Brake Discs

willy3000 · 09-01-2012, 09:23 PM

hi

im changing my brakes soon, just wondering if i have to change my brake discs as well? or can i just machine it down? if so how many times is it recommended to machine down for a brake disc?

thanks

Stinger9 · 09-01-2012, 09:27 PM

Rotors should be replaced with every pad change.
Plain quality rotors are the best and cheapest.
Start with www.Turnermotorsport.com

Axxis Metal Masters highly recommended by them.
I got'em. love 'em.

dwtaylorpdx · 09-01-2012, 09:35 PM

I go through about 3 sets of pads per rotor. I never machine/turn them. I change the pads at 75%.
Rotors get changed when they are worn about 50% of their allowance or are showing surface checking.
If you change the pads more often, the rotors wear less. I always break fresh rotors in with seasoned
pads never new. I keep a 50% set in the shop just for breaking in the rotors (Hawk Blues)
They go on the car for a hour or two to burnish the surface then I put the new pads on and go break them in.

Just breaking all the rules...

Dave

Stinger9 · 09-01-2012, 09:42 PM

Let me know when you're coming.

I'm getting out of your way!!

dwtaylorpdx · 09-01-2012, 09:48 PM

Its a track thing you wouldn't understand.....

Its pretty logical, replace the rotor when it needs replaced.
Replace the pads early so you don't overheat the pad and cook the rotor..

I learned this maintaining cars that break 160 at the track...
The changing rotors and pads as a set thing is a marketing hype dealer pull to take your money....

I dont do it blindly, the rotors get a dial indicator across the surface and I check for run-out and ripple each pad change.
Dave

Stinger9 · 09-01-2012, 09:50 PM

Works for you, OK by me.

See you at NASCAR

Reading your post #7, in my lifetime I'll never come close to catching up to your automotive experiences.
Good times!

dwtaylorpdx · 09-01-2012, 10:05 PM

Nope.. Well OK I do maintain a couple sprint cars and a cosworth midget, but that's dirt not pavement. lol
I also handle a 200SX tubo, a 5.0 Mustang, 2 sentra school cars, a ACR neon, and help out on a variety of other road race cars...

Fastest car I ever worked the suspension on was a Z-07 comp corvette. clocked it at about 175 on the front straight at PIR (Portland International)

Cheers
Dave

09-01-2012, 09:23 PM	#1
willy3000 Registered User Join Date: Aug 2011 Location: Sydney, Australia Posts: 272 My Ride: BMW 2001 E46 320ci View My Garage	Brake Discs hi im changing my brakes soon, just wondering if i have to change my brake discs as well? or can i just machine it down? if so how many times is it recommended to machine down for a brake disc? thanks

09-01-2012, 09:48 PM	#5
dwtaylorpdx Registered User Join Date: Jul 2011 Location: PDX Posts: 176 My Ride: 2005 330xi View My Garage	Its a track thing you wouldn't understand..... Its pretty logical, replace the rotor when it needs replaced. Replace the pads early so you don't overheat the pad and cook the rotor.. I learned this maintaining cars that break 160 at the track... The changing rotors and pads as a set thing is a marketing hype dealer pull to take your money.... I dont do it blindly, the rotors get a dial indicator across the surface and I check for run-out and ripple each pad change. Dave Last edited by dwtaylorpdx; 09-01-2012 at 09:51 PM.

09-01-2012, 09:50 PM	#6
Stinger9 Registered User Join Date: Sep 2011 Location: New York Posts: 5,524 My Ride: '04 330Ci View My Garage	Works for you, OK by me. See you at NASCAR Reading your post #7, in my lifetime I'll never come close to catching up to your automotive experiences. Good times! Last edited by Stinger9; 09-01-2012 at 10:50 PM.

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search
Display Modes	Rate This Thread
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode	Rate This Thread:

09-01-2012, 09:27 PM	#2
Stinger9 Registered User Join Date: Sep 2011 Location: New York Posts: 5,524 My Ride: '04 330Ci View My Garage	Rotors should be replaced with every pad change. Plain quality rotors are the best and cheapest. Start with www.Turnermotorsport.com Axxis Metal Masters highly recommended by them. I got'em. love 'em.

09-01-2012, 09:35 PM	#3
dwtaylorpdx Registered User Join Date: Jul 2011 Location: PDX Posts: 176 My Ride: 2005 330xi View My Garage	I go through about 3 sets of pads per rotor. I never machine/turn them. I change the pads at 75%. Rotors get changed when they are worn about 50% of their allowance or are showing surface checking. If you change the pads more often, the rotors wear less. I always break fresh rotors in with seasoned pads never new. I keep a 50% set in the shop just for breaking in the rotors (Hawk Blues) They go on the car for a hour or two to burnish the surface then I put the new pads on and go break them in. Just breaking all the rules... Dave

09-01-2012, 09:42 PM	#4
Stinger9 Registered User Join Date: Sep 2011 Location: New York Posts: 5,524 My Ride: '04 330Ci View My Garage	Let me know when you're coming. I'm getting out of your way!!

09-01-2012, 10:05 PM	#7
dwtaylorpdx Registered User Join Date: Jul 2011 Location: PDX Posts: 176 My Ride: 2005 330xi View My Garage	Nope.. Well OK I do maintain a couple sprint cars and a cosworth midget, but that's dirt not pavement. lol I also handle a 200SX tubo, a 5.0 Mustang, 2 sentra school cars, a ACR neon, and help out on a variety of other road race cars... Fastest car I ever worked the suspension on was a Z-07 comp corvette. clocked it at about 175 on the front straight at PIR (Portland International) Cheers Dave