Alpine e30 progress/build thread

Bassboy3313

m42b32 said:

And most likely, the hope was to make a reusable one but Lowes didn't stock anything with a decent wall thickness

Speedy Metals in New Berlin is your friend!

m42b32

Made more progress:

Struts are assembled! The KBS came out kinda crappy, but I'm not going for a pebble beach level of perfection on the underside. I plan to drive this car as much as possible, so it'll get buried in dirt anyway. One wheel bearing needs to be replaced so I'll be doing both soon.

While I had the driveshaft out, I figured it would be a good time to rebuild the shift linkage and install a short shifter. I didn't want a z3/etc shifter as they tend drop the shift knob into the console further, and shifters that raise the knob height (akg stage 2, bimmerworld race, etc) are $350+, so I decided to make my own DTM style floor mounted shifter. How hard could it be, right?

There really isn't much for information on building your own shift lever on the internet, so I just started measuring things and formulating a plan. I got all my parts in last week and started putting it together over the weekend.

The pivot point is a spherical bearing typically used in off-road suspension, with high misalignment spacers from tie-rod ends. Typically, high misalignment spacers don't fit in plain spherical bearings, but I needed the additional angle capability.

As you can see, the spacers stick out and won't allow the bearing to rotate beyond it's normal limit. As I don't have access to a lathe, I made a jig to chuck the spacer in a drill and then used a bench grinder to trim the excess material off the spacer. The surface finish is rough so I went a little past the edge of the bearing so it wouldn't chew up the bearing liner.

I then welded the parts of the upper and lower halves of the shift lever together (I ground off any zinc plating prior to welding, don't worry). I left the lengths long on each so that I can fine tune the knob height and shift throw once it's all mounted up in the car. I worked on calculating a desired throw and planning the dimensions ahead of time, but ultimately I don't know what I want so I'm just starting at too short of a throw, and too tall of a lever, and trimming each till I'm happy.

I got some bronze bushings and pressed them into the bottom half of the shift lever to mate with the selector rod. The fit is super tight and there is absolutely zero play.

Here is where I'm at, with everything assembled to start test fitting. The actual mounting to the car is still in progress and I am attempting to key off of features already existing in the sheet metal to avoid drilling new holes in case I ever want to return to stock, but what I have so far is a round steel plate with a bearing weld cup in the center. This holds the bearing tightly with a circlip, which is awesome because it has allowed me to design this to be serviceable. The lower half passes through the bearing and threads into the socket on the upper half (loctite so it doesn't come loose on accident), then a nut on the lower half (again, loctite) clamps the whole assembly to the spherical bearing.

I'm hoping to have it finished up by the end of the week. Its a bit heavy, but it should be nice and strong.

While I was under the car, I figured out why my reverse lights weren't working, looks like it snagged the driveshaft at some point.

I also popped in an antenna plug that I got from a guy on r3v (http://www.r3vlimited.com/board/showthread.php?t=371625). Most of the plugs I have seen are plastic and require silicone, this one is a more pliable material and it fits nice and tight so it shouldn't leak. I have all the parts for the z3/318ti mast antenna conversion, but this was cheap and easy and got it done sooner haha.

KaiserRolls

In all serious, I want to see how that turns out!

m42b32

I should mention, the KBS came out kinda crappy because I rushed it and applied it a little too heavy, not because KBS rustseal is crappy.

Jdesign

Now that's creative. Nice work. Care to share where you ordered the materials and part cost?

m42b32

Jdesign said:

Now that's creative. Nice work. Care to share where you ordered the materials and part cost?

Depending on how it works out I can make a diy/write-up on it. I think overall I have less than $80 into the whole thing, with over half of the cost being the bearing and weld cup.

m42b32

Couldn't start testing the shifter setup with the engine hanging free so...

