Which direction are slotted rotors suppose to face?
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Hi guys,
I had a debate with a friend on the following:
Which direction are slotted rotors supposed to face? For example, if the calipers are closer to the driver, are the slotted rotors supposed to face towards the calipers when driving forward? Or if the calipers were in front, should the rotors aim away from the calipers, driving forward?
I had a debate with a friend on the following:
Which direction are slotted rotors supposed to face? For example, if the calipers are closer to the driver, are the slotted rotors supposed to face towards the calipers when driving forward? Or if the calipers were in front, should the rotors aim away from the calipers, driving forward?
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cross drilled and/or having slots on your rotors does improve performance (cooling/brake pad dust and wear) but not to the extent you would notice it during daily driving (or spirited driving for that matter)
so pretty much they're there for show unless you're going to compete with the car...
although.. i do agree they look cool (having cross drilled or slotted -- but not both) when done right (multi-piece rotors, non-ebay-looking cross drilled, etc)
so pretty much they're there for show unless you're going to compete with the car...
although.. i do agree they look cool (having cross drilled or slotted -- but not both) when done right (multi-piece rotors, non-ebay-looking cross drilled, etc)
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#9
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slotted/drilled rotors help ventilate small pockets of hot gas when the pad heats up during braking. If the rotor is flat like a regular car, there is no place for the gas to escape during braking until the brake pedal released. So it is to ensure maximum contact of the pad and rotor and use of the cars braking power. The slots are like irrigation ditches to channel gas away
http://auto.howstuffworks.com/auto-p...ke-rotors1.htm
http://auto.howstuffworks.com/auto-p...ke-rotors1.htm
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I just purchased some slotted and drilled rotors for my IS350 and when I replaced them I noticed the original front rotors had the cooling vanes facing the wrong direction so I had to recheck the figure above and yes they were wrong but when I installed the new ones I installed per diagram above.. Was it jus my vehicle or has anyone else come across this?
#12
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slotted/drilled rotors help ventilate small pockets of hot gas when the pad heats up during braking. If the rotor is flat like a regular car, there is no place for the gas to escape during braking until the brake pedal released. So it is to ensure maximum contact of the pad and rotor and use of the cars braking power. The slots are like irrigation ditches to channel gas away
http://auto.howstuffworks.com/auto-p...ke-rotors1.htm
http://auto.howstuffworks.com/auto-p...ke-rotors1.htm
I just purchased some slotted and drilled rotors for my IS350 and when I replaced them I noticed the original front rotors had the cooling vanes facing the wrong direction so I had to recheck the figure above and yes they were wrong but when I installed the new ones I installed per diagram above.. Was it jus my vehicle or has anyone else come across this?
This shows the proper installation of the front rotors on the MkIV Supra. We argued about this on an email list many years ago and discovered Toyota got it right. Keep in mind, as soon as the disc is rotating, the outer edge has a higher linear speed than the inner edge. This guarantees the air flow is from the root of the disc to the edge, not the other way around.
Last edited by lobuxracer; 12-06-12 at 04:21 PM.
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From the research I did a long time ago, blanks are the best because they give you the most surface area for braking. Unless you drive a race car where the brakes are getting red hot, I don't believe slotted, drilled or both would really be beneficial. I had slotted rotors on my last car and the only thing I noticed was that it ate the pads faster lol.
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I just replace my tiny stock rotors/calipers in my 240SX with bigger rotors/calipers from a Q45. I also got slotted/drilled rotors instead of blanks, hoping these will give me enough braking once I take it back to Laguna Seca. The stock 240SX brakes were not enough for turns 2 and 11 on Laguna Seca.
To lobuxracer, I know you replaced the rotors on the ISF after you discovered cracks between the drill holes, what type of rotors did you go with?
To lobuxracer, I know you replaced the rotors on the ISF after you discovered cracks between the drill holes, what type of rotors did you go with?