vented hood+water=????
 

thinking about getting a vented hood for looks and getting some of the heat out. just wondering about what happens if i get stuck in a rain storm??? during the summer here it rains almost everyday..... is it ok to get water in the engine bay or no? thinking about scoot hood btw.

i'd like to know the same thing, i was thinking about getting a feed hood

Steam?

I can only speak from personal experience on this one. I have the authentic vented knightsport cf hood on my fd. I don't have a garage at my house so i leave the car at my friend's house that's relatively in a safe neighborhood parked on the street. Anyway long story short, vents weren't covered, barely drove it, started it up every other weekend, but it got harder to start, not sure if the mositure had anything to do with it as he lives very close to the bay. Time went by and I finally scraped up enough $$$ to do a single conversion. Upon inspection there was alot of rust, especially by the firewall where all the metal lines are. Coolent hoses were filled with rust and inside the AST, had to flush the system.

Point is, I'm sure it's safe to have a vented hood with water coming in. Just make sure your electrical components are wrapped up really good. And if you do get caught in the rain, car wash, or the likes, dry whatever you can with a towel when the engine has cooled (I didn't do that at all :wallbash: ) to get rid of any moisture in there.

Engine temps under the hood I imagined would help a great deal with the vents. If you want figures I cannot tell you, but driving in traffic at a stop I can see steam coming out of the vents as a stock hood would not allow this. Hope this helps your decision a little.

Most come with rain trays nowadays. I would never leave it wide open in the rain.

I was also worried about getting a Scoot Hood because of the front opening. I think AWD-RWD racer wants to know if anyone has had bad/good experience with that particular hood.

yup...thanks....i wasnt so much worried about the front opening as I am the top ones...they are pretty big....seems great for cooling, just dont know aboubt the water thing....does that hood come with or have available water trays?

I really wouldn't be that concerned about it, at least not while driving (if you are driving in the rain, everything under hood is getting wet anyway. However, letting it sit for long periods of time outside in rain probably will lead to things rusting faster under the hood.

Rain trays make a vented hood useless and no one is really going to go through the trouble of putting them on and off according to weather.

Your main issue would be if the battery is located in the engine bay. The people I know with that hood have their battery relocated and they have no issue with rain (whether driving or the car sitting in the rain).

However, if you haven't found posts of people complaining about it, then most likely its not an issue. ;)

While driving the only opening to worry about is the front because all the rain and water will not enter the bay from the top openings, the wind and momentum will dievert the water away from the top openings. When stoped at a light or parking it outside the top ones are the ones to worry about.

There is a duct that you can get for the scoot hood that directs the incoming air from the front opening to the turbo(s) on the passenger side(saw a pic of it somewhere). If you don't have that duct then I would worry about the scoot hood in the rain for one main reason. Ever looked directly into that duct from the front? What do you see when you do? The Alternator...

There are like 30 threads about this...

i've gotten my alternator wet many times when cleaning my engine bay and never a problem

I've got a Chargespeed vented hood and I have never had a problem with rain. Just like what a number of the other members have mentioned, letting it sit exposed to the rain for excessive amounts of time can't really be a good thing for the metal and electrical components. That rain in Florida is no joke though!

Reading this got me thinking. Has anyone actually tested a vented hood to see if it does pull the air out through the vents, oppose to sucking it in like a cowl induction hood does??

it definatly works, the angle on the fans pushes the hot air out. i can see the heat when i am at a red light. as for rain i never drive it in the rain also it is garaged. but when i wash my car i cover under the hood with trash bags, works well. the one time i got caught in the rain back in florida the bov was shooting out 5 foot sprays of steam...looked like a whales spout.

That's like asking if a 350 HP car played tug-a-war with 350 horse if it would be a stalemate...

Wait... has anyone tested this? would it be? :rlaugh:


[font=Calibri','sans-serif][font=Calibri','sans-serif]But seriouslly, a cowl works because the it's located at a high-pressure area; near the vehicle's cowl, where the curvature of the windshield creates a high-pressure zone. The vents on MazdaSpeed, Feed, etc. are located in low-pressure zones thus having the opposite effect as the a cowl inducted scoop - instead of sucking in the air in the area due to the high-pressure wanting to go into a lower-pressure area; it will push the air out of the engine compartment. This is due to the fact that the engine compartment is a higher pressure zone then that of the area where the vents is located. This can also be assisted and often times is by propper plumbing.[/font]
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I never had a problem with mine in the rain. I have a knightsport hood. Where the vents are, i think they arent directly over any connections really.

BUT i did have a problem, when i spray water over the hood when washing my car, so i guess the water shot in the vent at a weird angle and got on some electrical connections and my lights started going up and down all wonky. Still havent found the problem. I just pulled the fuse for the light motors and i sprayed everywhere with the air compressor. im going to wait a few weeks for it to hopefully dry out. then ill put it back in.

I dont know if they work for pulling air out, but you can see alot of heat rising out when ur stopped in traffic, and when ur stopped after driving. I figure it'll help not to heatsoak while you leave ur car. Thats my main concern.

While constantly moving my temps were the same between vented and not vented

I have the scoot.... drive through rain ALL the time.... no problems here

And i have put wool tufts at the top vents and yes air is directed outward while moving.

I love the hood..... Very functional

Thats what I was wondering and not an explanation of how a cowl induction hood works or how hot air rises, I know how all that works. The only way to tell anything for certain is by testing and now I don't have to do a test, thank you.