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- เผยแพร่เมื่อ 28 ส.ค. 2024
- This is how you can install the Aftermarket Brake Kit !
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The drilled/slotted rotors are directional. They are designed to "cut into" the gas built up between the pads/rotor. It that way for a reason as they are designed for better clamping performance not cooling. The internal fins are what does the cooling
YEA, but you don't want to put the rotors on the wrong way IF it has curved directional cooling vanes inside. And, for general street use nobody is going to notice any difference in breaking quality or fading regardless of which way a slotted/drilled rotor is spinning. Braking on a road course has to do with the proper tires. Street radials will perform the same and offer the same exact stopping distance with factory calipers as they will with the biggest custom Brembo brake system installed......the tires can be locked up completely with either brake system. Its all about the proper tires...........
Dude, it's going to release gas build up between pads and rotors regardless of the direction slots are rotating. They go across entire braking surface. Think about it. Only matters if the cooling vanes are directional.
@@G8GTJavslots are supposed to cut into the pads to reduce pad glazing. Yes it is directional whether or not the vanes are directional. If the vanes are directional 10/10 times they will be designed to vent with slots on rotors cutting into the pads.
@@2ndAmendProtectorits not about braking quality or fade, its about pad glazing. Slots on a rotor help remove glazing. If equipped with directional Internal vanes, rotor will always have slots cutting into the pad. Look at any BBK on the market and you will see it. Even OEM manufacturers, just a quick google image search will show you this
@@09mazdasp33d that makes the most sense, that the slots should go against the grain to be the most effective in wiping the brake pad.
With cheap pads and not in race settings the drilled holes and slots are doing nothing so they are essentially for looks, as the vid says, straight cooling fins, there is no wrong way. People act like the slots and holes dig in, if that was the case have fun changing pads every month, video isn't wrong so thumbs up. The fact you specify the fins is good stuff!
thanks!
alot of misconceptions
Dude, you taught me something I no clue about thank you.
i think this is not just about the vents, but also metal warping. if you mount them directionally so the slots and holes follow the rotational pattern when you are braking, the outer lip will be locking to the pad and then inside has to slow down using the metal. if that would be opposed to the rotation, you are putting diagonal counterforce on straight metal bars essentially (which is what the diagram shows). if you mount it like you did, it may look logical but it seems to be a way to let the metal warp easier as there is no diagonal counterforce on the inside of the disc as the slots and holes are crossing the lines where the metal has to hold.
So many people commenting that he did it wrong. If you pause and read the instructions in the video it clearly says it can be reversed without sacrifice. Also centrifugal force will throw the dust from the slots regardless of direction. Not sure on cross grain to increase stopping though, neither the cross drill or slotting are meant to increase friction. Cross drill is for ventilation and cooling, slots are to scrape pad and decrease glazing and provide fresh pad to rotor contact surface. But that all is useless in a non race street car. Purely for looks.
I mean just because you technically "can" doesnt mean you should. When every major brake rotor manufacturer I've looked up instructs the veins to cut into the pad, then you've done it wrong if you do the opposite. When i click a video that says "which way to mount directional rotors, SOLVED!" and he mounts it incorrectly simply because he thinks it looks better, people are going to mention its wrong lmao. I can also mount a directional wheel on the wrong side of the car and technically drive ok, that doesnt mean you should though. And I certainly wouldnt post a video telling people to do that.
Well actually most newer race car rotors arent cross drilled just slotted. Reason is the cross drilled were used in older brake technology where the pads created gasses under heat the holes allowed the gasses to escape preventing the gas from creating a high gas pressure thus prevent the brakes from working (i think that was the brake fade phenomenon). This was very common for organic compound brakes. Slots were used to cause a slight cut to prevent glazing. For me i would rather have the slotted without the cross drilled on my regular car. But i rather have the higher performance since i have warped rotors before when u have obrupt traffic stopping on highway.
Thanks! You’re the first person I found to give a short straight forward answer to my problem!
Rickey Hawkins Jr glad you liked the video. Thanks for the comment
Doesn't the diagram at 58sec left show the opposite of what you just said feels right\corect?
