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> Show off your hood vents, For your 914's with radiators
Corkus
post Oct 28 2010, 11:21 PM
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If you have a 914 hood vent photo, please show it off.

I took this photo off of a YouTube video for a Rotary powered 914. So far I like this vent best and my Subaru conversion is getting a hood vent soon.

Is this a 911 vent?

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Andyrew
post Oct 29 2010, 12:13 AM
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Old pic.
From experience I dont think that little vent is going to be enough. You need 2x your inlet size on your outlet.
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Andyrew
post Oct 29 2010, 12:29 AM
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FYI, Im changing my hood to stock and cutting the wheel wells. Its just not smart for a DD to have an exposed radiator/ exposed trunk.
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shoguneagle
post Oct 29 2010, 03:10 AM
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I have not completed my air/oil cooler inlet/outlet yet but I am going to use a 996 air diffuser inlet to the cooler. Currently building outlet box twice the size of the inlet which I will either duct up through the hood, or out the wheel area. Although it is not a radiator coolant type, the principles are still the same. Roughly 1:2 (inlet to outlet)

Sorry I do not have any pictures yet but what I hope to see on this thread are different types of hood outlets available.

Andyrew, I am surprised to see you still using the old hood outlet. Great to see that you are still involved and hopefully going to school.

Sorry to hijack the thread.

Steve Hurt
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jmmotorsports
post Oct 29 2010, 07:16 AM
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I built these for my V8 this summer.

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ripper911
post Oct 29 2010, 07:41 AM
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Radiator on a 914? (IMG:style_emoticons/default/WTF.gif) (IMG:style_emoticons/default/stirthepot.gif)
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d914
post Oct 29 2010, 07:47 AM
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still in process

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JRust
post Oct 29 2010, 07:48 AM
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QUOTE(jmmotorsports @ Oct 29 2010, 06:16 AM) *

I built these for my V8 this summer.

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That is nicely done Jerry! Are you goung to have a shroud forcing the air up through the opening? I like it (IMG:style_emoticons/default/drooley.gif)
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pcar916
post Oct 29 2010, 08:01 AM
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Under construction
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pcar916
post Oct 29 2010, 08:06 AM
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A couple more

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The cooler / cell package. I can get the cooler and fuel cell out in less than 15 minutes without draining the oil system.
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andys
post Oct 29 2010, 10:01 AM
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I don't have any recent photos. Radiator is ducted to this vent, and there's a foam gasket that seals the duct to the underside of the hood.

Andys


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Rleog
post Oct 29 2010, 04:03 PM
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Beautifully done, Pcar916!
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pcar916
post Oct 29 2010, 08:37 PM
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QUOTE(Rleog @ Oct 29 2010, 02:03 PM) *

Beautifully done, Pcar916!


Thanks! It was an adventure since I'm not a sheet metal guy. But my first attempt with the same cooler vented under the car and weakly-ventilated (even with two big fans) was not enough. The 993 motor doesn't have an on-board cooler behind cylinder number 6, so external is all there is unless you dump the second filter console and put back a cooler in that location.

There are more elegant sheet-metal craftsmen out there but this has worked for 10 years (with a small additional cooler in the high pressure circuit during the summer months) so I'm happy with it... zero-maintenance.

There are great examples in this thread. Hopefully they'll give enough ideas to build something functional.

Hood exit rules: Functional 1st
- The closer to the front of the car the better. It's a low pressure zone. Pressure gets higher farther back on the hood peaking at the bottom of the windshield, which is why cars have a vent there that forces air into the interior.

- The cooler intake must be sealed. Intake air WILL escape if not forced to go through the cooler fins.

- Don't make you exit the same shape as mine. I included those little tabs because of the 917 cooler-exit I modeled it after (my all-time favorite Porsche race car). But they're always in the way when I have to use a gas jug and are all bent up because of it. Simple is gooder.

- I should've used -16AN rather than -12AN. The cooler IS -16. I suspect with -16 I wouldn't have had to add another auxilliary cooler.

Class rules: Check 'em. The SCCA regards hood exits as an aero-improvement. If the car didn't come with one it's usually illegal in road racing. I don't think it matters in AX.

It's fun to build stuff. (IMG:style_emoticons/default/welder.gif) (IMG:style_emoticons/default/sawzall-smiley.gif) (IMG:style_emoticons/default/smash.gif) (IMG:style_emoticons/default/beerchug.gif)
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