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#1
03-12-2007, 02:17 AM
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Possible brake upgrade: 300D to 300SD
I've read that the 300SD brakes are vented. The 300D's are not.
The change involves replacing the calibers, rotors, and maybe pads. Would this upgrade give a significant increase in stopping time? Any negatives?
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JWJ 1983 MB 300D - > 430,000 miles - Deep Blue - Bilstein Comforts - 0-60 in 24 seconds - 27MPG 1985 MB 300TD (wagon) - > 275,000 miles - Manila Beige - Thule rack - 0-60 in 18 seconds - 22 - 25MPG Biodiesel, Mobil Delvac 1, and Viton fuel lines! 
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#2
03-12-2007, 02:19 AM
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Calipers, rotors, and backplates.
Better high speed stopping and longer pad life.
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#3
03-12-2007, 03:51 AM
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So are only the SD's front brakes vented?
I do not see it as an option for the rear brakes. If this is the case is there any benefit to upgrading the rears to the SD standard?
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JWJ 1983 MB 300D - > 430,000 miles - Deep Blue - Bilstein Comforts - 0-60 in 24 seconds - 27MPG 1985 MB 300TD (wagon) - > 275,000 miles - Manila Beige - Thule rack - 0-60 in 18 seconds - 22 - 25MPG Biodiesel, Mobil Delvac 1, and Viton fuel lines!
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#4
03-12-2007, 06:27 PM
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first off, if they were better, they would REDUCE your stopping time... actually, reduction of stopping distance is the general benchmark...
second the SD brakes will not help that at all, same calipers with a spacer to make up for the vented rotor. they will give you better sustained braking due to better cooling of the friction surface. also they will as mentioned above, give you longer pad life, as well as better rotor life! John
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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread "as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do! My drivers: 1987 190D 2.5Turbo 1987 190D 2.5Turbo 1987 190D 2.5-5SPEED!!!  1987 300TD 1987 300TD 1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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#5
03-12-2007, 06:39 PM
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are the SD rear discs vented too?
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1982 W123 300D NA Euro, 300K Miles, 4-speed manual, 3.46 rear diff, early W126 front brakes, Penta rims with 205/60R15 FH900's, custom fitted (by me) audio system, more to come into the money pit...  Soon to be installed: Bilstein HD, R107 front discs and 4-piston calipers, HD Suspension springs, wagon front swaybar.
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#6
03-12-2007, 06:45 PM
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Slightly OT, but my 240D came with cross drilled rear rotors (laugh here). Any idea where the PO would have got these, or are they a modified stock part?
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1979 240D- 316K miles - VGT Turbo, Intercooler, Stick Shift, Many Other Mods - Daily Driver 1982 300SD - 232K miles - Wife's Daily Driver 1986 560SL - Wife's red speed machine
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#7
03-12-2007, 06:52 PM
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Quote:
Omegabenz has upgraded his front brakes to W126 560SEL calipers + rotors.
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#8
03-12-2007, 06:55 PM
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Do they make cross drilled fronts as well?
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1979 240D- 316K miles - VGT Turbo, Intercooler, Stick Shift, Many Other Mods - Daily Driver 1982 300SD - 232K miles - Wife's Daily Driver 1986 560SL - Wife's red speed machine
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#9
03-12-2007, 11:12 PM
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Quote:
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Seth 1984 300D 225K 1985 300D Donor body 1985 300D Turbo 165K. Totaled. Donor Engine. It runs!!! 1980 300SD 311K My New Baby. 1979 BMW 633csi 62K+++? Dead odo
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#10
03-12-2007, 11:16 PM
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I wanted to put W126 calipers on my car after worldpac sent me the wrong rotors.. I ordered a front set of Brembos... The ones I got were vented and aparently to thick...
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