E30-323ti 66 Report post Posted September 5, 2003 Picked up my 25mm E32 750iL master cylinder this afternoon. Installing over the weekend. I'll post some pics on monday. Have a good weekend all. Quote Share this post Link to post Share on other sites
Guest Andrew Report post Posted September 5, 2003 What brake setup are you running? Quote Share this post Link to post Share on other sites
E30-323ti 66 Report post Posted September 7, 2003 Custom. Quote Share this post Link to post Share on other sites
E30-323ti 66 Report post Posted September 8, 2003 Shinny new 25mm master cylinder. Quote Share this post Link to post Share on other sites
E30-323ti 66 Report post Posted September 8, 2003 Undo nuts that hold Master Cylinder to the brake booster and loosen the brake nuts. Quote Share this post Link to post Share on other sites
E30-323ti 66 Report post Posted September 8, 2003 Disconnect brake lines and remove master cylinder. New master cylinder being test fitted. Like a glove. Quote Share this post Link to post Share on other sites
E30-323ti 66 Report post Posted September 8, 2003 Remove the fuild reservior from the old MC, by pulling it out. Quote Share this post Link to post Share on other sites
E30-323ti 66 Report post Posted September 8, 2003 Next, put the reservior onto the new MC by pushing it in. Don't forget to transfer the rubber seal from the back of the old MC to the new MC (or buy a new one if needed). Quote Share this post Link to post Share on other sites
E30-323ti 66 Report post Posted September 8, 2003 You also need a tee piece and small length of solid brake line if your E30 doesn't have ABS, as the E32 MC has only 1 outlet for the front brakes but the stock MC has 2. Quote Share this post Link to post Share on other sites
E30-323ti 66 Report post Posted September 8, 2003 Install the new MC with the reservior attached. You will need to bend the piece of solid line you bought and create a loop from the MC outlet to the tee piece, I put the tee under the end of the MC and bent the pipe to suit. Quote Share this post Link to post Share on other sites
E30-323ti 66 Report post Posted September 8, 2003 Now last of all, connect up all the brake lines to the MC. Fill with brake fluid and bleed the brakes as per normal, it may take a while as the MC is empty, you can bench bleed the MC by filling the reservior with fluid and pumping it a few times before you install it, be careful because it is very easy to get brake fluid everywhere and it loves to strip paint. Finally, you may need to adjust the brake push rod behind the glove box if the pedal has too much free play, I didn't need to. Quote Share this post Link to post Share on other sites
Guest Andrew Report post Posted September 8, 2003 very nice. How much did that set up back.. AND whats your braking like now? Quote Share this post Link to post Share on other sites
E30-323ti 66 Report post Posted September 9, 2003 For the discs, pads machining work was about $700. The master was $380 not from BMW (they wanted over $800). Well all you E30 owners you know what it was like before, all I can say is the new brakes make it feel like the stock ones are made of wood!! Quote Share this post Link to post Share on other sites
Guest Andrew Report post Posted September 9, 2003 on the must do list... I wonder if that 7 series master cylinder will make a diff with the stock brake setup? Quote Share this post Link to post Share on other sites
E30-323ti 66 Report post Posted September 9, 2003 I think it would make the pedal too firm on a stock setup. The stock MC is only 20.64mm on the E30, compared to the 25.4mm of the E32, that is 1.5x the cross sectional area thus 1.5x the effort required. My brakes will be for sale in the new year to make way for phase 2 of the conversion, so keep that in mind (you just need the E32 MC and +16" wheels) Quote Share this post Link to post Share on other sites
Guest Andrew Report post Posted September 9, 2003 I think it would make the pedal too firm on a stock setup. The stock MC is only 20.64mm on the E30, compared to the 25.4mm of the E32, that is 1.5x the cross sectional area thus 1.5x the effort required. My brakes will be for sale in the new year to make way for phase 2 of the conversion, so keep that in mind (you just need the E32 MC and +16" wheels) I'm not sure if I will upgrade brakes. I have a feeling the new motor plans are gonna be more than 20% power increase.From looking around the e36/5 looks the best option for a brake upgrade option. Quote Share this post Link to post Share on other sites
E30-323ti 66 Report post Posted September 9, 2003 Except they have solid discs on the front!! I would sell everything so it would be a complete bolt on upgrade. Shocks, struts, springs, hubs, brakes & wheels. Basically unbolt it from the control arm and strut tower and send the whole corner. food for thought anyway. Quote Share this post Link to post Share on other sites
