S/C --> T/C Calipers
These days it is nearly entirely for weight savings when it comes to high quality race rotors, the manufacturers even say so. On the street then only point of drilled rotors is to make it LOOK like youve got fancy race rotors(and again, some of the manufacturers even point this out)
Originally Posted by RBC
A cross drilled rotor yes in some way reduces weight as anything you take material out of, but the main purpose is to allow the gas to escape and not interfere with the surface area and allow more gas out and more air through and allow more cooling. And yes if you buy cheap rotors they do tend to "crack" but the "cracking" is avoided with by purchasing most top quality rotors.
then why wont you find drilled rotors as the main stay of many(any?) high performance/racing brake companies product line? Whether youre talking about Wilwood, Brembo, Alcon, Performance Friction, EBC, etc..... none of these companies recommend drilled rotors for street duty, some of them flat out tell you that drilled rotors are weight reduction ONLY, others have straight up said the only reason they offer drilled street rotors is because so many people want the "look" of race brakes.
Even in the racing world the place youre most likely to find drilled rotors is on every light cars, or vehicles that dont run on asphalt(dirt modifieds) so that there is less place for debris to buildup on rotors.
I would have thought that they're gonna be a bit pricey because they're Brembos...If the swap can be done(I'm sure it can, you just have to watch out for the wheel clearance) You have to use the Brembo Calipers and Rotors. So it's gonna cost no matter where you get them. But they look good.
I agree, Ill go so far as to added that all stock replacement type drilled rotors are inferior as compared to a like quality slotted only rotor.
These days it is nearly entirely for weight savings when it comes to high quality race rotors, the manufacturers even say so. On the street then only point of drilled rotors is to make it LOOK like youve got fancy race rotors(and again, some of the manufacturers even point this out)
As far as aiding in outgassing, etc... well thats also true, but youre forgetting why it was originally done.....its easy to do, machining slots its relatively new, drilling holes was once the only way to keep pad gasses from building up a boundary layer and stopping you from , stopping. Drilling causes cracks, they knew it back then they no it now, drilling reduces mass and swept area(by as much as 30% depending on pattern) they knew it back then they know it now, drilling as a bad idea for street rotors, they knew it back then, they know it now. Yes drilled rotors "can" cool down faster because of their larger surface area....problem is, is that they heat up much faster too because of their reduce mass. As far as cracking goes, it comes with drilled rotors, period. All ferrous rotors will crack if drilled, theres nothing you can do about.
then why wont you find drilled rotors as the main stay of many(any?) high performance/racing brake companies product line? Whether youre talking about Wilwood, Brembo, Alcon, Performance Friction, EBC, etc..... none of these companies recommend drilled rotors for street duty, some of them flat out tell you that drilled rotors are weight reduction ONLY, others have straight up said the only reason they offer drilled street rotors is because so many people want the "look" of race brakes.
Even in the racing world the place youre most likely to find drilled rotors is on every light cars, or vehicles that dont run on asphalt(dirt modifieds) so that there is less place for debris to buildup on rotors.
These days it is nearly entirely for weight savings when it comes to high quality race rotors, the manufacturers even say so. On the street then only point of drilled rotors is to make it LOOK like youve got fancy race rotors(and again, some of the manufacturers even point this out)
As far as aiding in outgassing, etc... well thats also true, but youre forgetting why it was originally done.....its easy to do, machining slots its relatively new, drilling holes was once the only way to keep pad gasses from building up a boundary layer and stopping you from , stopping. Drilling causes cracks, they knew it back then they no it now, drilling reduces mass and swept area(by as much as 30% depending on pattern) they knew it back then they know it now, drilling as a bad idea for street rotors, they knew it back then, they know it now. Yes drilled rotors "can" cool down faster because of their larger surface area....problem is, is that they heat up much faster too because of their reduce mass. As far as cracking goes, it comes with drilled rotors, period. All ferrous rotors will crack if drilled, theres nothing you can do about.
then why wont you find drilled rotors as the main stay of many(any?) high performance/racing brake companies product line? Whether youre talking about Wilwood, Brembo, Alcon, Performance Friction, EBC, etc..... none of these companies recommend drilled rotors for street duty, some of them flat out tell you that drilled rotors are weight reduction ONLY, others have straight up said the only reason they offer drilled street rotors is because so many people want the "look" of race brakes.
Even in the racing world the place youre most likely to find drilled rotors is on every light cars, or vehicles that dont run on asphalt(dirt modifieds) so that there is less place for debris to buildup on rotors.
If you need them for looks, I understand, I just dont agree. Thats whats cool about liking something, just because you do, doesnt mean I have to.....
My point isnt that they only save weight, obviously they can help today in the same way they helped in years past....my point is that there really isnt a need for them for really any of us on this forum and in my opinion the potential drawbacks outweigh the potential benefits. I know that all things racing doesnt translate directly to the street, but if the average production based road racer doenst need them, why do you besides looks?
If you need them for looks, I understand, I just dont agree. Thats whats cool about liking something, just because you do, doesnt mean I have to.....
If you need them for looks, I understand, I just dont agree. Thats whats cool about liking something, just because you do, doesnt mean I have to.....
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