Seeking San Diego Test Pilots
03-13-2009, 03:24 PM
#21
Banned
Thread Starter
Join Date: Mar 2009
Location: San Diego, CA
Posts: 5
Likes: 0
Received 0 Likes
on
0 Posts
The covers are made of 6061-T6 Aerospace Aluminum, it is the cover itself that draws the heat away. This article explain how heat sinks work: http://en.wikipedia.org/wiki/Heat_sink
03-13-2009, 09:30 PM
#23
TECH Enthusiast
iTrader: (9)
Join Date: Feb 2007
Location: Central PA
Posts: 512
Likes: 0
Received 0 Likes
on
0 Posts
But, they are not in physical contact with each other, and therefore, the thermal conductivity of the air between the caliper and cover must be considered.
Further, since brakes only get hot when turning motion into heat, there is air moving around the caliper body, providing a steady supply of cooler air. by putting the cover on it, you're trapping air between the cover and the caliper, raising the temperature of the air, which means the caliper will now stay warmer, since you've lessened the delta between the caliper temp and the surrounding air temp. The caliper cover cannot possibly provide enough heat flow between this warmed air and itself to provide a benefit over an unobstructed supply of fresh air.
Since you liked quoting the heat sink theory, consider that heat sinks work best when they contain a significantly larger amount of surface area than the object you're trying to cool. That's why in your computer, the heat sink will have many extruded "spikes", as just using a flat plate wouldn't work very well at all.. oh wait, the caliper covers are a flat plate...
My point is simple: If you want to market some kind of "appearance accessory", go for it. However, if you want to TRY and claim some sort of bogus performance improvement, you're gonna get called on it.
EDIT: I just watched your youtube so called "tests" - that is ridiculous. you're not even pointing the gun at the same spot on the calipers...
And no ***** are fake when they're in your hands.
Last edited by Eskimo; 03-13-2009 at 09:50 PM.
03-14-2009, 07:36 PM
#27
Eskimo has the right to say BS, it really is unless there is a composite material with a fan and spikes or "fins" to draw the heat away these won't work for that purpose. They look good if you want to put something on that is going to improve the looks of your car.
03-14-2009, 08:24 PM
#28
I agree with Eskimo here... It's a heat shield at best, not a heat sink.
These are fuel rail covers for your brakes. If you like the looks, then great, but it's not going to cool your brakes. If that's what you are after, get a set of brake ducts and route cool air from the front bumper to the cailper/rotor.
These are fuel rail covers for your brakes. If you like the looks, then great, but it's not going to cool your brakes. If that's what you are after, get a set of brake ducts and route cool air from the front bumper to the cailper/rotor.
03-15-2009, 10:00 AM
#29
Launching!
iTrader: (1)
Join Date: Dec 2001
Location: South of Heaven
Posts: 204
Likes: 0
Received 0 Likes
on
0 Posts
I agree with Eskimo here... It's a heat shield at best, not a heat sink.
These are fuel rail covers for your brakes. If you like the looks, then great, but it's not going to cool your brakes. If that's what you are after, get a set of brake ducts and route cool air from the front bumper to the cailper/rotor.
These are fuel rail covers for your brakes. If you like the looks, then great, but it's not going to cool your brakes. If that's what you are after, get a set of brake ducts and route cool air from the front bumper to the cailper/rotor.
these are form before function.
Brad
03-16-2009, 07:14 PM
#30
Banned
Thread Starter
Join Date: Mar 2009
Location: San Diego, CA
Posts: 5
Likes: 0
Received 0 Likes
on
0 Posts
05-13-2009, 03:43 PM
#31
Banned
Thread Starter
Join Date: Mar 2009
Location: San Diego, CA
Posts: 5
Likes: 0
Received 0 Likes
on
0 Posts
riiiight. Your theory might be somewhat valid in a vacuum, and even then, only if the caliper and the cover are in substantial physical contact with each other.
But, they are not in physical contact with each other, and therefore, the thermal conductivity of the air between the caliper and cover must be considered.
Further, since brakes only get hot when turning motion into heat, there is air moving around the caliper body, providing a steady supply of cooler air. by putting the cover on it, you're trapping air between the cover and the caliper, raising the temperature of the air, which means the caliper will now stay warmer, since you've lessened the delta between the caliper temp and the surrounding air temp. The caliper cover cannot possibly provide enough heat flow between this warmed air and itself to provide a benefit over an unobstructed supply of fresh air.
Since you liked quoting the heat sink theory, consider that heat sinks work best when they contain a significantly larger amount of surface area than the object you're trying to cool. That's why in your computer, the heat sink will have many extruded "spikes", as just using a flat plate wouldn't work very well at all.. oh wait, the caliper covers are a flat plate...
My point is simple: If you want to market some kind of "appearance accessory", go for it. However, if you want to TRY and claim some sort of bogus performance improvement, you're gonna get called on it.
EDIT: I just watched your youtube so called "tests" - that is ridiculous. you're not even pointing the gun at the same spot on the calipers...
And no ***** are fake when they're in your hands.
But, they are not in physical contact with each other, and therefore, the thermal conductivity of the air between the caliper and cover must be considered.
Further, since brakes only get hot when turning motion into heat, there is air moving around the caliper body, providing a steady supply of cooler air. by putting the cover on it, you're trapping air between the cover and the caliper, raising the temperature of the air, which means the caliper will now stay warmer, since you've lessened the delta between the caliper temp and the surrounding air temp. The caliper cover cannot possibly provide enough heat flow between this warmed air and itself to provide a benefit over an unobstructed supply of fresh air.
