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> Air foils under car infront of engine., engine cooling
Geezer914
post Aug 22 2009, 09:42 AM
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How do the plastic air foils that mount under the car, infront of the engine, help cooling? Are they worth adding?

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Bartlett 914
post Aug 22 2009, 09:48 AM
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They are helpful. Use them! They mix the air up so air can be picked up better otherwise the air is is ducted through under the car.
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type47
post Aug 22 2009, 09:49 AM
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My guess is that they are worth having installed since the factory installed them for some reason. They mount on the bottom of the back edge of the firewall by 3 or 4 6mm screws, if I recall correctly. Do a search here as there were some recent post including a pic of the flaps installed.
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dr914@autoatlanta.com
post Aug 22 2009, 09:50 AM
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yes yes yes.
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SLITS
post Aug 22 2009, 09:52 AM
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They were mounted with 3 7mm? bolts on each side. If the car came equipped with them, there should be weld nuts on the rear body pan lip. You can easily drill and use regualar fastners ... no biggie.

As I remember, the are spaced about 15" apart from the centerline of the engine or car (There is a diagram in some manual that I have or try Pelican Parts tech section).

Purpose is to create lo pressure area under the cylinders to help suck air and aid in cooling (they do work well).
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Johny Blackstain
post Aug 22 2009, 09:52 AM
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They cause a vacume to occur under the engine @ speed so as to help draw cold air in from the top & through the engine.
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ConeDodger
post Aug 22 2009, 10:05 AM
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Engineers sit in meetings with accountants and argue for inclusion. The accountants in most cases have a lot of pull because the bottom line depends on them. You can bet your bippy (random Laugh-In reference) that these wouldn't be there if they didn't help. (IMG:style_emoticons/default/biggrin.gif)
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jimkelly
post Aug 22 2009, 10:20 AM
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Katmanken
post Aug 22 2009, 10:24 AM
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They induce turbulence which helps throw air along the underside of the engine as well.
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Bruce Hinds
post Aug 22 2009, 10:25 AM
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Like Johny says above....
Actually they create a low pressure area behind them at speed and which helps draw down the air across they cylinders. Some of the race cars with big air dams actually remove the rear bumpers to help draw the cooling air out.
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JazonJJordan
post Aug 22 2009, 06:10 PM
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ClayPerrine
post Aug 22 2009, 06:12 PM
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QUOTE(Bruce Hinds @ Aug 22 2009, 11:25 AM) *

Like Johny says above....
Actually they create a low pressure area behind them at speed and which helps draw down the air across they cylinders. Some of the race cars with big air dams actually remove the rear bumpers to help draw the cooling air out.

(IMG:style_emoticons/default/agree.gif)



That is the reason the 914-GT didn't have a rear valence.
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martinef1963
post Aug 23 2009, 02:49 AM
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Are these "YEAR SPECIFIC" installs, or just certain years had these introduced?

thanks,

Fern
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martinef1963
post Aug 23 2009, 03:01 AM
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Okay, I'll have to goof on myself here, had a stupid moment (IMG:style_emoticons/default/sad.gif) and asked the same question twice.

Just wanted to know if it was year specific cause I don't recall predrilled holes on my 72, but then again I wasn't looking for them.

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QUOTE(martinef1963 @ Aug 23 2009, 02:19 PM) *

Are these "YEAR SPECIFIC" installs, or just certain years had these introduced?

thanks,

Fern
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ClayPerrine
post Aug 23 2009, 03:45 AM
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They were introduced on the 73 model year, and were on all 914s after that.
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thesey914
post Aug 23 2009, 04:01 AM
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ever fitted on a six?
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ClayPerrine
post Aug 23 2009, 04:32 AM
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QUOTE(thesey914 @ Aug 23 2009, 05:01 AM) *

ever fitted on a six?


Not from the factory, but they do make a difference with retrofitted. I didn't put them on my 73 conversion at first, but when I did, the oil temp dropped.
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thesey914
post Aug 23 2009, 04:38 AM
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Interesting....I have the flaps but no mounting holes. I'll have to look at fitting them again.
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ellisor3
post Aug 23 2009, 09:58 AM
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Part Number??? Did not see it on PET (IMG:style_emoticons/default/confused24.gif)
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IronHillRestorations
post Aug 24 2009, 07:50 AM
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Not sure but I think they are NLA
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