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  • Digitalwave
    replied
    Thanks!
    Last edited by Digitalwave; 11-19-2019, 11:23 AM.

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  • Sh3rpak!ng
    replied
    Originally posted by Digitalwave View Post
    Also, anybody have a current link for the TIS? The link on page 1 is broken.
    TIS: https://www.newtis.info/tisv2/a/en/

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  • Digitalwave
    replied
    Assuming an un-touched original E30 M3 4.10 LSD, probably 150k-200k miles on it. How noticeable of a difference would it be to just rebuild it "stock" 2 clutch with new races and clutches? Car is for circuit use only. Sounds like this is the best option unless upgrading to an aftermarket racing unit like OS Giken.

    Also, anybody have a current link for the TIS? The link on page 1 is broken.

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  • Wanganstyle
    replied
    Deleted
    Last edited by Wanganstyle; 09-08-2020, 02:50 AM.

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  • abit
    replied
    one quick question! :D

    yesterday teared up my diff, in one moment things got interesting...


    nevermind.....so, lil bit lost in parts sequence
    i have grinded different ramp angles.
    increased angle on acceleration.
    I think they were positioned like this...is this right?

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  • Wanganstyle
    replied
    Deleted
    Last edited by Wanganstyle; 09-08-2020, 02:51 AM.

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  • TheB1G Lebowski
    replied
    Hello,

    I'm trying to find the answer through this thread but I think that my question is a little more vague than most on here. But what i'm wanting to learn is which LSD will fill the role for the average DD while slipping out on back roads once and a while to carve a few corners up in the country.

    Just something good on the highway and street, but still have enough on the bottom to get out of its own way. The thing that is really sucking is when I try to go up a steep drive way (my house, which I don't even think about anymore lol) or an entrance to a parking lot and my coilovers bottom out and my open diff is just laughing at me while my wheel's hanging out up in the air doing a lot of nothing.

    Thank you so much!

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  • Wanganstyle
    replied
    Deleted
    Last edited by Wanganstyle; 09-08-2020, 02:52 AM.

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  • mindspin311
    replied
    Originally posted by Wanganstyle View Post
    Not gaining anything besides understeer.

    Bmw kinda really knows what they are doing with the factory lsd setting. If yours is worn out and your budget is limited to DIY Then just making it new Oem 2 plate spec is the best you can do.

    Oem new 2 plate configuration is better handling than 3 with free data setting; free data on the internet from folks selling subpar knock off parts is just that.

    Want real parts? Bmw and Porsche sell the real zf stuff.

    Want cheap crap; check with gayer “motorsports” or some place in Eastern Europe

    If you have a budget for a full unit build with national championship results (my local clients swept nasa National tt4 class with 1-2-3 place finish 2018, local spec Miata won overall); I can assist.

    Winning spec data will never be shared for free.
    Really don't have the budget for a full build. I can DIY most of it. Just not sure the route to take. Can measure, etc, get cap machined for a 4 clutch if it's the right direction.

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  • Wanganstyle
    replied
    Deleted Winning spec data will never be shared for free.
    Last edited by Wanganstyle; 09-08-2020, 02:52 AM.

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  • mindspin311
    replied
    Question based on a sort of non-ideal situation..

    E28 3.25 2-clutch diff - If I simply disassemble the thing, pull the spacer, add 3rd clutch/dog ear, replace the original clutches/dog ears, reassemble.. what am I gaining?

    Car is an M52 w/Schrick cams swapped E30, going to be a pure track car. Looking to maximize corner exit grip, reduced oversteer on exit.

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  • Wanganstyle
    replied
    Deleted
    Last edited by Wanganstyle; 09-08-2020, 02:53 AM.

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  • TobyB
    replied
    Racing the E30 in PRO3, the Torsen doesn't seem to work so well.
    Whether that's partially due to setup, I do not know, as I have never tried one.

    The cars with OSGiken diffs DO hook up very well. They also tend to have other
    very nice parts as well.

    t
    just watching the front of the pack...

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  • Wanganstyle
    replied
    Deleted
    Last edited by Wanganstyle; 09-08-2020, 02:53 AM.

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  • The Dark Side of Will
    replied
    Originally posted by Wanganstyle View Post
    Not all lsd units have preload in them.

    If there is no delta between wheels the ramp section has no reason to expand.

    Obviously there must be input from the drivetrain (either positive or negative) otherwise the differential just rolls

    If there's no positive or negative driveline torque, then the axle-to-axle torque is limited to the preload produced by the diaphragm/marcel springs as they squeeze the clutch packs. Driveline torque is what drives the pin in between the ramps.

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