hood scoops...

[etlsport]

what hood scoop setup would be best for lowering underhood temps (esp at idle)?

i was thinking cowl induction scoops facing the windshield were good for removing hot air.. but then thinking about it.. wouldnt a forward facing scoop remove air just as well (ie both of them will just have a hole in the hood underneath and all the scoop does is cover the hole) plus the forward facing hood has the added benefit of drawing cool air in while driving...

comments?

[Ldub]

Funny you should ask... :p
See my "got a few things done" thread for particulars, but at idle, I can feel a steady stream of hot air coming from my recently completed (rear facing) hood scoop project. And that's with a "diverter plate" in place under the actual hole to channel rain away from the top of the engine.

Also, I've read in posts from the long ago, about people having frost melt off their windshield during winter months using similar mods.

[etlsport]

yea ldub thats what got me thinking about it.. i was thinking that you would probably get the same stream of heat out of the scoop if it was facing forward though, especially sitting still

i didnt think about the window defrosting aspect of the rear facing scoop though.. very cool :cool:

anyone with a front facing scoop chime in here? did it lower your underhood temps/can you feel heat coming out while sitting?

[VehiGAZ]

A rear facing scoop will blow hot engine air into toward you interior-air intake at the base of the windshield, making it hot and stinky inside. On the other hand, it will suck hot air out of the engine bay while running, drawing more air through the grill.

A forward-facing scoop will force cooler air into the engine bay while running.

Neither would do much at idle, I think.

I'm considering a small one on the front left corner of the hood to feed the air filter (if I go cone). I have to get the hood repainted, so why not do it then?

[Ldub]

A rear facing scoop will blow hot engine air into toward you interior-air intake at the base of the windshield, making it hot and stinky inside.

HA...speak for your own bad smelling engine... :p mine has the smell of rose petals with just a hint of lilac & magnolia blossoms at idle. :rolleyes:

OK, seriously...I've noticed no difference in cabin smellocity since doing this, but, by comparison, I am a few years older than most around here & have been a smoker most of my life...so it stands to reason that I may not notice as much.

BUT...on the other side of the coin, I'll be all over any fuel leak that may occur ! ;)

[Knigh7s]

I'm thinking about going down this route with that C/F hood I picked up last December. The scoop is a perfect location to do open air filter with a heat shield mod. plus the exhaust vents in the center...I just need to figure out how to keep the rain out... not that it rains in Vegas!!! (actually rained the past week)...

With the VX an off center scoop looks nice in my opinion...

http://www.wetzelwerks.com/LauretteAndDavid/TRANSFER/Rally/Garland_VX2.jpg
From this thread (http://vehicross.info/forums/showthread.php?t=10793&highlight=ute)

[WILLY]

I like mine quite well though it serves no purpose but cosmetic at the moment, i have planned on cutting a hole under it to make it do what it looks like its doing lol that sounds funny :p
http://www.vehicross.info/gallery/data/500/05-Photo_5.jpg

[Knigh7s]

@Willy

That actually looks pretty sweet!

[circmand]

while all these look very cool I am planning a transmission cooler instead of a scoop. I just can't bear to give my VX unnecesary cosmetic surgery

[etlsport]

im with u circmand... i dont think i could cut up my hood... the scoop is for my buddy's jeep cherokee... he was gonna come offroading at the next vx meet but when he sits idle his wt regularly hits 250+ and underhood temps (intake temp) gets up over 200... no place to put an extra fan.. so he wanted to try a cowl scoop to let the air out

[WormGod]

I am running induction with the C/F WRX style scoop. Something I noticed after putting the S/C in is, the lower cabin where driver and passenger side legs rest gets pretty toasty. I dont think the induction cools anything at all because the cool air blown in has no place to go, so it just warms up and starys there, heating up everything around it. Unsure of the exact technicalities involved though. I thought about putting the OEM insert back on to see what difference that makes. If anything, the pic of the VX desert crawler above shows something that may be more operational. Though it looks like the induction there vacuums to the air filter, something similar that can pull in air to cool and then an extraction (like the pic and possibly something like the EVO hood has), MAY draw out the warmed air.

