| Re: [GMCnet] Brake temps with infrared scope [message #314282] |
Wed, 08 March 2017 11:31  |
James Hupy
Messages: 6806
Registered: May 2010
Karma:
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Senior Member |
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Your coach, just sitting still in the Texas sun, could reach 100° over
ambient outside temperatures. So, sitting still on a 90° day, tires and
wheel Temps could easily be 190°, before any heat gain from braking and
rolling forces. I would say that 200 - 225° might be considered "normal" on
the sunny side of your coach in Texas. In Oregon, on a rainy, cloudy 60°
day, that might be a bit high, and would require looking at more
frequently. So, when I say "it depends", that is the basis for my comment.
Certainly, any Temps measured at the rotors or drums in excess of 260° in
use should be an indication of excessive heating. You will see this temp,
but not just rolling along in flat country and not stop and go. Descending
the Rockies, or Cascades, heavy braking, you will see over 300° for short
periods. Kinda makes your butt pucker, don't it?
Jim Hupy
Salem, Or
78 GMC ROYALE 403
On Mar 8, 2017 9:03 AM, "Scott Nutter" wrote:
I am going to start documenting all my brake temps with the infrared gun
now that everything is new there.
Previously I would judge temps by feeling the heat with my hand on the rims.
Where would be the exact correct place on the rims or drums to get the most
correct temp values?
And roughly, what should those values be? It is a stock brake system with
80mm calipers up front.
Thanks, Scott
--
Scott Nutter
1978 455 Royale Center Kitchen, Quad bags.
Houston, Texas
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