FM Hood Aero Testing v.gettowindtunnel.cfd
Thread Starter
Joined: Jun 2006
Posts: 29,085
Total Cats: 375
From: Republic of Dallas
I bolted the hood to my daily and taped twine under the hood by the vents:

Then cut them so they were only 6" long at got this at 65mph:

This is good, right? Its twine and not yarn...so its more dense and takes more velocity to move them, right? They whip around pretty hard at 70mph but I didn't feel like taking more photos. Unfortunately the hood is severely warped and I'm going to set bricks on the high-spots before it goes to paint.

Then cut them so they were only 6" long at got this at 65mph:

This is good, right? Its twine and not yarn...so its more dense and takes more velocity to move them, right? They whip around pretty hard at 70mph but I didn't feel like taking more photos. Unfortunately the hood is severely warped and I'm going to set bricks on the high-spots before it goes to paint.
Basically... Yes. Haha! It will give a better idea of how the air is flowing when it approaches the vents and should show if there is a high pressure area or low pressure area around them.
Thread Starter
Joined: Jun 2006
Posts: 29,085
Total Cats: 375
From: Republic of Dallas
"haha" me again and we're going to have serious issues. I will test again on the way to the gym tomorrow where I'll push more weight than you've collectively seen in your pathetic life.
After 3 sets of plugs I had to do something.
https://www.miataturbo.net/forum/mem...lbums/146/695/
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