vented carbon hoods
 

I see a lot of vented carbon fiber hoods for sale from various manufacturers and of various styles, but how do people keep it from raining on your engines? are there some type of gutters installed, or do you just let the engine get wet?

they typically come with them installed however you will be just fine with them removed

I have had my hood for about 3 years with no issues. Just make sure your PCM and fuse box covers are on!!

or at least dont go into a freaking car wash with them off.

I've had the rain gutters off my car since I got my vented hood, no issues. If you look into your engine bay you'll see you're going to get more water in there from below then what will fall in from the vents.

What kind of idiomatic moron would do that? :SHOCKED:

excellent info guys, just what I wanted to know. I prefer the looks of the vented hoods as well as the idea of a cooler engine bay, just wanted to make sure. thanks again.

Yeah im still worried about my hood without the covers underneath... I know with them removed it helps alot but still :/ Im not going to put them back on but it makes me a little uneasy when its pouring rain...

my factory hood has a dent, but I've always liked the look of carbon fiber. perhaps I'm a poser, but I'd like the CF hood just because I like it, even with no other reason. I'm still shopping brands though.

^^^ Seibon... :)

I was looking at seibon, thanks for the info.

so what problems will i encounter if water does get in there? like for example what can go wrong if i run without the gutters and water does get in there?

I'd say run the gutters in the rainy season and take them off in the summer.

good point, but lately we have had at least 1 day where it would rain here in cali every 1 to 2 weeks.

Ehh I have no idea what rain would touch but there's obviously connections down there that would get wet. I found some of them and wrapped them up my best with electrical tape... But I think the benefit of how much heat escapes is worth it, especially on hot summer days with 100 degre heat...

I've driven my car in downpours without the gutters and have had zero issues. When you're driving at speed most of the water doesn't even fall into the engine, if you look at how the vents are cut there isnt a straight line for rain to get in there. At highway speed the air basically pushes the water away from the vents.

biggest problem is if you don't dry off your pcm/fuse covers and let the water sit on there you will get big nasty white water marks

easy fix for that is to use turtle wax ice on the covers. It's one of those synthetic wax meant for paint (dont use it on your paint). It does work great on the black plastic of the car. I put a coat on every 6 months and it stays shiny and easy to clean off the whole time. it also keeps the water spots from forming.

so watch the weather channel.... lol

I've gone through two nor cal rainy seasons without issue. It is fun to see the heat pouring out of the vents knowing that they're working

Exactly why I still keep mine off...

How much heat do you think is released through these vents? Anyone have any engine temps or data on this?

I didn't have a temp gauge till after the hood. Expo has a thread where he simply raised the back of the hood up a half inch and saw declines in temp. I would have to assume 6 large vents would do even more.

Having owned a Seibon KS, I'm not really a big fan.

A few reasons:

1. Heavier than stock hood.
2. Hood flexes and bends over bumps.
3. Doesn't reduce engine bay temps while the car is moving.
4. It can reduce engine bay temps while idling in traffic, but it's minimal. Your engine has no load at idle, so it's useless.


While rain gets into the engine bay - it really doesn't hurt anything.

My conclusion is that the only reason you should want one is for bling. It's useless otherwise.

Or if you have a top-mounted intercooler.

While I'm not disagreeing with you I'd like to see some proof or data on these points.

1) your hood may weigh more than stock but others may not. Mine seems to weigh about the same. Different hoods from different batches can
weigh more or less.

2) as in #1 your hood may of been made poorly, mine doesn't flex over bumps at all... I've had no problems

3) I'd like to see data on this.

4) I'd also like to see data on this, I don't see how it would be minimal... I see tons of heat escaping. Data or evidence please.

I'm not disagreeing like I said, I would just like to see proof or some type of data behind this. For all we know you could just be making this up...

Where's my camera?

Edit: Damn it! It's at Ray's house.