JDM Factor

If anyone can find me a technical explanation on why powerslot rotors are to be installed in a, "slot forward" direction, I'd appreciate it.

JDM Factor

anyone?

ITRacer121

which way would capture more air to cool the rotor? against the dirrection of air flow or with it?

Splat

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ITRacer121 &raquo;</TD></TR><TR><TD CLASS="quote">which way would capture more air to cool the rotor? against the dirrection of air flow or with it?</TD></TR></TABLE>

He's talking about slotted, not vaned rotors.

ITRacer121

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

He's talking about slotted, not vaned rotors.</TD></TR></TABLE>

my bad

94rs-turbo

iTrader: (6)

Why not just use the zink coated brembo blanks?

neo_

You still alive here in South Florida? When are we going to meet up? Oh, and if you are still telling Mark to meet up, its no use.

JDM Factor

It's not for me, I don't need rotors, just an explanation on why power slot rotors go "slot forward" vs. slotted against direction to draw heat away.

Splat

This is still confusing... Slots aren't really for cooling. Vanes between the rotor surfaces are what help cool the rotor.

Big Phat R

From Brembo.com:

Which direction should the discs rotate?
It is a popular misconception that the slots or drillings in a disc determine the direction of rotation. In truth, for an internally vented disc, the geometry of the vanes dictates the direction of rotation. There are three vane types in use:

* Straight
* Pillar vane (comprised of many small posts)
* Curved vane

The first two vane types are non-directional, and can be used on either side of the vehicle. The curved vane disc, however, is directional. A curved vane disc must be installed with the vanes running back from the inside to outside diameters in the direction of rotation. Please see figure. Orienting the disc in the manner creates a centrifugal pump. The rotation of the disc causes air to be pumped from the center of the disc, through the vanes, and out through the outside diameter of the disc. This greatly enhances the disc's ability to dissipate heat.

Additionally, all of Brembo's slotted discs are directional as well, regardless of the vane geometry. The discs should be installed such that the end of the slot nearest the outer edge of the disc contacts the pad first.

davidnyc

http://www.superchargersonline...ID=98

some insight

JDM Factor

JDM Factor

Gotcha, I'll have to look at the vanes, thanks Big Phat R

JDM Factor

Just looked and it's a straight vane style rotor, if that's the case, wouldn't you want the slots to go in the direction as posted above in the image? I'm not trying to have a debate over it, just want to know for myself.

Big Phat R

What is right front? passenger side?

erikiksaz1

According to the picture and the snippet from Brembo, that particular rotor should be on the passenger side. That's the only way that the slot would hit the pad first. Maybe you should call up Powerslot and ask them?

RTW DC2R

I always thought slots in that direction posted above would eat the pads more quickly if mounted on the passenger front...?

Isnt the purpose of the slot to allow heat and gases to escape the pads so does it really matter which way they go? And what about the Spoon rotors, those things throw all these theories out the window

Big Phat R

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by I love lamp. &raquo;</TD></TR><TR><TD CLASS="quote">I always thought slots in that direction posted above would eat the pads more quickly if mounted on the passenger front...?

Isnt the purpose of the slot to allow heat and gases to escape the pads so does it really matter which way they go? And what about the Spoon rotors, those things throw all these theories out the window

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


I was at the track yesterday - and looked at the brakes of several cars:

1. 997 Porsche GT3RS
2. 996 Porsche GT3
3. Corvette Z06 with aftermarket StopTechs
4. Carrera GT

All of them have the slots oriented with outside edge of the slot hitting the pad first.

I think the Spoons are designed that way because they are inexpensive to manufacture.


Modified by Big Phat R at 11:41 AM 4/24/2007

JDM Factor

Exactly the way I thought they would be installed. Unless the spoon rotors are a straight cut vane, as mentioned above, the slots wouldn't matter being in that position. However, the only positive side I can think of, of why powerslot would design the slots to go the opposite direction is for consumer issues...people want the look and think it's going to stop better, and also eliminates the pad cladder noise when you install slotted rotors How I know how it eliminates pad cladder??? I swapped slotted rotors before to see if it made a difference in noise and it did when the slots were positioned in the forward direction vs. the "correct" way. If that's the case...It's pretty lame in my opinion.

heel_touge

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

Isnt the purpose of the slot to allow heat and gases to escape the pads so does it really matter which way they go? And what about the Spoon rotors, those things throw all these theories out the window
</TD></TR></TABLE>

slots and crossdrills were more necessary years ago when brake tech was less advanced. these days the pads don't create excessive amounts of "gasses". i belive the purpose of the design is really to promote friction, the spoon rotors look as though they would blow through your pads in a hartbeat but also create a good amount of friction in the process. honestly from my research on this subject the grooves and cross drills are really obsolete and are more of a gimmick. let alone a good way for the brake pad company to cash in. run oem replacements with good pads, and torque your wheels properly everytime you'll be doin A-OK.