Rotor to pad

[bavaria911]

Question: Do Zimmermann cross drilled rotors and regular Padig pads work together?

Scott

[icarp]

In general yes
If you would like to have a good braking experience i recommend you run the
Porterfield R4S pads

[bavaria911]

I’ll see if they fit the 1970 911S Alloy front calipers and rear M iron stock calipers.

[icarp]

The best way to understand what pad for what car is here
https://www.pmbperformance.com/911brake.html
Ian

[Mike Andrew]

Just installed rotors and Porterfield R 4 S pads. Cannot wait to get on the road once my fan returns from Tru 6.
Bedding suggestions???

[icarp]

I like to think of the brake pedal as a " SPEED REGULATOR"

Braking is an art unto itself , The best braking technique slows the car just the right amount , in a reasonable amount of space . Not always the shortest amount of space .
One of my favorite mantras is to brake , " longer, softer, slower "
This means , longer distance with the brakes on , softer on the pedal pressure , and slower for the entry speed . If you have a passenger in the car , see if you can apply the brakes without them knowing when you touch the pedal , know you are slowing, and not know when the pedal is released . Good braking drills .

So far as bedding pads and rotors . Try to imagine baking a cake with a flame cutting torch. It can be done , you have plenty of heat . Think of the heat as the speed of the car as one of the temp settings , the pressure of the brake pedal as another , and the time spent on the pedal another .
The idea is to get the pad and the rotor up to full operating temp with out burning any of the parts.

The parts just like the cake need to be fully heated . The process is the key
If you aim the torch at the cake to close and too long well there will be a hot spot and most likely burn all of the parts including the pan . The same will happen withe the brake rotor and pad . This is called glazing

The temp of the pads and the rotor need to come up to temp together , soft pressure ,
medium speed , this will create a good initial temp , but not enough to bake all the parts to the done point . So more speed , light brakes , longer time on the pedal , higher pressure for a short time, 40 mph up to 80 mph is a good range . Towards the end of the bedding, run the speed up to 80 then slow all the way down to 20 or less. that will get everything very hot.
All this for ten to fifteen minutes you should smell the brakes , some pads will even be on fire !
So what , no big deal. That is just the glue burning off of the pad . Massive braking efforts are not needed or prescribed in the bedding procedure . Then drive for 5 minutes avoiding the brakes as much as you can .
Park the car, some people like to turn the steering wheel hard right then left to knock the pads back a bit from the rotor.

With all that being said, most street pads do not need a bedding procedure Just think about brining them up to about 500-600 degrees instead of 900-1100 *

You will do just fine with any system of bedding pads for the street , just keep it methodical and get the temps up. New pads and new rotors like to be bedded as well.

Ian

[Mike Andrew]

Thanks, Ian.

Basically bed them like any other brand of pads. That I can do.

Looking forward to some improved braking once they're bedded

[bavaria911]

Thanks Ian, great information to think about.

Scott

[Noah930]

Originally Posted by icarp

I like to think of the brake pedal as a " SPEED REGULATOR"

Braking is an art unto itself , The best braking technique slows the car just the right amount , in a reasonable amount of space . Not always the shortest amount of space .
One of my favorite mantras is to brake , " longer, softer, slower "
This means , longer distance with the brakes on , softer on the pedal pressure , and slower for the entry speed . If you have a passenger in the car , see if you can apply the brakes without them knowing when you touch the pedal , know you are slowing, and not know when the pedal is released . Good braking drills .

We're not driving Grey Poupon stretch limos here. We're driving Porsches fer chrissakes.