Help! Geometry way off after new parts.

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • WineCountryE30
    Member
    • Aug 2012
    • 53

    #1

    Help! Geometry way off after new parts.

    Hello everyone!

    Something seems very wrong with my new front suspension's geometry. The front wheels are very far forward and are almost rubbing at full lock. Currently the car has 51/2JX14 ET:35 Steel wheels with 195/60/R14 tires. I have a set of staggered 17" 32's [71/2JX17 ET:41 and 81/2JX17 ET:41] that I would like to install along with a 5lug swap, but these 14" wheels are so far forward that there is no way even 15" wheels would fit. The car did fall off the jack stands during an earthquake 6 months ago but other then a punctured rear seat floorboard and trunk it seemed to come out unscathed. I know something is wrong... but what?



    I noticed that the CABS do not stay all the way on the control arms. When I bolt them onto the car they pull back ever so slightly, the ends of the control arms still stick out of the back of the bushing. I do not know if this is normal.



    What I put in: (I did this all at once, so I'm listing everything just in case)

    CAB's - Tree house Racing Lollipops [New] (I know they move the wheels forward, but surely not like this.)

    Control Arms - Lemforder E30 [New]

    ARB Links - Lemforder [New]

    ARB's - BMW E30 Sway Bar 20mm/12mm [OE]

    Springs - BMW E30 M3 [Used]

    Spring Pads - Lemforder E30 [New]

    Sway Bar Bushings - Lemforder [New]

    Shock Mounts -Lemforder [New]

    Struts - E30 [OE]

    Shocks/Strut Inserts - Bilstien HD's [New]

    Steering Rack - E36 328i [Rebuilt]

    Tie Rods - Lemforder [New]

    Rear Shock Tower Reinforcement plates - [New]





    1991 BMW 318i - Parts Gathering for MZ3 5Lug and M62 Swap
    1966 Triumph Spitfire MK2 - 95% Restored
    1976 Jeep CJ5 Renegade Levi's Edition - 40k OG Miles
    1991 GMC 2500 - Factory 454SS
    2008 Honda Pilot
    1957 MGA Coupe - Only the Body and Frame right now
  • Som
    Advanced Member
    • Jan 2014
    • 126

    #2
    When I put the offset Treehouse bushings on my E36 M3 ( '98 ), I had the same drastic change in wheel position with associated light rubbing at lock. Went back to centered bushings and the wheel went back to the normal position.

    Som
    Last edited by Som; 05-04-2015, 04:39 PM.

    Comment

    • E30SPDFRK
      Moderator
      • Jul 2007
      • 5687

      #3
      It's the treehouse bushings, they're designed to be installed on a lowered car.
      Byron
      Leichtbau

      Comment

      • noid
        E30 Mastermind
        • Feb 2008
        • 1529

        #4
        If you want the treehouse CAB's then get their centered ones.
        Your resource to do-it-yourself and interesting bmw and e30 stuff: www.rtsauto.com

        Your resource to tools and tips: www.rtstools.com

        Comment

        • WineCountryE30
          Member
          • Aug 2012
          • 53

          #5
          Thanks Guys!

          I will try putting the old CABs back on and see if that fixes the issue.

          I was under the impression that the eyeballs just switched things to the M3 geometry. I am running M3 springs so I figured it would be ok. I haven't driven it yet, so the suspension hasn't settled... but I cant imagine that it would make a big enough difference. Would the rubber offset bushings pressed into the OE arms cause the same issue?
          1991 BMW 318i - Parts Gathering for MZ3 5Lug and M62 Swap
          1966 Triumph Spitfire MK2 - 95% Restored
          1976 Jeep CJ5 Renegade Levi's Edition - 40k OG Miles
          1991 GMC 2500 - Factory 454SS
          2008 Honda Pilot
          1957 MGA Coupe - Only the Body and Frame right now

          Comment

          • AndrewBird
            The Mad Scientist
            • Oct 2003
            • 11892

            #6
            That is M3 geometry, the wheel is pushed forward to increase caster. I think it is just a lot more obvious because normal E30 fenders are a different shape than the (obviously) flared M3 fenders. The front bumper may also be further forward on the M3.

            Comment

            • Brezzi
              E30 Mastermind
              • Jan 2010
              • 1630

              #7
              Hey guys I have a question about treehouse cabs and figured this would be a good place to ask. My new cars set up is as follows: lowered on all four corners, stock control arms, 16x8 et25 with 225/45/16 Yoko Advan's, 5 mm spacer up front so the tire doesn't rub on the strut tube, and paper thin rolled fenders. I rub a little on full lock. If I install tree house cabs is my rubbing only going to increase? I want to run them but I'm hesitant as I already have some rubbing issues. I think a fresh alignment will help but was looking for some info.

              Thanks in advance!

              Comment

              Working...