I hate everything 58s? The picture later in the video shows opposite of what I did but on the bottom it says the power series rotors which I have , have. Straight cooling fan design and can be installed either way. The diagrams make it a little confusing I must admit..
This is most definitely wrong you want the slot to be going outward when you're going forward so it should be going to the outside of the rotor as it's going forward to dissipate the Dust and send it flying downward
Its all preference honestly
100% right ^^^^^^
Not just dust, but heat more importantly. Otherwise it defeats the purpose of the engineering. Not because "it looks cooler"
He literally said the opposite from what the website says.
In this video 2:30 the pic check
You want the slots slicing, the direction that you don’t like and looks like the wrong flow of direction is the proper way. It will look like it’s chopping/slicing,
Your going to show us how u guessed on how they should go?? We learned not to take ur advise!!🤦♂️🤦♂️🤦♂️
Thanks man! Simply Straight to the point. No pun intended 😉
scgamerd hahah thanks man! Goodluck.
wrong
So, at 2:22 you show the rotors showing which way you are doing them on pass. side - slots leaning towards rear of car, then at 2:26 you show a diagram with the pass. side leaning towards the front of the car. What makes you think your way is better than the manufacturers recommendation?
Mark Marquardt the diagram is from the manufacturer but the bottom it says you can swap it without sacrificing performance.
Rotors from BMW M performance with no directional veins all holes and groves face the same direction in the 4 rotors so on one side the groves will be facing frontwards and one side will be facing backward that just proves his point when there is no directional vein you can install them how ever you like. I’m pretty sure BMW knows what they are doing so.
The 1st way was yhe right way, the slotta keep pads clean by throwing out the dirt, if install otherway it will throw the dirt inwards
the slots/drilled holes DO NOT determine if the rotors are directional. rotors are ONLY directional if the internal veins are angled, if they are straight, you can put the rotors on any direction you choose.
Yup
The point of slotted rotors are to help push dust/dirt, and heat away from the pads, this is only done if the slots are going against the way the wheel rotates, otherwise if you have the slots going the same way the wheels spin then you are actually pushing the heat and dust towards the pads and inefficiently using them, might as well buy plain vented rotors as they have more surface area and wont wear your brake pads as quick.
Wrong!!!
Thank God for you lol I just received my rotors today 😆😆
Hope you enjoy them!
@@BulliKid I do, very much!!
I liked the video within the first 15 seconds!!💯👍🏿💪🏿
Thank you bro!
Wrong information it does matter the slots go into the pad
"I feel like this looks right"
Seriously? Dude is posting educational videos while guessing..not a clue.
Total wrong men I’m sorry
Yes look at the surface too. The slots throw the heat out.
Thanks for the video just what I needed
You welcome. I figured people would run into the same problem and want a solid answer.
wrong, the fins on the inside are directional yes, and so is the out side, but because of patents , each company has to make a rotor different. the correct way a slotted rotor should be is to kick dust,water, and junk to the out side of the pads, while also venting like a turbine to the outside . but most cheap companies mix the two causing brake chatter and squealing because the contact area of a revers slot is forcing the pads to load to the inside
I have a lot of squeal but at the same time it’s semi metallic pads.
@@BulliKid as long as the fins inside are bi directional (straight) should try flipping them from side to side and see if that goes away. if the grooves are pulling the pads to the inside they will squeal , the pads naturally want to load to the outside. i have had sooo many come to my shop with chatter and noise and i flip them and all that went away. these companies just sell stuff and say its right even when its wrong just to sell you something
Okok. So did I install my rotors in the wrong direction? The inside canes are straight cut.
@@BulliKid atlautosports.wordpress.com/2014/02/11/which-direction-do-my-new-drilled-and-slotted-rotors-go/
@@BulliKid like i said, companies say there is no difference, but that is not true when you get down to the science of them, take a pen and put it in the slot and spin the hub in the forward direction, youll notice on yours the pen will travel inwards from the outside to the inside, that causes dust and other things like pad dust to recirculate back to the inside. the whole point to the slots is to kick stuff to the out side of the pads and also keep the pads loaded to the outside forces of the rotor. if the slots are backwards it will suck the pad down to the inside and then after the slot has passed the pad will be sucked to the outside causing chatter and noise as the pad vibrates in and out
The problem is: you say it really "doesn't matter" and it "looks proper" putting it with the slot coming out. But I had to check perfomance cars and they all have it going against the grain. And listen to what you are saying "against the grain" making it harder spin the rotor. 🤔 Isn't that the point of stopping? Speed verses stopping. You are always sacrificing one for the other
Yes i get where you are coming from.
