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.

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

+1

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.

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 :)

http://www.vary.co.jp/wd/na_bonnet/2b.jpg

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.

So any Ideas, desing wise??

^Nvm guess we posted at the same time.

I want a hood with no hump so i can use this:
http://www.tyneteestuning.co.uk/images/SCOOBY.jpg
http://www.subarukits.com/images/st/...ONNET_VENT.JPG
USA/CANADA shop for Subaru Impreza BODY KITS and STYLING Products, diffusers, etc by HT AUTOS UK
molded-in of course.

I'd like this one more, the "Gimmie Gears WRC hood vent":
http://topscoob.smugmug.com/photos/4...23_mS2fr-L.jpg
http://topscoob.smugmug.com/photos/4...69_68N9c-L.jpg
http://topscoob.smugmug.com/photos/4...80_KpK6H-L.jpg
http://topscoob.smugmug.com/photos/4...57_Gs4un-L.jpg
with a big, fat air foil on it that sticks straight up.

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.

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.

honestly id buy any of the hoods shown above. But my personal favorite is the garage vary hood posted ot this hood.http://hundredone.cocolog-nifty.com/...d/cimg2570.jpg

oh.

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?

fuck the hood, i want the bumper.

hustler, u cr.net fag

I highly recommend you STFU before your skin becomes my new coat.

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.

Fuck hoods. Someone make use some race bumpers (front and rear)

It puts the lotion on its skin, or it gets the hose again!

i have a very, very rare hood for you to copy, lol. Seriously, we're into money!!!

+1

What do you need that currently isn't available. I am open to anything right now.

I need a huge dildo shift knob or maybe a fist. Something I can put my hands on that feels natural, extra veiny.

What about shorty rear bumpers...the one that looks stock but tucks-up under the rear lights and finish panel? Hell, a big fucking bolt on splitter for my new RB bumper would be nice.

+2

One if these on the cheap..

http://www.moesrealm.com/img/bodykits/anhelo.jpg

http://memimage.cardomain.com/member...32_23_full.jpg
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This is pretty hard to beat:
http://www.flyinmiata.com/images/mis...y/DSC02305.jpg

Definately don't want to make that out of fiberglass. ABS or wood might be a better idea.

No lie! I have always wanted an AWR widebody with racing beat.

*cough* NB *cough*

The WHOLE body? Yep. I wish.. Its only 999 for the widebody, plus the 400$ bumper, the 1100$ hood.. :crx:

Swine flu?

he was checking my testicles

small and hairless.


and no NB hood in your pants.

so is it time to dig up the miata hood pressure map again? not yarn strings, but actual pressure values. someone occasionally posts up a graphic that has the pressure gradient of the car's profile somewhere.

you know, I know there was a thread about the CAD model of the NA on miata.net and Travis has cosmos works...

60mph

Attachment 204280

that's inches of merc or what?

is the bumper really forcing that much separation at the leading edge of the hood?

whoops! Inches of water - details here: Untitled Document

Edit: link won't work. Go to member's builds and pg 3 of the 99 ls1 build.

sweet! The FM hood vents sit right over "0", lol.

I wonder if the little air-foil they added changes anything?

Would I be correct in thinking that the more negative the number on the measurements he made to more vacuum is created? Meaning you want to put a vent on the most negative number?

Yep, that's correct. More negative, more vacuum, better delta P. You want the vent right behind the radiator, just like the GV hood from post 14.

Do a fiberglass version of that, with molded headlight lids, and the vent in the same place, and I know of at least 2 people that will buy one. Make sure the skeleton is bonded to the hood so it isn't a floppy flimsy mess (i.e. not hustler's cock).

+1. Make sure you offer one for street cars, too. If you can get the price right mark me down for one.

here we go, dented like a bitch for improper air flow.

Attachment 204237

Garage Vary Type I

:hustler:

I can't see Page 2 of this thread due to it coming up as pron on the firewall, so forgive me if this has already been covered...


While we're at it, can we get a simple, straight hood that goes all the way out in the front corners for those of us getting rid of the barn doors?

I'm about to start building a bulky bracket just to hold those stinkin' covers in place (putting HIDs in turn signals), and would love a flat (no bulge), square hood with one simple extractor in it.

I'm glad you've decided to come up with your own design, seems like a good solution all the way around.

creating two molds with and without barn doors is so absolutely trivial since 99% of the cost of the hood is in labor and materials. I say copy the shit to both options and sell it to everyone.

incidentally, I remember FM's testing with yarn and their claim that the rear vents made the yarn flip around or something. I'd have to find the original thread. I dont recall them using the magnehelic pressure gauge.

Of course once you cut the holes open, your pressure tests are going to change since you have two air paths (one on each side of the hood) and the underside might also be at a vacuum. So yeah, check that shit before you build one.

Making two molds wouldn't be that bad at all. I would have the regular one first to test fit and a little while later have the headlight covering one.

Anyone know of a drop in vent that looks like the GV hood vent? Would make things go significantly faster. How about a whole GV hood.................:)

If I had a GV hood I'd let you borrow.

+1 on that being the best design so far..that is the hotness, and what I would build if I had the ability.

I can tell you that a scoop like the one on my hood absolutely works. A few weeks ago I accidentally left my oil fill cap off. The only way I found out about it was because oil was being sucked out of the scoop and up the hood to the windshield. Which means the oil was being sucked forward towards the scoop and then out.

Attachment 204236
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Wow, that's proof I'll buy.

Make that three.

Looks like B2 is an optimal quadrant for an exit. What about making a good looking louver we could fit into stock hoods at that point. Something that looks like it's made for the car, not ghetto. Add that beat a dead horse smiley here...

http://z.about.com/d/cars/1/0/B/T/2007_Jaguar_XKR.jpg

Where do I send payment?

carbontrix.com

http://www.boostedmiata.com/random/carbontrix.jpg

ill take a copy of that gv hood too

hurry up with your gay-ass hood ideas because I'm pretty much over wiating on car parts.

ps, I'll pm you details on the mystery hood.

It's as easy as cutting a hole in your stock hood and bolting in a $100 scoop. Lets get a better bumper available.
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That sure would look good molded into my extractor hood. If this is easily available, is there still a demand for me to do this with that front vent? I know it is $120, but that is how much shipping alone would be atleast for this hood.

@lev; what size hole did you cut? Wonder if I can get that scoop in the hole I cut.