» Site Navigation | | » Recent Threads | | | | | | | 10-13-2006, 02:55 PM | #1 | Senior Member Join Date: Oct 2006 Location: Europe Posts: 224 | Vented rear disk on an e36 compact? 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 Last edited by e36 323ti; 08-14-2011 at 01:18 PM. Reason: Added link to my final solution! | | | 10-13-2006, 04:00 PM | #2 | Senior Member Join Date: Sep 2004 Location: Manassas, VA Posts: 4,129 | Interesting idea, what needs to be changed, besides the rotors? Quote: Originally Posted by e36 323ti Is there anyone who has done a convertion from solid to vented rear disks on their ti's? | __________________ 1998 (July) 318ti, 5-spd OEM Armrest Blaupunkt Heidelberg CD50 CD Player/Compact Drive MP3 Player Diamond Audio 5.25" rear speakers Navman ICN 530 GPS BMWALARM.COM (with comfort settings) after market alarm system Magnecor 8.5mm wires M-Z3 Shifter/Momo Knob Burlwood Dashboard Stromung Exhaust X-brace Racing Dynamics Front Strut Bar Carbonio C.A.I. 17" Rial Rims Vader Seats/Heated/Lumbar Support M-tech Steering Wheel/Front Sway Bar/Front & Rear Bumper Depos/w 6500K Angel Eyes/6000K HIDs Clear Corners M3 Mirrors UUC Light Weight Flywheel/M5 Clutch/M3 Clutch Slave E28 3.46 LSD/Mcoupe Cover/E30 Flanges & Halfshafts UUC S.S. Brake/Clutch Lines Hartge Roof Spoiler BavAuto Springs Bilstein Sport Struts/Shocks E46 M3 Rear Shock Mounts SPC Front Camber Kit Reiger Hatch Spoiler BavAuto Rear Camber Kit Dinan Stage II Software Turner Rear Sway Bar Reinforcements BMW E46 Auto dimming mirror with Clown Nose alarm Engine Compartment Light Heated Wiper Fluid Retrofit OEM Fire Extinguisher Da'lan Trailer Hitch Rear Sun Shade OEM Fog Light Retrofit H & R MZ3 Rear Sway Bar/ UUC Adjustable End Links Cruise Control Retrofit On Board Computer Retrofit M3 twistie style side skirts Carbon Fiber Hood | | | 10-13-2006, 04:09 PM | #3 | Senior Member Join Date: Aug 2006 Location: maritimes Posts: 1,433 | 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... __________________ 11/97 Base 328Ti | | | 10-13-2006, 04:19 PM | #4 | Senior Member Join Date: Sep 2004 Location: Manassas, VA Posts: 4,129 | 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. Quote: 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... | __________________ 1998 (July) 318ti, 5-spd OEM Armrest Blaupunkt Heidelberg CD50 CD Player/Compact Drive MP3 Player Diamond Audio 5.25" rear speakers Navman ICN 530 GPS BMWALARM.COM (with comfort settings) after market alarm system Magnecor 8.5mm wires M-Z3 Shifter/Momo Knob Burlwood Dashboard Stromung Exhaust X-brace Racing Dynamics Front Strut Bar Carbonio C.A.I. 17" Rial Rims Vader Seats/Heated/Lumbar Support M-tech Steering Wheel/Front Sway Bar/Front & Rear Bumper Depos/w 6500K Angel Eyes/6000K HIDs Clear Corners M3 Mirrors UUC Light Weight Flywheel/M5 Clutch/M3 Clutch Slave E28 3.46 LSD/Mcoupe Cover/E30 Flanges & Halfshafts UUC S.S. Brake/Clutch Lines Hartge Roof Spoiler BavAuto Springs Bilstein Sport Struts/Shocks E46 M3 Rear Shock Mounts SPC Front Camber Kit Reiger Hatch Spoiler BavAuto Rear Camber Kit Dinan Stage II Software Turner Rear Sway Bar Reinforcements BMW E46 Auto dimming mirror with Clown Nose alarm Engine Compartment Light Heated Wiper Fluid Retrofit OEM Fire Extinguisher Da'lan Trailer Hitch Rear Sun Shade OEM Fog Light Retrofit H & R MZ3 Rear Sway Bar/ UUC Adjustable End Links Cruise Control Retrofit On Board Computer Retrofit M3 twistie style side skirts Carbon Fiber Hood | | | 10-13-2006, 04:50 PM | #5 | Senior Member Join Date: Aug 2006 Location: maritimes Posts: 1,433 | nope, your absolutely right.. i don't know why i thought i had vented rears __________________ 11/97 Base 328Ti | | | 10-13-2006, 05:20 PM | #6 | Senior Member Join Date: Aug 2005 Location: Florida Posts: 2,525 | 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. | | | 10-13-2006, 07:09 PM | #7 | Senior Member Join Date: Mar 2005 