runout correction
Pro
Joined: Feb 2012
Posts: 577
Likes: 6
Very thin copper sheet stock can be bought at chain hardware stores. Use a punch to cut out your shims. I used to use leather hole punches and a large hammer. Don't try drilling through it as it'll wrinkle up every time.
Thread Starter
Instructor
Joined: Nov 2011
Posts: 228
Likes: 0
thanks both of ya
Race Director
Joined: Apr 2011
Posts: 11,183
Likes: 3,335
From: North of Toronto - Ontario
I've used everything from pop-cans, tinfoil, to proper brass or stainless steel shim stock.
There are some companies that make rotor shims, they are the correct size and have the stud holes punched in. They come in kits and are tapered. Lets say from .010 to .020, that would give you the .010 taper.
You measure the runout, mark the high spot and select the right one and put it in. Maintains full rotor contact since it's tapered and not just pads here and there.
Only used them once, buddy of mine worked at a place that had the kit so he got me the ones I needed.
I think they where Mitee or Mighty or something like that.
Now I just use pads around the studs, if you need .010" at one stud, try adding about .006" at the studs on each side. so it's not a total bridge across the spindle face/rotor
Mooser
EDIT
Found a link to P/N BA80309, Raybestos makes them, .003, .006 and .009 tapers. Look expensive, glad I got mine free when i did, shim stock looking better all the time
There are some companies that make rotor shims, they are the correct size and have the stud holes punched in. They come in kits and are tapered. Lets say from .010 to .020, that would give you the .010 taper.
You measure the runout, mark the high spot and select the right one and put it in. Maintains full rotor contact since it's tapered and not just pads here and there.
Only used them once, buddy of mine worked at a place that had the kit so he got me the ones I needed.
I think they where Mitee or Mighty or something like that.
Now I just use pads around the studs, if you need .010" at one stud, try adding about .006" at the studs on each side. so it's not a total bridge across the spindle face/rotor
Mooser
EDIT
Found a link to P/N BA80309, Raybestos makes them, .003, .006 and .009 tapers. Look expensive, glad I got mine free when i did, shim stock looking better all the time
Last edited by Mooser; Feb 10, 2012 at 10:39 PM. Reason: Found source
Race Director
Joined: Apr 2011
Posts: 11,183
Likes: 3,335
From: North of Toronto - Ontario
If you need to drill it, try clamping it tightly between two pieces of flat wood (3/4" plywood or a couple of pieces of hardwood type (laminate, etc) flooring) and then drill through the sandwich, works well if you don't have large enough punches
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