Wilwood Rotors toast?
#1
Wilwood Rotors toast?
I'm not knowledgeable on "reading" a rotor that has seen track duty, thought I'd get some opinions on this. I noticed on my last HPDE increased pedal pressure required to slow the car down. It's the goodwin Wilwood 11" kit with polymatrix pads (not 100% on which letter). So I inspected my rotors and they don't look quite right to me. Lots of inconsistent markings, and some light surface cracks. They don't have any noticeable lip or anything that would make me thing they are worn, did I manage to cook them? I've always given them a cool down lap.
#4
those rotors have seen some heat. the rules for when it's time to replace a rotor.
1. if you go past minimum thickness.
2. If you can fit your fingernail inside a crack
3 if you have a crack starting at the edge of the rotor.
the blue tint you see is transfer layer from the pad. that will develop cracks and it's nothing to worry about. once you see the iron splitting apart it's time to switch.
1. if you go past minimum thickness.
2. If you can fit your fingernail inside a crack
3 if you have a crack starting at the edge of the rotor.
the blue tint you see is transfer layer from the pad. that will develop cracks and it's nothing to worry about. once you see the iron splitting apart it's time to switch.
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#5
those rotors have seen some heat. the rules for when it's time to replace a rotor.
1. if you go past minimum thickness.
2. If you can fit your fingernail inside a crack
3 if you have a crack starting at the edge of the rotor.
the blue tint you see is transfer layer from the pad. that will develop cracks and it's nothing to worry about. once you see the iron splitting apart it's time to switch.
1. if you go past minimum thickness.
2. If you can fit your fingernail inside a crack
3 if you have a crack starting at the edge of the rotor.
the blue tint you see is transfer layer from the pad. that will develop cracks and it's nothing to worry about. once you see the iron splitting apart it's time to switch.
#6
i'm a big fan of the V8 roadsters 11.75" kit. but that's just me
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703.430.3303
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#8
true. they use a 8x7 bolt pattern (same rotor as 90% of circle track cars). so when you burn up the $40 rotors( won't take too long) you can find quality rotors that will last. for example i'm on PFC rotors. i'm on year 5 with the same rotors. mind you i have 500hp, and do 15 track events a year. my pfc rotors have out lasted a set of dynalight calipers lol.
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#9
true. they use a 8x7 bolt pattern (same rotor as 90% of circle track cars). so when you burn up the $40 rotors( won't take too long) you can find quality rotors that will last. for example i'm on PFC rotors. i'm on year 5 with the same rotors. mind you i have 500hp, and do 15 track events a year. my pfc rotors have out lasted a set of dynalight calipers lol.
#12
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As Johnny (OGRacing) said, those very fine cracks are normal and not cause for alarm. Check your rotor thickness with a caliper (the tool not the brake components) to get a feel for how far through their usable lifespan they are. You're probably not even half way through.
On a separate note regarding heat, you may also be using the wrong pad for track use, which will contribute significantly to putting more heat into your rotors than if you use higher torque pads intended for track use.
Polymatrix is a whole line of pads from Wilwood of varying compounds. What is the letter designation for your pads?
-Ryan
On a separate note regarding heat, you may also be using the wrong pad for track use, which will contribute significantly to putting more heat into your rotors than if you use higher torque pads intended for track use.
Polymatrix is a whole line of pads from Wilwood of varying compounds. What is the letter designation for your pads?
-Ryan
#13
You're may also be using the wrong pad for track use, which will contribute significantly to putting more heat into your rotors than if you use higher torque pads intended for track use.
Polymatrix is a whole line of pads from Wilwood of varying compounds. What is the letter designation for your pads?
-Ryan
Polymatrix is a whole line of pads from Wilwood of varying compounds. What is the letter designation for your pads?
-Ryan
#14
As Johnny (OGRacing) said, those very fine cracks are normal and not cause for alarm. Check your rotor thickness with a caliper (the tool not the brake components) to get a feel for how far through their usable lifespan they are. You're probably not even half way through....
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WWW.OGRACING.COM
800.934.9112
703.430.3303
info@ogracing.com
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WWW.OGRACING.COM
800.934.9112
703.430.3303
info@ogracing.com
#15
As Johnny (OGRacing) said, those very fine cracks are normal and not cause for alarm. Check your rotor thickness with a caliper (the tool not the brake components) to get a feel for how far through their usable lifespan they are. You're probably not even half way through.
On a separate note regarding heat, you may also be using the wrong pad for track use, which will contribute significantly to putting more heat into your rotors than if you use higher torque pads intended for track use.
Polymatrix is a whole line of pads from Wilwood of varying compounds. What is the letter designation for your pads?
-Ryan
On a separate note regarding heat, you may also be using the wrong pad for track use, which will contribute significantly to putting more heat into your rotors than if you use higher torque pads intended for track use.
Polymatrix is a whole line of pads from Wilwood of varying compounds. What is the letter designation for your pads?
-Ryan
#16
I agree that I am likely not near the end of the lifespan in terms of thickness (I'll measure to confirm). Should I be worried about the inconsistent marking on the rotor? Would it be worthwhile to clean them up a little with some fine steel wool or should I just let them be? Sorry again for all the questions, I don't want to cut corners or make assumptions on something as important as brakes.
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800.934.9112
703.430.3303
info@ogracing.com
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WWW.OGRACING.COM
800.934.9112
703.430.3303
info@ogracing.com
#17
true. they use a 8x7 bolt pattern (same rotor as 90% of circle track cars). so when you burn up the $40 rotors( won't take too long) you can find quality rotors that will last. for example i'm on PFC rotors. i'm on year 5 with the same rotors. mind you i have 500hp, and do 15 track events a year. my pfc rotors have out lasted a set of dynalight calipers lol.
#18
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299.20.0045.01 & 299.20.0045.02
Performance Friction Slotted Replacement Rotor - Late Model, Modified
Blank:
299.20.0045.11 & 299.20.0045.12
Performance Friction Replacement Rotor - Late Model, Modified
Note that I don't believe the P/N is correct on the OGRacing site for the slotted rotors - it's listed as the same P/N as the blank rotors, but it's an 01/02 designation at the end for the slotted rotors.
-Ryan