5-lug Setup

[dthree]

I wasn't sure what the offset of the e30 M3 rear hub was between the bearing and the hub face so I didn't go that road. I know it can be pressed into the standard late e30 trailing arms. I didn't want to buy the e30 M3 hub if it didn't bring the wheel mounting face toward the center of the car. I assumed the e30 M3 hub moved the wheel mounting face further out because it has wider fenders. I am doing this to run et20 wheels. By using the standard e36 rear hub, the spacer I made, and rotor, the wheel mounting face will be the exact same width as it was when it was 4 lug. I am going to assemble it tonight. Any specs on e30 M3 rear hubs and rotors would be greatly appreciated. Maybe that is the better rout of doing what I am trying to do. It all depends on the offset on the hub. I suppose if someone could measure the offset of a rear rotor from a standard e36 and a e30 M3 that would give me the answer.

[fporro]

^ as far as i know, e30 m3 rear hubs are a direct fit onto other e30 trailing arms.

Is there a brake mount difference that stops you from doing that?

[dthree]

Here is the hub spacer that I made. I just have to turn a ring to press into it that will locate the rotor and wheel. I should have the car back on the ground this weekend. I should be able to fit the 15x8 wheels with et20 offset and 225/50/15 RA1s without a problem.

I don't know how this compares to the e30 M3 hub placement, but I had these e36 parts, so I went for it. I just wanted to show another option out there.

[dthree]

I have been running the 318ti rear trailing arms for the last 5 years on the car and want to make this change to give me more wheel options and capability for wider tires. That is why I want to do this. Z3 hubs in the e30 trailing arms would be a little bit wider than my current set up. I have everything designed. I am going to try to machine everything this afternoon. We will see how it goes.

[IronFreak]

Roll your fenders, problem solved. the z3 I think pushes the rear like 7mm.....your going to be in the same neighborhood if you space out the rotor......

Whatever you do you have to alter the mounting face of the wheel....so spending the money on the right part or try and make your idea work, you're still pushing the mounting surface out. Unless you use a deeper et or crazy stretched tires your probably not going to run et20.

[dthree]

Just by z3 hubs, you can get them new from Pelican for $75 bucks.

If I use the Z3 hub, I will not be able to run et20 wheels. I want to run et20 wheels because there are a lot more options in that offset at 15" diameter.

I think I am going to make some spacers and see if I can make it work. If I absolutely have to remove the parking brake I will. This is for a track car.

[IronFreak]

Just by z3 hubs, you can get them new from Pelican for $75 bucks.

[dthree]

Has anyone put the standard e36 rear hub and rotor on the e30 trailing arm. I am aware that a spacer is needed to move the rotor out to the correct location for the caliper and parking brake. I have access to a CNC mill, so I could make a spacer pretty quickly if it would work, but I didn't see if anyone has run into a roadblock here. I have seen it brought up, but not sure if anyone followed through.

[BenM]

See post #33 & 38 in this thread - http://www.318ti.org/forum/showthrea...t=35983&page=3

This was the setup I was going to run on my track car, but I picked up Z3 M stuff instead.

[Aptyp]

working on adapting e36m3 brakes in the back, but I'll be giving up the parking brake

[gtarwiz]

So by looking at what yellowltd posted, using e36 328i vert rear calipers could really help with the brake bias issue because they are almost the same size as the standard e36 M3 rears. Or using the e46 non M rear calipers which appear to be the same size as the e36 M.

And does anybody know if the E46 calipers fit the e36 318ti brake carrier? Or does the e46 carrier fit on a e30 TA?

[Aptyp]

great research, I'll measure somethings and add some info when I can.

[yellowltd]

Hai Guise!

First of all, awesome thread. I am very happy to have found this information in one place, big props to Aptyp for his website.

In reading, I started to wonder about how this mishmash of brake parts affects the car. I was happy to see someone finally bring up the issue around page 16, but I haven't seen the answers that I wanted. In fact, I've seen precious little information about the brake systems on these cars, so I've gone hunting. I've gathered what I've been able to find into a Google spreadsheet, made this spreadsheet public, and anyone with the link can add information. If anyone knows of a repository of information that would be useful (or supersede my own) please point me in that direction!

Please, please only add information that you are able to verify with a second source, or through empirical measurement. Please do not remove information that is already there unless you have proof that it is in error. And, when using the data from the spreadsheet, please keep in mind that this is the internet, and this information is worth exactly what you paid for it. The job of staying alive is yours and yours alone. Enjoy, and please contribute what you can!

https://docs.google.com/spreadsheet/ccc?key=0AvbyHbVkuyAjdDFiMlpCbFZvSFZuTkhJU295UjZxVkE

[Aptyp]

I ran e30 ground controls, bavautos, eibachs, H&R Races, Racing Dynamics and now ground controls again. Always ran e30 springs.

[openthrottle]

So what about suspension? I think this also has to be discussed.

When you go an e36m front and 318 rear. What coilovers would you use? Would you actually go to e36 setup or do you have to go to a custom type setup? Might seem a bit of a dumb question but its better to be clear.

I know the bottom mount points are different for the struts/coilovers on the e36 (at least for the front) but what about the upper mount? Should a person use e30 upper mounts or e36?

Thanks for all the help everyone. This thread has been really informative.