niceroc

yes i read... and those pople might have been mis-informed just as well as i might have been... but in most racing appilcations i have seen slotted rotors... so im going to believe what ive seen and read...

RussStang

Slotted rotors are not designed to vent brake gases. Slotted rotors are designed to keep the brake pads from glazing over, and to provide a channel for brake dust to escape.

Cross drilled rotors were designed to help gases escape the rotor, but seeing as pads dont have this problem anymore, have long since outweighed their usefulness as far as performance goes.

niceroc

where'd u hear that?

it may not be a problem on the street but why do racers still use them? and how do the holes vent gases any differently then a slot would?

....and im not trying to seem condesinding about this...

RussStang

Most any up to date brake FAQ on the net will say that.

Show me a professional race team that still uses cross drilled rotors. I would really like to see this. Slots are not designed to vent gas. Look at the picture of the CTSV-R a few posts up. The car is running slotted brakes, but no cross drills to be seen.

I know a lot of the really high end racing teams use carbon ceramic brakes, and I don't think they run anything but a flat surface on the rotor at all.

Greed4Speed

Roc,
Go to pad manufacturer websites instead of rotor manufacturers and read. Modern pad materials do NOT have out gassing problems. If you don't believe us, then do yourself a favor and check out some of the roadracing or auto-x based boards.

The rotor manufacturers are saying all this to get more of your $. Its like the spark plug companies making all these designer elctrodes that cost $6/ea when regular copper plug work great at under $2/ea. Splitfire says their plugs will make more power, do you believe them too?

TobyZ28

Sounds like its working quite well too

camarookid

[QUOTE=RussStang]

Show me a professional race team that still uses cross drilled rotors. I would really like to see this. Slots are not designed to vent gas. Look at the picture of the CTSV-R a few posts up. The car is running slotted brakes, but no cross drills to be seen.QUOTE]


have you ever heard of ferrari? lamborghini? porsche?....... FORMULA 1?

Greed4Speed

Unfortunately there are plenty of fools willing to part with their money. Then there are those that just like the bling which is fine if that is why they're getting them.

Greed4Speed

Theirs is a whole different class of braking. Their brake system alone is probably worth more than your car. F1 engine also spin to 20k RPM does this mean your needs to also?

RussStang

Show me a picture of any of those teams using cross drilled rotors. Good luck finding one.

I know for damn sure that Formula 1 does not use cross drilled rotors.

niceroc

http://racing.jbskyline.net/2001/Gal...der/Bild51.php
http://www.billzilla.org/BRAKE.jpg
http://www.atspeedimages.com/scca_au...ont_brakes.jpg
http://www.zetecinside.com/xr2/pictu...ont_brakes.jpg
http://www.mogsport.co.uk/images/venteddiscs.jpg
http://www.lynxmotors.co.uk/grafix/456.jpg
theres olny a couiple i found in a few mintues...

RussStang

Ok. I have no idea why you showed me the pictures of the slotted rotors, because I have said all along that there may be some merit to them, so it is beyond me why you are trying to prove to me those are on race cars.

My only question about the drilled rotor cars; what kind of race cars are they on, and how old are the pictures?

TobyZ28

http://www.billzilla.org/fraser.htm
is the page http://www.billzilla.org/BRAKE.jpg is from. The guys just doing this as a hobby on his own personal project car (in new Zealand too ).

http://www.mogsport.co.uk/brake.htm
is where:
http://www.mogsport.co.uk/images/venteddiscs.jpg
is from, here theyre talking about dinosaurs 1960's racecars. Secondly they sell brake services/upgrades. Nothing about any modern race car using cross drilled rotors. Mainly just a picture to show they service brakes more than anything.

The rest are all slotted... as pointed out above that slotting does have its purposes. But finding slotted/crossdrilled racing rotors being used to doesn't seem to be an easy task

http://www.sae.org/servlets/productD...D=2006-01-0691

from jon's post above.

camarookid

ok well you guys were right about formula one but the car companies still use them, but i guess that they are just for looks.......

touche...