How much clear road to bed in brakes - please check my work
Discussion
Hi,
Trying to figure out the best place to bed in my brakes (which I haven't fitted yet). The instructions say a series of 8 "near stops" from 60mph to 10 mph, accelerating immediately back to 60mph.
My assumptions and calculations are as follows (I suspect most of these are erring on the side of caution)
10mph - 60mph - 5 seconds
60mph - 10mph - 7 seconds
Thinking time at 10mph - 5 seconds
Thinking time at 60mph - 5 seconds
Average speed for the exercise 40mph
Each "near stop" is 22 seconds at an average speed of 40mph, during which time I will have travelled 0.244 miles
Therefore to do 8 "near stops" I will need 1.95 miles. This seems alot - have I made an error in my logic?
I think I can find somewhere, and at 4:30 in the morning I should have good visibility and not much traffic.
Trying to figure out the best place to bed in my brakes (which I haven't fitted yet). The instructions say a series of 8 "near stops" from 60mph to 10 mph, accelerating immediately back to 60mph.
My assumptions and calculations are as follows (I suspect most of these are erring on the side of caution)
10mph - 60mph - 5 seconds
60mph - 10mph - 7 seconds
Thinking time at 10mph - 5 seconds
Thinking time at 60mph - 5 seconds
Average speed for the exercise 40mph
Each "near stop" is 22 seconds at an average speed of 40mph, during which time I will have travelled 0.244 miles
Therefore to do 8 "near stops" I will need 1.95 miles. This seems alot - have I made an error in my logic?
I think I can find somewhere, and at 4:30 in the morning I should have good visibility and not much traffic.
I just use common sense and local country roads. All you’re trying to do is get the pads and discs hot, and a layer of pad material on the disc in an even coating. If they’re not smelly-hot on the last application, you’ve not gone hard enough.
Edited by Tony1963 on Monday 14th June 23:02
omniflow said:
Hi,
Trying to figure out the best place to bed in my brakes (which I haven't fitted yet). The instructions say a series of 8 "near stops" from 60mph to 10 mph, accelerating immediately back to 60mph.
My assumptions and calculations are as follows (I suspect most of these are erring on the side of caution)
10mph - 60mph - 5 seconds
60mph - 10mph - 7 seconds
Thinking time at 10mph - 5 seconds
Thinking time at 60mph - 5 seconds
Average speed for the exercise 40mph
Each "near stop" is 22 seconds at an average speed of 40mph, during which time I will have travelled 0.244 miles
Therefore to do 8 "near stops" I will need 1.95 miles. This seems alot - have I made an error in my logic?
I think I can find somewhere, and at 4:30 in the morning I should have good visibility and not much traffic.
You are overthinking this.Trying to figure out the best place to bed in my brakes (which I haven't fitted yet). The instructions say a series of 8 "near stops" from 60mph to 10 mph, accelerating immediately back to 60mph.
My assumptions and calculations are as follows (I suspect most of these are erring on the side of caution)
10mph - 60mph - 5 seconds
60mph - 10mph - 7 seconds
Thinking time at 10mph - 5 seconds
Thinking time at 60mph - 5 seconds
Average speed for the exercise 40mph
Each "near stop" is 22 seconds at an average speed of 40mph, during which time I will have travelled 0.244 miles
Therefore to do 8 "near stops" I will need 1.95 miles. This seems alot - have I made an error in my logic?
I think I can find somewhere, and at 4:30 in the morning I should have good visibility and not much traffic.
- yep, only a little bit.OP, just change them over and then take it for a run whilst expecting the first few presses of the brake to be a bit spongey as the pads bed in.
After that just carry on as normal.
If you're particularly concerned get the car out on a decent speed road and give it a few semi-hard brakes.
I am curious to which brand gives such specific bedding in advice.
Bedding in just needs to be a process of heating up, but not excessively, a few times and avoid any emergency style braking until a few heat cycles have been achieved.
On most cars, with most brands, it is unlikely to even need any specific bedding in, just sensible braking for around 150 miles of normal use.
Bedding in just needs to be a process of heating up, but not excessively, a few times and avoid any emergency style braking until a few heat cycles have been achieved.
On most cars, with most brands, it is unlikely to even need any specific bedding in, just sensible braking for around 150 miles of normal use.
Scrump said:
omniflow said:
Hi,
Trying to figure out the best place to bed in my brakes (which I haven't fitted yet). The instructions say a series of 8 "near stops" from 60mph to 10 mph, accelerating immediately back to 60mph.