Location: Portland Or Posts: 2,666 | 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 __________________ Dave - PDX 1995 318ti - Active Black and Tan. 2005 330xi - Mtech 1 - 6spd - Orient Blue/Black | | | 10-13-2006, 07:18 PM | #8 | Senior Member Join Date: Jun 2003 Location: Halethorpe, MD Posts: 1,028 | 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. | | | 10-13-2006, 07:42 PM | #9 | Senior Member Join Date: Oct 2006 Location: Europe Posts: 224 | Quote: 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 | | | 10-13-2006, 07:49 PM | #10 | Senior Member Join Date: Mar 2005 Location: Portland Or Posts: 2,666 | 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... __________________ Dave - PDX 1995 318ti - Active Black and Tan. 2005 330xi - Mtech 1 - 6spd - Orient Blue/Black | | | 10-13-2006, 08:03 PM | #11 | Senior Member Join Date: Aug 2005 Location: Florida Posts: 2,525 | 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. | | | 10-13-2006, 08:04 PM | #12 | Senior Member Join Date: Oct 2006 Location: Europe Posts: 224 | Quote: Originally Posted by 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... | To my knowledge there is no proportioning valve on my 323ti (I could not find it in the 'ETK') .. and yes, it is beacuse of track use I am looking for more stopping power (or more correctly ways to handle the temperature). The rear pads (Ferodo DS2500) got fried on my last track day event, and delaminated. Also my front pads (DS2500) went away. My calculations show that my 323ti has a stock bias setup by 72.6% (static). By going for the AP's with stock rear the bias goes up to 77%, which I think is too much. With AP up front and the proposed vented disks rear, my calculations reads 72.3% (very close to stock bias). My 'ti: http://home.online.no/~krimp/sweb/photo_e36_323ti.htm | | | 10-13-2006, 08:15 PM | #13 | Senior Member Join Date: Oct 2006 Location: Europe Posts: 224 | Quote: 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. | | | 10-13-2006, 08:39 PM | #14 | Senior Member Join Date: Jun 2003 Location: Halethorpe, MD Posts: 1,028 | I didn't realize you were in Europe. I was looking at the diagrams for the US models. Maybe you guys got vented rears and we didn't? For the record, I checked a 1998 323i and 1998 M roadster. If the rears on the M roadster are vented, there's info somewhere else on here about swapping the rear suspension from those onto the ti. Good luck. | | | 10-13-2006, 09:24 PM | #15 | Senior Member Join Date: Mar 2005 Location: Portland Or Posts: 2,666 | Quote: Originally Posted by e36 323ti To my knowledge there is no proportioning valve on my 323ti (I could not find it in the 'ETK') .. and yes, it is beacuse of track use I am looking for more stopping power (or more correctly ways to handle the temperature). The rear pads (Ferodo DS2500) got fried on my last track day event, and delaminated. Also my front pads (DS2500) went away. My calculations show that my 323ti has a stock bias setup by 72.6% (static). By going for the AP's with stock rear the bias goes up to 77%, which I think is too much. With AP up front and the proposed vented disks rear, my calculations reads 72.3% (very close to stock bias). My 'ti: http://home.online.no/~krimp/sweb/photo_e36_323ti.htm | I believe its integrated into the ABS pump housing. But I work on enough different marques that I could have it crossed up.... Still like to hear how your works, its good to get real data from trying things whether they work or not... And if it didn't work its cool to figure out what happened Dave __________________ Dave - PDX 1995 318ti - Active Black and Tan. 2005 330xi - Mtech 1 - 6spd - Orient Blue/Black | | | | | Currently Active Users Viewing This Thread: 1 (0 members and 1 guests) | | Posting Rules | You may not post new threads You may not post replies You may not post attachments You may not edit your posts HTML code is Off | | | |