 Floor-pan air deflectors, Need help with retrofitting them into a 72 |
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| gord |
 Oct 7 2022, 06:33 AM
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#1
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Member  Group: Members Posts: 76 Joined: 30-May 20 From: Toronto, Canada Member No.: 24,334 Region Association: Canada  |
Can anyone offer some guidance for retrofitting floor-pan air deflectors on a 72?
I realize I need to drill 4 holes to attach each one, but do I need to tap the holes? Or do the screws go in from the top and thread in the plastic? A good description would go a long way! |
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| bdstone914 |
Oct 7 2022, 08:48 AM
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#2
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bdstone914 Group: Members Posts: 4,696 Joined: 8-November 03 From: Riverside CA Member No.: 1,319 |
Tapping is not needed. They screw into the plastic. There are three holes in each flap.
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| Mikey914 |
Oct 7 2022, 09:37 AM
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#3
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The rubber man Group: Members Posts: 12,729 Joined: 27-December 04 From: Hillsboro, OR Member No.: 3,348 Region Association: None 
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Cary RIP did a nice detail on these when I offered a GB Post 81 http://www.914world.com/bbs2/index.php?sho...ctors&st=75
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| mlindner |
Oct 7 2022, 09:54 AM
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#4
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Senior Member Group: Members Posts: 1,568 Joined: 11-November 11 From: Merrimac, WI Member No.: 13,770 Region Association: Upper MidWest
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Just use through bolts with nylock nuts. Mark
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| ClayPerrine |
Oct 7 2022, 10:29 AM
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#5
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Life's been good to me so far..... Group: Admin Posts: 15,879 Joined: 11-September 03 From: Hurst, TX. Member No.: 1,143 Region Association: NineFourteenerVille
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I always wondered if a rubber air deflector all the way across the car would help with the airflow through the engine.....
(IMG:style_emoticons/default/idea.gif) |
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| gord |
Oct 7 2022, 12:31 PM
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#6
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Member Group: Members Posts: 76 Joined: 30-May 20 From: Toronto, Canada Member No.: 24,334 Region Association: Canada |
Thanks, this was exactly what I needed to know!
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| mlindner |
Oct 7 2022, 01:37 PM
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#7
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Senior Member Group: Members Posts: 1,568 Joined: 11-November 11 From: Merrimac, WI Member No.: 13,770 Region Association: Upper MidWest
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Clay I also wondered about a full deflector. Maybe just where the deflectors are by the cylinder banks suck more air in from both sides and center to create more of a vortex of some kind cooling more?. But they work.
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| Superhawk996 |
Oct 7 2022, 02:20 PM
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#8
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914 Guru Group: Members Posts: 6,502 Joined: 25-August 18 From: Woods of N. Idaho Member No.: 22,428 Region Association: Galt's Gulch
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QUOTE(mlindner @ Oct 7 2022, 03:37 PM)  Clay I also wondered about a full deflector. Maybe just where the deflectors are by the cylinder banks suck more air in from both sides and center to create more of a vortex of some kind cooling more?. But they work. Here’s one way to look at this. OEMs tend toward optimization. If you didn’t need them - they wouldn’t be there at all. If a full width deflector made a significant difference for engine temps or durability beyond the two that are there - it would probably be full width. Easy enough to do back to back testing if you want to see experiment to see if it would affect engine cooling. |
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| Mikey914 |
Oct 7 2022, 09:37 PM
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#9
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The rubber man Group: Members Posts: 12,729 Joined: 27-December 04 From: Hillsboro, OR Member No.: 3,348 Region Association: None
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My modeling suggested that there is more airflow disruption using 2. 4 edges effectively.
This creates 2 low pressure areas. Mixes better than 1 unless you go down further. Not enough clearance to really do that. They made a really good design. The only improvement we could make was to add "winglets" on ours. |
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