[DeTomaso] Rear Brake Vent

[burrid1 at netzero.net]

The only manufactures of mechanical parking brakes I know of that meet NHTSA (National Highway Traffic Safety Administration) standards are Brembo, StopTech, and the standard Viper SRT-10 (Thanks to Mark Hoffman for bringing the Viper to my attention) and they all work about the same. The calipers along with the pads are free floating to allow the pads to always remain centered over the rotor, and the calipers are self- adjusting. 
Although NHTSA final rule extending Standard No. 105's parking brake requirements to multipurpose passenger vehicles, trucks, and buses with a GVWR of 10,000 pounds or less was published on January 2, 1981 (46FR 55). Among other things, it required parking brakes on multipurpose passenger vehicles, trucks, and buses with a GVWR of 10,000 pounds or less to hold the vehicle stationary, in both forward and reverse directions, for five minutes on a 30 percent grade. In response to three petitions for reconsideration, the agency decided to change the gradient requirement for parking brakes on these vehicles from 30 percent to 20 percent (46 FR 61887, Dec. 21, 1981). Such parking brakes are required to meet the standard's effort limit and gradient requirements, found in paragraphs S5.2(b) and S5.2.3, respectively. Paragraph S5.2(b) requires that the parking brake be capable of being engaged fully with a force applied to the control of not more than 150 pounds for a foot-operated system and not more than 125 pounds for a hand-operated system.
Received email where jack stated true emergency brakes 'MUST 'stop a vehicle in 517 ft on a straight, level road using only the e-brake'. And 'the vehicle must remain within the boundaries of a 12-ft-wide lane'; spinning in a tight circle while remaining on the road doesn't count. Ref 'Federal Motor Vehicle Stds #105 & #135'. Reg 571 part 393.52 in the text describes the test in excruciating detail.
StopTech's second Link 3900 dyno (they have three) entered service in February 2010 and has been used primarily for full-size truck testing, including drum brakes and armored vehicles, and for parking brake testing. Dyno #2 has also been configured to reach a maximum air velocity of 210mph and can simulate GVWs of up to 24,000 pounds. 
-------------- next part --------------
   The only manufactures of mechanical parking brakes I know of that meet
   NHTSA (National Highway Traffic Safety Administration) standards are
   Brembo, StopTech, and the standard Viper SRT-10 (Thanks to Mark Hoffman
   for bringing the Viper to my attention) and they all work about the
   same. The calipers along with the pads are free floating to allow the
   pads to always remain centered over the rotor, and the calipers are
   self- adjusting.

   Although NHTSA final rule extending Standard No. 105's parking brake
   requirements to multipurpose passenger vehicles, trucks, and buses with
   a GVWR of 10,000 pounds or less was published on January 2, 1981 (46FR
   55). Among other things, it required parking brakes on multipurpose
   passenger vehicles, trucks, and buses with a GVWR of 10,000 pounds or
   less to hold the vehicle stationary, in both forward and reverse
   directions, for five minutes on a 30 percent grade. In response to
   three petitions for reconsideration, the agency decided to change the
   gradient requirement for parking brakes on these vehicles from 30
   percent to 20 percent (46 FR 61887, Dec. 21, 1981). Such parking brakes
   are required to meet the standard's effort limit and gradient
   requirements, found in paragraphs S5.2(b) and S5.2.3, respectively.
   Paragraph S5.2(b) requires that the parking brake be capable of being
   engaged fully with a force applied to the control of not more than 150
   pounds for a foot-operated system and not more than 125 pounds for a
   hand-operated system.

   Received email where jack stated true emergency brakes 'MUST 'stop a
   vehicle in 517 ft on a straight, level road using only the e-brake'.
   And 'the vehicle must remain within the boundaries of a 12-ft-wide
   lane'; spinning in a tight circle while remaining on the road doesn't
   count. Ref 'Federal Motor Vehicle Stds #105 & #135'. Reg 571 part
   393.52 in the text describes the test in excruciating detail.

   StopTech's second Link 3900 dyno (they have three) entered service in
   February 2010 and has been used primarily for full-size truck testing,
   including drum brakes and armored vehicles, and for parking brake
   testing. Dyno #2 has also been configured to reach a maximum air
   velocity of 210mph and can simulate GVWs of up to 24,000 pounds.