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Thread: E46 Compact Track Day Build

  1. #126
    Join Date
    Aug 2013
    Location
    SÝborg, Denmark
    Posts
    170
    My Cars
    2001 E46 325ti Compact

    E46 Compact Track Day Build

    Well thatís awesome news! Congrats on the race!

    I happy that you got the mounts fixed. Which mounts did you install? Iím installing M3 transmission mounts soon. The poly mounts I had transmitted way too much vibration so I hope the M3ís are a good compromise.

    Iím also going to change the crank pulley / damper to see if that is damaged and maybe thatíll take care of the vibrations...


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    Last edited by KlausH79; 07-18-2019 at 09:59 AM.

  2. #127
    Join Date
    Jan 2019
    Location
    Sweden
    Posts
    14
    My Cars
    Porsche 987.1 BMW 318ti
    Thank you! Quite annoyed by a bad start on race 2 which from pole position brought me back 6 cars, so had to struggle to get back to 2nd place which doesn't feel as good as it should. Need to work on my starts....I'm damn thinking too slow before making a choice on what to do!
    We installed Revshift poly (the green ones).
    I think the are great, make things a bit noisier and idd vibrate more but i don't care so much as is not a car i drive much on the road and with the 3.98 ratio differential you are at 5000rpm highway cruising which is unbearable for more than 10 min!!!

    Last thing that we found out if you ever wanna try than is that our cars benefit from a softer compound tyre at the rear and harder in the front.
    Tyre pressure is much more evenly distributed and grip out of corners is way better than on mid compound all around!! Brought my best laptime at Ljunbyhed down more than 1 sec to 1.01,3
    Really happy to see how it does in August at Anderstorp!



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  3. #128
    Join Date
    Aug 2013
    Location
    SÝborg, Denmark
    Posts
    170
    My Cars
    2001 E46 325ti Compact

    E46 Compact Track Day Build

    New parts are in. This time itís stuff I drew myself and had made by a shop.

    Spherical bearing RTABís Š la me.



    They are basically just two aluminum adapter rings with a Meyle bearing. Very easy to make and install with a press. All I need are some stainless screws.



    And upper control arm reinforcement plates



    They are slightly bigger than other designs and made in a softer mild steel so they flex more and spread the load over a larger area than the ones I bought some years ago.



    Since there was an MOQ I have a stack of plates and 2 extra sets of RTAB adapters so if anyone is in the neighborhood and wants to try them out let me know.

    Now Iím just waiting for the LSD. Mfactory Europe is not the easiest company to purchase from....


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    Last edited by KlausH79; 07-22-2019 at 03:27 PM.

  4. #129
    Join Date
    Jun 2018
    Location
    Denver - Colorado - USA
    Posts
    7
    My Cars
    2004 M3
    Slick work with the rtabs! Iím guessing these are a press fit since thereís no lip?

  5. #130
    Join Date
    Aug 2013
    Location
    SÝborg, Denmark
    Posts
    170
    My Cars
    2001 E46 325ti Compact

    E46 Compact Track Day Build

    Yep press fit....thanks!


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  6. #131
    Join Date
    Apr 2014
    Location
    Cardiff, UK
    Posts
    259
    My Cars
    E39 528i, E46 325ti
    Great build thread and good to see a compact getting some love. I'm hoping to do some fun changes on mine over winter ready for some more track days next year.

    Just a thought on the boot floor and cracking, I'm sure I read somewhere before that the compact model was the only e46 model not affected by the floor cracking, as BMW had to strengthen the floor already to account for the spare wheel being in a different location to the normal e46 body. Found one link about it, the comment is right at the end.

  7. #132
    Join Date
    Aug 2013
    Location
    SÝborg, Denmark
    Posts
    170
    My Cars
    2001 E46 325ti Compact

    E46 Compact Track Day Build

    Thanks Mr!

    Yeah I think its a cool project. I just got word that the LSD has been shipped from the UK and should arrive on Monday so itís getting closer.

    I read that article too a while back. Itís a good read for anyone with an e46. I added the reinforcements and VinceCups to my build because I was in there and for piece of mind. I of course have no data to back up this next statement but the reason for no Compacts coming in with cracks could also be due to the fact that few of them are 325ís and therefore not much power in most of them and lets face it.....itís a wifey car in most cases so they arenít driven hard for many years


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    Last edited by KlausH79; 10-27-2019 at 11:16 AM.

  8. #133
    Join Date
    Oct 2004
    Location
    France
    Posts
    124
    My Cars
    Euro M3 E36 3.0
    As always, nice work
    First time I see someone fitting chassis reinforcement without welding!

    My buddy’s 330ti is almost finished, and is pretty competitive.
    I was following him some laps last week: https://youtu.be/r3pES3dqApo

  9. #134
    Join Date
    Aug 2013
    Location
    SÝborg, Denmark
    Posts
    170
    My Cars
    2001 E46 325ti Compact
    Quote Originally Posted by ulmi View Post
    As always, nice work
    First time I see someone fitting chassis reinforcement without welding!
    Why thank you sir.

