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The Showroom
This is the place to show off your BMW to other members of the community. Post pictures and videos of your car and the modifications you have done to it. If you need a picture of something on a coupe, sedan, convertible or touring you will probably find it here!

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Old 07-26-2012, 11:47 PM   #281
Hornung418
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Yay! You've come a long way, Tink. Just about to crest the hill and start the descent
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Old 07-27-2012, 12:20 AM   #282
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It just got better...Mad props!
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Old 07-27-2012, 04:14 PM   #283
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sweetness!!!
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Old 07-28-2012, 03:13 AM   #284
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Originally Posted by Hornung418 View Post
Yay! You've come a long way, Tink. Just about to crest the hill and start the descent
Hopefully that's the case. I think it will really start to feel like more than halfway done once I finish the body repairs and get some primer on her.

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Originally Posted by djnekkon View Post
It just got better...Mad props!
Quote:
Originally Posted by tyusha View Post
sweetness!!!
Thanks guys!
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Old 07-28-2012, 03:43 AM   #285
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More progress from the night. First up was to start work on the trunk repairs. The rear mount for the rotisserie was being supported by the old shock mounts, which are part of the trunk floor, so I had to set her back down on jack stands before I could get to it.





One on the ground I removed the stock bumper retainers. There was a lot of crap and gunk holding them in so I had to persuade them with a few blows of my mallet.





With the bumper retainers out of the way I could start cutting out the old, rusted trunk floor. First were the side braces, which are only found on the late model 2002's (square tail). I won't be adding them back in, but only because I plan to run two diagonal sections of tubing down from the shock towers to the rear corners.





Next under the knife was the passenger side floor, which used to be the mount for the gas tank. Also missing from the picture is the center divider, which looked solid from the top but was completely rusted out on the bottom.





Then the old spair tire well was cut out. I haven't decided if I'm going to replace it with another tire well or just not have a spare in the car. It really depends if I end up centering the fuel cell in the trunk, which would let me move it a bit further inboard, or leave it more off to the side like the stock location.





With the rear trunk floor gone, I started trimming for the e30 rear subframe mock-up. I plan to frame out the trunk with 2"x2" 1/8" wall tubing, with the front most crossbar being in line with the ear mounts of the diff. Because of this I need to get the subframe position figured out before I can finish the trunk and mount the fuel cell.





View from underneath:





Lifting the rear subframe into position:





Hub positioned in the wheel well:





Wheel mounted:





View of the subframe from the front, looking through the engine bay. And yes, the differential input shaft is off-center with respect to the center of the subframe. From this view the centerline is based on the opening in the subframe, which appears dead-nuts on.





Yay extra track width!! It's to bad my wheels don't fit the fenders anymore.....





The band aid in place:





Muuuch better, that being said I will be getting wider wheels/tires. Shooting for at least 15x8 and 225's, but would prefer 245 if I can find the right sidewall.





As far as permanently mounting the subframe, I have two options. One is to modify the e30 subframe to use the stock '02 mounting points. This has the benefit of utilizing the body reinforcements that are already there. I also wouldn't have to fabricate any forward mounts, only the differential ears. The other option is to keep the e30 subframe stock and move the mounting points on the body. This would be nice because it would allow me to bolt up any e30 subframe, if the original one were to get rusty or bent. The downside is I would need to engineer new mounting points and ensure that they are heavily reinforced.

After getting the e30 subframe up there, right now I'm leaning towards the second option. The e30 bushings are roughly 2 inches wider and 1 inch forward of the '02 counterparts. This puts the outer trailing arm mounts right up against the stock subframe mounts on the body. I'm also not convinced that my stock mounting locations are in very good condition. While making new mounting points will be a challenge, it will give me a chance to tie them into the cage structure as well as the unibody. This should give enough integrity to withstand any power levels I throw at it.
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Old 07-28-2012, 11:14 AM   #286
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More progress from this morning. Since I was starting to mock up the e30 rear subframe, I figured I should mount the diff I'm actually planning on using as well as the e36 dual eared diff cover. First up was to inspect my 3.25lsd. It's a rebuilt unit from BMW, denoted by the 'SE' tagged on the side of it. Getting the cover off, it's probably the cleanest diff I've ever gotten my hands on. All the gears are immaculate and not even any discoloration from old oil. I was thinking of replacing the seals before putting it on the road, but now I doubt I'll need to.


The ring gear, lsd pumpkin and speed sensor:





Ring and Pinion:





Next up was to install the e36 diff cover onto the 3.25 lsd. The main issue with this setup is the e30 reluctor ring is larger than the e36 counter part (or at least closer to the diff cover). This causes it to hit the cover and sensor. First you need to relieve the inside of the cover a bit to clear the ring.





With the cover clearanced, next up was making a spacer to move the speed sensor 0.300" out. This would let it get the proper reading from the ring while not interfering with it. So I took some measurements and made a quick sketch:





And of course I was out of 1.5" 6061 round stock, and I wasn't about to turn down my 4" 2024 round stock for a little sensor spacer. Luckily I did have some 1.5" square stock, so I cut off a section to turn down.





Facing the saw cut edge:





The diff cover side finished:





Inner diameter bored and lining up the cutoff tool:





This is how everything lines up. I may need to get a slightly larger o-ring for the spacer-diff cover seal, but overall it fits together pretty snug:





Installed view from the outside. As it sits right now it just bolts down with the stock metal bracket, which bends now that it's spaced up off the cover. I'm going to order some 0.5" round stock 6061 to make two addition small spacers to help support that connection:





Inside view with everything installed. You can see the extra clearance that the sensor has now:





Diff cover and sensor bolted up to the 3.25lsd:






3.25lsd bolted up to the subframe:





And finally the subframe back under the car, ready for mount fabrication:





Thanks for looking!
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Old 07-28-2012, 02:31 PM   #287
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Wow Great work bro
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Old 07-29-2012, 10:25 AM   #288
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Awesome! I vote center mount the gas tank. Without the spare the balance will be off with a full tank methinks.

