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Old 04-18-2005, 10:49 PM   #1
Papa_Gorgio
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Member#: 20176
Join Date: Jun 2002
Location: NJ
Vehicle:
2002 WRX Wagon
WR Blue

Default When to machine the rotors?

Haven't changed the breaks since I bought the car, I have an 02 wagon. I can feel a big decrease in stopping power from when I bought it new.

I got 2 qoutes from STS and Bridgestone service centers. To my surprise, they both said around 350 if I need to cut the rotors.

Maybe I can change the pads myself and save some money, but how do I know if I need to cut the rotors? And what pads should I use for normal street driving?

Any advice would help as I need to get this done before my Friday trip.

thanks in advance
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Old 04-19-2005, 12:32 AM   #2
eltrouble
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5 doors > 4 doors

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measure thickness with a micrometer, measure runout with a dial indicator.

if it's more than OEM spec then you have to turn them.
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Old 04-19-2005, 07:12 AM   #3
DrD
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are the pads worn out? you really shouldn't feel any significant dropoff in braking performance as the pads wear - as long as they still have enough meat on them, they are fine. One thing to check - have you bled the brakes recently? If not, you should replace the brake fluid (flush the system) - any air in the system will make the pedal feel squishy and seem like braking performance has dropped off.

Actually - if you do replace the pads, and you get something like the OEM ones, you will notice a reduction in stopping power (well - more force required on the pedal) since the pads are chamfered and you will have a smaller pad to rotor contact area (significantly smaller) until they wear down through the chamfer.
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Old 04-19-2005, 07:44 AM   #4
infantsam
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Why would you spend money and time fixing things that have little life left.....if you have less than 30% pads left I would replalce them - they are able to absorb much less heat as they get thin....

I'd bet your rotors are fine.....garnett paper until your arm hurts, new pads that fit your driving style, flush and bleed system....that should do it.
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Old 04-19-2005, 11:44 AM   #5
cdvma
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I wouldn't turn a rotor, ever. If you already beat your rotor to the point that it needs to be turned, its done. Brembo blanks are like $50 or you can go and get rotors at your local Auto Zone for less than $20 each.
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Old 04-19-2005, 11:56 AM   #6
infantsam
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Quote:
Originally Posted by cdvma
I wouldn't turn a rotor, ever. If you already beat your rotor to the point that it needs to be turned, its done. Brembo blanks are like $50 or you can go and get rotors at your local Auto Zone for less than $20 each.
I actually agree w/ that -

But I'd pay the 60 bucks for the OEM ones...

They are made by Mountain - a very good rotor manufacturer in Japan...

Cheap aftermarket iron from china sucks ass - and you drive a fast car not a pos honda
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Old 04-19-2005, 03:17 PM   #7
eltrouble
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if you've got the cash, get the STi 4/2-pot brakes

that's what i'm planning to do anyways. i've never really been satisfied with stock WRX braking power
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