Why are the front brake rotors uniquely specified on each side?
02-08-2008, 03:37 PM
#61
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Just spinning a curved vs straight rotor will show you the difference.
spin it at high speed and it is obvious.
no one will notice, as you say, except if you are tracking your car
mk
spin it at high speed and it is obvious.
no one will notice, as you say, except if you are tracking your car
mk
Any vane creates a centrigal blower.
The vanes being straight or curved is probably not as important as you might think. I don't believe that any of us would ever notice the difference between a straight or curved vane. I have curved vanes on my rotors but wouldn't feel less confidant if they were straight.
The vanes being straight or curved is probably not as important as you might think. I don't believe that any of us would ever notice the difference between a straight or curved vane. I have curved vanes on my rotors but wouldn't feel less confidant if they were straight.
02-08-2008, 03:45 PM
#62
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I think a better response to this is that all these things that porsche did were with purpose and do work. however, when they work to a point where most will notice, is the question. they made a car that could race 24hous of lemans out of the box! vented rotors, brake ducts, are just a few of the things porsche did to make the car work best under extreme circumstances. Most of us will never use a fraction of the cars design purpose on the street. (even if we try)
mk
mk
02-08-2008, 04:29 PM
#63
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Other than the benefit of cooler brakes, you are also pulling heat outward away from the wheel bearing. I have heard of people killing wheel bearings with rotors installed backwards even though they didn't feel any braking difference.
02-08-2008, 05:35 PM
#64
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thats also tough to believe, in that my bearings are subjected to such higher temps. an order of magnatude higher than any kind of street drving,and mine lasted 6 years and 91 race days. this is probably a side effect of the radially flowing brake rotors, but i dont think it would hurt anything even over the long haul. I would have no problem putting on S4 rotors on backward if it was ONLY a street car. want proof, look how sucessful the early 928s were with no special rotors and hockey pucks for brake pads.
mk
mk
02-08-2008, 05:58 PM
#65
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Ok, this thread is getting silly. 
02-08-2008, 06:10 PM
#66
Three Wheelin'
02-08-2008, 06:55 PM
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Pouring molten iron into a mold is about the same no matter the shape of the vanes really very little difference. Obviously some one felt that the curved vanes work better...it is the % improvement that is unknown. Note that the passages are smaller toward the center and bigger near the outer edge....would that be a venturi ?
02-08-2008, 07:10 PM
#68
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Pouring molten iron into a mold is about the same no matter the shape of the vanes really very little difference. Obviously some one felt that the curved vanes work better...it is the % improvement that is unknown. Note that the passages are smaller toward the center and bigger near the outer edge....would that be a venturi ?
02-08-2008, 09:01 PM
#69
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Having carefully drilled the chamfered a whole bunch of holes in a pattern which missed all the ribs I really know what they look like 
I also lightly ported them and removed some of the flashing ... I must have been having a Brendan moment
I also lightly ported them and removed some of the flashing ... I must have been having a Brendan moment
02-08-2008, 10:14 PM
#70
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you really need to chamfer the inside of the holes as well as the outside to prevent cracks from them being drilled. So far I have yet to find a tool to do this.
02-08-2008, 10:24 PM
#71
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I want to know if you put the rotors on backwards, what will happen if the car is on a conveyor belt....
02-09-2008, 11:35 AM
#72
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If straight vanes and curved vanes are the same turbo chargers would have straight vanes.
02-09-2008, 11:37 AM
#73
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02-09-2008, 12:21 PM
#74
Three Wheelin'
I've actually made sraight vaned turbo impellors and they worked very well.
This is getting silly. The original point was that the curve may not be as critical as some might think, not that they are identical.
02-09-2008, 12:22 PM
#75
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It's that US English versus UK English - two countries separated by a common language. (Also applies between NZ and OZ, UK and NZ, OZ and NZ etc.)
Sometimes it can be very difficult to describe something without being unintentionally ambiguous in supposedly the same language read in a different country. Hence the simplistic approach. Apologies if it offends - Not the intention.
Sometimes it can be very difficult to describe something without being unintentionally ambiguous in supposedly the same language read in a different country. Hence the simplistic approach. Apologies if it offends - Not the intention.
No wonder its tricky to describe.
