Big LSD Shootout... OS Giken, Drexler, Titan, GKN, ZF...

[Track/S]

Originally Posted by driftflo

the second picture is not from me! the lsd pictured there was not built by me!

i did not say it does not work. a m3 e30 also still works. but i doubt you will win any rallye with this car in nowadays. development goes on...

It doesn't matter who the photo is from, the ramps are from Drexler.
The M3 E30 may not win any rallies in nowaday but if it had those ramps it means it works.

[driftflo]

Originally Posted by Track/S

It doesn't matter who the photo is from, the ramps are from Drexler.

correct! drexler has the ramps pictured (45/30°). i also have them in stock in standard and also lightweight version... if one wants them!

Originally Posted by Track/S

The M3 E30 may not win any rallies in nowaday but if it had those ramps it means it works.

i am not sure if you got me right in my last posts?! i did not say a 30° ramp does not work! it does! ... but in a way i would not say is any close to working "good".

bmw used the gkn viscolok units in ten thousands of e46, e85, e60 and e92 m cars. so one could also say: "this means it works" ;-)
and yes, they work... in one way or another...

so in the end... what are you looking for: something that works? something that is quite ok and a bit better then before? something that is really good? or you want the best?
i am looking for and selling the last two options only ;-)

[Track/S]

Originally Posted by driftflo

correct! drexler has the ramps pictured (45/30°). i also have them in stock in standard and also lightweight version... if one wants them!




i am not sure if you got me right in my last posts?! i did not say a 30° ramp does not work! it does! ... but in a way i would not say is any close to working "good".

bmw used the gkn viscolok units in ten thousands of e46, e85, e60 and e92 m cars. so one could also say: "this means it works" ;-)
and yes, they work... in one way or another...

so in the end... what are you looking for: something that works? something that is quite ok and a bit better then before? something that is really good? or you want the best?
i am looking for and selling the last two options only ;-)

I understood you correctly, what is not clear to me is why you should not use 30° and since I do not have an answer to that question I will make ramps with almost all possible configurations to understand which one works best for my driving style.

I'm not looking to show off my carbon discs on Instagram, I'm looking for effectiveness and to make the car as fast as possible on mountain roads.

[driftflo]

great idea!
this is exactly what i did the last 13 years... testing and building more then 2.000 lsd cores and not just rely on other people and what they post in social media!

[OmairK]

Driftflo, have you ever had experience with Carbon-fiber Driveshafts? Any advice?

[driftflo]

Originally Posted by OmairK

Driftflo, have you ever had experience with Carbon-fiber Driveshafts? Any advice?

no! i cannot say anything about these shafts.
i do concentrate on lsd setups and bmw rear axle diffs (and everything inside them). i cannot contribute too much on anything outside the diff, tbh.

[Damocell]

Having read this entire thread I'm after some advice if possible although it isn't related to a e9x M3.

I recently bought a Z4 3.0 Coupe which will be used on track and road. It has an open diff at the moment and can brake late into corners on track without upsetting the rear end. Obviously, it isn't as powerful as the M3 with only 265ps and 315nm.

I'd like to be able to steer the car from the rear more but not induce more understeer mid-corner or under-braking

Which would you say would be a better option on track for the ZF unit?
30/60 4 clutch packs
37.5/60 4 clutch packs
30/60 3 clutch packs

Also would you advise a small amount of preload or none at all?

Hope you don't mind the questions, as people have said, this can get confusing.

[driftflo]

Originally Posted by Damocell

Which would you say would be a better option on track for the ZF unit?
30/60 4 clutch packs
37.5/60 4 clutch packs
30/60 3 clutch packs

Also would you advise a small amount of preload or none at all?

again: i would not suggest 30° ramps, i would not suggest uneven clutch amounts... (and i would avoid shops that do offer this)!
i'd use a certain amount of preload that fits the application of the car but therefore you need special belleville washers different from the oem ones. but if these washers are of bad quality this can lead to massive problems as well. so it is not just a certain setup that is good or bad but the complete "package" must be good and high quality. plus the correct assembly clearance.

[--Aramis--]

Two years of mountain driving with driftflo setup here what a such nice setup

Thanks again Florian

[supergoji]

mine is a diffsonline race diff for DCT

REM polished 3.62 gears
REM polished bearings
10 disc 50/70 ramp
Race carrier

definitely throws you out of corners.

[swalko]

Does anyone tried racingdiffs kits? https://racingdiffs.com/products/bmw...al-rebuild-kit . I dont need to modify diff, i only want to rebuild it because of m clunk. Sorry if this question is offtopic, but i not found any relevant info about racingdiffs kits.

[bigjae1976]

Originally Posted by swalko

Does anyone tried racingdiffs kits? https://racingdiffs.com/products/bmw...al-rebuild-kit . I dont need to modify diff, i only want to rebuild it because of m clunk. Sorry if this question is offtopic, but i not found any relevant info about racingdiffs kits.

I have not had a good experience with the LSD unit rebuilt kit on two different cars. The LSD didn't retain the preload. Could be an installer issue...had a BMW master tech build the 2nd one. I gave up on trying to make it work.

[swalko]

Originally Posted by bigjae1976

I have not had a good experience with the LSD unit rebuilt kit on two different cars. The LSD didn't retain the preload. Could be an installer issue...had a BMW master tech build the 2nd one. I gave up on trying to make it work.

Thank you, I was expecting that. It worked for a while or it doesnt worked at all?

[g2]

I have the same question. I was just about to RacingDiffs friction disc kit for my f82

[bigjae1976]

Originally Posted by swalko

Thank you, I was expecting that. It worked for a while or it doesnt worked at all?

Worked for a little bit. We added more preload, worked a little bit and then no more lock up.

[driftflo]

the ones i removed from some customer-delivered diffs (which had these clutches installed themselfes or somewhere else) are worn out after ~500-1.000km (or even less in racing applications).
the clutches then look worse then a 250.000km oem clutch disc.

tbh, it is not that easy to manufacture such discs in high quality and durability. even drexler and zf do not produce them in house but do have a specialist company that produces these discs for them with all the additional heat- and surface-treatments required to make them last.

to date i never saw an aftermarket clutch disc that lasts nearly so long and comes close to the performance of the original zf/drexler parts. but i saw a lot of these aftermarket clutches failing prematurely (incl. collateral damage they caused). this is why for me there is no alternative to zf/drexler friction discs.

[Track/S]

Originally Posted by swalko

Does anyone tried racingdiffs kits? https://racingdiffs.com/products/bmw...al-rebuild-kit . I dont need to modify diff, i only want to rebuild it because of m clunk. Sorry if this question is offtopic, but i not found any relevant info about racingdiffs kits.

Run away from racingdiffs, they're pure trash.