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Jim
Dodge Dakota
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11/29/2005
07:04:00
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 Subject: Slotted Rotors Problem?
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I recently installed a set of power slot rotors and Hawk brake pads. After having them on for a few thousand miles I can hear a scraping sound when applying the brakes. It is most noticable when coming to a stop. I thought it might be the sound of the pads rubbing over the slots. Is this normal?
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Jecht
Dodge Dakota
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11/29/2005
08:06:14
| RE: Slotted Rotors Problem?
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I would say its normal. as the slots basicly shaves, cuts (whatever you want to call it) the pad so yo uhave clean fresh pad to hit the rotor. basically it cleans the pad. I dont have slotted rotors but its what I think it is from reading their website about what the slots do.
its like cermaic pads on my wifes car. yo ucan hear them when braking. nothing bad happends so I dont bother to think of it when driving her car.
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Mr Midas
Dodge Dakota
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11/29/2005
09:33:52
| RE: Slotted Rotors Problem?
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Normal and on nominal profile. You're ok.
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bykerdude59
Dodge Dakota
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11/29/2005
10:56:57
| RE: Slotted Rotors Problem?
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Same situation for me. I installed my power slots and hawk pads a few thousand miles ago, but now they screech and squeal when I press the brake pedal. There is plenty of pad left though.
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Chris
Dodge Dakota
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11/29/2005
14:56:26
| RE: Slotted Rotors Problem?
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Jecht is very correct... in fact I explained this in great detail at some point a few weeks back. The slots of a rotor are designed as a "racing application" to cut away the glazing of the brake pad to allow for a clean braking surface. While this is VERY beneficial on a road course track, it will eat your pads on a street application.
I would advise taking the brakes apart and looking at the wear on the pads... make certain you still have pads!!! You don't want to go into the winter months on worn brake parts. Trust me on that one.
Also Hawk pads wear faster than most pads becuase they are a racing application part. Many of the guys I race with have these and they tear thru them if they have them on street driven cars. They are the best in the business, but they do have their draw backs.
Honestly, unless you are stuck on the tuff look of the slotted rotors, I'd ditch them and go back to stock style. If you want a big brake upgrade, go that route, but don't use the "pretty" items on the street. They cost more than they are worth.
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OBIO3
Dodge Dakota
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11/29/2005
16:58:21
| RE: Slotted Rotors Problem?
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Chris > That was a great brake evaluation >
So many times I started to put this in writing but feared there would be many flamers riping me apart because they been reading all this mis information posted on them in here > And I'll repeat your words > Buy good quality standard type rotors with quality pads and they will live a long time >
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Chris
Dodge Dakota
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11/29/2005
17:26:05
| RE: Slotted Rotors Problem?
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It isn't necessarily a the point of view, but the explanation that gets people flamed. I know from years of road course racing experience what works and what doesn't... now granted it is with Corvettes, but braking concepts and theories are essentially the same.
The largest problem with many of us... me included is that we buy into the hype and coolness factor or certain items. I'll be the first to admit that drilled and slotted rotors look tough!!! And they are very tough... on your pocket book. Now if you have a rather thick wallet or don't care about that expense, then by all means do as you wish. I am simply here to educate those who want to listen to my ramblings. If I get flamed... OFW. I can back up my claims with real world experience.
When selecting a performance part, too many people do not evaluate the use of their vehicle. I've watched people put 3½" exhaust on their cars thinking it is going to breathe so well... only to find out that the loss of back pressure killed their torque and essentially they lost power as a result.
Back to the brake post... so I'm not pirating. If you are intending on driving your truck on the street with minimal track action (mostly road courses) you'd be much better off taking the previous advice of buying quality stock style brakes and pads, unless you don't mind replacing the pads every so often.
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DSW
Dodge Dakota
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11/29/2005
19:06:39
| RE: Slotted Rotors Problem?
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Don't mean to contradict you, but these rotors do work. I don't know if it's because they provide better cooling or becauce they are make out of better metal. I have run them on 3-4 vehicles that would warp rotors and they resolved the problem. High quality rotors might have solved the problem also, but I chose to get the drilled and/or slotted ones for the slight price difference. Crap rotors $20, high Quality rotors $70, drilled and slotted $80.
I've used drilled and/or slotted rotors on several vehicles and never had odd noises under normal braking, just normal brake squeel. Under hard panic braking they make a wierd groaning noise, hard to describe, but not what I would call a scraping noise.
If your getting a scraping sound I would investigate further, maybe something is jammed into one of the holes or grooves. I have heard these types of rotors are not advised for off-roading because small rocks could get jammed into a hole and seriously chew up the brake pad.
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Chris
Dodge Dakota
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11/30/2005
11:44:37
| RE: Slotted Rotors Problem?
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It is not a contradiction at all. I have "dimpled" rotors on my vette from GT brakes (back when they were in business). It is essentially the same thing as slotted rotors. I wasn't challenging the quality of the parts. The quality of the material used is quite good in fact.
What I was commenting on is that people often put them on because they look cool... without realizing the purpose of the slots or vents in the rotor. By design, they are supposed to cut away the glazing of the brake pads... which shrinks the life of the pads. I just think for a street driven vehicle, it is cheaper and better to buy quality rotors without the slots or vents. It is just an opinion.
The approach I was taking was more from a cost effective stand point of having to replace pads every few months for a daily driven street car or truck. I wasn't trying to combat the quality of the parts. Sorry if I gave the wrong impression.
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OBIO3
Dodge Dakota
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11/30/2005
13:19:59
| RE: Slotted Rotors Problem?
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Just for the record CHRIS, I understood exactly what you was saying > Myself I prefer to go with quality that also lasts the longest time rather then the most expensive (also quality) that needs replacing more often > Just my opinion
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