Are these Junk? If not they are very reasonable in price

[izmyttz]

http://cgi.ebay.com/ebaymotors/ws/eBayI ... 51613&rd=1]http://magnumbrakes.com/

[Zak427]

if your worried about the rep try these out for only 38 dollars more with shipping

http://www.conceptzperformance...1.248

[izmyttz]

yeah but that is only for the front set..the ebay auction is for both front and rear

if your worried about the rep try these out for only 38 dollars more with shipping

http://www.conceptzperformance...1.248

[Honad]

Without too much comment about how cross drilled rotors are f'ing worthless I will say that I certainly wouldn't buy them. Even if I were to buy something cross drilled, I would absolutely not buy them from a source I didn't trust.

Don't be a cheap ***, buck up and spend some money on the real deal.

[izmyttz]

Wow you must not know much about rotors...You think Porsche and Ferarri and other exotic car manufacturers put cross drilled rotors on their cars to make them look cooler? Lol...Yeah I dunno where you learned about brakes but I'd go back and kick your teacher in the nuts.

Without too much comment about how cross drilled rotors are f'ing worthless I will say that I certainly wouldn't buy them. Even if I were to buy something cross drilled, I would absolutely not buy them from a source I didn't trust.

Don't be a cheap ***, buck up and spend some money on the real deal.

[izmyttz]

Here let me help you out with how "CROSS DRILLED ROTORS WORK".........



Quote »The cross-drilling, seemingly the stuff of wannabe racer Civics, is worth more than poseur points; it actually helps the brakes work better. Under hard braking, a brake pad's bonding agents burn off and produce gases. Cross-drilled holes allow those gases to vent, helping to prevent brake fade. Also, when water contaminates the rotor's surface, the holes allow moisture and muck out rather than causing the pad to "float" over the surface of the rotor.

Cross-drilling also improves rotor cooling, again defeating brake fade. On cross-drilled rotors, temperatures can be reduced by as much as 200 degrees during extreme braking when compared to stock rotors. Since braking is essentially the absorption of a moving vehicle's kinetic energy and conversion into heat, rotors that quickly and efficiently dissipate heat perform better. Cross-drilled rotors increase rate of heat dissipation by increasing surface area, allowing gases to escape, and increasing air flow.

[/quote]

[Honad]

Wow you must not know much about rotors...You think Porsche and Ferarri and other exotic car manufacturers put cross drilled rotors on their cars to make them look cooler? Lol...Yeah I dunno where you learned about brakes but I'd go back and kick your teacher in the nuts.

I think my years of experiance autocrossing and road racing and the shelves full of trophies saying that I have indeed properly used my brakes have everything to do with my opinion on why cross drilled rotors are junk. The "benefit" they claim to provide is negated by surface area lost, but ultimately, I've seen one too many rotors explode on track. The cause? Stress fractures in cross drilled crapola.

Very few over the shelf ricer mod bs "cross drilled" rotors will stand up to abuse. Cryo-Treated cross drilled rotors certainly have their place in the racing world, you do see them on some extremely great breaking systems, unfortunately absolutely none of these braking systems were purchased on eBay for 100 bucks.

[Zak427]

what about slotted...opinions?

[izmyttz]

"Explode on track"? How is this done since you are an "autocross" and road racer? Wouldn't that statement imply you actually raced on real tracks and not coned off parking lots dodging orange cones testing your handling skills? Autocross courses are typically 40 to 70 seconds in length. That's not a long time to be "testing your brakes" so I think I'll stick with the tests and professionals that say cross drilled rotors actually work like they were designed to. The Ebay ricer junk they sell may not be what I need but I'm not going to be doing track racing. I may just go with the Brembo cross drilled rotors. Brembo has been making brakes longer than you've been dodging cones I'm sure of that. Congrats on the shelves full of trophies.

I think my years of experiance autocrossing and road racing and the shelves full of trophies saying that I have indeed properly used my brakes have everything to do with my opinion on why cross drilled rotors are junk. The "benefit" they claim to provide is negated by surface area lost, but ultimately, I've seen one too many rotors explode on track. The cause? Stress fractures in cross drilled crapola.

Very few over the shelf ricer mod bs "cross drilled" rotors will stand up to abuse. Cryo-Treated cross drilled rotors certainly have their place in the racing world, you do see them on some extremely great breaking systems, unfortunately absolutely none of these braking systems were purchased on eBay for 100 bucks.

[izmyttz]

From my understanding the "slotted" rotors are more for track use. They actually skim a small layer of the rotor off under extreme conditions. So in other words they wouldn't last near as long for daily use. Track use they would be great. Think of them as a hot knife cutting cheese

what about slotted...opinions?

[Stig]

...You think Porsche and Ferarri and other exotic car manufacturers put cross drilled rotors on their cars to make them look cooler? Lol...

If you want to know what to use on the track or to get the best performance from your brakes, look at what the Porsche and Ferrari RACE teams use, they run non-drilled rotors, because they used to run drilled back in the day, but they would crack and break in extreme conditions, so they started fitting bigger non-drilled, thicker rotors that don't crack and used a pad that had a champher (slot) in them to release the gas build up.

This does not include the carbon rotors that are more widely used now.

[izmyttz]

yeah i read that recently. I was referring to the street cars like th e911 and the Cayman S. They use the cross drilled on them as an option. They probably work great for everyday driving use and not track.

If you want to know what to use on the track or to get the best performance from your brakes, look at what the Porsche and Ferrari RACE teams use, they run non-drilled rotors, because they used to run drilled back in the day, but they would crack and break in extreme conditions, so they started fitting bigger non-drilled, thicker rotors that don't crack and used a pad that had a champher (slot) in them to release the gas build up.

This does not include the carbon rotors that are more widely used now.

