Is there a correct way to put slotted rotors on? I got some slotted rotors installed, but they installed it backwards. The slots are pointing forward, meaning the top of the slots are pointing forward. Doesn't look right to me. Does it really matter? Thanks.

 

You cant install a rotor backwards

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by THEUSED &raquo;</TD></TR><TR><TD CLASS="quote">You cant install a rotor backwards</TD></TR></TABLE>


If you were to install the same rotor on the Front right as the Front left, the slots would be facing in a different direction. I think this is what he is talking about.

As for the slots, it doesnt matter which way they point, they serve their purpose either direction.

 

You want to install the rotor so the slots start toward the hub(center) and work their way up to the top of the rotor. The lower end of the slot will be on the left and the top of the slot will be on the right. (I hope that makes sense) When the wheel spins foward, counter-clockwise, the gasses will start from the center and work itself outward.

 

Thanks, makes sense. The damn shop installed them backwards.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 85mm LS VTEC &raquo;</TD></TR><TR><TD CLASS="quote">You want to install the rotor so the slots start toward the hub(center) and work their way up to the top of the rotor. The lower end of the slot will be on the left and the top of the slot will be on the right. (I hope that makes sense) When the wheel spins foward, counter-clockwise, the gasses will start from the center and work itself outward. </TD></TR></TABLE>

It doesnt matter, the "gasses" will be released either way.

As for gasses, the compounds used in today's brake pads dont generate them like the old school compounds did... so slotted rotors are overrated and unneeded imo.

You are perfectly fine running blanks. Most people get in the hype thinking slotted/cross drilled rotors is what is needed on a daily driven street car, but its overkill and useless. You arent doing constant high speed braking and cornering ( or shouldnt be at least).

As for slot direction, my buddy has an Evo VI with Rotora slotted rotors. When he installed them, Rotora didnt recommend either way to place the slots, as it doesnt matter. He autocrosses and runs at Nurnburgring with race compound pads, and has never had a problem with brake fade and gas buildup.

 

You cant put them on backwards... however L vs R on slotted rotors makes a difference.

The expansion and release of gasses and brake dust is important to how your brakes function.

A thing called brake fade caused by the build up of brake dust over heating brake pads and improperly cooled rotors will cause you to lose control and feel like your floating when at high speeds.

I constantly race the lemon mountain pass in Az. There are lots of sharp corners and steep sections which call for some hard braking and steering. Invest in some cadium plated/dipped dimpled drilled rotors.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Elwuudz &raquo;</TD></TR><TR><TD CLASS="quote">You cant put them on backwards... however L vs R on slotted rotors makes a difference.

The expansion and release of gasses and brake dust is important to how your brakes function.

A thing called brake fade caused by the build up of brake dust over heating brake pads and improperly cooled rotors will cause you to lose control and feel like your floating when at high speeds.

I constantly race the lemon mountain pass in Az. There are lots of sharp corners and steep sections which call for some hard braking and steering. Invest in some cadium plated/dipped dimpled drilled rotors.

</TD></TR></TABLE>

http://www.stoptech.com/tech_i...shtml# This article explains pad fade and the charateristics of braking in general. Very good article.


As for the slotted issue at hand, this past weekend I helped install a set of brembo slotted rotors on an Evo 8. They actually had directions in the brembo box directing that the slots face forward, the reasoning had something to do with the fins internal of the rotor and their direction of spinning.

So, I was wrong in saying that it doesnt matter. I guess it matters on what brand of rotor you run, and what they have specifically engineered their product to do. Rotora didnt have any such instructions, but Brembo did.

Do your homework I guess, and contact your rotor company.

 

what do you mean by gasses?

slotted rotors are for better cooling purposes,so if you put them on backwards,they are pointless...they are directional

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by eg6T &raquo;</TD></TR><TR><TD CLASS="quote">what do you mean by gasses?

slotted rotors are for better cooling purposes,so if you put them on backwards,they are pointless...they are directional</TD></TR></TABLE>

Then what are xdrilled for?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Keebler &raquo;</TD></TR><TR><TD CLASS="quote">

Then what are xdrilled for?</TD></TR></TABLE>

cooling...

 

what did you think slotted is for? looks?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Keebler &raquo;</TD></TR><TR><TD CLASS="quote">So, I was wrong in saying that it doesnt matter. I guess it matters on what brand of rotor you run, and what they have specifically engineered their product to do. Rotora didnt have any such instructions, but Brembo did.</TD></TR></TABLE>

Damn, you dont see people admitting they are wrong very much on here, props.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by eg6T &raquo;</TD></TR><TR><TD CLASS="quote">what did you think slotted is for? looks?</TD></TR></TABLE>

Shut-up.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by eg6T &raquo;</TD></TR><TR><TD CLASS="quote">what did you think slotted is for? looks?</TD></TR></TABLE>

Are you retarded, I said what are xdrilled for, not slotted.

Maybe you need to reevaluate your position on rotors, and read the article I posted.

Slotted are for gasses, xdrilled are for cooling. Re-read your statements and tell me whats wrong with what you said. Why do you think manufacturers make slotted/xdrilled combo rotors, slotted OR xdrilled? For different purposes.

Quit being an ***.

 

i installed some crossdrilled/slotted rotors because they look pretty neat...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by eg6T &raquo;</TD></TR><TR><TD CLASS="quote">what do you mean by gasses?

slotted rotors are for better cooling purposes,so if you put them on backwards,they are pointless...they are directional</TD></TR></TABLE>

Wow . That doesn't even make sense.


