Just got a 00 RS...I am newbie to the older GM6/GC6 :)

The hood scoope is cosmetic only, right? Also the 4 vents on the hood have no real functions either? (scoope and vents all blocked off???)

Since it snowed hard here last night, I was so worried that the water will get under the hood...

doesnt matter if water DOES get under your hood...
not much in there that it's going to hurt.

what you dont want...
is water getting into your intake...
and that's located near your RHS fender...

many subaru owners directly spray water onto their engines to clean them off with no ill effects....

a little water coming in via the hood scoop/vents
is not going to cause you any issues :)

have fun
Jamie
www.subiegalracing.com||www.allsubaru.com

Thanks

Sounds good to me! :)

Originally posted by balajc

The hood scoope is cosmetic only, right? Also the 4 vents on the hood have no real functions either? (scoope and vents all blocked off???)


4 vents?:confused:

Doesn't matter your car should be ok

I was confused by the "4 vents" thing too... I suppose he means there are two that are split...

Anyway, most people actually take off those metal covers and have no problems. And the WRX doesn't have covers. You'll be ok.

yeah..that is what I meant, the 2 (one on each side of the hood) that are split

I poked my fiinger through the vents, and it is blocked off...

I was told, when I was new to this board, that the vents actually helped in letting the engine dissipitate heat, not by design though. And the hoop scoop does little more than act like a parachute with the backing plate still on.

PS If you take your backing plate off keep them. they are 230$ from subaur to replace.


Stu

This brought something back in my mind....

A friend (sort of) said that cars with hood scoops are SUPERCHARGED. I laughed at him......He said that the Impreza 2.5RS is SUPERCHARGED because it has a hoodscoop. He says this because hotrod muscle cars have hoodscoops for their SUPERCHARGERS.

I said, he can believe whatever he wants.....but i know for a fact that the Impreza 2.5RS wasn't SUPERCHARGED from factory. They probably don't want to mess with any 2.5RS's because the hoodscoop scared them. That was couple years ago.....

:lol: :lol: :lol:

SUPERCHARGED!:lol:

I took mine off but put them back on ONLY becaue my turbo intake is right below one of the vents and I don't want water getting in there.

But I had the bents off for over a year with no problem at all. They actually work as a heat extractor as well.

Eric

I put spacers between the vents and plates, and removed the weatherstripping, so that hot air can get out easier, but the plates still send the water to the same places, instead of all over. If you look at the vents from under the hood, you will see they have drain holes in them, so they aren't watertight in the first place. Probably doesn't make much difference (I only used 1/4" spacers, need longer studs to space any more), but it was something to do.

I wished mine was subacharged!

anyway, Ive had the vent covers off for 2 winters with no ill effects. Doesnt even get any more dirt in there either. I guess the airflow keeps the dirt from settling.

I have been taking my vents off in the summer and replacing them in the winter... I'm thinking about doing a "home depot special" and hooking up the scoop to the stock air box. Has anyone here done this? Are there gains to be had? Is it WAY loud?

MGB

Originally posted by HondaH8er
I put spacers between the vents and plates, and removed the weatherstripping, so that hot air can get out easier, but the plates still send the water to the same places, instead of all over. If you look at the vents from under the hood, you will see they have drain holes in them, so they aren't watertight in the first place. Probably doesn't make much difference (I only used 1/4" spacers, need longer studs to space any more), but it was something to do.

That's a pretty good idea.

Eric

Probably doesn't make much of a difference you say? Heh :lol:

http://www.ravensblade-impreza.com/mycar/archive/hoodvents.jpg

It makes a helluva big difference :D

Brian

Originally posted by North Ursalia
Probably doesn't make much of a difference you say? Heh :lol:

http://www.ravensblade-impreza.com/mycar/archive/hoodvents.jpg

It makes a helluva big difference :D

Brian

I was gonna postthat pic but couldn't find it for some stupid reason :)
It is still one of my favorite pics from the old-skool i-club :)

Eric

:lol:
That "Supercharged" guy is in bad need of a Donkey Punch.

:lol:

forgive the clueless question
but
other than melting snow on the hood
did the temp gauge run lower? or was there some other indication that the car was running cooler overall?
did gas mileage go up? (by reducing drag from the supercharger<g> intake)

btw, I still cant find the turbo :-) in my 99OBS, got the scoop though...

thanks
Hanna

Originally posted by Hanna
forgive the clueless question
but
other than melting snow on the hood
did the temp gauge run lower? or was there some other indication that the car was running cooler overall?
did gas mileage go up? (by reducing drag from the supercharger<g> intake)

btw, I still cant find the turbo :-) in my 99OBS, got the scoop though...


Heat is the enemy of an engine. All the left over heat from combustion needs to be dissipated. Engines have an operating temperature that they should always be run at, opening the vents means that less work needs to be put into keeping the engine cool. So no the temp gauge does NOT run lower, nor should it. The engine runs at the same temperature with or without the vents open, but it needs to do less work to keep itself cool because as the picture illustrates heat can escape!

