Looking at the top of a rotor, right hand side, should the fins between the rotor faces be trailing away to the left or trailing to the right. It looks like they should be facing so they take air in as you move forward, but my stock ones look like they scoop away from the air.... I'd like to think air is just another "fluid" that would behave just like water when "scooped" into the rotor..... Anyone have a clue ? Also, the rotor are marked "RF" and "RR" but still look wrong..... :confused:

Just went to the Baer site and looked at the info... THANKS ! :smash:


[Modified by W8AKR, 9:43 PM 8/12/2003]

 

Things are not always as they seem or appear to be. The direction of airflow is actually contrary to what appeals to our common sense. The vane openings you are referring to are actually the exit ports of the air. Air is drawn in at the center of the rotor on the back face and centrifugally expelled at the outer rim. From Baer's website:

Failure to install rotors in the correct direction will cause premature failure.

Internally all Baer rotors are directionally ventilated and they must rotate in the correct direction of rotation to obtain proper airflow for cooling.

Externally modified Baer rotors employ a REVERSE SLOT or a REVERSE SLOT & DRILL pattern. This is current racecar practice and lowers the potential for "carbon smearing" or "transfer" from the pad material to the trailing side of the slots on the rotor. This is important because in some cases this "smearing" actually affects the rotational balance of the rotor and can cause a "shake" or "nibble" while braking.

Non-modified or plain rotors that employ a curved vane design STILL need to rotate in a specific direction. The curved vane rotor is designed to draw air into the center of the rotor and force the air to exit from the outer edge.



[Modified by Patches, 4:33 PM 8/12/2003]

 

I had the same problem/question. When I had my z06 calipers put on the other week, I was shown that the Baer rotors were put on wrong. the fin direction needs to scoop the air into the rotor as you have questioned your self. If the fins face away, they can't scoop the air! I had the guy swap both fronts and backs. I'm not even going to go into what tuner put them on backwards! :mad

 

I just read the post above mine, I'm going to poopie if my rotors are now in the wrong direction. It does look as if the rotor won't cool if the veins are in the wrong direction. The guy even showed me when he spun the wheel as if the tire was going down the road!

I can't wait to see what happens now!

 

The internal fins do not "scope" the air. The fins face away to help the heat disapate from the center. Several of us had a discussion at the cruise in about this and we asked Lou for the final answer. He comfirmed that the fins face backward, pulling air away. To further support that, my new Wilwood rotors have a directional arrow. The fins open to the back, they do not "scope".

 

Can someone just post some pics of correctly installed ones?

 

Just read the markings on the rotor. Take the wheel off and look in the center area of the rotor for the following marks LF, LR, RF, & RR. It is that simple.
Bill

 

Go to the link below for the more on the quote I posted above and pictures.
http://www.baer.com/Support/TechTips.aspx?TechTipID=2

 

You do not want the fins on the outer edge of the rotor to scoop the air. If you imgaine a swimmers hand pulling you forward THAT IS WRONG! The fins should face backwards allowing air to come from the center of the hub and evacuate out the top of the rotor.

But, as far as I know all rotors have a stamp on them that is identified as RF LF RR and LR so it's hard to screw up.




[Modified by Richin Chicago, 6:47 PM 8/12/2003]

 

I just got home to check out my factory rotors that I still have. :eek: I found that the fins are supposed to face backward just as been mentioned here. :crazy:

The frigen guy with 40 Years experience put my rotors on backward after explaining to me why my Baer Rotors were on wrong. I was having Z06 calipers put on. I insisted I saw the stickers when the rotors were new and remembered how they were labled. I do not think the Baer rotors are labled on the rotor inself. It's a sticker.

I just looked at my Rotors on the car and see what I think are cracks on the front right rotor. :mad

Anyway: Thank God it wasn't a forum tuner. He made it sound real likely that the stickers were wrong from the factoryor that the tuner didn't know what they were doing.

Time to go in tomo morning and voice my concerns.

I'm of course going to have them swap them back!

Questions: Anybody know if I damaged my rotors swapping them in the wrong direction for about 4000 miles. No real hard driving

Do I deserve anything from this guy? Oil change? I even paid the extra $35 for the so called additional labor for rotor swap. Other than this goof, the shop has been excellent. I still can't understand how a guy can be in the auto business and own a huge shop and doesn't know this simple principle


Thanks to all the people that make this forum possible. It's one hell of a resource for so many of us :flag

 

my bad, thanks for the link :cheers:

 

Thanks for the link to the Baer site.

Now I'm really Mad! :mad :banghead:

I'm one of those quite guys that really doesn't get mad too frequently! :skep:

Should I push for new rotors if the rotors are damaged. How do I even know if they are? They Rotors at this time do not pulse. The right does have a groove the looks like a rock got onto the pad and was stuck on the depressed rotor for a rotation or two. the holes do not have any cracking inside of them neither do the outside vains. The summer heat doesn't help any :bb

Thanks for the help.