Are my Z51 rotors facing wrong?
Thread Starter
Melting Slicks
Joined: Feb 2004
Posts: 3,131
Likes: 148
From: Sugar Land TX
Are my Z51 rotors facing wrong?
Here are pics of my passenger and drivers side front Z51 rotors. Notice the direction of the holes in each with respect to where the caliper is positioned. They turn the opposite direction. The internal veins are also turning opposite. Both rotors appear to be the same. Were you to install either on the opposite side it would turn the same as the one currently on that side. The rear holes are opposite as well. Have not been off the car since I bought it new. Is this correct?
Thread Starter
Melting Slicks
Joined: Feb 2004
Posts: 3,131
Likes: 148
From: Sugar Land TX
Guess I don't have a problem then. Just seems to me air flow would be reduced on the side with the veins turning with air flow (drivers side). I believe with aftermarket there is a right and left side to keep air flow consistent.
Thread Starter
Melting Slicks
Joined: Feb 2004
Posts: 3,131
Likes: 148
From: Sugar Land TX
So in reality they are suppose to be turning the direction of the passenger side? Seems to me they would cup air and force it towards the center of the rotor the way the passenger side rotates. And on drivers side air would be force the opposite or inside of rotor to OD of rotor.
Race Director
Joined: Jan 2005
Posts: 10,924
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From: Daytona Beach FL
So in reality they are suppose to be turning the direction of the passenger side? Seems to me they would cup air and force it towards the center of the rotor the way the passenger side rotates. And on drivers side air would be force the opposite or inside of rotor to OD of rotor.
The OE Z51/Z06/GS rotors are all designed to work best on the LEFT side of the car.
The rotor should be designed to pump air away from the center of the rotor to the outside edge - like they will do properly when mounted on the left side of the car.
They work on the right side, just not as well as they would/should if they were designed correctly, like most high-end aftermarket rotors.
The worst thing about the rotors is the holes in them - they are purely for bling!!!!
Virtually all the rotors used for the track by the HPDE crowd and hard core racers will not have holes in them - they may have slots, and sometimes dimples, but NO HOLES!!!
Bob
Race Director
Joined: Sep 2007
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From: Peoria/Phoenix AZ
C6 of Year Finalist (performance mods) 2019
And if you look carefully, the rear rotor air intake is on the outside, yet the cooling tube directs air to the inside.
At least base rotors draw air correctly and are bi-directional.
At least base rotors draw air correctly and are bi-directional.
Thread Starter
Melting Slicks
Joined: Feb 2004
Posts: 3,131
Likes: 148
From: Sugar Land TX
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Tolero Apto Victum
Joined: Jul 2007
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From: Woodlands TX
Sir, just to give you a heads up. I replaced my 07 Z51 rotors with these and like them a lot. http://shop.performanceafx.com/C6-Z51-Corvette_c15.htm They are very lite and last a long time. I run GM pads with them as well. 
Thread Starter
Melting Slicks
Joined: Feb 2004
Posts: 3,131
Likes: 148
From: Sugar Land TX
Sir, just to give you a heads up. I replaced my 07 Z51 rotors with these and like them a lot. http://shop.performanceafx.com/C6-Z51-Corvette_c15.htm They are very lite and last a long time. I run GM pads with them as well.
Team Owner
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From: Northern, VA
St. Jude Donor '15
"In honor of jpee"
Tolero Apto Victum
Joined: Jul 2007
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From: Woodlands TX
Race Director
Joined: Sep 2007
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From: Peoria/Phoenix AZ
C6 of Year Finalist (performance mods) 2019
Sir, just to give you a heads up. I replaced my 07 Z51 rotors with these and like them a lot. http://shop.performanceafx.com/C6-Z51-Corvette_c15.htm They are very lite and last a long time. I run GM pads with them as well.
I'm not yet ready for new rotors, but weight will be a major factor when that time comes.
Tolero Apto Victum
Joined: Jul 2007
Posts: 9,669
Likes: 37
From: Woodlands TX
Tolero Apto Victum
Joined: Jul 2007
Posts: 9,669
Likes: 37
From: Woodlands TX
There is no technical info on their web page, but I'm curious about the actual weight and durability. Roughly how many miles plus hours of track sessions have you logged since using them and how much useable rotor thickness remains?
I'm not yet ready for new rotors, but weight will be a major factor when that time comes.
I'm not yet ready for new rotors, but weight will be a major factor when that time comes.
Thread Starter
Melting Slicks
Joined: Feb 2004
Posts: 3,131
Likes: 148
From: Sugar Land TX
For my type of driving GM base rotors, though I have a Z51, will probably last 100K miles. But like HOXXOH, weight savings would be a major factor. Gering says they told him a 27# saving over stock Z51. If that's actual then quite a good weight savings. Still pricy at over $1600 w/shipping.
