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chris914 |
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#1
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Member ![]() ![]() Group: Members Posts: 489 Joined: 24-July 04 From: San Diego, CA Member No.: 2,393 Region Association: Southern California ![]() |
Have you made changes to your 914 body or are you thinking of it?
Here are a number of computer models comparing different body modifications to the 914 and the effects that they have on the cars aerodynamic drag. http://www.cassidy-online.com/porsche914/aerodynamic_aids |
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914Mike |
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#2
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Member ![]() ![]() Group: Members Posts: 330 Joined: 27-January 03 From: San Jose, CA Member No.: 198 ![]() |
I'd like to see some studies done on the airflow through the engine compartment, with and without the underbody spoilers, with and without a large fan on the engine...
My '74 no longer has a fan on the (air-cooled electric) motor to create suction on the topside, so should I remove, keep or reverse the little flaps? (IMG:style_emoticons/default/confused24.gif) |
jhadler |
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#3
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Long term tinkerer... ![]() ![]() ![]() Group: Members Posts: 1,879 Joined: 7-April 03 From: Lyons, CO Member No.: 529 ![]() |
...so should I remove, keep or reverse the little flaps? (IMG:style_emoticons/default/confused24.gif) The little flaps underneath the car on the edge of the bulkhead? Keep 'em. They were put there to improve down flow out of the engine bay. Doesn't matter if you're using a crank driven fan, or an electric one, you still need to get rid of that heated air. -Josh2 |
914Mike |
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#4
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Member ![]() ![]() Group: Members Posts: 330 Joined: 27-January 03 From: San Jose, CA Member No.: 198 ![]() |
...so should I remove, keep or reverse the little flaps? (IMG:style_emoticons/default/confused24.gif) The little flaps underneath the car on the edge of the bulkhead? Keep 'em. They were put there to improve down flow out of the engine bay. Doesn't matter if you're using a crank driven fan, or an electric one, you still need to get rid of that heated air. -Josh2 Actually NO fan anymore, the motor just has aluminum fins, so the question becomes: which way does the air flow easiest? Factory setup had a big fan to suck air in from the top, out the bottom, aided by the little flaps, which create a low pressure area for the air to flow into. What happens without any fan, i.e. no suction from the top? Does the top create a lower pressure at the engine grill (lower than the small drop caused by the underbody flaps) and reverse the airflow? (IMG:style_emoticons/default/confused24.gif) If this is the case, removing the flaps would mean more airflow, right? |
jhadler |
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#5
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Long term tinkerer... ![]() ![]() ![]() Group: Members Posts: 1,879 Joined: 7-April 03 From: Lyons, CO Member No.: 529 ![]() |
Actually NO fan anymore, the motor just has aluminum fins, so the question becomes: which way does the air flow easiest? Factory setup had a big fan to suck air in from the top, out the bottom, aided by the little flaps, which create a low pressure area for the air to flow into. What happens without any fan, i.e. no suction from the top? Does the top create a lower pressure at the engine grill (lower than the small drop caused by the underbody flaps) and reverse the airflow? (IMG:style_emoticons/default/confused24.gif) If this is the case, removing the flaps would mean more airflow, right? Uhm... First off, no fan equals no engine... Just a lump of metal... As for air flow? Probably wind up with a pretty stagnant flow in there. Low pressure on top combined with low pressure below equals very little flow. -Josh2 |
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