Cross drilles and slotted rotors,

[ccdies]

Are cross drilled and slotted rotors worth the money to have or are they just for looks? What's your thoughts?

[arkenzo]

I had some slotted rotors by r1concepts on my Mazdaspeed3 back in late 2007, i did notice an improvement in breaking power, though it could have been a combination of the slotted rotors and EBC brake pads

 

Regardless, they looked hella nice

[ccdies]

Yeah I love the way they look, just don't know if there's any actual performance stuff out of them, if stocks are stronger then I'll keep them,, but if cross drilled and slotted rotors are stronger and better then ill go with them,

 

 

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[Strykers_Inc]

Brake upgrades for the really good stuff are hella expensive. No drilled holes or slots is good for the racetrack with six piston calipers, drilled is good for overall performance and adds to stopping power for normal vehicles, and slotted is good for towing applications. Alot of manufactures mix the latter two and make drilled and slotted rotors. I went with just stock calipers and drilled rotors and it is definately different. I have more feel on the pedal. Later I will go with the six piston drilled by Baer or AP Racing. Just too much on the plate to make that investment until later down the road.

[ccdies]

I think I'm gonna go ahead and order them, and wait till I need to replace my stock brake pads then ill change out the rotors

[MikeNH]

On the new trucks I'd be willing to bet anything but a complete system replacement would result in a loss of performance. The drilled rotors are a sham, you're trading extremely valuable surface area on the rotor for out gassing protection you likely don't need.

[ccdies]

On the new trucks I'd be willing to bet anything but a complete system replacement would result in a loss of performance. The drilled rotors are a sham, you're trading extremely valuable surface area on the rotor for out gassing protection you likely don't need.

that's what I've seen when I googled stock VS crossdrilled and slotted, just seeing what every one thinks is before I order them, so I'm guessing id order them just for looks, but I've had my truck since it was stock, so I can tell difference with the lift and wheels in braking power, and then when I hook up to my trailer (with no brakes) I just wonder if crossdrilled and slotted would help or be about the same as stock

[MikeNH]

They won't. GM has gotten serious about the quality of their brake stuff on the new trucks and the cross drilled stuff will be third rate china junk. The only way you'll see a real performance gain is a full kit- calipers, pads and rotors from one of the good companies and that'll be well over $1000 I bet. Save your money. They may look cool but they'll be garbage.

[ccdies]

They won't. GM has gotten serious about the quality of their brake stuff on the new trucks and the cross drilled stuff will be third rate china junk. The only way you'll see a real performance gain is a full kit- calipers, pads and rotors from one of the good companies and that'll be well over $1000 I bet. Save your money. They may look cool but they'll be garbage.

Thanks,,

[patriot]

Isn't the internet wonderful? So many correct opinions.

[TJay74]

On the new trucks I'd be willing to bet anything but a complete system replacement would result in a loss of performance. The drilled rotors are a sham, you're trading extremely valuable surface area on the rotor for out gassing protection you likely don't need.

 

This is so far from the truth it isn't even funny. If that was the case GM wouldn't have them on the Corvette, the higher end Camaros nor would Ferrari or any of the other supercar companies. Porsches and even GM carbon ceramic brakes are all cross drilled. The cross drilling allows the gases generated from hard braking to escape out thru the rotor into the vanes which then is forced out thru the cooling process. This allows the pads to stay on the rotor surface better and helps improve braking performance.

 

Formula F1 cars are not drilled, but they also force massive amounts of air thru the center of the rotor and out thru the cooling vanes to keep the rotors cool. NASCAR still uses slotted or drilled rotors on some cars.

 

I had a 2001 Formula, the car would warp a set of GM, or any other brand rotors in about 10-15K miles. I swapped over to Baer's replacement 2 piece rotors along with better pads and never had an issue ever again with warpage, plus the car stopped immensely better as well. My 2008 Corvette had the Z51 package on it with the factory drilled rotors, that car would stop on an instant with no issues or brake fade.

 

As soon as the pads are done on this truck it is getting drilled/slotted rotors and better pads on both ends.

[Habs]

Yeah, I wouldn't take advice from people on the internet. Go to a reputable garage/mechanic who do this for a living...

[MikeNH]

 

This is so far from the truth it isn't even funny. If that was the case GM wouldn't have them on the Corvette, the higher end Camaros nor would Ferrari or any of the other supercar companies. Porsches and even GM carbon ceramic brakes are all cross drilled. The cross drilling allows the gases generated from hard braking to escape out thru the rotor into the vanes which then is forced out thru the cooling process. This allows the pads to stay on the rotor surface better and helps improve braking performance.

 

Formula F1 cars are not drilled, but they also force massive amounts of air thru the center of the rotor and out thru the cooling vanes to keep the rotors cool. NASCAR still uses slotted or drilled rotors on some cars.

 

I had a 2001 Formula, the car would warp a set of GM, or any other brand rotors in about 10-15K miles. I swapped over to Baer's replacement 2 piece rotors along with better pads and never had an issue ever again with warpage, plus the car stopped immensely better as well. My 2008 Corvette had the Z51 package on it with the factory drilled rotors, that car would stop on an instant with no issues or brake fade.

 

As soon as the pads are done on this truck it is getting drilled/slotted rotors and better pads on both ends.

 

Those are all properly designed and the rotors are WAY bigger than the china shit the OP is likely looking at. You're talking high performance OEM and qualify aftermarket parts. There is a huge difference.

[iCryWheniGoPoop]

I have done a lot of track time out at TMS and Hallet and when I first started, that was one of my first "upgrades" only to find out that i was quickly plagued with cracks originating from each and every hole in the rotor. It may have been a combination of inferior materials, the machining of the holes causing stress risers or even the possibility an uneven heating/cooling pattern due to the cross drilling as well but I went back to factory BMW M Lightweight brake rotors which were solid, never had another issue and I never looked back.

 

I don't think your truck is going to heat cycle any rotor to this point unless you are a two footed driver, so you will more than likely never experience this issue but I just thought I would share my experience.

[ccdies]

These are some very good points

 

 

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