I don't think it has a significant effect on gas mileage, anyone know for sure?

Kudos on the "no turbo" joke, I've never heard that one before.
:rolleyes:

MGB

Just to add to the "does less work to stay cool" post. The electric fan will probably have to kick on fewer times and run for shorter periods of time which means less electrical draw, which does eventually lead to increased fuel economy.

How significant it is, who can tell. But if your alternator is under a lower load, that is more hp to your wheels. Also, probably insignificant.

Well... I pulled the vent and scoop covers, and, it "feels" much smoother to drive the car now. Almost as though its "breathing" easier. :-)

And, it does melt snow on the hood faster now.

However, I pulled into the bank after driving around town a bit, and left the motor running while I went to the autoteller. The auxiliary fan came on! But it did turn off faster than usual...

So, I think its all in our heads to think it makes any difference to pull the plates. I think the hot air may be escaping just as well below the hood as above it, based on the auxiliary fan.

The aux fan never comes on while driving btw, only when stopped. At least, if its coming on while driving, I cant hear it :-)

I did notice a slight, and pleasant, increase in engine sound thru the unshielded scoop, while driving. And for purely emotional reasons, I think its very "cool" to have a vented hood.

Thanks for tolerating my turbo joke. Now where is my LSD?

Hanna

Wouldn't you risk pulling water into your engine if you did a Home Depot Chop Job and fitted a hose to the air box? It just seems like to large of a risk.

quick question, i live down in sw florida.. where it is going to start to rain like everyday till november here pretty soon.. i have an open element cone filter on the end of my intake tube on my 99 rs. if i were to remove the plates would the water saturate my air filter enough to perhaps hydrolock my engine, my 99 has the whole two air box, and two airfilter w/a maf design.. also will water effect my battery? b/c the vent on the drivers side is over top the batter?. just looking for a little info.. thanks..

Not sure about the filter(I'm sure someone esle could fill you in).
I thought the same of the battery, but have not had any issues with it. Vets covers have been off for over a year now.

ive always kept my vents off during spring/summer/fall but put them on for winter. didnt notice anything different in sound or driving but felt much better about not having fake vents...since they do do their job of cooling (at least a little). those fake scoops on mustangs and such (even the ones on many supercharged models are fake) are blocked with irremovable plastic and that always annoyed the hell out of me.

only prob with the vents open was a a party onetime someone ashed a cigarette into one...i was pissed :mad:
damn smokers

ashed a cigarette, LOL

Originally posted by BoyRacer
I have been taking my vents off in the summer and replacing them in the winter... I'm thinking about doing a "home depot special" and hooking up the scoop to the stock air box. Has anyone here done this? Are there gains to be had? Is it WAY loud?

MGB

Wouldn't try that one. If it rains at all you'll have water going directly into your airbox, and if you get enough water in the filter, right in through the TB... =BAD NEWS

Originally posted by squeeks


Wouldn't try that one. If it rains at all you'll have water going directly into your airbox, and if you get enough water in the filter, right in through the TB... =BAD NEWS

As long as water isn't pouring in, my understanding is that it's fine... Water that get sucked throught the filter would be atomized in the process, not good, but it wouldn't hurt anything either. As long as I provide a low point drain for water to get out (before the filter obviously) I think I'll be fine from a water point of view. Perhaps I should build in an extra direction change to seperate the water from the air... Isn't the stock air in take on the WRX through the hood scoop right beside the intercooler? Maybe I'm thinking of the European model.

MGB

thats why you invest in a AEM water bypass valve if you plan on running the car in all weather without the vents in.....especially with a open element cone filter

a friend of mine has a carbonfiber cold ram air intake that feeds from the hoodscoop.
http://www.rs25.com/Forums/showthread.php?threadid=5693

Originally posted by Michaelbetzel
Wouldn't you risk pulling water into your engine if you did a Home Depot Chop Job and fitted a hose to the air box? It just seems like to large of a risk.

Another member from here (i8fizh) and I built one for his my01 RS, it ran right from the TB to the scoop. It had 2 baffles and drain holes, and we never had a problem, even in major downpours. It's all in the design.

-Erik

I just wanted to revisit this...I took off the two small side vents recently...and any and all water drips right down on top of the battery and its terminals. How come nobody has addressed this? Could this become a problem?

Originally posted by Slalom RS
I just wanted to revisit this...I took off the two small side vents recently...and any and all water drips right down on top of the battery and its terminals. How come nobody has addressed this? Could this become a problem?

No one addressed it because it's not a problem. ;)

Are you concerned that water will form a circuit between the posts? A little (or even a lot) of water dripping (or spraying) on your battery won't hurt it.

Enjoy. :)

MGB