Anyone see any actual benifits on keeping the engine bay cool with the installation of a vented hood?

Just wondering since every time I open the hood after running, I can feel the heat escape. Just don't know if when you are driving it makes any difference in keeping it cool?

 

it help just a little bit. It will if the vent hole big. Most Velside and Seibon, the vent area very small.

 

Those small holes create a prettybig cooling affect when moving.

 

Looking for actual data out there. Since a new hood is so much money, I need some actual benifit to spend my money. I like the look, yet I can't make myself spend the money on it unless it helps the performance. Something stupid I promised myself when I bought the car (stupid promises).

Any see lower water temps under the same driving conditions? (or some other actual benifit(s)).

 

Water temps? No you'll may see a reduction in under hood temps, which can help with heat soak. There is a benefit.

 

I dont think anyone will be able to quantify the benifits of the vented hoods. But based on practical observation, the hoods do vent a good amount of hot air, and engine bay temps appear to be cooler. This is based on my experience after driving the car, and popping the hood. Obviously, there is nothing scientific about my methodology.

 

one thing about vented hoods, is that you here your engine working, I had a friend with a vented hood, he wasnt FI, but the car was annoying when at idle, It was a kamanari or something like that vented hood

 

Is that why are hoods are sealed - so we don't hear the engine?

Is a vented hood any louder with a FI engine?

 

Also before buying the hood, make sure it will clear a plenum and stb if you have them. I've seen them rub on plenums.

 

after beating on my evo, when you get out of the car you can feel he heat radiating out of the engine bay through the stock vented hood. i think the hood does let off a good bit of heat, however this isn't going to help a car with a cooling system that isn't up to the its job. i'm sure it does help though, as long as the air path is well thought out and implemented. think of it like routing a clothes dryer exaust hose to your brakes from the front of your car. this is much more useful and applies the cool air exactly where it needs to be, as opposed to just cutting little holes in the front bumper to let air towards the brakes.

all in all though, i'm sure a vented hood extracts heat from the engine bay, but is it really necessary if the cooling system is doing its job flawlessly. i think most people like them for the looks. and thats completey absolutely fine as well.

 

I think it will do what sharif said better engine bay temp.

One thing i was thinking of was our intake hole that we have in our driver side. Could it be done on the other side. I think this will benefit us Greddy TT guys. Do you guys know if it could be done or has anyone done it.

 

I would like a vetned hood myself to add to look and the benefeit, but i have not see a vented hod that is that great looking on the 350z

 

Completely agree. This has been my experience and I can certainly feel much hot air coming out of those vents on my Veilside V3.

 

Is there any problem with the vented CF hood coming in contact with a SC?

 

what s/c there are a few diffrent s/c out there?

 

So I guess the next question is - what hood is the right design, won't rub, and will last. I know that you want a full carbon fiber hood (for the weight). One that I really like is the Top Secret full carbon fiber hood, but man is that a lot of money (yet, as usually - you get what you paid for).

http://store.yahoo.com/ntnsracing/topseho35.html

Any other high quality hoods I should be looking at?

 

I think it's helps with venting of heat because people are amazed at how visible the heat waves are when we're sitting idle. I never tried to take pre and post temperatures though.

 

Hey guys i think if we had more air inlet like to say instead of one engine intake hole if we had two then cold air would go in by the holes and would leave by the vents on the hood.

Has anyone made a similar holeon the passenger side to the one on the drivers side.

I think this would help alot.

Anyone???????

 

I was thinking about the front bumper, but I actally think it is better to leave it as it was designed. This is to maximize the velocity of air traveling through the radiator, since this will by far and away take more heat away from the engine than blowing air across the engine.

I think you will reduce the velocity since the air will more easily go through the hole(s) than the radiator, increasing the pressure inside the engine compartment. This reduces the pressure drop across the radiator thus decreasing the air velocity.

Also, the areodynamics of the front bumper has static points on either side of the radiator, this helps to direct more air into the radiator.

I would think vents at the top of the engine bay will help to reduce the pressure inside the engine and thus increase the velocity across the radiator. Probably not much since the air can easily escape out the bottom of the engine.
The benifits of the vents comes more into play (I think) at lower speeds (like mountain driving that I like to do). Since heat rises and the vents at the top will allow the heat to escape since there is not much air movement inside the compartment.

I will probably cut my hood instead of buy a heavier CF hood. Wish me luck.

 

lolz..i don't see any ****ty cooling effect. I have Seibon VT now. 90% for the look. Prove me wrong on this.