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Thread: Z3M Coupe for trackday use

  1. #201
    Join Date
    Dec 2016
    Location
    France Clermont Ferrand
    Posts
    175
    My Cars
    Z3M Coupe '98 X3 3.0i
    "The reason that stiffer sway bars come before springs and shocks is that they only affect a car's handling once the suspension starts to load in a corner."

    You're right, thanks I save 2 seconds a lap with stiffer HR anti roll bar vs OEM one. Where can we find bigger anti roll bar like yours ? What is the weight of your car and which springs do you use ?
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  2. #202
    Join Date
    Jul 2008
    Location
    Salem, Nh
    Posts
    1,657
    My Cars
    01 Z3M Coupe
    Wow 2 seconds is a great improvement congratulations!

    This is the front sway bar I used; https://groundcontrolstore.com/colle...front-sway-bar
    Same as an e36M3 on the front

    For the rear I think I got it from H&R

    My car weighs 1195 kg with a full tank of gas

    My spring rate in the rear won't be compatible since I'm running a true coil over configuration in the rear rather than inboard springs but for reference I have 881 Nm front and 474 Nm rear

    You can check out my build here if you want; https://www.bimmerforums.com/forum/s...-to-full-Track
    and my recent modifications to the rear suspension here: https://www.bimmerforums.com/forum/s...d-on-Z3M-Coupe

  3. #203
    Join Date
    Dec 2016
    Location
    France Clermont Ferrand
    Posts
    175
    My Cars
    Z3M Coupe '98 X3 3.0i
    Drop off the back to revise the limited slip, , the inner wheel was a lot sliping, probably the disk to change. Thank you the brand-new pit jack. It's super fast to do. it was strange to slip like this i believed in my 203 Peugeot who did this when I "shaked it" a little



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  4. #204
    Join Date
    Dec 2016
    Location
    France Clermont Ferrand
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    175
    My Cars
    Z3M Coupe '98 X3 3.0i
    I got the female unibal, and I was able to finish the rear roll bar links:


    I changed the two soft mount of gearbox, I think there was a need! I get from bmw origin, in accordance with my justified beliefs or not the flexible mounting of the engine, box and bridge relieves the mechanics of transmission.




    Then temporary winding of the rear train, I'm going to mount a backup, which is actually a second bridge fixation.




    Here is the ordered backup model
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  5. #205
    Join Date
    Dec 2016
    Location
    France Clermont Ferrand
    Posts
    175
    My Cars
    Z3M Coupe '98 X3 3.0i
    Installation of vac motorsport decks, They were planned for e36 e46 so between 36 cm while the Z3M has 34 cm, A friend machnied it thank you !,
    This is really great product, finally it can at Gold Price: : we note that scp shop provides identical prices at much more reasonable price; always in distance 36 cm E46 / e36




    Brackets Aluminium Brackets and headquarters seat approved until 2022, special small cockpits



    Gain on seat 200 grams, and 1,8 kilo on various fixings, be 2 kilos of won on the pilot seat.



    Installation little decks approved for the safe belt number 5 and 6. They must be fixed by 2 screws (FIA).
    The seat in place

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  6. #206
    Join Date
    Dec 2016
    Location
    France Clermont Ferrand
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    175
    My Cars
    Z3M Coupe '98 X3 3.0i
    In order to solve two problems, the Z3M's weak point , this OEM type e30 fitting up to 200 HP and the associated torque, the specific alloy covertends to crack, so I bought a kit in the USA from Garagistic. Com for e30 (which is not suitable for z3m but I knew it)

    The installation of this kit is impossible by the presence of the silencer and the large anti-Roll Bar which does not facilitate the passage either.




    The solution is Machining The Carter to position the backup ideally compared to the cross and the constraints mentioned above.








    The arrows show where to work with the milling machine.




    The room is replacing the part from the kit.
















    It will then be necessary to weld the fasteners and modify them to measure.

    The example shows the fixation kit on a e30.



    [/quote]
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  7. #207
    Join Date
    Dec 2016
    Location
    France Clermont Ferrand
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    175
    My Cars
    Z3M Coupe '98 X3 3.0i
    Small front brake inspection, mounted since early 2016, the set has not moved, , no cracks (cracking) pads can still make a lot of trackdays !.







    I mount fasteners for ventilation ducts, steel material a bit heavy that I have lightened 200 grams ,






    I just understood the excessive roll , I lost a screws from the front roll bar !

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  8. #208
    Join Date
    Dec 2016
    Location
    France Clermont Ferrand
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    175
    My Cars
    Z3M Coupe '98 X3 3.0i
    Unibal for the rear antiroll bar




    Second mount for my dif, I used a kit from Garagistic for E30 which doesn't fit for my Z3....









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  9. #209
    Join Date
    Dec 2016
    Location
    France Clermont Ferrand
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    175
    My Cars
    Z3M Coupe '98 X3 3.0i
    It's done







    This tool helped my back when mounting mufflers


    Some job inside
    La dépose du faux plancher carbone a permis de réparer la base de la pédale d’accélérateur qui s'était déboitée. remontage du faux plancher, du repose pied.


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  10. #210
    Join Date
    Dec 2016
    Location
    France Clermont Ferrand
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    175
    My Cars
    Z3M Coupe '98 X3 3.0i
    I sent my work to Garagistic who provide this kit

    https://store.garagistic.com/bmw-per...ary-diff-mount

    " This will not fit E36ti models or Z3 models."

    Here is their answer, I'm a little proud....

    Hello,

    Thank you for the follow up. The install turned out great, nice and clean! We hope that you enjoy the products, please let us know if we can be of assistance in the future.
    We will be sure to forward this information to our R&D team for review. We genuinely appreciate your business and support.
    Facebook's Z3M for trackday use (English and French spoken)

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  11. #211
    Join Date
    Dec 2016
    Location
    France Clermont Ferrand
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    175
    My Cars
    Z3M Coupe '98 X3 3.0i
    Vent for brake

    It must be checked that by turning the wheels in one direction or another, this does not get stuck and is long enough but not too long.

