Bedding in new discs and pads
Discussion
Depends on the pads some extent. Some of the whizzier race pads are a bit more specific such as Pagid - they describe a routine of a few medium speed brake phases (eg 60 to 20 or something similar) with brief cool down in between and then a few high speed braking stints (100 to 40 perhaps). Their website has it all from memory. Road pads are rather more forgiving as that routine above isn't really practical or legal!
However, when I've been track daying or racing we just went out and used them hard for a couple of laps and never had any issues. My experience is that it's not too precise a science and so long as you use them hard a few times on your first outing with them you will be fine. I've never had an issue. Using them hard does mean hard though, much harder than you'd normally brake on the road; think of it like a few emergency stops from 60mph and you'll be about right.
However, when I've been track daying or racing we just went out and used them hard for a couple of laps and never had any issues. My experience is that it's not too precise a science and so long as you use them hard a few times on your first outing with them you will be fine. I've never had an issue. Using them hard does mean hard though, much harder than you'd normally brake on the road; think of it like a few emergency stops from 60mph and you'll be about right.
I've just bedded in my GT4 pads and discs after the return from factory collection using the Brembo procedure from their website:
"Perform at least 20 brake applications using medium deceleration (approximately 60% of maximum) starting from 60mph and slowing to 20mph. Do not come to a stop. Accelerate back to the starting speed allowing 20-30 seconds before beginning the next brake application. After completion, drive the vehicle for at least 5 minutes with little or no braking in order to adequately cool the components.
When it can be done legally, or on a closed circuit, a secondary bedding operation is beneficial.
Repeat the above procedure for 5 to 10 brake applications increasing the starting speed to 80mph and increasing the deceleration rate to 80% of maximum. After completion, drive the vehicle for at least 10 minutes with little or no braking in order to adequately cool the components. The system is now ready for normal use.
This entire procedure must be complete before driving the vehicle as normal. It is especially important that this process is completed before any extended same-speed driving is done (i.e. Motorway travel). Failure to follow these instructions greatly increases the likelihood of judder development."
I didn't do this in Germany after leaving the factory and the car did suffer from very squeaky breaks after I had returned to the UK and the initial bite was poor. After bedding in, there is a decent uniform pad coating on the disc and there is no squeal and the bite is excellent. I can't recommend it enough, although you do need to find a quiet road with no traffic and the opportunity to cool them down afterwards.
"Perform at least 20 brake applications using medium deceleration (approximately 60% of maximum) starting from 60mph and slowing to 20mph. Do not come to a stop. Accelerate back to the starting speed allowing 20-30 seconds before beginning the next brake application. After completion, drive the vehicle for at least 5 minutes with little or no braking in order to adequately cool the components.
When it can be done legally, or on a closed circuit, a secondary bedding operation is beneficial.
Repeat the above procedure for 5 to 10 brake applications increasing the starting speed to 80mph and increasing the deceleration rate to 80% of maximum. After completion, drive the vehicle for at least 10 minutes with little or no braking in order to adequately cool the components. The system is now ready for normal use.
This entire procedure must be complete before driving the vehicle as normal. It is especially important that this process is completed before any extended same-speed driving is done (i.e. Motorway travel). Failure to follow these instructions greatly increases the likelihood of judder development."
I didn't do this in Germany after leaving the factory and the car did suffer from very squeaky breaks after I had returned to the UK and the initial bite was poor. After bedding in, there is a decent uniform pad coating on the disc and there is no squeal and the bite is excellent. I can't recommend it enough, although you do need to find a quiet road with no traffic and the opportunity to cool them down afterwards.
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