And even if this guy does have his rotors on backwards, I don't see why it's that big of deal, or worth arguing about. Just get an $8 impact screwdriver from Autozone and swap the two rotors. It won't take more than 20 minutes.

 

make sure you gave Jay Z his credit if you are going to use his quotes!

 

"i came,i saw,i conquered"

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Hecdosage &raquo;</TD></TR><TR><TD CLASS="quote">make sure you gave Jay Z his credit if you are going to use his quotes!</TD></TR></TABLE>
?????????????



i would think that they would be "directional" and you would install em with the slots "pointing" towards the front of the car.

damn, someone clear this **** up already

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by niann &raquo;</TD></TR><TR><TD CLASS="quote">i would think that they would be "directional" and you would install em with the slots "pointing" towards the front of the car. </TD></TR></TABLE>

There's nothing to clear up - the slots are supposed to point towards the back of the car. I thought everyone knew that already.

I think the issue is whether or not it matters if you install them backwards with the slots pointing forward.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by niann &raquo;</TD></TR><TR><TD CLASS="quote">
?????????????



i would think that they would be "directional" and you would install em with the slots "pointing" towards the front of the car.

damn, someone clear this **** up already </TD></TR></TABLE>

It is clear... It clearly depends on the rotor manufacturer. The Rotora's I installed didnt specify a direction, but the Brembo's did.

Like I said, you need to contact your rotor manufacturer to get proper mounting specs. With the Brembo's, the slots were directed to be installed toward the front of the car. Their reasoning had something to do with the little fins that seperate the inner/outer face of the rotor as they had a certain direction they needed to spin for proper cooling.

Apparently either Rotora failed to mention this, or they just didnt have any specific mounting direction.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EnzoSpeed &raquo;</TD></TR><TR><TD CLASS="quote">

There's nothing to clear up - the slots are supposed to point towards the back of the car. I thought everyone knew that already.

I think the issue is whether or not it matters if you install them backwards with the slots pointing forward.</TD></TR></TABLE>

Thats not true at all. Brembo clearly instructed the rotors to be installed with the slots pointing toward the front of the car.


"Starting with select castings, Brembo Sport slotted brake rotors undergo the race-born practice of machining multiple shallow slots into the disc’s front and rear surfaces to provide paths to disperse built-up heat and gasses, and assist in refreshing the surface of the brake pads. Compared to cross-drilled rotors, machined slots have been widely adopted for racing and street use because they minimize the cracking caused by repeated, high stress, high temperature brake applications. The slots are angled to use the rotors’ direction of rotation to enhance their performance, which makes the rotors side-specific with left and right side rotors. Brembo Sport slotted brake rotors are sold in axle pairs and the easiest way to verify correct usage is to install the rotors on the side of the vehicle that results in the end of the slot nearest the outer edge of the rotor always contacting the brake pads first."

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Keebler &raquo;</TD></TR><TR><TD CLASS="quote">

Thats not true at all. Brembo clearly instructed the rotors to be installed with the slots pointing toward the front of the car.


"Starting with select castings, Brembo Sport slotted brake rotors undergo the race-born practice of machining multiple shallow slots into the disc’s front and rear surfaces to provide paths to disperse built-up heat and gasses, and assist in refreshing the surface of the brake pads. Compared to cross-drilled rotors, machined slots have been widely adopted for racing and street use because they minimize the cracking caused by repeated, high stress, high temperature brake applications. The slots are angled to use the rotors’ direction of rotation to enhance their performance, which makes the rotors side-specific with left and right side rotors. Brembo Sport slotted brake rotors are sold in axle pairs and the easiest way to verify correct usage is to install the rotors on the side of the vehicle that results in the end of the slot nearest the outer edge of the rotor always contacting the brake pads first."</TD></TR></TABLE>

So the slots will go like this /. Is that how you installed the rotors?

 

If that is the passenger side of the car yes.

The whole discussion was about direction, and how to find out. I merely stated that Brembo had instruction on how to do it, and Rotora didnt specify, so its really up to the rotor manufacturer.

PASSENGER
/ /

DRIVER
\ \


The outer portion of the rotor slot needs to contact the pad first as stated by Brembo.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">When the wheel spins foward, counter-clockwise, the gasses will start from the center and work itself outward.
</TD></TR></TABLE>

What you are saying is opposite. You are saying that the slots need to essentially be slanted backwards, so that the top of the rotor slot is angled towards the rear of the car. This is opposite of what Brembo has specified in their installation instruction. Essentially Brembo is saying that the gasses need to contact the outer portion of the rotor slot first, and be forced to the center of the hub.

P
A
D
\ &lt;----Direction of rotor (Driver side)


This is how I am interpreting their statement of the outer portion of the rotor slot needs to contact the pad first. I originally thought they had to be slanted backwards, but now Brembo has confused me with their instructions....So thats why i was just saying you need to contact the rotor manufacturer for their specific install directions.

Im not trying to argue with anyone here, im also trying to clear up interpretation, and installation instruction.

 

http://images.google.com/imgre...a%3DG

In this image, you will see the rotors installed as Ive interpreted the instructions to say.

Direct from Brembo.


As you can see from the cutaway, the internal fins between the mating surfaces are directional also, I think this is why Brembo states a direction for their slotted rotors to be installed.

So, whichever way you decide to do it, follow the directions of the manufacturer.