my $50 hood extractor - Page 4 - Miata Turbo Forum - Boost cars, acquire cats.

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View Poll Results: The $50 hood extractor: is it worth it?
Worth every penny. Where do I get one? 21 80.77%
Rice... but I might eat it. 3 11.54%
If you need an extractor, you've got bigger problems. 2 7.69%
Voters: 26. You may not vote on this poll

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Old 04-11-2008, 05:41 PM   #61
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I've been working on getting one of these in too... I have the hole in my hood and everything ready to mount up, but I need to repaint the scoop before I put it in. I am out of town for the next two weekends, but hopefully the weekend after that I will be able to get out on the track and let you know if it worked or not. I won't have any "hard data" or logs, but I do know my car was running hot on the track in mild tempuratures (~60* F) a few weeks ago so if it stays cool after this thats good enough for me!

Great job and thanks for the idea!
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Old 04-11-2008, 05:45 PM   #62
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For cutting - make a template is some paper board and double check it. I didn't on mine, and almost cut away to much. I traced the template using a grease pencil, then laid down painters tape. Used a drill bit, and then a step bit to make a starter hole. From there cut with a jig/saber saw and metal blade. After that, did some trip with tin snips to clear out bracing.

I just took an ~ hour trip on the interstate. After exiting, the coolant temp came up from speed temps but plateaus around 90c. This was on a ~65f overcast day. So there's no denying that this mod is going to help both traffic/stopNgo and speed temps.

I also think the efficiency could be improved by running a flap from the top of the rad to the front of the exit hole. Right now it's just open between the two.
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Old 04-11-2008, 06:40 PM   #63
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Has anyone given any thoughts, and or done any testing on the potential aerodynamic benefits of this extractor? How much air is now going over the hood that used to be trapped under the car?

Do "we" have a feel for the volume of air actually extracted?
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Old 04-11-2008, 07:31 PM   #64
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good thing i have one of these:




I can at least record the before and after drop/rise in air pressure....
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Old 04-11-2008, 08:29 PM   #65
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chris- I haven't. Not competing, so it doesn't really matter - that and the fact that I haven't even gotten around to constructing an undertray yet. My main concern was just reducing temps. That's the nice thing about a project car vs. a race car- there's no race to win and no deadlines to meet.
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Old 04-13-2008, 01:16 PM   #66
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Well the lower you keep the engine bay pressure the less drag the car will have since there is less pressure in front of the radiator. It should help keep the area under the car at a lower pressure since less air is "escaping" there form the engine bay. Small benefits but they are benefits none the less.
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Old 04-23-2008, 12:13 PM   #67
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You guys are a bad influence

We were getting some heat soak with two drivers and a small heat at the last autocross so I ordered a black mini cooper scooper for the car. I will let you know how it goes.

I don't have a magnehelic gauge, so we will have to leave it to the Brain to get any real data. (Hint Hint)
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Old 04-23-2008, 12:24 PM   #68
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ha. we'll see. If i didnt have to drop my tranny twice last weekend, I would have had the hood done.
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Old 04-23-2008, 12:34 PM   #69
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Sneak peak-

Name:  IMG_2914.jpg
Views: 6
Size:  64.4 KB
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Old 04-23-2008, 01:57 PM   #70
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I likeeee ^
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Old 04-23-2008, 03:47 PM   #71
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Do y'all think that one of the carbon style extractors like the one Brain is using would work on an NB hood? As long as the hump in the center of the hood does not come out farther on an NB I think it would work?
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Old 04-23-2008, 03:51 PM   #72
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I think you're thinking is pretty smart.
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Old 04-23-2008, 03:56 PM   #73
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If you put rivets in the right places, the CF scoop will take the shape of the hood. Mine did anyways.
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Old 04-23-2008, 04:11 PM   #74
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I think that a carbon one would look good on my mica green without paint. That would make it really easy.
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Old 04-23-2008, 04:25 PM   #75
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hmmm....i do have a spare hood lying around....
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Old 05-15-2008, 08:55 PM   #76
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Rob...was yours an 02-06 scoop, or 07-08?
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Old 05-15-2008, 09:01 PM   #77
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Quote:
Originally Posted by levnubhin View Post
If you put rivets in the right places, the CF scoop will take the shape of the hood. Mine did anyways.
pics?
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Old 05-15-2008, 09:09 PM   #78
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Quote:
Originally Posted by kotomile View Post
pics?
I'll get some up tomorrow.
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Old 05-15-2008, 09:52 PM   #79
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02-06
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Old 05-17-2008, 07:17 AM   #80
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m2cupcar, could you post the vendor you got the scoop from?

Thanks,
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