HELP Crossdrilled rotors
06-16-2002, 06:56 PM
#1
Three Wheelin'
Thread Starter
HELP Crossdrilled rotors
I installed my REAR cross drilled rotors with new pads yesterday and couldnt figure out which rotor to put on which side. Does it make a difference? I ended up going against what looked better and went with what I though would trap air and bring in towards the center. The whole patterns look like waves crashing towards the front of my car. Someone please tell me if it matters and what the reason is
06-16-2002, 08:42 PM
#3
Bada Bing
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The hole pattern is supposed to be facing the front of your car...or like you said resembling waves crashing towards the front of your car...the rotors whould have some kind of marking on them as well (usually on the inner hub.)
06-16-2002, 09:48 PM
#4
Three Wheelin'
Thread Starter
I have seen most peoples mounted the opposite of mine and how fla-TLS said. I think I heard from Brembo that they should bring air in not out so that is why I mounted them that way. The fronts are vented in between 2 plates. They definately take air in a certain way so they are definately directional. I am still unclear about the rears if they actually cause air to flow a certain way or if they just have air pass through. after all they are just holes on the sides unlike the front which have fins that scoop air.
06-16-2002, 10:01 PM
#5
Senior Moderator
I would think that the rear pattern should match the pattern of the front crossdrilled rotors and go in the same direction on each side like a directional tire.
If you are sure the fronts are mounted correctly, I would use them as a guide.
If you are sure the fronts are mounted correctly, I would use them as a guide.
06-16-2002, 10:13 PM
#6
Burning Brakes
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There might be an "L" or "R" somewhere. My Powerstop rear rotors have an "L" and "R" as the last initial on the part number. They are definately unidirectional.
06-16-2002, 10:55 PM
#7
Three Wheelin'
Thread Starter
Well I learned that slotted must be mounted like the way I have my crossdrilled rotors but that doesnt help me. The fronts have slanted vanes in the middle the rears are one fin like a plate so I can use the front as a guide since the fronts direction is determined by the angle of the center fins not the holes. Anyone know?
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06-17-2002, 12:57 AM
#8
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I asked myself the same question.... But in the end, I was correct on the direction of the holes....Here's my car..
And the rears should be going in the same direction as the front..
Ed
And the rears should be going in the same direction as the front..
Ed
06-17-2002, 10:59 PM
#11
Burning Brakes
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I hope this does not confuse the issue. From my manual:
"It is a popular misconception that the slots or drillings in a disc determine the direction of rotation. In truth, for an internally vented disc, the geometry of the vanes dicatates the direction of rotation. There are 3 vane types in use: (1) Straight (2) Pillar vane (compromised of many small posts) and (3) Curved vane.
The first two are non-directional and can be used on either side of the vehicle. The curved vane disc is directonal. A curved vane disc must be installed with the vanes running back from the inside to outside diameters in the direction of rotation. Orienting the disc in this manner creates a centrifugal pump...."
"It is a popular misconception that the slots or drillings in a disc determine the direction of rotation. In truth, for an internally vented disc, the geometry of the vanes dicatates the direction of rotation. There are 3 vane types in use: (1) Straight (2) Pillar vane (compromised of many small posts) and (3) Curved vane.
The first two are non-directional and can be used on either side of the vehicle. The curved vane disc is directonal. A curved vane disc must be installed with the vanes running back from the inside to outside diameters in the direction of rotation. Orienting the disc in this manner creates a centrifugal pump...."
06-18-2002, 10:42 AM
#13
Pro
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i sure am glad mine were not the curved hole pattern cause i am confused after reading this thread. Actually, unless you are racing your car, I highly dobt you will experience much difference. nonetheless, it would be nice to get this clarified...
Actually, unless you are racing your car, I highly dobt you will experience much difference. nonetheless, it would be nice to get this clarified...
06-20-2002, 10:57 AM
#14
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PowerStop Rotors
I was told that PowerStop didn't make Rear Rotors for our car !
Where'd you get yours ? How much ?
Where'd you get yours ? How much ?
Originally posted by DocTLTypeO
There might be an "L" or "R" somewhere. My Powerstop rear rotors have an "L" and "R" as the last initial on the part number. They are definately unidirectional.
There might be an "L" or "R" somewhere. My Powerstop rear rotors have an "L" and "R" as the last initial on the part number. They are definately unidirectional.
06-20-2002, 01:41 PM
#15
Burning Brakes
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Comptech sells solid drilled rotors. Not sure on the price but the website has it. Comptech sport
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