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10-16-2020, 07:15 PM | #67 |
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Thanks, the search begins.
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E90 M3 - 6speed - slicktop - single hump
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10-17-2020, 03:53 AM | #68 |
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Wow - that's some serious machining work - top marks!! You should offer those out as a product - there are lots of used M5 calipers available to buy for cheap - I think people would be quite keen on those reprofiled ones. The M5 ones are so heavy - how much weight did you manage to remove?
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10-17-2020, 07:26 AM | #70 |
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10-17-2020, 01:18 PM | #71 |
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I though CF rotors were thicker? 38mm vs 30mm. And they are also larger diameter to add surface area compared to a typical steel counterpart. So you will end up with a really heavy rotor when you convert CF brakes to steel.
Last edited by pbonsalb; 10-17-2020 at 01:29 PM.. |
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10-17-2020, 01:24 PM | #72 | |
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Drives: M3
Join Date: Feb 2012
Location: South Florida/ St. Louis
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Garage List 2016 BMW X5M [0.00]
08 BMW M3 [0.00] 14 BMW X5 50i - sold [0.00] 09 BMW 335i - Sold [0.00] 09 BMW 328i - Sold [0.00] 07 BMW 328i - Sold [0.00] |
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10-17-2020, 02:30 PM | #73 | |
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The height of the discs is down to the fabricator, so you can of course have a narrower friction area and wider bell if necessary - this is completely adjustable. For a particular pad width, there are normally a range of pad heights available to work with a particular caliper. |
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10-17-2020, 03:19 PM | #74 |
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So you would use custom brackets to fit maybe 380mm steel rotors instead of 400mm, and custom hats to center the narrower rotor in the caliper? (I don’t see any need for the weight of 400mm steel rotors on these cars)
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10-17-2020, 03:30 PM | #75 |
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I'm guessing you'd need custom brackets to fit M5 calipers to an M3, but either way, you'd just need to machine the bracket down closer to the hub centre depending on the disc diameter you choose. With a 19" ZCP wheel, you can fit up to a 395mm disc no problem (As proven by Makaveli7 in page 2 of this thread).
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10-22-2020, 09:03 AM | #76 |
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We're looking at retrofit kits with the GT350 OE Brembo 6 pots front calipers.
They are 499 MSRP per pair, and are Brembo branded. No need for refinishing. |
10-22-2020, 09:37 AM | #77 |
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10-22-2020, 10:27 AM | #78 | |
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Link: https://f80.bimmerpost.com/forums/sh...jny4f_fQwOG2WY |
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10-22-2020, 10:57 AM | #79 | |
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I need to keep 18s for track so I'll be sticking to my peasant 380mm rotors.
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10-22-2020, 03:29 PM | #80 | |
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Just swapping the front disc to a 380mm diameter will increase brake torque by 5.5%, add the GT350 Brembo caliper in the mix with a 8% greater piston area, and you will end up with front bias greater than stock. All aftermarket brake suppliers who make a dedicated setup for the E92 (Brembo, Stoptech & AP/Essex Racing) ALWAYS down size the piston area on the front, to allow for the additional brake torque provided by a larger diameter disc, and ensure that pedal bevaiour isn't worsened. As I've posted previously, if you want to maintain front/rear bias and maintain pedal feel and travel similar to stock, you ideally want calipers with equal or smaller piston area that stock, depending on the disc size you will use. The GT350 rear caliper isn't a bad option though, as it has 30/32mm pistons which combined with an M4 370mm rear disc is about perfect for the rear. You have to, however, get around the lug mounts of the GT350 rear caliper, by machining them down to radius mount - I don't think you can get an adapter to fit. Last edited by Captain Caveman; 10-22-2020 at 04:40 PM.. |
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10-23-2020, 07:09 AM | #81 | |
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10-30-2020, 06:52 PM | #82 |
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Refurbished a pair of well used ST60 calipers with paint, pistons and seals. Bought new hats and assembled with new rotors. Installed on my 08 E90M3. This is just for fun; I don’t track the car and don’t expect to stop any faster for the one hard stop I occasionally do. Using Stoptech Sport pads.
May add white Stoptech decals. If I could do it over again, I would have powder coated for a more even paint finish, but the G2 brush on paint I used is supposed to be durable. It looks fine from 5 feet, which is as close as I see my brakes unless I am working on the car |
10-30-2020, 09:03 PM | #83 | |
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10-30-2020, 09:28 PM | #84 | |
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You just need to find a good powder coater that knows what he/she is doing. I did mine and not one issue. Plus they wear much better than paint and look so much better! |
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10-30-2020, 10:05 PM | #85 |
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I would do it myself. My father in law has an Eastwood gun, heat lamp and if necessary, oven. I have silicon stoppers and covers to plug holes and cover threads. I just did not have any high temp powder coat on hand and did not want to wait. Years ago I disassembled a set of Style 5 wheels, stripped and sanded and buffed them, and powder coated them and they turned out great but it was a lot of work. Again, were I doing the calipers over again, I would powdercoat, but I am not going to strip them now.
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11-13-2020, 03:33 PM | #87 | |
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https://www.ebay.co.uk/itm/TOP-ORIG-...wAAOSw-1te26pA https://www.ebay.co.uk/itm/2018-Alfa...AAAOSwlyVePoCP |
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