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11-14-2020, 06:32 AM | #89 | |
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The e92 M3 has a total rear piston area per caliper of 1661mmx2, whereas the Megane and Clio calipers have a piston area of 2512mmx2, which is 50% larger. |
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11-14-2020, 07:57 AM | #90 | ||
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11-14-2020, 11:47 AM | #91 | |
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C63 AMG (W204) front - 34/36/38mm - 3059mm x 2 per caliper C63 AMG rear - 28/30mm - 1322mm x 2 per caliper The Alfa calipers front and rear are a better bet, as not only are the piston sizes a perfect match for the stock m3 master cylinder, but they are also designed for smaller discs that are closer to the stock thickness and smaller disc diameter. They would also work perfectly with M4 discs. |
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11-14-2020, 12:06 PM | #92 | ||
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11-14-2020, 12:50 PM | #93 | |
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https://www.ebay.co.uk/itm/2018-Alfa....c100012.m1985 https://www.ebay.co.uk/itm/Alfa-Rome...0c4e%7Ciid%3A1 https://www.ebay.co.uk/itm/Big-calip...0c4e%7Ciid%3A1 https://www.ebay.co.uk/itm/2017-ALFA...0c4e%7Ciid%3A1 https://www.ebay.co.uk/itm/ALFA-GIUL...0c4e%7Ciid%3A1 Also worth noting that the Maserati caliper also has the same piston area and is also Radius mount, so that is another option (it's likely to be the same caliper tbh): https://www.ebay.co.uk/itm/Maserati-...8AAOSweoRd3ZIP Last edited by Captain Caveman; 11-14-2020 at 01:01 PM.. |
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11-14-2020, 12:54 PM | #94 | ||
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11-14-2020, 01:08 PM | #95 | |
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https://www.ebay.com/itm/Maserati-Qu...gAAOSwAiVfngzp |
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11-14-2020, 02:19 PM | #96 | ||
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11-17-2020, 11:35 PM | #97 | |
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How much harder is it to make custom bracket for the non-radius mount? GM have good calipers (from ZL1, other Camaros, etc) with non-radius mount, lots of them and doesn't cost much, not sure about the piston size tho. (I remember reading somewhere on this forum that Mustang's caliper piston size isn't a good match)
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11-18-2020, 05:36 AM | #98 | |
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The only way to use these calipers is to have the lugs machined off, and then the caliper drilled to radius mount. Not a simple or cheap undertaking as it requires a precise CAD drawing of the caliper and CNC machining skills. Much simpler and cheaper just to use a caliper that's already radius mount like the Alfa or Maserati one. Practically plug and play in comparison. |
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11-19-2020, 03:54 PM | #99 | ||||
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I was just curious since GM calipers have very steady supply, and Maserati is much easier to find than Alfa but still not readily available like the American ones
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11-20-2020, 01:38 AM | #100 |
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It's doable with the GM caliper, as Slonik has shown previously, but require quite a lot of work/investment. Best bet is to use a radius mount caliper with the right piston area.
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11-20-2020, 05:43 AM | #101 |
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Slonik’s 6 piston machined calipers can be combined with aftermarket 2 piece rotors and I think he offers 360 and 380 mm right options. One advantage of the “staged” BBK is that you don’t have to spend all the money up front. You can use up your stock rotors and then buy 2 piece if you will stay 360mm. I know some think they need 380mm front rotors, but in some cases it is a want rather than a need. The very highly regarded AP kit for these cars apparently works quite well on the track with 355mm fronts.
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11-20-2020, 06:07 AM | #102 |
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Yes, this is definitely an option, but does require the use of calipers that were originally designed for slimmer discs. Using a caliper that was intended for 36mm discs on a 30mm thick disc, for example, could cause issues.
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11-20-2020, 10:03 AM | #103 | |
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Also, how/when can you determine what rotor thickness can you use on caliper that intended to use 36MM thick rotors? Just curious.. Last edited by WNS2N_T; 11-20-2020 at 10:09 AM.. |
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11-20-2020, 10:21 AM | #104 | ||
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11-20-2020, 11:10 AM | #105 |
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30 vs 36mm would be 3mm or 0.12 inches per side. I doubt the piston would become less stable in the bore or pop out and I doubt many run their pads down to the backing plates. I suppose you could shim the pads. Some run titanium shims that would take up 1/3 of that 0.12 inches. I agree with running stuff designed to work together. You can buy rotors in various thicknesses — the Stoptech 380mm rings come in 32mm, 35mm, 38mm and maybe other thicknesses.
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11-20-2020, 11:17 AM | #106 | |||
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Really good info here.. Thank you. Just a few questions, Quote:
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1 caliper OEM is 60mm which is 2826 vs 1 caliper 6 pistons is 32/34/38 at 3 pistons each side is 2845, so 1 caliper is 2845 x 2 which is 5690 per caliper? Just curious. |
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11-20-2020, 11:20 AM | #107 |
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11-20-2020, 12:25 PM | #108 | |
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11-20-2020, 12:44 PM | #109 | |
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Which is 2845 only, not x2 (2845 for the piston and 2845 for the "dummy sliding side"?) |
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11-20-2020, 02:08 PM | #110 |
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If comparing piston areas of stock sliding to aftermarket 6 piston, it’s going to be 2 sides of 1 piston compared to 2 sides of 3 pistons for the areas. Just like Captain Caveman has in his calculations quoted above.
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