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04-01-2018, 08:18 AM | #265 | ||
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If you put your diff back in the car and it is whining, LOUD, it was probably set up improperly. Granted, i have solid everything with no rear, but still i knew something was off. Pulled it back out and got it redone, and it sounded like it was supposed to. I did not get any treatment, as Florian and i discussed it does not really do much in regards to a part time track car. If it was a full blown race car, in which i was doing enduro and long stints i may have done a polish.
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04-04-2018, 12:20 AM | #266 |
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i'm kinda curious if the bearing/gear polishing could extend the life of the clutches... less heat generally means a longer service intervals.
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04-04-2018, 02:51 AM | #267 |
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the clutches wear due to dynamic friction. heat is not that important for them.
i am pretty sure that it has no relevant influence on clutch wear! |
07-25-2018, 04:06 PM | #268 |
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as promised here are a few pics and infos on the m2 and m4 diff conversions that i recently did:
here you see the OE pumpkin with the active m-diff: on the left an untouched pumpkin and on the right three already removed active lsd cores: next up the welded ringgear needs to be separated from the lsd core: surface need to be shaved perfectly even: then holes are drilled and threads cut: now it is time to build the drexler lsd core... here with my special "GT race" setup that is also available for m3 e92 of course... drilled clutches, weight optimized pressure rings, ... nice stuff in there! installed in the pumpkin and with properly set dynamic friction and backlash it looks like this: if you want to see some more pics just click here: http://www.limitedslip.de/service/ei...rexler_m4.html |
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07-26-2018, 08:50 AM | #269 |
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this thread is awesome. i did a lot of rear diff research for my evo, went with a cusco 1.5 type RS, which I think functions relatively similar to OSG. I think all the salisbury clutch diffs are similar though
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07-27-2018, 09:27 PM | #270 |
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Impressive work driftflo
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07-28-2018, 12:25 AM | #271 |
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driftflo what is the theory with the drilled clutch plates? oil evacuates out of there sooner for faster lockup once it starts?
also, are any of these setups significantly less weight than oem? i don't know if they are or not, but i figure any less rotating mass in the driveline is going to help.
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07-28-2018, 04:29 AM | #272 |
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the holes improve oilflow between the clutches. so the transition from lock to open and vice versa will happen smoother. the car behaves less aggressive without compromising the (locking) performance.
you can save ~10% of weight compared to the OE LSD. and as this is rotating mass it does add some small amount of performance. not much, but it is a nice side effect you get while improving the lsd performance. OS giken is even heavier as the OE unit. drexler slightly lighter. the lightest core is the bacci romano one but this one needs special output flanges that do add some weight again. and it is not capable of taking so many clutches as the drexler does. so you could make the drexler a little lighter still if you remove some internals (that would downgrade the performance)... so that does not make sense! Last edited by driftflo; 07-28-2018 at 04:57 AM.. |
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07-28-2018, 04:49 AM | #273 |
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driftflo, you're the man. i appreciate you sharing this with us. when the time comes for me to upgrade, we'll be talking!
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07-28-2018, 09:24 PM | #274 |
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Hi, I was informed that running traction control (MDM mode) while on track is actually harmful if you have an OS Giken LSD. Is that true?
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07-29-2018, 02:05 AM | #275 |
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no!
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07-29-2018, 11:37 AM | #276 |
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I have a DCT car and I believe it's the diff thats making some bad noises and clunks. What would you reccomend for a street car that see's a ton of very hard spirited driving? Is the 3.45 available? Is Wavetrac a good choice for a car like this?
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07-29-2018, 05:32 PM | #277 | |
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The 3.45 has worked fine without any rev match issues? Im assuming you didn't tune the dct. I have heard mixed reviews on the Quaife so I would like some more input.
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07-30-2018, 01:49 AM | #278 |
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a torsen like wavetrac or quaife is better than the OE viscolok. if you have no direct comparison to a clutch type drexler, you will be happy. if you have, you will always opt for the clutch type unit.
this is the reason you read mixed experience with torsens. the ones that have no comparison do like it, the others are disappointed. people often want a torsen because they are advertised as "maintenance-free". but this does not mean they are "wear-free". they do wear and if they are worn out they need to be completely replaced and cannot be rebuilt like a clutch type unit. if you want to go the torsen route anyway, i'd suggest the wavetrac over the quaife. wavetrac is the best torsen unit out there. |
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07-30-2018, 05:03 AM | #279 | |
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Great to know! I was considering the 3 clutch style as I've read that's good for street and hard driving as well. I'm just hung up one how it will effect the transmission.
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08-01-2018, 03:11 AM | #280 | |
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i'd at least use 4 clutchpacks PLUS a cupspring. currently i still have two 45% rebuild kits (4 clutchpacks, cupspring, installation instructions) available at my local US distributor. you only need an old 210 zf lsd core as a basis. |
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08-01-2018, 11:00 PM | #281 | ||
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08-02-2018, 08:18 AM | #282 | |
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08-08-2018, 04:08 PM | #283 |
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08-08-2018, 04:10 PM | #284 |
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pn me and i will give you the contact of my US distributor. i guess he can provide a complete unit with my internals installed.
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08-09-2018, 01:50 PM | #285 |
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I recently sealed up my diff for the first time and even though I laid out a relatively thin bead of gasket maker (Permatex Ultra Black), by the amount of goop that squeezed out on the outside after sealing, I'm sure there's even more on the inside. I assume that even if it breaks off on the inside, it'll be harmless to the gears/LSD?
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Last edited by DavidZ; 08-09-2018 at 02:01 PM.. |
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08-20-2018, 08:05 AM | #286 | |
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How do I contact you about wanting to buy your LSD? I have read and would be interested. Thanks |
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