wished my M135i had LSD but if your looking on a 2.3 E89 I'm not so sure. I guess from a safety angle its probably worth it as I found the E89s handling very so so which was probably the runflats.

Tim.
Click to expand...


Tim why don't you fit one to your M135.???
Click to expand...

BMW have welded the crownwheel to the diff (no bolts) on all 135i and 335i, you can put the diff in the lathe and turn down the weld, once separated you then have to machine the correct bolt hole pattern before fitting to a lsd, a major ball ache but do-able!
Click to expand...

Birds do an LSD for the M135i at a very reasonable cost :)

http://www.birdsauto.com/news/bmw-m135i-quaife-limited-slip-differential

I'm tempted.

Tim.
 
buzyg said:
With no LSD, just one or the other wheel is likely to spin up and when it does the relative change in torque, is far greater, as torque to the gripping wheel is not transferred through the open diff. It literally spins away to naff all :thumbsdown:
Click to expand...
Yes. That means that you're more likely to have a wheel that does not spin. So you won't go as fast (no power to the wheel that doesn't spin, less overall traction), but you also won't go sideway's in dangerous conditions.
So the bottom line is: if you have a LSD don't turn the stability control/traction control off in slippery conditions when you're not 100% focussed.

Yorkie Z said:
Hour and a half's work for an experienced engineer, easy...!! :thumbsup:
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If you have the machines.... ((cnc) lathe+mill)
Welding the crowngear to the diff (some models in 1/3 series, e89?) was not BMW finest moment.... :thumbsdown:
It makes sure that home installation is impossible...
 
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