    It's convenient to fix them on the front anti roll bar

    I have to recover a blade (front bumper splitter) in Lyon region, which was mounted on a nissan something
    I'm doing a gauge to see if it's possible to adapt it to my car













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  12. #212
    Join Date
    Dec 2016
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    France Clermont Ferrand
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    175
    My Cars
    Z3M Coupe '98 X3 3.0i
    M Festival Video ! we can see my coupé Z3M !





    https://youtu.be/uiRxXnEnNic
    Facebook's Z3M for trackday use (English and French spoken)

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  13. #213
    Join Date
    Dec 2016
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    France Clermont Ferrand
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    175
    My Cars
    Z3M Coupe '98 X3 3.0i
    Battle vs 2 very nice Caterham 3 owners, weight power ratio is almost the same ! Lurcy Levis french track.

    https://youtu.be/U3tZ2ozFbvI

    https://youtu.be/T0zsF_MTx6c

    Mistake !
    https://youtu.be/z65EHlhsaLs
    Facebook's Z3M for trackday use (English and French spoken)

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  14. #214
    Join Date
    Mar 2005
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    Manhattan, NYC
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    2,947
    My Cars
    S50 ///M Coupe, DSM
    Quote Originally Posted by gatouille View Post
    M Festival Video ! we can see my coupé Z3M !





    https://youtu.be/uiRxXnEnNic
    Cool video!

    Wish there were more shots of your Coupe though.

    (this thread is one of the only ones I actually click on bimmerforums : ) )

  15. #215
    Join Date
    Dec 2016
    Location
    France Clermont Ferrand
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    175
    My Cars
    Z3M Coupe '98 X3 3.0i
    Thanks Sleepy740, here are some pics !















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  16. #216
    Join Date
    Mar 2005
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    S50 ///M Coupe, DSM
    Love it!!!!!

  17. #217
    Join Date
    Jul 2005
    Location
    Temecula Ca.
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    4,489
    My Cars
    99 M Coupe LS Swap
    Looking good. May want to try a bit more rear spring. Be careful first time out. Could get tail happy, but will improve the tire lift.
    Dan "PbFut" Rose

  18. #218
    Join Date
    Dec 2016
    Location
    France Clermont Ferrand
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    175
    My Cars
    Z3M Coupe '98 X3 3.0i
    THank you, next winter some job is already planed for suspensions, new spring and hydraulic settings, first tomorrow I will check the weight on each wheel, these data will help to choose new springs...
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  19. #219
    Join Date
    Dec 2016
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    France Clermont Ferrand
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    Z3M Coupe '98 X3 3.0i
    Same at school, children ! take a pen and write a "Z" on your excercice's book , Gatouille take your Z3M and write a Z on this photo !

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  20. #220
    Join Date
    Sep 2017
    Location
    Northeast
    Posts
    357
    My Cars
    2001 M Roadster
    Great pictures and videos! The whole project/thread is cool. It is nice to see the progress, as well as other posts/threads. There are a lot of very passionate enthusiasts out there. Granted, you seem to be in the field and have some nice contacts, as well as do some/most of your own fabrication and work. I would be curious to know how much time and money did it cost to bring this alwsome orange beast to this level...

    - - - Updated - - -

    Quote Originally Posted by gatouille View Post
    Same at school, children ! take a pen and write a "Z" on your excercice's book , Gatouille take your Z3M and write a Z on this photo !
    Depends which angle you look at it you can find Z and 3 and M in that picture.

  21. #221
    Join Date
    Dec 2016
    Location
    France Clermont Ferrand
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    My Cars
    Z3M Coupe '98 X3 3.0i
    Thank you very much indeed !

    I bought the car 11000 euros (july 2014), and spent 10 000 euros/11000 euros. That's not much but a lot of job helped by my "nice contacts" (my network)
    Next step, friday, I will try to meet french rules and have my car FFSA(French sport automotive association regulated by FIA) approved for races (GT Classic and salooncars)
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  22. #222
    Join Date
    Aug 2004
    Location
    Dexter, MI
    Posts
    1,822
    My Cars
    BMW M235iR / SpecE30
    Looking good! I would also recommend going with more spring rate and less roll bar to improve overall grip. What are your current spring rates?
    -Anthony Magagnoli
    #80 BMW M235i Racing - Pirelli World Challenge TC - 2017 Rookie of the Year
    Rooster Hall Racing / FCP Euro
    '87 BMW SpecE30 #007 - 2012 NASA SpecE30 NATIONAL CHAMPION
    '08 BMW "130i" 6MT, '01 Z3 3.0i Coupe 5MT
    '88 Pontiac Fiero GT 5MT (my childhood dream car!)
    Send Your Teens to Street Survival

    Drive Faster Now

  23. #223
    Join Date
    Dec 2016
    Location
    France Clermont Ferrand
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    175
    My Cars
    Z3M Coupe '98 X3 3.0i
    Thanks for your message ! Spring are the bilstein oem on PSS10 (B16) roll bar from HR Z3M kit on ebay.



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  24. #224
    Join Date
    Dec 2016
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    France Clermont Ferrand
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    My Cars
    Z3M Coupe '98 X3 3.0i
    Today the Gatmobile's D Day ! Gatmobile met the French races rules and it has knaw a (race passport FFSA Approved !) I'm very happy ! The Inspector of the French association of motorsport is writing my " race passport" !






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  25. #225
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    Dec 2016
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    Z3M Coupe '98 X3 3.0i
    Weight on each wheel,









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