My assumptions and calculations are as follows (I suspect most of these are erring on the side of caution)
10mph - 60mph - 5 seconds
60mph - 10mph - 7 seconds
Thinking time at 10mph - 5 seconds
Thinking time at 60mph - 5 seconds
Average speed for the exercise 40mph
Each "near stop" is 22 seconds at an average speed of 40mph, during which time I will have travelled 0.244 miles
Therefore to do 8 "near stops" I will need 1.95 miles. This seems alot - have I made an error in my logic?
I think I can find somewhere, and at 4:30 in the morning I should have good visibility and not much traffic.
You are overthinking this.Trying to figure out the best place to bed in my brakes (which I haven't fitted yet). The instructions say a series of 8 "near stops" from 60mph to 10 mph, accelerating immediately back to 60mph.
My assumptions and calculations are as follows (I suspect most of these are erring on the side of caution)
10mph - 60mph - 5 seconds
60mph - 10mph - 7 seconds
Thinking time at 10mph - 5 seconds
Thinking time at 60mph - 5 seconds
Average speed for the exercise 40mph
Each "near stop" is 22 seconds at an average speed of 40mph, during which time I will have travelled 0.244 miles
Therefore to do 8 "near stops" I will need 1.95 miles. This seems alot - have I made an error in my logic?
I think I can find somewhere, and at 4:30 in the morning I should have good visibility and not much traffic.
omniflow said:
have I made an error in my logic?
Yes, you've not allowed any time for using a calculator to count how many times you've been through the processI make it 10 seconds to grab a calculator and press the buttons to add 1
8 x 10 seconds should be added to the total time
Now here's the tricky bit. Although the total time needs 1 minute and 20 seconds adding to it, the distance travelled will remain close to the same as above if you stop the car to use the calculator.
If you use the calculator while driving, the distance will obviously increase and you may have to allow time for problems with the police if they see what you are up to
If you don't use a calculator you may forget where you are up to and have to start all over again
Something else to consider is that although 10 seconds has been allowed for each calculator entry, you may be fast fingered and manage it in 5
It's complicated
rustednut said:
I am curious to which brand gives such specific bedding in advice.
Bedding in just needs to be a process of heating up, but not excessively, a few times and avoid any emergency style braking until a few heat cycles have been achieved.
On most cars, with most brands, it is unlikely to even need any specific bedding in, just sensible braking for around 150 miles of normal use.
I'll (mostly) ignore the massively sarky posts, and answer this one. The pads and disks are from Formula Dynamics, and the bedding in advice they provide is exactly as outlined in the OP.Bedding in just needs to be a process of heating up, but not excessively, a few times and avoid any emergency style braking until a few heat cycles have been achieved.
On most cars, with most brands, it is unlikely to even need any specific bedding in, just sensible braking for around 150 miles of normal use.
For those who are being slightly unkind - I merely asked advice. It's not something I've ever done before. The disks and pads were relatively expensive and I want to make sure I get it right. I bow down to your superior knowledge and experience and apologise profusely for asking the question.
omniflow said:
rustednut said:
I am curious to which brand gives such specific bedding in advice.
Bedding in just needs to be a process of heating up, but not excessively, a few times and avoid any emergency style braking until a few heat cycles have been achieved.
On most cars, with most brands, it is unlikely to even need any specific bedding in, just sensible braking for around 150 miles of normal use.
I'll (mostly) ignore the massively sarky posts, and answer this one. The pads and disks are from Formula Dynamics, and the bedding in advice they provide is exactly as outlined in the OP.Bedding in just needs to be a process of heating up, but not excessively, a few times and avoid any emergency style braking until a few heat cycles have been achieved.
On most cars, with most brands, it is unlikely to even need any specific bedding in, just sensible braking for around 150 miles of normal use.
For those who are being slightly unkind - I merely asked advice. It's not something I've ever done before. The disks and pads were relatively expensive and I want to make sure I get it right. I bow down to your superior knowledge and experience and apologise profusely for asking the question.
Is it for road use or for track?
But exact speeds and amount of stops will not be critical, as long as a few repeated stops are done, to build up heat enough, so if in doubt just do a few extra stops if you cant get back up to speed and stop again repeatedly. Get the brakes warm by firm braking, and repeat, but not too hot too soon (emergency braking style).
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