Additional Cooling, Running a 3"- 4" Hose directly onto the fan |
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Additional Cooling, Running a 3"- 4" Hose directly onto the fan |
GBallantine |
Feb 8 2007, 11:13 AM
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#1
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Member Group: Members Posts: 74 Joined: 12-October 04 From: Toronto,Ont.Canada Member No.: 2,930 |
Any race guys ever run a 3 or 4 inch hose mounted off the front air dam or attached near the outside mirror thru the rear fire wall and directed onto the fan? Does it add any cooling effect? Any pics of setups?
GB |
Demick |
Feb 8 2007, 08:00 PM
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#2
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Ernie made me do it! Group: Benefactors Posts: 2,312 Joined: 6-February 03 From: Pleasanton, CA Member No.: 257 |
You could, but those axial type fans do not move enough air. Sure, it says 2800cfm or whatever, but that is under no load (free air). They don't move nearly as much when you put resistance in it's way. For airflow against a large resistance, you can't do better than an impeller (which is what the original fan is).
Besides, what is being accomplished with the 'sewer pipe' is getting fresh, cool air to the motor. Volume isn't so much of an issue as getting cooler air. In a stock configuration, the air entering the fan is preheated by 20 to 30 degrees (F) if I recall correctly. |
Randal |
Feb 8 2007, 09:15 PM
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#3
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Advanced Member Group: Members Posts: 4,446 Joined: 29-May 03 From: Los Altos, CA Member No.: 750 |
You could, but those axial type fans do not move enough air. Sure, it says 2800cfm or whatever, but that is under no load (free air). They don't move nearly as much when you put resistance in it's way. For airflow against a large resistance, you can't do better than an impeller (which is what the original fan is). Besides, what is being accomplished with the 'sewer pipe' is getting fresh, cool air to the motor. Volume isn't so much of an issue as getting cooler air. In a stock configuration, the air entering the fan is preheated by 20 to 30 degrees (F) if I recall correctly. OK.. and the impeller fan probably moves a lot more air depending upon the RPM, right? So it is 1700 cfm at ?RPM, but much more at say 5-6K |
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