931/937/944 Brake cooling ducts
03-19-2003 | 12:57 PM
#1
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From: Lenexa, KS
931/937/944 Brake cooling ducts
I got this picture out of another thread "924 wagon" It shows brake cooling ducts on a 931/937.
<img src="http://boards.rennlist.com/upload/bremskuehl2.jpg" alt=" - " />
Couple of questions;
1) Are those brake cooling ducts available somewhere?
2) Will they fit an early 944 (mine was built in March of '82)
<img src="http://boards.rennlist.com/upload/bremskuehl2.jpg" alt=" - " />
Couple of questions;
1) Are those brake cooling ducts available somewhere?
2) Will they fit an early 944 (mine was built in March of '82)
03-19-2003 | 02:27 PM
#2
Burning Brakes
Joined: Dec 2001
Posts: 938
Likes: 6
From: Northern Virginia
HY,
OG Racing sells brake ducts for 944s that seem to work pretty well.
The kit includes the duct, hoses, and a backing plate replaces the current splash shield. The hose attaches to the new backing plate which directs air directly onto the disk.
I have a set now that on my car...no pics, though. The car is in the shop with some clutch issues.
<a href="http://www.ogracing.com" target="_blank">www.ogracing.com</a>
Matt
OG Racing sells brake ducts for 944s that seem to work pretty well.
The kit includes the duct, hoses, and a backing plate replaces the current splash shield. The hose attaches to the new backing plate which directs air directly onto the disk.
I have a set now that on my car...no pics, though. The car is in the shop with some clutch issues.
<a href="http://www.ogracing.com" target="_blank">www.ogracing.com</a>
Matt
03-19-2003 | 07:39 PM
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From: Virtually Everywhere...
I don't have a clue if those exist anymore, but their design is dated. Cooling rotors is best done with air directed at the center of the rotor, as with the OG Racing application. However, the OG Racing application does not fit (per se) the 944na - only for the 944S2/951/968. Most folks fabricate using sheet aluminum and brake ducting hose (from the same location as above, or from the fog light area (not available on RoW models). When ducting air, remember that the higher the better - track near-surface temps can lessen the cooling effect dramatically. At ~18" from the surface, the temp turns relatively isothermal.
Good Luck!
Good Luck!
03-19-2003 | 08:29 PM
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From: Virtually Everywhere...
Sorry, I'm into oceanography/meteorology... Isothermal - temperature remains relatively constant.
A gradient of heat can be graphed from the surface of a race track to extend into the atmosphere. Surface temp and near-surface temp are much higher than ambient temp (that which you feel in your face). The gradient drops off (becoming cooler) as distance from the track surface increases until it becomes "Isothermal" - at this point, the temperature remains relatively constant with the only changes occuring through the effect of currents (air, wind, whatever - described as "wind-chill") and pressure (from altitude increase - not an issue with race cars unless they are flying... like McLarens, Mercedes LMP, or Porsche GT-1's
)
A gradient of heat can be graphed from the surface of a race track to extend into the atmosphere. Surface temp and near-surface temp are much higher than ambient temp (that which you feel in your face). The gradient drops off (becoming cooler) as distance from the track surface increases until it becomes "Isothermal" - at this point, the temperature remains relatively constant with the only changes occuring through the effect of currents (air, wind, whatever - described as "wind-chill") and pressure (from altitude increase - not an issue with race cars unless they are flying... like McLarens, Mercedes LMP, or Porsche GT-1's
)