Since you liked quoting the heat sink theory, consider that heat sinks work best when they contain a significantly larger amount of surface area than the object you're trying to cool. That's why in your computer, the heat sink will have many extruded "spikes", as just using a flat plate wouldn't work very well at all.. oh wait, the caliper covers are a flat plate...
My point is simple: If you want to market some kind of "appearance accessory", go for it. However, if you want to TRY and claim some sort of bogus performance improvement, you're gonna get called on it.
EDIT: I just watched your youtube so called "tests" - that is ridiculous. you're not even pointing the gun at the same spot on the calipers...
And no ***** are fake when they're in your hands.
05-13-2009, 03:52 PM
#32
TECH Enthusiast
iTrader: (9)
Join Date: Feb 2007
Location: Central PA
Posts: 512
Likes: 0
Received 0 Likes
on
0 Posts
As I've stated since the beginning, I have NO issues with those buying them for looks. Taste is totally subjective. My issue was with your claim that they offer a performance benefit.
05-13-2009, 06:16 PM
#33
TECH Apprentice
iTrader: (6)
Join Date: Sep 2006
Location: UCLA
Posts: 330
Likes: 0
Received 0 Likes
on
0 Posts
riiiight. Your theory might be somewhat valid in a vacuum, and even then, only if the caliper and the cover are in substantial physical contact with each other.
But, they are not in physical contact with each other, and therefore, the thermal conductivity of the air between the caliper and cover must be considered.
Further, since brakes only get hot when turning motion into heat, there is air moving around the caliper body, providing a steady supply of cooler air. by putting the cover on it, you're trapping air between the cover and the caliper, raising the temperature of the air, which means the caliper will now stay warmer, since you've lessened the delta between the caliper temp and the surrounding air temp. The caliper cover cannot possibly provide enough heat flow between this warmed air and itself to provide a benefit over an unobstructed supply of fresh air.
Since you liked quoting the heat sink theory, consider that heat sinks work best when they contain a significantly larger amount of surface area than the object you're trying to cool. That's why in your computer, the heat sink will have many extruded "spikes", as just using a flat plate wouldn't work very well at all.. oh wait, the caliper covers are a flat plate...
My point is simple: If you want to market some kind of "appearance accessory", go for it. However, if you want to TRY and claim some sort of bogus performance improvement, you're gonna get called on it.
EDIT: I just watched your youtube so called "tests" - that is ridiculous. you're not even pointing the gun at the same spot on the calipers...
And no ***** are fake when they're in your hands.
But, they are not in physical contact with each other, and therefore, the thermal conductivity of the air between the caliper and cover must be considered.
Further, since brakes only get hot when turning motion into heat, there is air moving around the caliper body, providing a steady supply of cooler air. by putting the cover on it, you're trapping air between the cover and the caliper, raising the temperature of the air, which means the caliper will now stay warmer, since you've lessened the delta between the caliper temp and the surrounding air temp. The caliper cover cannot possibly provide enough heat flow between this warmed air and itself to provide a benefit over an unobstructed supply of fresh air.
Since you liked quoting the heat sink theory, consider that heat sinks work best when they contain a significantly larger amount of surface area than the object you're trying to cool. That's why in your computer, the heat sink will have many extruded "spikes", as just using a flat plate wouldn't work very well at all.. oh wait, the caliper covers are a flat plate...
My point is simple: If you want to market some kind of "appearance accessory", go for it. However, if you want to TRY and claim some sort of bogus performance improvement, you're gonna get called on it.
EDIT: I just watched your youtube so called "tests" - that is ridiculous. you're not even pointing the gun at the same spot on the calipers...
And no ***** are fake when they're in your hands.
Wow what is this, thermo 101? "Lessens the delta" lol at that.
That's an extremely bold claim for essentially zero analysis. Yes they've made a bold claim too but at least they have actually HAVE THE DAMN PRODUCT. You're looking at pictures and videos and basing some very important assumptions off of those.
This can't be treated like some cut and dry heat transfer textbook problem. How do you know the air gets trapped? Assuming it does how do you know the effects of that aren't negligible? How do you know the contact area isn't large enough to dissipate heat?
Look I'm not saying who's right and who's wrong I'm saying if you're gonna straight up deny the claims of a company you better have more evidence than the "delta being lessened."
05-28-2009, 07:30 PM
#34
Banned
Thread Starter
Join Date: Mar 2009
Location: San Diego, CA
Posts: 5
Likes: 0
Received 0 Likes
on
0 Posts
Need 94-97 F Body for Pictures in Catalog Since our last chat we have released the C4, C5 and C6 Corvette and the new Camaro, Pontiac G8 Caliper Covers. Next week we will have the Camaro/Firebird 1998-2002 are almost ready.
Our covers are going to be added to a Camaro catalog and need some pics. We need an fbody from 1994-1997 for picturs and as a test pilot. Please send me a PM if interested.
Our covers are going to be added to a Camaro catalog and need some pics. We need an fbody from 1994-1997 for picturs and as a test pilot. Please send me a PM if interested.
05-28-2009, 08:23 PM
#35
FormerVendor
iTrader: (18)
Join Date: Jan 2007
Location: Lost Angels, CA
Posts: 587
Likes: 0
Received 0 Likes
on
0 Posts
The corvette covers are in Stock and available at Auto Parts Firm as well BTW.
We will also be the first to have the Camaro covers as soon as they are ready.
I must say that Seeing them in person as an appearance mod, they do look nice and I am looking forward to less brake dust on the rims.
We will also be the first to have the Camaro covers as soon as they are ready.
I must say that Seeing them in person as an appearance mod, they do look nice and I am looking forward to less brake dust on the rims.
