Car Chat General discussion about Lexus, other auto manufacturers and automotive news.

Which direction are slotted rotors suppose to face?

Thread Tools
 
Search this Thread
 
Old 12-08-12 | 10:50 AM
  #16  
IS350jet's Avatar
IS350jet
Pole Position
 
Joined: Sep 2006
Posts: 2,882
Likes: 1
From: Coral Springs, Fl
Default

Originally Posted by rominl
correct, the vanes are the key, NOT the holes or the slots.

and for that matter, all brands could be different. in fact, even within brembo on the same kit for the same car, you can see "different" hole directions front and rear
That is correct!! Even looking at a new IS-F will reveal that the cross drilling runs in opposite directions left to right!!
So, no, it does not matter which way the slots are facing.
Old 12-10-12 | 10:32 PM
  #17  
lobuxracer's Avatar
lobuxracer
Tech Info Resource
iTrader: (2)
 
Joined: Jul 2006
Posts: 22,456
Likes: 4,085
From: Georgia
Default

Originally Posted by MaxNine
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?
Cryo'd OEM. Blank options have only very recently become available. I would not run drilled if I had any choice.

When you say the rotors were too small for Laguna Seca, were they cooking the pads or unable to apply enough force to lock wheels?
Old 12-12-12 | 08:52 AM
  #18  
T0ked's Avatar
T0ked
Lexus Champion
iTrader: (2)
 
Joined: Nov 2002
Posts: 2,621
Likes: 3
From: New York
Default

Lots of controversy over drilled and slotted, and the newer dimpled rotors. Lots of manufacturers talk about venting gasses. A regular driver, even a spirited one, will never need this function. If you do SCCA, you may benefit, but many of them don't use these types of rotors and perform well. My MB S550 comes with cross drilled rotors. Their explanation is reduction of unsprung weight. I'll go with that.
Old 12-12-12 | 04:21 PM
  #19  
stick's Avatar
stick
Pole Position
 
Joined: Jan 2002
Posts: 372
Likes: 1
Default

Originally Posted by GSteg
It depends on the vanes of the rotor. If they're not directional, then it wouldn't really matter.



The slots on the surface of the rotors are irrelevant.
Originally Posted by lobuxracer



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.


So which way should the vanes face? Each of you have posted similar images, but in different directions.
Old 12-12-12 | 06:02 PM
  #20  
lobuxracer's Avatar
lobuxracer
Tech Info Resource
iTrader: (2)
 
Joined: Jul 2006
Posts: 22,456
Likes: 4,085
From: Georgia
Default

Originally Posted by stick
So which way should the vanes face? Each of you have posted similar images, but in different directions.
They should be marked left and right if they're Toyota discs. They definitely are on the Supra TT.
Old 12-13-12 | 03:41 AM
  #21  
IS350jet's Avatar
IS350jet
Pole Position
 
Joined: Sep 2006
Posts: 2,882
Likes: 1
From: Coral Springs, Fl
Default

Originally Posted by stick
So which way should the vanes face? Each of you have posted similar images, but in different directions.
lobux's image is correct.
Old 01-27-13 | 10:48 PM
  #22  
Kayasith95's Avatar
Kayasith95
Driver
iTrader: (4)
 
Joined: Oct 2010
Posts: 164
Likes: 0
From: tennesee
Default

what about the "kangaroo paw" vented rotors?
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
sakon3
LS - 1st and 2nd Gen (1990-2000)
17
06-11-20 02:17 PM
neomedic
Suspension and Brakes
7
12-07-11 09:27 AM
melymel96
LS - 4th Gen (2007-2017)
4
03-12-10 08:50 AM
GTSLEX
Wheels, Tires & Brakes Forum
3
09-17-09 12:29 PM
weesped
Suspension and Brakes
3
11-17-07 08:24 PM



Quick Reply: Which direction are slotted rotors suppose to face?



All times are GMT -7. The time now is 01:10 PM.