So How will you install your set?
@@BulliKid I have been installing them both ways on 2 different cars. But I don't know if it's just in my head, but I do feel a tighter stop with them in outer slit towards in the inside. I have looked for someone doing an actually scientific test on what stops better, but I haven't found one.
with cheap pads and not in race settings they are doing nothing so they are for looks, as he says, straight cooling fins, no wrong way
Hello, good information mate but i know this brand nakamoto, its junk. My advice use ferodo,brembo,textar,hawk rotors and brake pads.sorry my english.
Thank you.
Congrats, you did it backwards haha.
Working great!
@@BulliKid gonna wear out faster
@@jacobnicholas243 had it on for 40k milles so far and no issues. Ill Experiment again with my next set in the future
Bad explanation, the diagram at the end shows you the correct way and not what he thought it should be because it looks like its going against the grain which thats how it suppose to go, not my opinion its what the diagram is actually showing for drill slotted rotors.
I did the same thing but not sure that there is much of a benefit in reversing them. Stopping power should be the same regardless no?
Hey yo !!!! Very interesting information, I loved . U da man🤟
RODIN. PEREZ. 🙏
Wouldn’t going against the grain be more friction and provide better stopping power?
Not sure
yes he is wrong you go against the grain to put on those rotors
//OO//_____//OO// This is how slotted drilled rotor must be installed according to Detriot Axle statement..
Thanks for showing very good information 😉
🙌 uploaded early .....5am. Was hoping my mates would view and comment! Thanks
@@BulliKid it's good you got me at 8.25 PM sunday
That’s wrong dude….
The ones I got for my car had stickers on them instructing which side they went on. They went on with the slots and cross drilling. The way you said is propper pointed like / toward the back of the car when looking at them. My buddies charger came with cross drilled and slotter rotors and on one side of the car they pointed \ and the other side the pointes/ it always bugs me..
Some companies put sticker so that people don’t call and bug them. It frees up customer service from calls asking questions which side they go on. But yes the \ position would bug me too.
He's wrong you go against the grain to put on those rotors.Only if the fans are angle then you go with the grain. Those rotors have cuts that help cut into the brake to stop. If they were straight fans with no cuts or holes then they can go anyway.
After I installed my drilled slotted rotors I’ve noticed some more noise In my wheels while rolling like a low hum noise is that normal
Hmmm. I have not noticed any noise when I installed.
Those slots and directional. You figured out which side to go on,but again it is the slots that are directional
They're called vanes not cooling fans.
THE HELL FOX thanks!
I would take those mudflaps off. It's gonna cause your fenders to rust out
What was the song playing at the end called
th-cam.com/video/u2Hletfrp94/w-d-xo.html
ENJOY!
Yea I learned not to come to your channel for repairs 🤣🤣 all because they look wrong to the eye doesn’t mean that’s now how it’s supposed to work 🤣🤣 bet you’re stopping distance is bad
Things still work haha. 🤞
Nice info thanks keep it up
Thanks!
my power stop rotors are marked left and right. No problem.
That’s what happens when you buy quality
Mine too, and they say to mount them like he's doing. But every other install video says the opposite, from the outer point of the slot going in... I would think you'd want the debris being thrown away from the hub, not towards it.
Great vid
Thanks for watching
bro the directions literally showed you the direction and you said nah i dont like that
Is it me or the pic is the opposite of what he said.???????
Yes pic shows an example but read the description. Says it can go either way.
Your diagram was opposite of what you were saying
Did you change out your DOT fluid?
Pee Rez not during this time but it was done 2 years prior.
Cool bro how are the rotors working out for you?
