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Front air dam?

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Old 06-04-09, 02:21 PM
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Question Front air dam?
WHAT IS THE PURPOSE OF THIS PARTS?





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Old 06-04-09, 11:09 PM
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Not sure anyone knows! Only installed on 280hp models, maybe the extra 15hp gives the front end wings.
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Old 06-05-09, 12:13 AM
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It dams the air in the front, of course.
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Old 06-05-09, 12:16 AM
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Please somebody help!!!

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Usually to prevent air from going under the front of the car.
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Old 06-05-09, 12:22 AM
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it starts the party, duh.
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Old 06-07-09, 06:19 AM
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Originally Posted by billyboy
Not sure anyone knows! Only installed on 280hp models, maybe the extra 15hp gives the front end wings.

Not installed on all new 99' fd ?
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Old 06-07-09, 06:22 AM
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Originally Posted by nissanconvert
usually to prevent air from going under the front of the car.
to prevent which effect?
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Old 06-07-09, 08:24 AM
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Originally Posted by MILOS7
to prevent which effect?
Lift. Air dams can create a low pressure area under the front of the car.

Cooling. If the air can't go under, it has to go around or through the bumper inlet.

These are just wild *** guesses as I am not an engineer of this sort.
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Old 06-07-09, 06:41 PM
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Other than aero, the only other possibility, is something to do with the second oil cooler - or cooling in general....for the life of me, couldn't imagine how it could achieve any outcome in that area though. Maybe the Japanese readers can shed some light.

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Old 06-07-09, 07:06 PM
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Perhaps it's just a stiffener for the lower section of the intake. There isn't anything too structural on the bottom (at least on mine). Maybe the Mazda engineers expected the front lip to generate a lot of downforce. Just a guess.

Dave...
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Old 06-08-09, 12:46 AM
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In the HyperRev published "RX-7 magazine" # 016 I have there is and info add for "Auto Ex" parts and one thing they have are two aluminum strips that go right where that plastic piece is pictured above.

They have cut out an area in the plastic undertray behind the first strip through which you can see the radiator fans and the second taller strip goes at the rear of the plastic undertray.

Info add says it is a venturi.

So it creates a low pressure area to help evacuate the radiator exhaust flow. I imagine the stock piece does the same just is shorter and so has less chance of hitting objects in the road.
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Old 06-09-09, 05:52 AM
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seems to be more hole in 99' undertray to fit this part


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Old 06-09-09, 09:48 AM
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Originally Posted by BLUE TII
...it creates a low pressure area to help evacuate the radiator exhaust flow...
I second it. I believe Z06 have a similar device for the same purpose.

- Sandro
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Old 06-09-09, 09:53 AM
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so does my Mini Cooper
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Old 06-09-09, 11:16 AM
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So does my 1971 Pontiac. It's not rocket science...
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Old 06-13-09, 03:39 AM
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link to buy this part

http://www.rhdjapan.com/jdm-low/Mazd...D3S-RX-7-59955
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Old 06-14-09, 05:03 AM
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Originally Posted by Sandro
I second it. I believe Z06 have a similar device for the same purpose.

- Sandro
lol, all GM vehicles have this.... looks kind of ridiculous seeing how big those are
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Old 06-14-09, 04:28 PM
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any plan to have this part cheaper? ( a custom one ? )
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