 BMW Brakes.., ehhh...aint THAT great.. |
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| 914ghost |
 Sep 15 2004, 10:36 PM
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BOB  Group: Members Posts: 406 Joined: 25-November 03 From: Wenatchee Washington Member No.: 1,387  |
So, I gets a set of 320i brake calipers off a wrecked car the other day.
Very good clean condition, pads are like new. They were FREE, so what the heck right? I got a 70' so ..they bolt right on -- RIGHT? Not quite, but pretty slick. Bend the brake line, I had to grind on the outside of the actual caliper body just a smidge (through the part# stamping) because my wheels hit'm - 2 liter fuchs, totally stock. Not sure about that - anyways, Okay, bolt'em on, bleeed, bleed, bleed...adjusted the proportoning (big word) valve rod all the way in...tried IN and OUT not much diff. Pedal is still a bit soft, but works. Summary is: No Big deal, maybe I need the big Master cylinder? They work about as good as before. Pad area is like 40% larger, but it's not much of a difference- did I forget something? -Bob O |
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| campbellcj |
Sep 16 2004, 12:13 AM
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I can't Re Member Group: Members Posts: 4,547 Joined: 26-December 02 From: Agoura, CA Member No.: 21 Region Association: Southern California 
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No, it's not exactly hype, as you do have more pad surface area now and I guess some guys like the "feel" of these calipers better. However, any claims of significantly-improved braking performance/distances from JUST a caliper swap seem to be highly optimistic based upon various prior discussions here and on other boards. You are essentially just converting the same amount of kinetic energy into heat over a larger surface area, which is in turn conveyed into a mass of iron (the rotor) that has to try to dissipate that heat energy somehow regardless of how or where it acquired it -- before it can absorb another dose. And, maybe more importantly, you are asking your same old tires to do their maximum work even more quickly than before (i.e. threshold braking at the limits of adhesion, er, lockup.)
In practical street applications this is kind of a non-issue, but on the racetrack the concern is that you can overwhelm your rotors, tires, and other braking-related components by pumping more heat into them then they were initially designed to absorb and dissipate. So, don't worry, be happy, unless you have a real reason to be concerned (such as a brake-intensive racetrack or a rulebook that you need to obey). |
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Posts in this topic
914ghost BMW Brakes.. Sep 15 2004, 10:36 PM
lapuwali There's not likely to be a night and day diffe... Sep 15 2004, 11:32 PM campbellcj A 19mm M/C would work better with these calipers, ... Sep 15 2004, 11:33 PM 914ghost Soo...basically it's a bunch of hype.
Wow, swe... Sep 15 2004, 11:36 PM banderson I did the conversion and was not impressed either.... Sep 16 2004, 06:46 AM 9146986 Brake fade can be attributed to a few more things,... Sep 16 2004, 07:58 AM brant I still believe that the most bang for your buck i... Sep 16 2004, 08:25 AM ! Well, the big thing about them is that they are ch... Sep 16 2004, 09:24 AM 914ghost LIke I said. HYPE!
:beer1:
I have new pads,... Sep 16 2004, 10:19 AM
phantom914 ... Sep 16 2004, 10:23 AM |
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