Vented rear disk on an e36 compact?

[e36 323ti]

Is there anyone who has done a conversion from solid to vented rear disks on their ti's?

Direct link to my final solution:http://www.318ti.org/forum/showpost....&postcount=247

[L84THSKY]

Interesting idea, what needs to be changed, besides the rotors?

Originally Posted by e36 323ti

Is there anyone who has done a convertion from solid to vented rear disks on their ti's?

[Philly]

i have vented on my rears and solid on the front... did previous years come with all solids???

i know for a front solid to vented, you need to change the calipers, get pads for those calipers and stronger brake lines(i think) and then it should all work...

[L84THSKY]

Are you sure about having vented rear brakes? I have a 1998 with vented front brakes, but never heard of stock vented rear brakes. The rear rotor is actually a hub rotor in one. The hydraulic brake uses the rotor portion, the parking brake uses shoes in the hub.

Originally Posted by rwd_king

i have vented on my rears and solid on the front... did previous years come with all solids???

i know for a front solid to vented, you need to change the calipers, get pads for those calipers and stronger brake lines(i think) and then it should all work...

[Philly]

nope, your absolutely right..
i don't know why i thought i had vented rears

[mohaughn]

I think you have to get the complete subframe from a z3 to upgrade the rear brakes without going aftermarket. There are other threads around from people who have done it.

[e36 323ti]

Originally Posted by mohaughn

I think you have to get the complete subframe from a z3 to upgrade the rear brakes without going aftermarket. There are other threads around from people who have done it.

I have search alot, but has not succeed in finding anything.

What I plan to do is to use vented disks from the e36 328i/323i (276x19mm), callippers from the e36 328i drop-top (because it has 38mm pistons). The reason why is that I plan to use AP-Racing 4-pot callipers with 330mm disks up front. To maintain near stock like brake-bias the stuff from the drop-top is required (at least according to my calculations).

Please excuse my bad english

[pdxmotorhead]

Based on temperature and wear I don'think vented rears will buy much. I work on a lot of race cars and vented rear brakes are uncommon until your either over 155mph or your car weighs over 3500 lbs.

Spec miata for example uses Hawk BLue pads front and Hawk Blacks in the rear because the blue don't get hot enough to work in the back.

Dave

[bullmand]

Just doing a quick check of parts diagrams at realoem.com shows that all the E36 models have non-vented rear rotors. Even the M cars. You could probably find a custom set-up on the aftermarket, but I really don't think it's worth that kind of money. See the reasons given in the previous posts.

[e36 323ti]

Originally Posted by bullmand

Just doing a quick check of parts diagrams at realoem.com shows that all the E36 models have non-vented rear rotors. Even the M cars. You could probably find a custom set-up on the aftermarket, but I really don't think it's worth that kind of money. See the reasons given in the previous posts.

That's dependent on year of make. There was a change in 1996(?) when they went from 280x10mm solid to 276x19mm vented.

[bullmand]

Originally Posted by bullmand

Just doing a quick check of parts diagrams at realoem.com shows that all the E36 models have non-vented rear rotors. Even the M cars.

OK. I just took off my asshat and checked the diagrams again. I was just looking at the pretty pictures and not the part descriptions. The rear rotors on the rear of the M3 and the M Roadster/Coupe do show vented rear rotors. Sorry about that. I'll do my research more carefully next time. I second the suggestion of curing your problems with better pads. Again, good luck and keep us posted.

[e36 323ti]

Originally Posted by bullmand

.... keep us posted.

I have done some measurements. The 276x19mm disks fit on the 323ti drive flange hub. Also the parking brake have the same diameter. Some adapters are required, since the brake shield and caliper has to be moved 17mm outwards. Also there is different diameter on the brake carriers, so an adapter need to be build.

I guess the amount of work required is like fitting e36 m3 rear brakes on an e30, except I do not need to rebuild the parking brake due to equal diameter on the 323ti and the other e36s .

Here are some links to a guy which have fitted e36 m3 rear brakes on an e30 (he also fitted e36 m3 front brakes).

The adapters: http://www.bmwccn.no/nor/kapittel3/f...aspx?Id=314886

The rebuild: http://www.bmwccn.no/nor/kapittel3/f...aspx?Id=330089

[pdxmotorhead]

Your calculations may be off, the proportioning valve on the stock system reduces rear braking substantially. I think I read 80%. Of course,, for track use,, you may need the extra cooling, be sure and let us know the result...

[mohaughn]

http://www.318ti.org/forum/showthread.php?t=9129

I have the 325mm BMW floating motorsport rotors from the e46-M up front with wilwood forged superlite calipers. On the rear I am running hawk hps street pads. I have no problems with brake bias. I've used the car at two track day events and several auto-x events. At Sebring I had one of the instructors drive the car and he even commented that he thought the braking abilities of the car were excellent. That is with the stock rear calipers and rotors.

UUC has their stage 3 brake kit, I have the stage 2, that includes front and rear wilwood calipers and the appropriate hangers and rotors. Althogh, if you are just going with a 330mm front brake kit the rears should be fine with a better brake pad.

[johnnya]

Originally Posted by mohaughn

http://www.318ti.org/forum/showthread.php?t=9129

UUC has their stage 3 brake kit, I have the stage 2, that includes front and rear wilwood calipers and the appropriate hangers and rotors. Althogh, if you are just going with a 330mm front brake kit the rears should be fine with a better brake pad.

Rob Levinson from UUC told me that rear brake caliper will not fit on the ti. What did you had to change to make it work ? MZ3/M Coupe hub and short shaft ???