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Brake Drum Temps - Field Testing

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T

Tinster

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It was a beautiful day here on the island and since
I have just adjusted my rear brakes I thought some
amateur field testing might be fun.

Data Points:
Ambient air temp 78*F
TRF rear brake pads 1800 miles use
TRF pads adjusted less than 100 miles ago.
TRF rear brake hoses 1800 miles use
TRF brake Master cylinder 2500 miles use
TRF rear brake wheel cylinders 2500 miles use
Brake fluid 2500 miles use
Brake drums painted with 1300*F ceramic rattlecan
Ambient brake drum temp in garage 78*F
Raytheon infrared temp gun - 18 months use

<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<

Expressway- tapped the brakes a few times to warm them up.
1. 70 MPH w/ panic brake to shoulder. Wheels NOT locked up.
Brake drum at 108*F

2. Continued to 60 mph for a few minutes; panic brake to shoulder, wheels NOT locked up. Brake drum at 99*F.

3. Continued to 60 mph for a few minutes; panic brake to shoulder, wheels NOT locked up. Brake drum at 97*F.

4. Continued to 75 mph for a minute; panic brake to shoulder, wheels partially locked up. Brake drum at 118*F.

5. Pulled into the Biker bar for a tall, cold one.
Normal braking from 50 mph to parking lot. Brake drum at 97*F

I also noticed the brake drum cools down quickly was well.
The system appears to be designed to stop and shed heat as well.

Amateur data - take it for what it's worth.

dale

Drum-Temps.jpg
 
I think you may be taking this too seriously Dale. Just make sure you have a complete brake system parts supply in the trunk, as well as the tools to replace them and you will be fine.
 
Gad... if it stops without pulling to one side or the other and doesn't SMOKE after ONE "panic" stop the brakes are fine!!

..and rear brakes on that lump have SHOES not ~pads~ for stopin' it. PUSH friction rather than clamps. Go get that book and read summmore, Dale. :laugh:
 
Not my thread Doc!!

Someone recently asked about rear brake drum temps
during hard breaking. I supplied the data.

My car stops on cue and straight, that's all I care about.

the test data was for others who asked for it.

d
 
Ahhh... my bad. What I get for not bein' here more.

Your data is "textbook" normal, BTW.
 
As per the other thread...rattle can spray the drums with off the shelf high temp in the color of your choice, they rarely get that hot unless 1. You are racing 2. You drive with the emergency brake on (alot) 3. You live at the top of Pikes Peak....
 
I use kids water color. easier to change the color that way.
 
But it gets flakey. :jester:
 
The scientific method in action. Thanks, Tinster. I was the one who asked for the brake drum temps. I am actually working on a Bugeye and a TR6 at the moment. I am going to try high temp engine paint on the TR6 drums and powder coat on the front and rear brake drums on the Bug to see how they hold up. I did contact Eastwood technical support that said the standard powdercoat paint will work fine. I'll let you know how they do after I do some driving.
 
I have used plain old Rust Oleum paint of a number of brake drums, no issues with heat and paint even after many 1000 miles of spirited driving. No racing though.
 
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