What happend if by mistake i already had em install backwards
Well again if it’s not a directional router it doesn’t matter which way you install it
😊 thanks
🙌👍
Good to know, thanks :-)
So you read the directions and still decided to Install backwards ? Lol
It may seem like that but no.
Fins!!!!!! Not FANS!!!!!
If the vents are straight on the drilled and slotted rotors .. they’re cheap ass rotor knock offs.
Yes there were very budget ebay
You realize some bmw gt4 race cars come equipped with straight slotted rotors right?
2:26 u mixed it up
you decided to put your rotors on the sides
Huh
He has it backwards.
IT SAYS EITHER WY IS FINE IN THE DESCRIPTION OF THAT IMAGE U POSTED.
help me thanks
No problem
i don’t care how you “feel”. how you installed it is wrong.
Nobody talked abotu the structural rigidity.. did you noticed it?
disc brakes are pretty solid pieces, that can stand a reduction in its rigidity for extra cooling power BUT fo rthat need to be installed in the right way. just take a look in the disc brakes of the motorcicles. the slotes and hole trace a direction and the force that the pads applies with the direction of the rotor to be stoped will excerd a force in a different pattern that if it were a solid disc brake, i am not english speaking native,, so i could not explain it more clear.. but think it agin.
I have unstalled dozens of sets of Autoshack rotors and have always put them with the slots away as the guy did in this viseo. I installed some today and then noticed they were stamped passenger side and drivers, and were opposite and in fact cutting into the pad instead of away. I am quite sure the manufacturer has changed this, as away was always right in the past. I installed them cutting in, but don't really feel good about it, as far as potential noise.
You showed the instructions, the proceeded to install them backwards. Then said I hope you learned something. LOL Clown.
The slots is in fact supposed to cut into the pads. Powerstop is the only brand Im aware up that is not supposed to cut into the pad but instead the slots go with the pad
@2:25 the instructions show you mounted them incorrect per illustration.
It depends on where the caliper goes
WRONG 100% WRONG A$$ BACKWARDS
How are you gonna show diagrams of how rotors direction are ment to be installed and then say it doesn't matter?
Thanks man !
You installed them backwards. They are supposed to go "against the grain" as you said.
Regardless of the vent angle, the slots and holes are to clean away water and dust so the grooves should be forcing it away from the centre, the grooves should bend toward the rear.
It’s the other way around. The slots should bite into the pads.
I know that the vents are the most important on brake rotors, but according to the picture enclosed into your video, even with straight vents the direction is also important as depending on the pattern, in one direction you get more "bite" with your brake pads than in the opposite way.
Therefore there is only onto your picture an arrow pointing to the left.
If the side of the brake rotor didn't matter they would be no arrow or an arrow which is pointing to the left and also one which is pointing to the right.
Please think about it!
The higher part of the vein should face towards the back of the vehicle from what I’ve seen.
The reason you put the slots & holes pointing forward is because the cooling air is pulled from the center of the rotor outward, and also to throw that heated brake pad dust outward away from the brakes ...!
You want them to cut forward
The box usually has a model number on it with the last digit being an L or and R(right)....example 205634R
So because you feel it goes against the grain the engineers that designed the part are wrong🤣🤣🤣. We learned to laugh at you
Trust your gut feeling lol
There is a serial # on the edge of the rotor ends with either a L or R, which tells you which side the manufacture thinks you should install the rotors. I thought my mechanic knew but they made a mistake too with the front axle.
If directional each rotor should have part number stamped on it with a L or R
There is a video explaining that that slotted direction also matters becaus its must drive out the small materials from pads and discs
Hey TH-cam certified mechanic here is the proper way th-cam.com/video/xFBUUAaYSOg/w-d-xo.html
A pair for my 2000 Toyota Tundra came marked with "RH" and "LH". I installed according to the marking, but yesterday I installed my new pair on my Toyota Highlander with no markings the same way as the one with marking, I think the engineer, researchers and manufacturer knows best.....opposite of what you recommended..
