Its official!
Full data here (some fascinating info) http://www.stoptech.com/tech_info/wp_monobloc.shtml
But for those of you who can't be bothered to read the whole article (and other interesting brake related articles):
There is a rub. Brake calipers, especially those attached to hard driven high performance vehicles, do not operate at ambient temperature. Caliper operating temperatures can and do often exceed 300 degrees F on high performance street vehicles. � at which point the Aluminum bridge of the monobloc has lost more than half of its strength while the steel bolts in a two piece unit are unfazed. In fact, steel is essentially unaffected until around 200 degrees F where it begins to gain in strength. Steel gains 25 to 32 percent in strength when it peaks at about 400 degrees F. We are also seeing designs for production like another old Girling design called the four piece caliper (early �70's � terrible flexing problems) returning where the bridges are made of steel and incorporated into the mounting bracket instead of Aluminum for just this reason. In this design the pistons are carried in two Aluminum bodies bolted on each side of the bridges. This type, with all four pieces in Aluminum but heavily ribbed for cooling was also the design of the first Porsche Turbo caliper (mid to late �70's).
Now, who said monoblocs were better????
Full data here (some fascinating info) http://www.stoptech.com/tech_info/wp_monobloc.shtml
But for those of you who can't be bothered to read the whole article (and other interesting brake related articles):
There is a rub. Brake calipers, especially those attached to hard driven high performance vehicles, do not operate at ambient temperature. Caliper operating temperatures can and do often exceed 300 degrees F on high performance street vehicles. � at which point the Aluminum bridge of the monobloc has lost more than half of its strength while the steel bolts in a two piece unit are unfazed. In fact, steel is essentially unaffected until around 200 degrees F where it begins to gain in strength. Steel gains 25 to 32 percent in strength when it peaks at about 400 degrees F. We are also seeing designs for production like another old Girling design called the four piece caliper (early �70's � terrible flexing problems) returning where the bridges are made of steel and incorporated into the mounting bracket instead of Aluminum for just this reason. In this design the pistons are carried in two Aluminum bodies bolted on each side of the bridges. This type, with all four pieces in Aluminum but heavily ribbed for cooling was also the design of the first Porsche Turbo caliper (mid to late �70's).
Now, who said monoblocs were better????
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