E21 trans mounts with AKG cups installed

Put in the front subframe with a z3 steering rack and Revshift poly motor mounts. I haven't modified the firewall yet so I held off on installing the sway bar for a bit more access. While I was at it: new control arms, condor offset eyeball arms, ground control adjustable sway bar links, and the rebuilt m3 struts with yogurtland springs, bilsteins, and e90 drop hats.

With the engine finally bolted down nice and solid I was able to test the shifter. The initial setup was insanely short, I think it was like a 1" throw from 1st to 2nd. I ended up trimming things down and ended up with a 3" throw from 1st to 2nd and the knob is at a comfortable height. It feels super solid, no flex anywhere and it should be really tight with new washers and rod joint. I tore it apart for paint and I'll get some pics of the final result this week.

On Sunday I turned my attention to the frame rail...and chopped it out

Its a bit hard to see but the internal support for the bumper shock is pretty mangled. Replacing it will require totally dissecting the frame rail so I am going to try renting a slide hammer and massaging it back into shape, hopefully that works and then I can start fitting the new frame rail piece. I ordered a new OEM core support from Umansky and should have it next week.

B C

1" throw[emoji38] wow

Im also running the AKG E21 mounts. Its a good way to go.

Make sure the rubber bumper that rams into the back of the subframe and bolts to the lower flywheel cover is intact while you are in there.

m42b32

Snap said:

Make sure the rubber bumper that rams into the back of the subframe and bolts to the lower flywheel cover is intact while you are in there.

Do m42 cars have one of those? I'll have to look, I can't remember haha

B C

Ah they might not since you have a more generous amount of space for the fan

m42b32

Was at the garage after work, forgot to look for the bumper, next time haha.

Over the last few days I finished the mounting setup, painted everything textured black, and I did the final assembly today.

Shift lever painted and assembled:

This was my solution for mounting the shifter base to the chassis without drilling holes:

There are notches cut to fit on the flange around the edge of the hole the rubber boot usually sits in. Then they bolt to the upper half with the bearing cup via studs, sandwiching the body in-between:

I put an adhesive backed foam gasket around the edge to seal the hole, and secured everything with some stainless lock nuts/washers.

Top view of bearing cup with everything assembled:

While I had everything apart, I replaced the shift shaft seal (what a pain in the ass...), shift rod joint, and the yellow plastic washers.

Final touch: BMW Motorsport golfball shift knob!

Really pleased with how it came out. There is next to zero play and everything is super solid, the shifts are pretty short but don't take too much force to get into gear, and the knob height is really comfortable. I can write up a DIY and post a parts list if people are interested.

YoungCR

What a great looking set up! I'd be interested in making one.

jc43089

Me too, I get the idea from the pictures, where did you buy the bearing, and now that you see the travel amount would you have still needed to do the grinding you did?

m42b32

Sure! I'll make a separate thread with all the info so it doesn't get lost in this one. I took a video when it was finished that I can post too

Jdesign

That turned out great!!!!! Awesome work, I really liked that you worked around not modifying the chassis.

m42b32

Finally finished rebuilding my M3 brake calipers:

Painted the calipers and carriers with gloss black caliper paint and along with a re-seal kit I used new pistons, guide pin bushings, bleed screws and anti-rattle clips for all 4 corners.

Next up: rear axles

jc43089

Looks great! I need to rebuild the calipers on my Volvo with new seals before I have one get seized, they are 400$ each, scary. They are 4 piston Brembos.

straight6pwr

can you enlighten me on m3 calipers? are you going 5-lug?

m42b32

straight6pwr said:

can you enlighten me on m3 calipers? are you going 5-lug?

Yup! I am in the middle of an e30 M3 5-lug conversion so I'll be running the stock M3 brakes all around as it is required by the swap. I'm also changing to an e32 750il brake master cylinder (slightly larger bore than the OEM M3, but with the correct threads for non-m e30 brake line fittings) to compensate for the bigger calipers.

straight6pwr

nice! i'm a bit dense - the weds you posted were 5-lug and I didn't put 2 and 2 together.

WIBIMMERS

Alpine e30 progress/build thread