Hood Louver Wind tunnel simulation
#1
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Taped ribbon and inserted into louvers, simulated wind speed up to 100 mph, at 25 mph ribbon started popping out, by 50 mph most out, 80 mph all out, 100 mph really moving around and lost a couple ribbons.
Ribbon insertion was varied between 2-5 inches.
Back in the garage with engine fans running hot air can be felt exiting the louvers.
IMHO this location (15-16 pressure zone) does extract heat, other locations toward the front of the hood will work also.
![](https://rennlist.com/forums/members/david-floyd-albums-hood-louver-windtunnel-simulation-picture7116t-mvc-006s.jpg)
![](https://rennlist.com/forums/members/david-floyd-albums-hood-louver-windtunnel-simulation-picture7117t-mvc-007s.jpg)
![](http://forums.rennlist.com/upload/mvc011s.jpg)
Ribbon insertion was varied between 2-5 inches.
Back in the garage with engine fans running hot air can be felt exiting the louvers.
IMHO this location (15-16 pressure zone) does extract heat, other locations toward the front of the hood will work also.
![](https://rennlist.com/forums/members/david-floyd-albums-hood-louver-windtunnel-simulation-picture7116t-mvc-006s.jpg)
![](https://rennlist.com/forums/members/david-floyd-albums-hood-louver-windtunnel-simulation-picture7117t-mvc-007s.jpg)
![](http://forums.rennlist.com/upload/mvc011s.jpg)
![](https://rennlist.com/forums/attachments/944-turbo-and-turbo-s-forum/461065d1279850292-thoughts-on-hood-vents-i-am-having-made-924-cf-diagram.jpg)
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Thanks David for the efforts and post. Nice to know something is happening.
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#6
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Point 27 is actually in the sheet metal just in front of the sun roof!
But yes, I get what you are saying.. I have studied this chart to the ends of the earth in preparation for my own louver experiment!
But yes, I get what you are saying.. I have studied this chart to the ends of the earth in preparation for my own louver experiment!
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I think the effectiveness of these vents is more about the directional type vents they are than high or low pressure thats on the bonnet .. think with those style vents you could put them almost anywhere on the bonnet and they would still be effective i i did mine up the the other way to they are flush from the outside ..
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#9
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Hard to believe it was 4 years ago that you had that done!
I can't seem to find the name of the shop where you had that done. Would you mind sending it to me again?
Thanks
I can't seem to find the name of the shop where you had that done. Would you mind sending it to me again?
Thanks
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I think the effectiveness of these vents is more about the directional type vents they are than high or low pressure thats on the bonnet .. think with those style vents you could put them almost anywhere on the bonnet and they would still be effective i i did mine up the the other way to they are flush from the outside ..