Vented Hood Water Question
 

Hello, I just got a VIS carbon Fiber Vented hood yesterday and I was wondering if it would be a problem when water gets into specific part. I have attached picture and circled in red pen.

Will there be problem if water gets on there?

Please help!

This is how vented hood looks like

OP, that's the least of your concerns. Those are grounds.

Intake should be a concern and alternator. And those aren't really concern either. So you should be all good

These two images should help.

First up is the VIS I believe, closes shot I can get to that area:
http://www.octanemotorsports.com/images/CRC-1058521.jpg

Second is a shot with areas where the Seibon TS hood vents are located which is about on par with the VIS hood locations (just smaller vents):
http://www.the370z.com/attachment.ph...1&d=1405368210

As DE mentioned, your circled area is of no concern at all. Getting water there is no worse then getting water anywhere on the chassis of the vehicle.

For typical rainfall you dont really need to be concerned about anything unless your air filters are gratuitously exposed or become submerged.

In those occasional water apocalypse from the sky moments, I might be concerned with standing water buildup around certain engine components and avoid driving the car. Such as perhaps in the valvecover area and dripping around the coils into the plug wells and hell even then I dont know if it would matter. Last time I *personally* saw a wet engine cause problems was when cars had spark plug wires.

About 50,000 miles with my vented hood (Seibon TS Style) and the only annoyance I have is my engine is all water spots and dried car wash soap.

I have the Carbon Creations Hot Wheels (I'm not sure they are the same) hood shown above and the only two problems its caused were both mods to the car. The Stillen supercharger has a vent on the top that allows water into the oil, and a dead Aquamist relay that got wet. If the car is stock you shouldn't have any problems, I fixed both of mine with sheet metal covers.

That hood design is almost 'over-vented'... I prefer the JP-R hood for effective venting with minimal water intrusion...

http://img.tapatalk.com/d/14/05/29/8aguby7u.jpg

http://img.tapatalk.com/d/14/05/15/ta6amega.jpg

The vents are big on my hood but I was looking for max air flow for cooling on the track not looks and it does a great job at that.

Short term, water on the ground crimp connectors is no problem - if it shorts to ground, who cares? Over time, it will promote oxidation/corrosion of the wire and connector. Shouldn't be a problem unless you drive in a lot of rain. A good coat of paint or other non-permeable coating will help but probably not worth the effort.

An interesting thread would be one that showed what was under the vents of different hoods. I'm going with the Varis Arising II. Going to try and find a top-down and see if they sit over my turbos.

http://www.the370z.com/members/arrva...ero-kit-23.jpg

I feel like those vents are too far forward. Sure, they vent the air coming out of the radiator but they don't do anything for heat further back.

The headers are producing the most heat, they're too far forward to cover those.

My car is NA, but those vents on the sides sit just in front of the headers behind where the stock air boxes go. The centre vent is slightly behind the rad and before the coolant overflow. The heat coming out of those is crazy after a long drive. I have also had rain gather on the hood while at a stop light. As soon as a pulled away, the rain literally shot out of the hood with the force of the air coming out of the vents.

Yes and no.
The venting of the headers is probably a very difficult task, hence why most ceramic coat and/or wrap them to just push the heat farther down the exhaust and keep engine/header separation as much as possible.

Now there still has not been any 'real' data provided on the 370z of where our high heat points are, pressure zones, and what venting certain areas actually do. From just slapping on a Seibon TS hood and doing some pre-vented hood data logs and some post, I have seen some solid temp drops or better temp management. The other result I have notice is my most forward vents extra the most hot air, while the farther back ones do very little (I am sure they help but not as much as the front).

Further forward the better. Further back you actually hurt the car as you block off the air moving through the radiator. The back air is actually sucked out of the engine bay and under the car. Airs trying to go through but it's hitting a wall of incoming air from the back. This is why the Evo, new corvette etc all have the vent as far forward as possible. Its a high vs low pressure area thing. These hoods with all the venting and huge openings all over probably do more harm than good. Its just a show peice. Hotwheels didn't use a multimillion dollar wind tunnel like Chevrolet did.

I agree with the above posts. My centre vent just pours out the heat.

The back two vent on the hot wheels hood are useless as they are over the brake a battery box so I covered mine with lexan. The front 4 helped my oil temps greatly, it used to climb fast any time I stopped but it's very slow now and as soon as I start moving it starts dropping. They haven't been tested side by side so no one knows what hood works best on our cars but I promise you it's not a show piece, if it was I would have already replaced it!

The jpr hood comes with drip pans installed under the side vents, basically cuttting off air flow thru anywhere except the centre vent. I opened mine for better venting at stops and idle. Racers might want to keep them covered for maximum extraction from the centre vent.

Good post but I would also consider that different style vents will have individual perks at different levels of airflow/speed. Whether the consumer matches the airflow modifications to their application or not, or even has the information to do so... probably not in most cases. But we can at least be fairly certain there is another dimension to it.

Example, I am personally guessing that the vents of larger surface area, regardless of consideration to placement, should allow more heat to escape in applications such as idle, auto-x, and other "low speed" environments where there is not enough airflow to achieve a venturi effect or buildup of air pressure at the cowl. What speed these events occur, I have no idea. But I would say that there is probably a changeover that occurs somewhere on the speed axis where the style and placement of the vents needs to begin shifting to avoid areas of high pressure, or other concerns that I am unaware of.

Lol but you just proved my point. It is a show piece. You've already blocked off the back two going from a show piece to a more function piece. And it doesn't matter where the vents are in stopped traffic. Any vent on the hood will keep temps from climbing to fast since there's no movement of air when stopped, heat WILL pour out as hot air rises. The important thing is when moving does it work? With the back two blocked off I say yes.

Ok so I guess the lower temp are in my imagination? I'm not saying they didn't add the third one for looks but my car runs cool in south Florida summer and that's a fact not opinion. If large vents don't work why did it bring the temps down? I ran the car at Sebring a few weeks ago where temps were in the high 90s and 85% humidity and when pulling in the pits you can see the heat coming out the vents like a hot asphalt road. While heat rises the size of the vent still controls the volume that can get out.

http://img.tapatalk.com/d/14/07/16/a8adu3eh.jpg

This is the other side.


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A center vent would have done nothing for my car because the the intake pipe for the Stillen supercharger would block it from flowing any air.

Not sure why you had to say this. I just said "I say yes." When moving I say yes with the back two blocked off it will work. It's not your imagination since I'm agreeing with you but only since you've modded the hood will I agree.

That is a reasonable observation.

Yep. The base of the windshield is a high pressure area. That's how cowl induction hoods get their air for the intake. If the vents are at the very rear of the hood. Don't think they would be good at moving air.