To LSD or not?

[DR-JEKL]

I know of an owner who said he was actually slower down the strip with his LSD fitted.

This doesn't mean that it isn't useful, just that he needs to practice his launching technique with his LSD fitted.

[Stohlen]

Originally Posted by DR-JEKL

I know of an owner who said he was actually slower down the strip with his LSD fitted.

This doesn't mean that it isn't useful, just that he needs to practice his launching technique with his LSD fitted.

The strip is a well prep'd surface in which you are only traveling in a straight line. The difference between an LSD and no LSD is minimal compared to the difference on an uneven surface like the street or road course where you may be turning. That's where you'd see a real difference.

[Marc_28i]

Hello guys I am new here I recently bought a mega Frankenstein of a car on paper it is a 128i at it has an n54 6mt upgraded clutch and some m3 suspension part a finned diff... The previous owner didn't know a lot abou it but said it has an m diff I suspected to have an lsd jacked up the car in neutral both Wheels turn in the same direction but in gear turn opposite direction and is hard to turn any clues?

[bbnks2]

Originally Posted by Marc_28i

Hello guys I am new here I recently bought a mega Frankenstein of a car on paper it is a 128i at it has an n54 6mt upgraded clutch and some m3 suspension part a finned diff... The previous owner didn't know a lot abou it but said it has an m diff I suspected to have an lsd jacked up the car in neutral both Wheels turn in the same direction but in gear turn opposite direction and is hard to turn any clues?

M diff has clutches engaged by wheel speed difference (viskolok). It is very possible the wheel would not be locked at such low speeds. you will feel some drag from the clutches but wheels will spin independently.

[bbnks2]

Originally Posted by Stohlen

The strip is a well prep'd surface in which you are only traveling in a straight line. The difference between an LSD and no LSD is minimal compared to the difference on an uneven surface like the street or road course where you may be turning. That's where you'd see a real difference.

yeah people think LSD is some magic item that will make them 10x faster. Stock brake torque biasing works really well especially in a straight line for drag application. People have cut some VERY low 60' times on the stock diff.