Sent from my DROIDX using Bimmer App
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Old 07-29-2012, 08:26 PM   #289
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speechless once again...
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Old 07-30-2012, 03:48 PM   #290
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Very impressive.
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sometimes i'm into it and my one hand gets tired, i try switching, but then it's like someone with lou gehrig's trying to peel a carrot.
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Old 08-02-2012, 12:39 AM   #291
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Progress report from the last few days. While waiting on some parts to come in for the rear subframe mounting, I decided to tackle the rear quarter panels. First was to mark off the area that my patch panels would cover:





Then after cutting out the rot I tacked the new panel in place. They aren't perfect as far as overall shape, but since the only option BMW has in the entire rear side panels (for $1k a piece) I can make these work.





Bunch-O-Tack Welds:





Welds ground down, then a small upper section of rust cut out. It extended out past where my patch panel would fit, so I'll have to make up some small patches on my own.





I also took the time to put some paint on the tubing bender. It's by no means a great paint job, but it keeps it from rusting and who doesn't like Hot Rod Red? I also ordered the 1" die set (3" radius) which should come in a week or so. That will let me fab up some smaller reinforcements, like in the front grill area and a strut brace I've been thinking up.





Next up is just some of the parts that have come in this week. First was a set of Tii struts. For those that don't know, the Tii struts have larger wheel bearings compared to the standard '02 pieces, and so they are more durable and desirable. This is especially true when running larger wheels with higher offsets. These will be turned into coilovers either by myself or a suspension supplier depending the route I go.




Lastly is my NEW fuel cell. Basically the more I thought about the one I originally bought, the more I realized the A1000 pump is really overkill for my setup. I also wasn't thrilled with having to run the 5/8" and 1/2" feed and return lines to the front, since I can't handle hard line that size I would have to either bring in a hydraulic shop to bend it for me or use braided hose. The new fuel cell has the '340 Stealth' pump, which is still rated for 5-600 FI horsepower. However, it only needs 3/8" feed and return lines, which I can bend and flare with my own tools. It is also a quiter, more street friendly pump that doesn't need a controller like is recommended with the A1000. The other change with this fuel cell is the 20 gallon capacity up from 15. Considering I want to drive this car, and taking into account the mileage I'm expecting from the turbo M20, the added capacity will be welcome.




Toying around with possible mounting positions in the trunk. Front and Centered:




Leaves decent room for the center exit exhaust to be run:




While minimally hanging below the sheet metal:





Thanks for looking.
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Old 08-02-2012, 06:03 AM   #292
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hats off to you - that is a an a55 ton of work
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Old 08-02-2012, 06:18 PM   #293
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Old 08-02-2012, 06:34 PM   #294
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Unbelievable work.
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Old 08-02-2012, 06:37 PM   #295
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cant wait to see the final product. looks like you're having a lot of fun restoring it.
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Old 08-02-2012, 08:14 PM   #296
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dude..
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Old 08-08-2012, 12:20 AM   #297
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Thanks guys!

The next order of business was to fabricate the new mounts for the rear subframe. After taking some measurements I made a quick sketch of what I needed to turn and got to work.

The Sketch:





Shown in the sketch is the 'bottom plug'. This is what will hold the mounting studs for the two forward mounts on the rear subframe. The bottom plugs will be welded to a piece of 1.5"-0.120 wall DOM tubing, which will then allow me to tie the mounts into the roll cage and unibody very easily. Also, by leaving the top of the tubing open, the studs will be able to be removed/replaced if necessary. This could come in handy if the threads get stripped or rusty over time.


The material I used for the bottom plugs was 416 Stainless, which has good machinability while being very corrosion and wear-resistant. Starting with 1.5" bar stock, a couple hours later I had these:




And here are all the parts of the subframe mount in an exploded view. From left to right: DOM Tubing, Mounting Stud, Bottom Plug, Subframe Bushing, Lower bracing Plate.





This is how the plugs slide into the DOM tubing. The chamfered edge is to help the weld penetrate better, as well as give the filler material somewhere to go.





And here is how the plug fits onto the subframe bushing. The aluminum insert in the bushing fits up into the plug, and when bolted in the aluminum is tight up against the counter bore in the plug.




Everything put together to double check before welding:






Next it was time to press in the mounting studs. For this I used the stock e30 studs pulled from the parts car. The studs themselves have a knurled shoulder right under the head. This is press fit into the plug to hold the stud in place.

The stud loose in the plug, before being pressed in:





After being pressed into the plugs:





After welding the plugs into the tubes:





The two assemblies installed onto the subframe. Here you can also see the jig I made up to help position the subframe under the car:





Finally, with the subframe roughly in position, you can see the DOM tubing sticking up into the cabin area. I'll need to trim the top of the tube down to be even with the floor, I left it extra long since I didn't know how much I would need.




Hoping to get the subframe squared up and welded in place along with the diff mounts tomorrow. Then it's on to the trunk floor!
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Mica - 2000 BMW 323i - The one that started it all
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Old 08-08-2012, 08:57 PM   #298
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I this thread!
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Old 08-08-2012, 11:58 PM   #299
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this is some fantastic work. keep it up
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Old 08-09-2012, 12:06 AM   #300
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