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Engine Specific Info and Questions => IDI Engine => Topic started by: xxkoadyxx on February 11, 2011, 06:09:20 pm
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i was wondering if anyone had tryed this or seen how one was made? any sites or such.. i wanna try to make one for my 1.9 :P
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intake manifold? or turbo air intake?
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intake intake, the one that the air filter goes on..ahah
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The thermal properties of carbon are good for making an intake out of so it's not a bad idea. That being said, you'll probably get about another .1 hp. If you just want to make something out of carbon, go for it! Not worth it performance wise though
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Carbon fiber has many similar properties to fiberglass. If you can get use of an industrial autoclave, you can make it lighter and stronger as the vacuum and heat curing makes the cf compress and become more bonded.
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intake intake, the one that the air filter goes on..ahah
usually when you say intake, most of the time people think you are talking about a manifold..
and what job is the carbon fiber going to do that a chunk of 3" bent steel tubing wouldnt do just as good? with way less work..
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2 reasons I can think of.... first, carbon fiber has a very low rate of thermal conductivity. Referring to this chart here, (http://www.engineeringtoolbox.com/thermal-conductivity-d_429.html) carbon fiber isn't listed, but fiberglass is. Aluminum is 250, copper is 401, steel is 43 and fiberglass is .04.
To figure out how much energy is being transfered, take the above coefficient, multiply it by the area (meters squared) of the pipe, the difference in temperatures, divide by the thickness of the pipe and that'll give you the rate of energy loss (watts). If you want to take it a step further, rate of energy loss times mass flow of air divided by specific heat capacity will give you temperature gain of your intake air. Figure out the density change and therefore amount of oxygen you're losing and that ratio will give you your drop in power!
Second reason is that it looks pimp ;D
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ok, well your going to gain .01 hp from that pimp looking intake..
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This is like any battle of the minds..
Why must there be a power gain from it? Lowering your car, looks good.. most do it. Any performance gain? No.
Koady, here is something that will surely turn the heads. Make an intake that will form and suction to the hood, where you will have a hood scoop. RAM-AIR !!!
However the stock intake on a stock or even pepped up motor is more than sufficient.
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However the stock intake on a stock or even pepped up motor is more than sufficient.
I beg to differ :P I think the stock intake is fairly restrictive. Koady needs ram air.
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does this intake look restricted? it may not be IDEAL, but i know it flows way more than enough air for my VNT..
its a stock TD turbo intake tube, with a chunk of ricer intake clamped onto it, and a washable neuspeed (prolly just a re-branded K&N) air filter..
(http://i702.photobucket.com/albums/ww28/Dubsmoke/New%20Rabbit/P1000412.jpg)
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This is like any battle of the minds..
Why must there be a power gain from it? Lowering your car, looks good.. most do it. Any performance gain? No.
No power gain but rather a gain in handling, to a point of course, drop it too far invert the control arms and your car will handle like a$$.
I say build your cf intake and then show it to us.
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This is like any battle of the minds..
Why must there be a power gain from it? Lowering your car, looks good.. most do it. Any performance gain? No.
No power gain but rather a gain in handling, to a point of course, drop it too far invert the control arms and your car will handle like a$$.
I say build your cf intake and then show it to us.
If thats the case, then an inch of lowering will be excessive. The Control arms are almost parallel.
I suggested the CF intake to a ram air trans am type hood scoop ;)
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What I'm tempted to do is make a rad support out of CF and make the top few inches a ram air running into a 3" CF tube, going through a stock style air box, then down to the turbo.. stock looking, large ram air from the front of the vehicle and a little bit of bling under the hood
So many projects I want to do! haha
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This is like any battle of the minds..
Why must there be a power gain from it? Lowering your car, looks good.. most do it. Any performance gain? No.
No power gain but rather a gain in handling, to a point of course, drop it too far invert the control arms and your car will handle like a$$.
I say build your cf intake and then show it to us.
If thats the case, then an inch of lowering will be excessive. The Control arms are almost parallel.
I suggested the CF intake to a ram air trans am type hood scoop ;)
my last mk2 had 2" drop coils in it, all the way around, and it handled like a MOFO.. control arms were parallel with the ground.
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im wanna do it just for looks really, as i seen it done on a VR..prob a baught one, but cant be to hard to make...can it?get 2.5in PVC pipe cover it in wax and put carbon ontop of the wax, once it drys then dip it in water and slide the carbon fiber pipe off of the waxed PVC pipe..or similar pipping..thats what im gonna try to do, or use an old intake hose..
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OP your project sounds fun but I'm totally with 8v-of-fury! If you are going to take the time to do it make something unique. Also, to those blithering about handling, I've lowered my mk2 quite a bit. Control arms are definitely parallel with the stock rims n tires but I think the handling is really justified by spring rates and dampners. Lowering lowers center of gravity and gives expected results. Less roll, more slide. YMMV
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im wanna do it just for looks really, as i seen it done on a VR..prob a baught one, but cant be to hard to make...can it?get 2.5in PVC pipe cover it in wax and put carbon ontop of the wax, once it drys then dip it in water and slide the carbon fiber pipe off of the waxed PVC pipe..or similar pipping..thats what im gonna try to do, or use an old intake hose..
The thing about carbon fibre is its light and strong, but only half of the finished product is fibre, the other half is resin. I would think it would be massively expensive to make anything out of carbon fibre, just find out how much a square meter is as you'll need quite alot of layers to make something, in the same way as fibreglass. Then there is the next point, strength. Part of what makes carbon fibre have the properties that you find out about is the way its made, with moulds where the resin is applied, carbon fibre worked in to into it then layers of resin a fibre worked together with rollers, finally then being subjected to pressure and a little heat to fully cure it. Otherwise you basically end up with something that has about the normal strenth of some fibreglass - maybe. The other thing to consider is resin. I know that some fibreglass resins are only heatproof up to a point, but if they were exposed to enough heat for long enough(an engine bay, near and exhaust for long enough) the resin tends to break down and bubble. So you need to make sure you get the right stuff and it apply it the right way
Dont get me wrong carbon fibre looks good and I want to make a front splitter/spoiler for my beetle (the flat type that are level with the bottom of the car), but I will make it out of ply, coat the ply with fine fibreglass and then carbonfibre, so that its strong, waterproof and looks cool.
So depending on the application/design of the inlet you want to make might depend on how worth it it will be. If you were doing it for looks and could get mild steel pipework made, you could then just use a single layer of fibre with resin over the top, that way you'd have the strength without the cost of massive amounts of CF.