    There are plenty of people going with epoxy these days, and as far as I can tell itís a sufficiently strong method with some people of the opinion that itís even stronger than welding and better suited for this application. I found it to be an exceedingly easy process that can be done by anyone. No special skills required.


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  10. #135
    Join Date
    Aug 2013
    Location
    SÝborg, Denmark
    Posts
    170
    My Cars
    2001 E46 325ti Compact

    E46 Compact Track Day Build

    So this finally arrived!



    It seems like a beautifully engineered piece. I measured it up against the old open diff and all measurements are spot on no difference whatsoever.











    The install went very smoothly right until I found this floating around inside when I was tapping in the output seals



    I simply couldnít get it back in place on the inside of the seal so I tried to pry out the seal but it bent which I knew was a risk so I have ordered a new seal....

    So far so good





    I checked the contact patches with some white anti seize and they are spot on. I want to check the back lash but since there is no way of adjusting it Iím not sure I need to as I need to buy the tool to do it.....

    When the seal comes itís a matter of reinstalling everything. Yay!


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    Last edited by KlausH79; 08-28-2019 at 10:46 AM.

  11. #136
    Join Date
    Sep 2013
    Location
    vancouver, canada
    Posts
    21
    My Cars
    1971 2002
    Any gummy bears left?

  12. #137
    Join Date
    Aug 2013
    Location
    SÝborg, Denmark
    Posts
    170
    My Cars
    2001 E46 325ti Compact
    Quote Originally Posted by pondhopper View Post
    Any gummy bears left?
    there will be a celebratory gummy bear toast when the diff is done


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  13. #138
    Join Date
    Sep 2013
    Location
    vancouver, canada
    Posts
    21
    My Cars
    1971 2002
    Good to hear! Gummies are delish treats��

    I thought it may of been a new method to measure lash I hadn’t seen yet...
    ��

    can you you set up different ramps and clutch bites on the new piece? Curious as to what it offers if anything over the BMW diffs.

  14. #139
    Join Date
    Aug 2013
    Location
    SÝborg, Denmark
    Posts
    170
    My Cars
    2001 E46 325ti Compact

    E46 Compact Track Day Build

    Quote Originally Posted by pondhopper View Post

    can you you set up different ramps and clutch bites on the new piece? Curious as to what it offers if anything over the BMW diffs.
    Nope no ramps....no clutches....itís a helical diff.....and as for what it offers...well itís an LSD....so some degree of lock I hope


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    Last edited by KlausH79; 08-29-2019 at 02:58 PM.

  15. #140
    Join Date
    Aug 2013
    Location
    SÝborg, Denmark
    Posts
    170
    My Cars
    2001 E46 325ti Compact

    E46 Compact Track Day Build

    Well the seal finally arrived so I could button up the diff





    Poured in a quart of this as required by Mfactory











    I also got the underside painted

    All masked up





    Done



    I also gave the drive shafts a lick of paint





    Now all I need to do is assemble it all....I hope I remember how it all goes together


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    Last edited by KlausH79; 09-12-2019 at 11:18 AM.

  16. #141
    Join Date
    Aug 2013
    Location
    SÝborg, Denmark
    Posts
    170
    My Cars
    2001 E46 325ti Compact

    E46 Compact Track Day Build

    Reinstallation has commenced

    First thing was getting the fuel tank back in place



    Then I made a little subframe subassembly with the control arms







    I then bench pressed that into place







    Then I bench pressed the diff into place which was easier that I had feared





    In went the driveshaft with a new center support bearing


    The little spacers were attached with some RTV to the U-brace


    I noticed some surface rust in the center framerails(?) so I ground them down and lathered some epoxy primer on them



    U-brace mounted



    Sprayed the epoxied framerails with some black underbody coating


    I then started assembling the trailing arms so I added some screws to my home made RTAB monoballs. Theyíre press fit so probably not needed but since I had the threaded holes made I thought what the hell.


    Thatís all Iíve managed so far but I hope to get a full day in pretty soon so I can get the rear end buttoned up and begin with the oil pan gasket / oil pump nut job next.

    I also received a new crank shaft pulley/damper and front main seal



    That will be the last job before it goes back on the road and track.....canít wait

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    Last edited by KlausH79; 10-27-2019 at 11:13 AM.

  17. #142
    Join Date
    Aug 2013
    Location
    SÝborg, Denmark
    Posts
    170
    My Cars
    2001 E46 325ti Compact

    E46 Compact Track Day Build

    Now the Trailing arms are on








    The anti roll bar also got bolted in and is ready to swing into place when the springs are in and the dampers are bolted to the trailing arms. I also managed to get the e-brake cables in which wasnít that hard but not really picture worthy

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    Last edited by KlausH79; 11-02-2019 at 10:52 AM.

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