[Honad]

"Explode on track"? How is this done since you are an "autocross" and road racer? Wouldn't that statement imply you actually raced on real tracks and not coned off parking lots dodging orange cones testing your handling skills? Autocross courses are typically 40 to 70 seconds in length. That's not a long time to be "testing your brakes" so I think I'll stick with the tests and professionals that say cross drilled rotors actually work like they were designed to. The Ebay ricer junk they sell may not be what I need but I'm not going to be doing track racing. I may just go with the Brembo cross drilled rotors. Brembo has been making brakes longer than you've been dodging cones I'm sure of that. Congrats on the shelves full of trophies.

Yes, I have hundreds and hundreds of hours and thousands of laps on road courses, not to mention that I've been Autocrossing since you were in short pants. I was hoping that mentioning it, and the fact that I have seen a guy with Brembo cross drilled rotors have them explode... yes, explode and put his new STi into a wall. I've also seen a Porsche 911 (also with cross drilled rotors) lose his brakes and go into a wall and die. Those events made me decide that the brakes weren't for me.

eBay ricer junk is just that and even if you go with a known good brand, they can still get stress fractures and/or come apart at the seams. Granted you're never going to get your brakes to the temperatures that they see on the track. If you're granny'ing your car around the street you probably won't ever see the extreme conditions necessary to make your rotors fail. But, I assume you drag race and coming down from high speeds quickly will certainly get them up to temp and cause the same sort of strees fractures that we speak of.

You know what, do what you want. I obviously am not changing "what the professionals that are trying to sell you some ****" say. Get cross drilled rotors. They would totally rule for you.

[Zak427]

Honad....... I just wanted to add i ride bikes to. My R1 comes wit cross-drilled rotors stock. granted they will never see the stress a car does and being totally exposed they get lots of cooling...but it they were in anyway a bad idea. they would not be on motorcycles. for so many years now.

and since were on the cross drilled topic, i can see how they can crack under extreme temperatures. what about just dimpled rotors. i'm just looking for a way to reduce chances of warping on street use. without spending 2000 on a brake system.

[Zak427]

i run ebc brakes on my bikes for years and have been very satisfied, you can get them anywhere for under 200 per pair. i currently run the Ultimax BlackDash USR Slotted Rotors. and love the result

http://www.ebcbrakes.com/rotorinfo.html

[izmyttz]

I've been Autocrossing since you were in short pants.

??? Lol you're 3 years older than me!!! Makes me laugh.....N E Ways....I see your point. I have researched the exploding cross drilled rotors.....I think if I do get them it will be Brembo....and I don't race. I just like my Z alot. I think that for street driving and normal to hard braking around town that they would work fine. I don't doubt your experience I just know that for some applications that cross drilled rotors would be fine.

[Honad]

Instead of buying cross drilled rotors, your money would be more wisely spent picking up a set of nice pads, I recommend Hawk HPS's for your application, converting your brake lines to a braided and flushing and filling your system with some nicer fluid. Without the aformentioned parts, you will gain very little by simply replacing rotors, cross drilled, slotted, dimpled, stock, carbon or made of fairy dust.

[freakonaleash1187]

I would gladly stand behind Honad's word as I know personally that he has quite a bit of track experience both "dodging cones" and racing around road courses, and I also know personally that he is a pretty damn good driver at that. He was beating my times in my Z with his Civic Si (still haunts me to this day, lol).

So to the point of the thread, yes, cross-drilled rotors are used in high-end cars on the street, but those rotors aren't some cheap ebay ones, so you can't even compare them. Don't cheap out on something as important as your brakes.

[Honad]

I would gladly stand behind Honad's word as I know personally that he has quite a bit of track experience both "dodging cones" and racing around road courses, and I also know personally that he is a pretty damn good driver at that. He was beating my times in my Z with his Civic Si (still haunts me to this day, lol).

So to the point of the thread, yes, cross-drilled rotors are used in high-end cars on the street, but those rotors aren't some cheap ebay ones, so you can't even compare them. Don't cheap out on something as important as your brakes.

Again, your goal, a 1:49 at MAM.

(Secret: I will indeed be filling up your mirrors at MAM later this month. )

[freakonaleash1187]

Again, your goal, a 1:49 at MAM.

I get a 5 second handicap since my Z is probably about 350lbs fatter than your Z.

(Secret: I will indeed be filling up your mirrors at MAM later this month. )

I like the sound of that.

[Honad]

Deal, 5 second handicap. Loser buys a burger for the other.

[tg]

crossdrilled is bull****, i too have seen them blow apart at track events. Divotted is different, and most of what you guys are saying about known car/bike companies putting them on is actually not crossdrilled, they are cast-in holes and are not drilled in after casting, eliminating the weakness of hole-to-hole spread of cracks.

Slotted is the way to go, less surface area loss, more even waste gas removal, and doesn't make nice connect-the-dots for stress fractures. Any more than 5 slots on a disc is useless and you're wasting surface area.

get some brembo blanks slotted for front and rear, spend the extra money and don't buy **** off ebay.

also don't beef with honad, you asked if they were **** and he told you they are ****, and he's right.

[clickdoc]

I have the brembos -- they are GREAT ! Only street though -- no racing for me although the last owner drove like a $%#& race car driver every day -- scared me to death doing like 75-80 on every exit & on ramp -- the brembos held up for him for years !

[freakonaleash1187]

Deal, 5 second handicap. Loser buys a burger for the other.

1. 5 second handicap for a fatter Z2. 4 second handicap for less experience

Lets make it a 9 second handicap and it will be a deal.

*holds hand out to shake on it*

[T45]

This thread makes me laugh. If you want more grip and less fade spend your money on a good set of pads and braided brake lines. Then, if you are still getting outbraked in your professional town cruising, get slotted rotors.