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My Forever Car: '89 325i Touring

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    #91
    Originally posted by Northern View Post
    I would say cut the valence behind the bumper where you can't tell, but I think you'll hit the front of the wheelwell shortly after. I didn't interfere with the valence, but did hit the wheelwell... Maybe centered CABs could be an option?
    The centered CABs are definitely going on when I go to fit the 255s. The wheels are visibly sitting forward in the wheel well. Losing caster will be a bummer but having all the caster in the world is irrelevant if I can't drive it hard for fear of tire rub.

    Once I get some centered CABs (that aren't blown out like my original stock ones) I'll experiment with seeing how much needs to be removed for proper fitment. The front fender liner had to be removed in order to get full steering but I'm going to try to make the main liner work (dirt road problems). Did your tires rub the metal structure that the liner bolts to?
    -----I drink and I know car things-----
    1989 325i Touring - Daily W.I.P.
    ->https://www.r3vlimited.com/board/sho...d.php?t=398457

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      #92
      You can always get more caster from the top as well if you need it. I wouldn't worry about losing the offset CABs too much.

      Mine hit the front of the wheelwell where you mention. I gave it a whack with a hammer where the outboard liner screw is for maybe an extra 5mm of clearance. For reference, this was with 225/45R16's on a 16x8 et8, so your interference might be worse
      Originally posted by priapism
      My girl don't know shit, but she bakes a mean cupcake.
      Originally posted by shameson
      Usually it's best not to know how much money you have into your e30

      Comment


        #93
        Originally posted by Northern View Post
        Mine hit the front of the wheelwell where you mention. I gave it a whack with a hammer where the outboard liner screw is for maybe an extra 5mm of clearance. For reference, this was with 225/45R16's on a 16x8 et8, so your interference might be worse
        Interesting, is that static or dynamic? With my 225/45R17s at et20 I clear that portion, but I haven't pushed the car yet.

        Speaking of which, I finally test drove the car sans flares. I had a very noticeable ticking-grinding noise coming from the left front during low-mid cornering which I figured might be the ARB rubbing on something. Turns out I was right about the control-arm-to-rotor clearance:




        That'll buff out, right?

        A slight grind and a lick of POR-15 and all was well with the front suspension. I got under the car and checked all the connections and components and all seems good.

        The brakes, however, are still very soft but do generate pressure at the bottom of the pedal travel. This is despite seeing consistent clean fluid at all four corners. This could be one of two things. One: air in the system still. When I rebuilt the calipers on my Spec Miata it took four session->bleed cycles before all the air was out, and considering I replaced every line it's very likely that there's still air trapped. Two: the big-ass calipers require more fluid and therefore require a larger master cylinder. I haven't seen this mentioned in any of the Naseig/Elcoy kit threads, but it's possible I missed something. To anyone running this kit: is a 25mm MC needed to restore proper pedal travel?

        The last thing left to properly install is the Kamotors flares. I initially hit them with SEM Trim Black when I was thrashing to finish the car for a work sponsored car show (which I didn't make), but I always intended on color-matching them.

        I wet sanded the flares down, cleaned them, then hit them with SEM high-build primer. Which, of course, promptly reacted with the underlying layers, causing huge cracks in the finish. In a cumulative moment of frustration about this project fighting me every step of the way, I forgot to take a picture. However once it dried I rallied, stripped down the reacted bits, and got back to work.


        Stripped, cleaned, ready for primer. Again. I used Dupli-Color Filler primer this time around and had no issues.


        Primed, wet sanded with 320, cleaned, and a fresh base coat of PPG Lachsilber.


        Third and final coat of SEM 1K Clear.


        I had my local Painters Supply mix up the Lachsilber and put it into a spray can for me. Unfortunately the can started to give up on the final coat on the last flare, which made the metallic a bit uneven. If it looks as bad in the sun as I expect it will I'll have have to suck it up and buy a real gun.

        Once the clear coat cures the flares go on and she'll finally be ready for the road again. I can't wait.
        -----I drink and I know car things-----
        1989 325i Touring - Daily W.I.P.
        ->https://www.r3vlimited.com/board/sho...d.php?t=398457

        Comment


          #94
          Originally posted by -J- View Post

          Interesting, is that static or dynamic? With my 225/45R17s at et20 I clear that portion, but I haven't pushed the car yet.
          I noticed when I was driving around, right after I added a 12mm spacer to bring the wheel to ET8. It cleared fine at ET20 but was noticeably further into the wheelwell than the rear. Maybe the offset does more harm than diameter
          Originally posted by priapism
          My girl don't know shit, but she bakes a mean cupcake.
          Originally posted by shameson
          Usually it's best not to know how much money you have into your e30

          Comment


            #95
            Why 255s? 245ís fit 17x9 better IMO.

            Thought about going that route?
            Zach@Zakspeed.us

            Comment


              #96
              Originally posted by moatilliatta View Post
              Why 255s? 245ís fit 17x9 better IMO.

              Thought about going that route?
              I did. Here's the thought process: I'm trying to fit as much tire as possible in order to balance the chassis to the impending S54 swap. Most performance FR cars run stagger, including the M3's from E36 and up. I believe this is done to help balance corner exit traction, but I've never talked at length to a chassis engineer about stagger, so your guess is as good as mine. Using Tire Rack's tread width measurement, the average stagger for M3's is about 1.2in across the E36-E92 range. It's important to look at the Tire Rack measurement and not the notoriously unreliable DOT width rating for the reasons outlined here: https://motoiq.com/how-to-properly-select-and-size-tires-for-performance/2/. Since the Touring has more ass weight that the M cars, it should need less stagger, so I made a scientific wild-ass guess and shot for 0.8in. I know I can fit a 9.5in tire in the rear, so now I just needed to match the fronts to that. In the Continental sizing, the 255 measures to a 8.8in, resulting in a 0.8in stagger. Perfect.

              That said, the Conti 245/40 measures to 8.6in, which is very close, and has a 0.3in smaller diameter. The smaller diameter would only help fitment, and the chassis could be balanced out with bar and ride height tuning if necessary. If the 255's refuse to fit this could be an option.
              -----I drink and I know car things-----
              1989 325i Touring - Daily W.I.P.
              ->https://www.r3vlimited.com/board/sho...d.php?t=398457

              Comment


                #97
                Most track orentated E36, E46, E90 runs square setup.

                Most Rear / Mid engine Rear wheel drive cars are staggered.
                Last edited by moatilliatta; 09-17-2019, 11:22 AM.
                Zach@Zakspeed.us

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                  #98
                  Originally posted by moatilliatta View Post
                  Most track orentated E36, E46, E90 runs square setup.

                  Most Rear / Mid engine Rear wheel drive cars are staggered.
                  Interesting. Even the track-focused M cars run square?
                  -----I drink and I know car things-----
                  1989 325i Touring - Daily W.I.P.
                  ->https://www.r3vlimited.com/board/sho...d.php?t=398457

                  Comment


                    #99
                    Originally posted by -J- View Post

                    Interesting. Even the track-focused M cars run square?
                    At the shop, the track / Race cars run:
                    E36M 245/40R17 9 Wide
                    E46M 275/35r18 or 285/645r18 slicks 10 Wide

                    You can go wider, but rubbing becomes the battle under stock fenders.

                    Zach
                    Zach@Zakspeed.us

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