What pads? PBR MM, or PBR Ultimate?
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From: Temecula, Ca
What pads? PBR MM, or PBR Ultimate?
Need some opionions please? For 6MT, which pads? PBR Metal Masters or PBR Ultimates? I am looking for a good pad that reduces dust, but performs well? Thanks
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Joined: Dec 2003
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From: Marietta, Georgia
How much less than oem performance are you willing to accept. What coefficient of friction in cold weather is good enough for you and your insurance company?
Generally the ABS software [slip ratio set point] is the limit for improving but getting too far away from oem curves has downsides in initial bite and stopping distances from 60-80 mph in single cold stops.
But we are speaking in/of 10-15 maybe 20 feet at the worst [~~10%] ranges mostly in the 1st 0.5 second build up [friction] rate........when traveling 88 feet per second [60 mph] the critical time is the first 0.5 second ramp-up to full friction........oem is a special fast wearing blend to get the nth degree in this critical time frame....thus the dust.
Changing the friction curves vs. temperature front to rear is very tricky and aftermarkets don't test on individual cars.....they just slap their compounds on oem copied pad backing plates.......and hope for the best.
In US there is no spec nor test for aftermarket vs. Europe/Japan where the pads must NOW [very recently] be tested [to at least provide 80% of oem performance] to be acceptable -----thus great amount of EXPORT DUMPING into US/Canada/England and other 3rd world now.
Generally the ABS software [slip ratio set point] is the limit for improving but getting too far away from oem curves has downsides in initial bite and stopping distances from 60-80 mph in single cold stops.
But we are speaking in/of 10-15 maybe 20 feet at the worst [~~10%] ranges mostly in the 1st 0.5 second build up [friction] rate........when traveling 88 feet per second [60 mph] the critical time is the first 0.5 second ramp-up to full friction........oem is a special fast wearing blend to get the nth degree in this critical time frame....thus the dust.
Changing the friction curves vs. temperature front to rear is very tricky and aftermarkets don't test on individual cars.....they just slap their compounds on oem copied pad backing plates.......and hope for the best.
In US there is no spec nor test for aftermarket vs. Europe/Japan where the pads must NOW [very recently] be tested [to at least provide 80% of oem performance] to be acceptable -----thus great amount of EXPORT DUMPING into US/Canada/England and other 3rd world now.
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Joined: Dec 2003
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From: Temecula, Ca
Originally Posted by Q45tech
How much less than oem performance are you willing to accept. What coefficient of friction in cold weather is good enough for you and your insurance company?
Generally the ABS software [slip ratio set point] is the limit for improving but getting too far away from oem curves has downsides in initial bite and stopping distances from 60-80 mph in single cold stops.
But we are speaking in/of 10-15 maybe 20 feet at the worst [~~10%] ranges mostly in the 1st 0.5 second build up [friction] rate........when traveling 88 feet per second [60 mph] the critical time is the first 0.5 second ramp-up to full friction........oem is a special fast wearing blend to get the nth degree in this critical time frame....thus the dust.
Changing the friction curves vs. temperature front to rear is very tricky and aftermarkets don't test on individual cars.....they just slap their compounds on oem copied pad backing plates.......and hope for the best.
In US there is no spec nor test for aftermarket vs. Europe/Japan where the pads must NOW [very recently] be tested [to at least provide 80% of oem performance] to be acceptable -----thus great amount of EXPORT DUMPING into US/Canada/England and other 3rd world now.
Generally the ABS software [slip ratio set point] is the limit for improving but getting too far away from oem curves has downsides in initial bite and stopping distances from 60-80 mph in single cold stops.
But we are speaking in/of 10-15 maybe 20 feet at the worst [~~10%] ranges mostly in the 1st 0.5 second build up [friction] rate........when traveling 88 feet per second [60 mph] the critical time is the first 0.5 second ramp-up to full friction........oem is a special fast wearing blend to get the nth degree in this critical time frame....thus the dust.
Changing the friction curves vs. temperature front to rear is very tricky and aftermarkets don't test on individual cars.....they just slap their compounds on oem copied pad backing plates.......and hope for the best.
In US there is no spec nor test for aftermarket vs. Europe/Japan where the pads must NOW [very recently] be tested [to at least provide 80% of oem performance] to be acceptable -----thus great amount of EXPORT DUMPING into US/Canada/England and other 3rd world now.
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