Like these?
http://heavenisinmunich.wordpress.com/2010/02/01/elevate-volvo-s40/

I believe they were just cut in a stock hood.

 

Those are the elevate ones. I saw one with the vents on top of the hood itself. But i do like those. Has anyone done those?

 

I'm guessing it was a white car you saw the vents on? That's Aj's car. Those are in fact Aston Martin vents from a vantage. One remedy for it is to remove the rear seal on the hood. I did it quite awhile ago and have had no issues. Also turbo cars will hold more heat as it is.

 

It was actually a blue car! But i would love to see the white one and i have an I car, no turbo ;(

 

Heico:

Or you may have been thinking of Oleg's C30:

Here's AJ's car:

There's also the factory hood scoop that you could buy from the dealer. But it's not functional. Personally, I think it looks like JDM rice from Walmart:

On a T5 with a K16, I'd consider this. But if a hood vent was really necessary, Volvo would have included it in the design. Not gonna deny that it keeps things cooler though

But I can't imagine a hood vent being necessary on a 2.4i

 

It was oleg's C30 is saw!! But dang i really like AJ's too. Any idea of how much they cost to install?

And you're righ MNIWT, its probably not becessary what so ever. Its just when i go for a long drive ( 45-hour) my engine is putting off some major hear when i open the hood. But yet, when i take out my dads accord V6, or any other cars in my family, they arent anywhere near as hot. It was just a question ive always had that i never asked.

 

Would you say our engine bay is more packed than the accord?

 

I like the GT-R hood vents. might do that with my hood... since she'll be in for a repaint anyways...

also, about that carbon fiber hood:

 

Uhg . . . I don't know about this . . . it kind of looks like the car is possessed . . .

 

I love that!! But whats the price? And where do i buy?

 

no further info on that, sorry. maybe you just try emailing them at the address in the picture.

 

Personally I wouldn't do it. Too ricey.

 

I could see that, I think it will only work if your car is balls to the wall looking. It would be the last thing I would do, otherwise I don't think it will fit.

If you're just worried about heat, 'Gate, maybe just lifting the rear of the hood, unless you're looking to gain some agressive styling at the same time.

 

Just take the hood off. You don't need it.

 

+1

 

+

 

yeah, might need to look into this.
my fan kicks on for about a minute after every startup

 

Ok so since we are talking kind of about hoods here and I see people posting about the washers in the rear. Why? How does it help? Moves more air around? Please explain I haven never seen a clear cut answer to why people do it.

 

It's just to help get some of the hot air that is normally trapped out.
It's good for the battery and intake pipe but I'm not sure how effective it actually is...

 

I started a thread about this almost a year ago, some SS'ers came up with a lot of knowledgeable info about including "heat vents" or "hood scoops. One guy actually measured pressure on certain areas of the hood.

http://forums.swedespeed.com/showthread.php?183190-AfterMarket-Hoods

http://www.alibaba.com/product-gs/541138832/OEM_Style_Carbon_Fiber_Hood_for.html And here is an actual carbon fiber hood for us

I think hood vents are a great idea and can be beneficial, but a ricey looking s40... not a great idea.

I like Elevate's the best!

 

that hood is bad news bears. i wouldnt trust a hood coming out of china

 

especially after seeing the payment methods for it... sketchy

 

lol, Western Union. I've dealt with some of their IT people for the product they use on our retail PCs instead of putting their own box in a store. Sketchy mother****ers.

 

How about spoilers and GFX kits for an 06 S40?

 

Can I throw this in? I have a T5 S40 that has a heck of a hot soak issue, especially on summer formula fuel, sometimes stumbling so bad on a hot soak re-start that I have to wait a few minutes before going anywhere. I use my car for work, and it sits on a parking lot or on the street in the dead of summer for about an hour at each stop I make over the course of the day. I'm in Central Texas, and pavement temps can reach 160 degrees by 11AM. It seems to me that losing some underhood heat in such situations would be a good thing, no matter what the method looks like. I've had to vent hoods in Jeeps with V8s in order to relieve a high pressure area behind the radiator, and in a couple of race cars for the same reason.
The other thing I've pondered is keeping the charge air as cool as possible, which is directly related to underhood temps. I can feel a seat-of-the-pants difference in power when ambient temps are over 80 degrees, and again feel it's largely due to underhood temps. I did wrap the intake tube with fiberglass duct insulation last summer, and it helped some.
Just thoughts, but I'm going to do something to promote more airflow through the engine compartment before summer.

 

Just my .02 - if you want to cut the LARGEST amount of heat - you either need to pop the turbo off and get the iron headers ceramic coated by a good company (Jet Hot and the like to about 1500*F rated) OR get the turbo-blanket which costs a bit but others swear by it. The downpipe next and that would do ya quite nicely for reducing underhood temps. Remember where the exhaust streams converge can hit a max of about 1500*F and the Catalytic Converter runs at 1000+. Normal exhaust sits at about 750*F per stream.

 

It's worth remembering that the vents should be located in a low pressure area on the hood or wings. The pressure difference between front of the car and vent is what really promotes airflow. There's typically a high pressure area near the windshield, which reduces effectiveness - in some cases substantially, some may remember Chevy Cowl Induction principle.

A simple manometer, Magnehelix or the like, is a great tool for finding the best location for vents. The lower the pressure at any given point, the better. On the other hand the hottest components, ie. turbo and exhaust manifold are between the engine and firewall so coating and/or wrapping them is a good idea like avenger09123 described.

Objectively, the engine bay isn't that cramped and even the T5 doesn't usually run very hot so it's a matter of preference instead of absolute necessity in most cases. Modify the bejesus out of the engine and the situation changes dramatically.

 

Turbo blanket, coatings, all good ideas. And true, coolant temps are well controlled, no problems at all there. I'm more interested in relieving hot soak, even thought about using an evacuation fan, similar to what a few OEMs used in the bad old '80s, to keep fuel in float bowls liquid. Toyota had a nice setup, a ducted blower to the carb in LandCruisers, probably run off a thermal switch, which actually made a difference, believe it or not.

 

Biggest part of heat soak is the Intercooler, I've hit 70C+ intake temperature with the rad fan screaming in stop and go traffic and third gear pulls. Stock intercooler is just too small.

 

Too true there.