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NACA Duct/seat question??
Hey guys. I plan on running the NACA duct 1/4 windows on my car, but I had a question in regards to using them to supply the air to these OMP seats. Here is a link:
http://www.ompracing.it/detail.html?productcode=HA/747 Would it be possible to route the hose from the seat to the window? Or am I looking at this the wrong way? If I'm correct, I thought about using one for my seat(drivers side) and using the other side(passenger) to route to the motor via a hole in the rear to aid in air flow. Thanks guys. Chris |
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09-17-2010, 02:25 PM
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09-22-2010, 05:13 AM
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Navin Johnson
Join Date: Mar 2002
Location: Wantagh, NY
Posts: 8,787
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Sure you can do that, on my car I run one hose from the quarter window naca duct to the center tunnerl, blowinf onto the tranny, the hose from the other window I zip tie to the cage and have it blow air over me... I am thinking of adding another duct with a filter sock to supply air to my helmet.
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Don't feed the trolls. Don't quote the trolls  http://www.southshoreperformanceny.com '69 911 GT-5 '75 914 GT-3 and others |
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09-22-2010, 06:00 AM
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coolcavaracing.com
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Tim, any pictures and details on how you have positioned the hose to the transmission?
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Pål (Paul) - The Norwegian lost in Finland... 1978 911SC 3.6 | 2001 Boxster S Racing Car | 1966 912 based 911 RSR replica racing car (for sale!) come and follow the Porsche Sports Cup racing fun and me at www.facebook.com/coolcavaracing 
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09-22-2010, 06:04 AM
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Diss Member
Join Date: Jul 2002
Location: SC - (Aiken in the 'other' SC)
Posts: 5,020
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The NACA duct was designed to provide a duct that doesn't add any parasitic drag to a shape. In other words. If you calculate the drag of a shape and then calculate the drag of that shape with a NACA duct added to it, they would both be identical.
A NACA duct was never intended to create great airflow. To get a reasonable quantity of air through it you need the duct to be located at a high pressure point. Design books generally recommend that they be used on forward facing surfaces or known high pressure points. The rear quarter windows are not a high pressure point. The side windows do lower the inside pressure of the car but my guess is it wouldn't be enough to create a reasonable airflow to really ventilate the seat. I would also expect it to feed rain and moisture to the seat. I would really think that the best way to feed this would be with a fan and/or through a forward facing duct that has provision to separate water from the air. The ventilation grill between the hood and the windscreen seems to be an obvious choice.
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- "Speed kills! How fast do you want to go?" - anon. - "If More is better then Too Much is just right!!!" - Mad Mac Durgeloh -- Wayne - 87 Carrera coupe -> The pooch. |
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09-22-2010, 06:52 AM
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Alter Ego Racing
Join Date: May 2002
Location: Florida
Posts: 5,553
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Quote:
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09-22-2010, 07:04 AM
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I am going to redo the the air flow from the main vents in the dash to blow fresh air in (Im removing the A/C). The only reason I brought this question up was because OMP makes that air-flow seat. I though it woul be a good idea to just run that hose up to one of the NACA duct vents. But it seems like it might not blow enough air. Tim, how is your set-up?
Chris
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If you want something bad enough you will find a way to achieve it. If not, you will simply find an excuse. |
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09-22-2010, 12:19 PM
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