I bought a set of front and rears for my 06 RSX from StopTech. The front vents are straight up and down. However according to their packaging all 4 directional rotors are opposite of what you recommended and other brands have recommended in regards to with way they should be. What the heck. I even called them and they said follow their packaging . All 4 boxes were sealed.
th-cam.com/video/5OWM1wttWA8/w-d-xo.html To everyone saying "go against the grain" There are directional vein rotors that the slots do not go against the grain like the ones in this video. So the whole "go agaisnt the grain" theory is wrong
Great tip, thanks
First time slotted drilled and I intend to have them install tomorrow morning and will have them the slotted lines against the pads. I don't care too much about pad wearine are life time warranty replacement. Cheers!
I was gonna do it the same way till my brother read the number and it says L and R but u would think they go the way u have them
I thought the purpose of a slotted rotor was to reduce brake pad glazing? It would make more sense for your rotor slots to CUT INTO your brake pads (like a trencher) as opposed to SLIP OUT through your brake pads? 😮
The cooling fans indeed matter the most but in case of straight cooling vanes, you should cut into the brake pads…
Gm tech’s around here say it doesn’t matter because you are going to replace every 6 months on their vehicles anyway.
It says on the edge of rotor which side it goes on. Get some glasses .
How about directional rear rotor without vents?
You just saved me from a heart attack! I installed a set from Detroit Axle onto my 17 Ram 1500 and a friend pointed out they were on backwards. I thought, 6 hours of brake work and busted knuckles for nothing! I found out through your video that as long as the vanes are straight, I'm fine. Detroit Axle, slotted and drilled rotors have straight vanes!
There is still an advantage to installing them properly even if the vents are straight. The theory is that the slots will wipe the brake pad and provide more consistent brake wear so you should install the slots 'against the grain' to the brake pad. This video says it doesn't matter if the vents are straight and he likes to go with the grain, but the slots work better when going against the grain.
Boy, there are a lot of strong opinions here. I have had a set on my 2005 f-150 for a few years now. They came labeled left and right, and they were angled toward the back of the vehicle. I got so tired of standard rotors warping very quickly. Every time I replaced my brakes, I thought maybe this time they will last a while. Always new rotors, since re-surfacing warped rotors is mostly counter-productive, and ceramic pads. After owning this truck for almost 15 years, it was time to try something different. It made a huge difference!!! I have no regrets. Best thing you can do for a vehicle. And to say that this is all for looks unless you are running a race car is WRONG! Now I bought a set for my wife's 2000 Rodeo, and out of the box I was scratching my head. Why are these labeled backwards?? Some searching online educated me on the internal vanes, but these were straight, so what gives? I personally believe angling them to the back is better for longer life, but angling them to the front MIGHT give you a little more aggressive stopping power. Assuming the vanes are straight inside. The slots are going to "cut" into the pads either way.
The reason that most companies put a left or right label on the rotors is simply for customer service purposes. You will see some companies say it this way and other say to do it the other way, but really it does not matter. They just label it and instruct you to do it a certain way or else they get will get a ton of calls from customers over and over asking “what way do I put it on”. Ive seen two videos from other guys that talked to these companies and confirmed this and really it makes sense especially given the fact that I’ve seen them mounted different ways even from the factory
Please revisit your diagram. It’s opposite to how you’re installing them. The slots cut into the pad.
When you hear a grinding noise in 2 weeks
There on BACKWARDS
I just ran these for like 3 years. About to finally replace them. I had no issues.
You installed them wrong bro.. that's not how they go
Worked fine.
That’s the wrong way , the slots should be facing the front of the car
The left side rotor showing on ground should be for left front of car. Grooves need to cut into the pad.
Depends on the brand, they all have different directions. Powestop wants it the way this video put it, but 1A auto says opposite
When I bought new cross drilled slotted rotors I read the directions and each was stamped labeled L&R. The opposite of what you installed. When I need to hard break with a full sized sedan the new cross drilled rotors with Akebono break pads have incredible gripping power.
So, pretty much make the straight veins just match the same direction and if they’re directional rotors, have the grooves and veins rotate toward the front of the car.
I would suggest just doing what the manufacturer recommends (veins cutting into the pad). I tend to think engineers who designed the brakes recommend they get mounted that way for a reason. When dealing with parts that effect performance weather that be stopping or going, its always best to go with what works, over what looks good.