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Old 08-08-2009, 01:04 PM   #1
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Default Let's come up with a new hood design.

I have a fiberglass shop and have been messing around with various miata hoods over the last month to get a better feel for what it takes. We do not have the ability to do a vacuum press, so they all came out about 5lbs more than OEM. As of now we are not doing it with the OEM hood catch and only through hood pins, so I would concier it a track hood for now.

What I need are some rough designs as to what you guys want. I will do all the work on it and only charge you guys what it costs for me in parts plus their labor. My guys are just sitting around and need stuff to do.

I know most agree that the front vent behind the radiator would be beneficial, but what about more than that? Would the FM extractor hood plus that front extractor be the perfect hood? Let me know guys.

Eventually I will work in the hood catches, but it is not my number one priority.
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Old 08-08-2009, 01:24 PM   #2
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you dont have the ability to do a vacuum bag? you should. it's cheap and easy and shocking that you dont do it.

the materials aren't terribly expensive and the vacuum is easy to draw. you dont even need a vacuum pump. just get a large pressure (vacuum) vessel and a venturi vacuum connector for your air compressor. I've seen people use an old hot water heater as a vacuum chamber.

plus you guarantee a stronger part and eliminate unsaturated air pockets.

DO IT DO IT DO IT
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Old 08-08-2009, 01:25 PM   #3
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+1
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Old 08-08-2009, 01:38 PM   #4
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OK then, I will start looking at doing a vacuum setup. While I am figuring that out, we can come up with the design. Everything that we do is done with hand laid fiberglass, so there hasn't been a need to even look into vacuum systems until now.
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Old 08-08-2009, 02:07 PM   #5
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there's no reason you can't vac bag a hand laid setup.

I did it in college on a 15 foot boat hull. it's really very simple. you lay all our materials and resin into the mold, lay the vacuum bagging layers on, and seal it all with pucky tape (basically rope caulk).

course I worked with a guy who worked a lot with burt rutan so that helped
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Old 08-08-2009, 02:22 PM   #6
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GV lid. Extractor behind the radiator, inlet for the turbo. Personally just the extractor looks good to me. In any northern state it'd be important to have the extractor far enough forward that rain won't dump in on the engine and belts.
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Old 08-08-2009, 02:23 PM   #7
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So any Ideas, desing wise??

^Nvm guess we posted at the same time.
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Old 08-08-2009, 02:29 PM   #8
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I want a hood with no hump so i can use this:


USA/CANADA shop for Subaru Impreza BODY KITS and STYLING Products, diffusers, etc by HT AUTOS UK
molded-in of course.
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Old 08-08-2009, 02:33 PM   #9
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I'd like this one more, the "Gimmie Gears WRC hood vent":




with a big, fat air foil on it that sticks straight up.
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Old 08-08-2009, 03:06 PM   #10
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Honestly one large vent behind the radiator and louvers down the sides is probably the best for track use. Something like the autokonexion hood.
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Old 08-08-2009, 04:50 PM   #11
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Quote:
Originally Posted by tiber55 View Post
Honestly one large vent behind the radiator and louvers down the sides is probably the best for track use. Something like the autokonexion hood.
but its heinous and poor fitting. Oh, and they guy who made it cries like a ------ on the internet. He just took a JC Whitney scoop and molded it to an ugly miata hood that has no effort given to aesthetics. Look at that subie hood, make love to it...with leather.


It would also be cool if you could maybe shorten the hood scoop too.
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Old 08-08-2009, 06:10 PM   #12
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From what I understand, the Subie has the hood scoop for an intercooler underneath. Having one on a miata would be pointless, unless you want to aircool the engine (you don't want to aircool the engine). Also, you are going to need a way to vent the air that goes into the scoop, otherwise the scoop is just going to act as a barrier to the oncoming air, like pop-up headlights. I don't think making the air travel a 90* bend through the engine bay and out the bottom is very effective.



...Unless you're talking about the vent in front of the scoop, in which case it would look badass.
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Old 08-08-2009, 06:24 PM   #13
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Quote:
Originally Posted by Cococarbine3 View Post
From what I understand, the Subie has the hood scoop for an intercooler underneath. Having one on a miata would be pointless, unless you want to aircool the engine (you don't want to aircool the engine). Also, you are going to need a way to vent the air that goes into the scoop, otherwise the scoop is just going to act as a barrier to the oncoming air, like pop-up headlights. I don't think making the air travel a 90* bend through the engine bay and out the bottom is very effective.



...Unless you're talking about the vent in front of the scoop, in which case it would look badass.
I didn't think we had to explain this. But yes, I'm only referring to the extraction vent...everyone here understands the pressure differential concept.
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Old 08-08-2009, 06:38 PM   #14
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honestly id buy any of the hoods shown above. But my personal favorite is the garage vary hood posted ot this hood.
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Old 08-08-2009, 06:44 PM   #15
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oh.
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Old 08-08-2009, 07:04 PM   #16
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Quote:
Originally Posted by cueball1 View Post


GV lid. Extractor behind the radiator, inlet for the turbo. Personally just the extractor looks good to me. In any northern state it'd be important to have the extractor far enough forward that rain won't dump in on the engine and belts.
i want to know where in there hell do i get those headlights, been searching for a while and cant turn anything up.....

does anybody know where i can get em?
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Old 08-08-2009, 07:40 PM   #17
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Quote:
Originally Posted by slutz4 View Post
honestly id buy any of the hoods shown above. But my personal favorite is the garage vary hood posted ot this hood.
**** the hood, i want the bumper.
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Old 08-08-2009, 07:45 PM   #18
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hustler, u cr.net ***
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Old 08-08-2009, 08:04 PM   #19
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Quote:
Originally Posted by tyson87 View Post
hustler, u cr.net ***
I highly recommend you STFU before your skin becomes my new coat.
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Old 08-08-2009, 08:58 PM   #20
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If I could get a hold of the GV hood I could make it really fast. I have a couple straght hoods that I could start cutting and looking at.
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