sinfestboy

is it? its the feed, hood.

if it is vented, is it 3 vents or 2? its beautiful..... and if it is actually vented..... that thing must let out tons of the hottest air possible.

Mahjik

iTrader: (1)

I believe those are real vents. It's been a while since I looked into that hood, but I think I remember it being quite pricey (at least more than I was looking to spend on a hood).

However, I believe it's one of the best looking hoods available for the FD.

If you decide to get it, post some pics!

sinfestboy

read the first line of my signature

and also, not only is it the est looking one out, its very clean looking, and if it is vented, thats probably the best place for the vents to be, they would create a wind tunnel in the engine bay..... and its right above the engine, so the heat from there would have an easy place to go.... ooooohhhh, I kike that hood more and more the more I think about it.

GoRacer

iTrader: (2)

I beleive Tony from RXecret7 has that on his purple FD. Two vents, the 3rd is an optical illusion as it is the end of the hood.

Sinfestboy, aren't you too young for that naked girl sig'.

maxpesce

those Vents are NOT in a good place to vent hot air - the are in the HIGH pressure zone created by the windshield That why the cabin vents are placed there( at the back of the hood) to take advanage of that high pressure to force air into the cabin- vents near the FRONT of the hood are better because of the LOW pressure created as the air flows around the curve of the top of bumper.

TpCpLaYa

iTrader: (10)

a cha ching

80-CU.IN.T

I love that hood but I have too agree.

I have wanted to tape string to the top of an FD hood for quite some time now to get an idea of the pressure zones, unfortunately I haven't gotten around to it yet. From past experience with other cars I can't see how that design would be very functional once you are moving.

If you look at the designs of most other hoods for the FD they are made to create a huge low pressure zone that actually pulls air out from under the hood. Very functional but very Ugly in my opinion.

I sure hope someone here, who has experience with this hood, can prove me wrong. Please let it be because that is the only hood that I have seen besides stock that doesn't ruin the lines of the car.

dkny_boi

I don't want to sound like an idiot... but i'm not really understanding what you're tryin to say. (i'm not good w/ high/low pressure zones and how they'd affect the hot air coming out of the engine bay) could you... elaborate a bit more why it's better to have the vents near the front opposed to the back? I figured back would be good cuz when your moving, and the vent's at the front... hot air comes out, but not the hot air from the back of the engine bay?

daiSho

anyone know if this hood was ever offered in CF? i like it..

Mahjik

iTrader: (1)

Usually the CF hoods are replicas. I've only seen a Feed style front replicated. I doubt you'll ever see a replica of this hood and the original is almost $2000.

White84SE

Okay, because of the shape of the car, and the properties of air when moving, air would not come out of the engine bay where those vents are. Outside air would actually be forced into the engine bay of the car, not vice versa. This is the principle behind working cowl induction hoods on muscle cars..

--Danny

dkny_boi

Hmm... even though they are vents and not inlets? i'm sorry, I mean, just the "properties of air" doesn't tell me much other than "listen to me, I'm right".
but air goes through the radiator when car is moving... and towards the back of the engine bay does it not? So having a vent near the back would be more effective than having one at the front isn't it? Or equal in effect? I thought FEED was a reputable company, I don't think they'd make a useless design unless it's just for looks...
I don't want to come off as an ***, I just want more details to understand...

Dr Wankel

True the air does flow from the front to back of the engine bay but the actual pressure of the air flowing over the outside of the car will have a geater effect on what the air under the hood is doing than just the force of the incoming air being pushed from the front of the bay to back. Think of the hood of the FD like the wing of an airplane. You get a nice low pressure zone on the upper leading edge, and the air speeds up in this area ( I.E. right along the leading edge of the hood,) while you get a high pressure zone at the base of the windshield. So, air will act like a fluid and take the path of least resistance out of the engine bay will exit the bay in the front if you have a nice vent there because there is less pressure on the outside trying to push the air back in. Making sense? While if you have a vent at the back (I.E. the FEED hood) you may still get some air exstraction but, its not going to be as good because the air inside is being pushes back into the engine bay by the high pressure zone in that area.

Fd3BOOST

iTrader: (7)

Nice ******* hood. I'd take that over my mazdaspeed anyday.

Akagi_Red_Sun

It must have some functional properties if the xj220 has that kind of hood?

http://www.seattlejagclub.org/images/xj204.jpg


hmm... actually, the engine is behind the driver... nevermind.

http://www.seattlejagclub.org/images/xj230.jpg

dkny_boi

Thanks so much, Dr Wankel, for the clarification. that made perfect sense.

btw... nice name

maxcooper

The windshield on the XJ220 is at about the same angle as the hood, too, so it is kind of like those vents are in the middle of the surface that would be the hood on the FD.

-Max

sinfestboy

arrrggghh, I forgot about the whole "cowl induction" thing. o well.

sinfestboy

!

how much would it cost you to make a custom carbon fiber hood? maby with BMW M3 GTR style vents (or maby evo style), and something like the feed vent. one for function, one for looks.

80-CU.IN.T

You are not an idiot. Entire books are written on this subject.


------------------------------------------------------------------------


True the air does flow from the front to back of the engine bay but the actual pressure of the air flowing over the outside of the car will have a geater effect on what the air under the hood is doing than just the force of the incoming air being pushed from the front of the bay to back. Think of the hood of the FD like the wing of an airplane. You get a nice low pressure zone on the upper leading edge, and the air speeds up in this area ( I.E. right along the leading edge of the hood,) while you get a high pressure zone at the base of the windshield. So, air will act like a fluid and take the path of least resistance out of the engine bay will exit the bay in the front if you have a nice vent there because there is less pressure on the outside trying to push the air back in. Making sense? While if you have a vent at the back (I.E. the FEED hood) you may still get some air exstraction but, its not going to be as good because the air inside is being pushes back into the engine bay by the high pressure zone in that area.

-----------------------------------------------------------------------

Very well explained and in one paragraph no doubt.

Alpine

just some thoughts of mine. as air speed increase, pressure decrease, correct? after air traveled through the long smooth hood of FD, speed will increase? thus the outside pressure will be lower in the rear part of the hood than the front part of the hood, is that correct?

how close does vents have to get to the windshield, for the cowl induction to take effect? most of the cowl inductions are right in front of the windshield. Maybe at the location feed placed the vents, the highpressure area caused by windshield is not in effect?

DriftinJim

iTrader: (24)

BTW, you can also remove the thick weatherstripping at the rear of the hood to help bvent some heat. I can feel it coming out, especially at stops. And yes, I drove with my arm out the window on the hood feeling the hot air come out while the car is moving, too.

dkny_boi

Ha ha, I wish I could have seen you drive by while doing that. Would that ever be a funny site

maxpesce

That strip is the to PREVENT the COWL INDUCTION effect, ie High pressure air flowing under the rear hood into the engine compartment, and reducing the air flow through the radiator. Air flows through the radiator b/k the pressure under the hood is lower than in front of the rad - if you allow the high pressure air from the base of the windshield (about the same pressure as in front of the nose of the car) to flow under the back of the hood it INCREASES the pressure behind the radiator.

maxpesce

Check out old TransAm's with the reverse shaker scoops - they are a good foot from the base of the windshield and were very effective. I read an article someplace by a former Chrysler engineer that the shaker scoops on the Hemi 'Cudas would have worked better pointed to the rear, but they did not want to be accused of copying the Pontiac design!