[C2] Front brake calipers....what am I missing here???
11-28-2018, 01:54 PM
#41
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What do those rotors measure? They look very thick. You have aftermarket hubs as well, which I would verify dimensionally every way I could against an OE hub. Would be very easy to have a machining error on those parts. Do those hubs use the 69+ later larger taper bearings?
You are going to want to check lateral runout of the rotors with all the play taken out of the bearings before you go forward anyway. Spec is 0.002" I believe.
You are going to want to check lateral runout of the rotors with all the play taken out of the bearings before you go forward anyway. Spec is 0.002" I believe.
11-28-2018, 03:46 PM
#42
Le Mans Master
Thread Starter
Dumb question....is the bottom of the caliper bracket supposed to go BETWEEN the back of the spindle and the steering arm? Anyone have a picture of the back of their spindle showing the bracket-steering arm-spindle relationship?
11-28-2018, 04:04 PM
#43
11-28-2018, 04:21 PM
#44
Le Mans Master
Thread Starter
Yup, thanks...Ive got everything installed “correctly” 
11-28-2018, 04:36 PM
#45
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Boy, I just can’t picture what your problem could be. Do you have similar interference on both sides of the caliper? I can certainly share your frustration.
Do you still have your old calipers? Would be interesting to throw one on and see if it is centered.
Do you still have your old calipers? Would be interesting to throw one on and see if it is centered.
Last edited by 69ttop502; 11-28-2018 at 04:37 PM.
11-28-2018, 04:39 PM
#46
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I believe these calipers are interchangeable (not side specific), so either the hub, the rotor or the bracket are incorrect. What hub are you using?
It shouldn’t come to this, but you can shim the rotor. You MUST use hardened shims that are precision ground, not regular washers.
It shouldn’t come to this, but you can shim the rotor. You MUST use hardened shims that are precision ground, not regular washers.
Last edited by Factoid; 11-28-2018 at 04:41 PM.
11-28-2018, 06:53 PM
#47
I installed the wilwood calipers using my old pads and rotors first without any noticeable difficulties (more tolerance from their wear). However on phase two of the upgrade where I installed stock sized 11.75" diameter 1.25" thick two piece rotors with the new matrix pads that wilwood supplied with the calipers, I had to shim the calipers outboard about .060" and problem solved for me. If I didnt shim the calipers on their two mounting points, the wheels would not spin freely and the brakes would be dragging. My car uses the stock'65 spindles , hubs and caliper brackets. Perhaps go to the hardware store and experiment with some grade 8 washers of verifying thickness if yours need to be shimmed. You can then order the correct stainless steel shims from amazon.
hope I didn't miss your exact needs I sporatically read through the thread.
hope I didn't miss your exact needs I sporatically read through the thread.
11-28-2018, 07:43 PM
#48
Race Director
11-28-2018, 08:17 PM
#49
This is long shot but I didn't see a picture of the front of the rotor. There is a difference in rotor offset between front to rear. This offset will move rotor about 0.10 toward car centerline. If you got all 4 rotors be sure you've got the fronts on the front. Rears have two extra holes on the mounting face.
11-28-2018, 08:19 PM
#50
Le Mans Master
Thread Starter
Same interference in the same direction on both sides. This is a '64, so it was originally drum brakes....no "original" calipers and discs to throw back to on check with.
11-28-2018, 08:21 PM
#51
Le Mans Master
Thread Starter
I believe these calipers are interchangeable (not side specific), so either the hub, the rotor or the bracket are incorrect. What hub are you using?
It shouldn’t come to this, but you can shim the rotor. You MUST use hardened shims that are precision ground, not regular washers.
It shouldn’t come to this, but you can shim the rotor. You MUST use hardened shims that are precision ground, not regular washers.
Last edited by FLYNAVY30; 11-28-2018 at 09:20 PM.
11-28-2018, 08:22 PM
#52
Le Mans Master
Thread Starter
This is long shot but I didn't see a picture of the front of the rotor. There is a difference in rotor offset between front to rear. This offset will move rotor about 0.10 toward car centerline. If you got all 4 rotors be sure you've got the fronts on the front. Rears have two extra holes on the mounting face.
11-28-2018, 08:24 PM
#53
Le Mans Master
Thread Starter
I installed the wilwood calipers using my old pads and rotors first without any noticeable difficulties (more tolerance from their wear). However on phase two of the upgrade where I installed stock sized 11.75" diameter 1.25" thick two piece rotors with the new matrix pads that wilwood supplied with the calipers, I had to shim the calipers outboard about .060" and problem solved for me. If I didnt shim the calipers on their two mounting points, the wheels would not spin freely and the brakes would be dragging. My car uses the stock'65 spindles , hubs and caliper brackets. Perhaps go to the hardware store and experiment with some grade 8 washers of verifying thickness if yours need to be shimmed. You can then order the correct stainless steel shims from amazon.
hope I didn't miss your exact needs I sporatically read through the thread.
hope I didn't miss your exact needs I sporatically read through the thread.
11-28-2018, 09:20 PM
#55
Le Mans Master
Thread Starter
1.25 inch thickness
2.75 inch from mounting surface that contacts the hub to the inner face of the rotor
3.125 inch overall thickness from outside face of the hat to the inner face of the rotor
11-28-2018, 09:47 PM
#56
The .375 mounting surface thickness is in spec for a front rotor. The rear rotor is about 0.10 thinner. So the rotor is OK.
I don't have dimensions for the hub but if it's out of spec it could cause your problem
I don't have dimensions for the hub but if it's out of spec it could cause your problem
11-28-2018, 10:10 PM
#57
Hope this will help, the gap between my rotor and the large bolt is about 0.285. If your gap is in the ball park then the hub/rotor assy should be ok and the problem is in caliper bracket/caliper.
11-28-2018, 10:20 PM
#58
Le Mans Master
Thread Starter
Thanks for the help Grampy, Ill take a look at that measurement tomorrow and see where mine sits.
11-29-2018, 09:13 AM
#59
Le Mans Master
Thread Starter
Ill have to pull the rotor off and get some clay in there tonight to get an exact measurement, but my uncalibrated eyeball says thats less than 3-tenths....ive got a straight edge on the bolt in the pic just as a reference. I agree that this indicates the spindle/hub/disc relationship is correct and its clearly an issue with the caliper or caliper bracket
11-29-2018, 09:24 AM
#60
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Greg, I think you just determined that your bracket is the guilty party.