Most warped rotors are due to cheaply sourced rotors. The foundrys that are pouring for GM,DC and Ford are not git to make cannons. They are dirt floor foundrys in some cases with no place to dump a bad load of iron or steel. THey are not chaecking the temp at the molds. THe fact that the metal is at the right temp at the cupola is meaningless at the mold. You have good old boys eyeballing the iron by color!
Their is also a lack of good quality control on the material side of things. THe only redeeming thing is that they are cheap!!
As much as it pains me to say this the chineese are actualy makeing a better quality rotor then most U.S. and Canada SOurced rotors.
This is improveing though. As many DOmestic car manufactures have noticed the large gap in quality between them and their competitiors brakes. Most domestic products with automatic terans get about 12,000-16,000 miles per rotor and pad set compared to most import vechiles getting into the 60,000-100,000 mile rang or more with either origanal pads and rotor. Seldom do you replace rotors on a Toyota with leth then 150,000 miles! Their drums usualy last even longer! Prior to outsourced GM had some of the finest foundrys in the world!!!
I tired to convince the company I work for to ad more nickle and some cromium to the spec for our rotors but I was told to take a hike! I also proposed a few methods to help the parts cool more evenly.
This information I presented came right from a gentle man that was once reponseable for improveing GM's foundrys in the mid 1980's and he ran them until they outsourced everything. He now works for American Axle.
[ December 20, 2003, 04:09 PM: Message edited by: JohnBrowning ]
Their is also a lack of good quality control on the material side of things. THe only redeeming thing is that they are cheap!!
As much as it pains me to say this the chineese are actualy makeing a better quality rotor then most U.S. and Canada SOurced rotors.
This is improveing though. As many DOmestic car manufactures have noticed the large gap in quality between them and their competitiors brakes. Most domestic products with automatic terans get about 12,000-16,000 miles per rotor and pad set compared to most import vechiles getting into the 60,000-100,000 mile rang or more with either origanal pads and rotor. Seldom do you replace rotors on a Toyota with leth then 150,000 miles! Their drums usualy last even longer! Prior to outsourced GM had some of the finest foundrys in the world!!!
I tired to convince the company I work for to ad more nickle and some cromium to the spec for our rotors but I was told to take a hike! I also proposed a few methods to help the parts cool more evenly.
This information I presented came right from a gentle man that was once reponseable for improveing GM's foundrys in the mid 1980's and he ran them until they outsourced everything. He now works for American Axle.
[ December 20, 2003, 04:09 PM: Message edited by: JohnBrowning ]