I have a few kits I bought to fab up and test out that ill test a dual induction/extraction but I have yet to get to work on it. If it works out, I will be more than happy to share. Anything to get rid of the "hot legs" complex in the VX now.

[JHarris1385]

I think for the VX since it is unsual an strays from the norm that is left on the street. I would personally prefer a non-typical hood scoop/extractor set up. Kind of a combo of both what willy and Ldub has but mixed with the above rally VX.

I have always thought about this mod. But i just dont trust anyone with my hood but myself and I dont feel like cutting into it either. Just yet that is.

More or less I would like a forward facing induction above the air box and rear facing extractor on the insert. But then I run into messing up my precious IronMan logo.

[tom4bren]

Why go so high tech? Can't you pick up a blower like they use in boats and pick up the hot air from the engine and blow it out the back? You could even get creative and only have it come on at idle but I don't know what sensor you would pick off that signal.

LDUB - I thought I was the old fogey on this forum at 47 & one grandkid. Looks like you got me beat. How does the dark side of the hill look?

Willy - Yours looks great. How did you do your hood scoop?

[WILLY]

I dunno! :confused: it was there when i got the vx.

[etlsport]

tom, what is the blower you are talking about? sounds like it could be a simple solution to his overheating problem

[tom4bren]

Any boat over 15 feet (I think) is required to be equipped with a blower to vent the engine compartment. It's probably just a very small squirrel cage blower & electric motor. It may even come with some of the duct pipe.

I'll look on the SeaDoo to see just how big it is.

Here is a sample of what I'm talking about:

http://www.outdoorsuperstore.com/product.asp?manufacturer=ATTWOOD&model=TURBO+4000+IN%2DLINE+BILGE+BLOWER&cat=62202

It's about $30.00 and uses 3" ID hose.

One of the reasons that this set up would be ideal is that it is already marine grade & designed for mounting in the engine compartment. Water ain't going to hurt it & it's designed to operate in a potentially explosive atmosphere so those pesky gas fumes aren't a concern.

[Chopper]

NACTA ducts. Don't dirty up the airflow, and provide lots of air. Plus, I think they can be set up to pull or push. Standard equipment on most GT and LeMans cars. Wayne You can place them where you want, pretty much. Incomming at the conefilter, extraction at the rear.

[Ldub]

I dunno! :confused: it was there when i got the vx.

It's a Lund Eclipse, available from JC Whitney & lots of other vendors...maybe ck out ebay. ;)

And I agree with Chopper...NACA ducts would be ideal for dumping fresh air into the air box...I've gone as far as laying them out on my hood & began fabbing the necessary sheet metal...but then, I dunno, other stuph came up that seemed more important. :rolleyes:

http://www.vehicross.info/gallery/data/500/DSC00726.JPG

[tom4bren]

I stopped by boaters world on my way home yesterday and picked up the blower I was talking about and 10 feet of 3" hose. Total cost $37.78. Now I need to check into a temperature switch so I can test the concept. What temp would Y'all like for the fan to kick on at (I'm guessing 180)?

Finding the temp switch is proving difficult. Everyone carries cut off switches (NC) but no one seems to carry the cut on (NO). I have one lead & will keep looking.

I have to start over with the fan though. I gave the one I bought to my son so he could cool the amps in his car (KIDZZZ!!!)

[Chopper]

Wow...I promised no more drunk E-bay ing after the "54 Ford pickup" (I'll show you pix soon, got the '84 Corvette donor car for the driveline and suspension bits). Need to get the metal blasted. No more VX posting behind "Bigfoot" Barley Wine..........Dub's got it........but that passenger side duct, serves no purpose. Move it back and turn it around, use it for an extractor. Use the intake,right over the filter. You want that extractor back in the tumble air.

[Ldub]

No more VX posting behind "Bigfoot" Barley Wine.......Dub's got it........but that passenger side duct, serves no purpose. Move it back and turn it around, use it for an extractor. Use the intake,right over the filter. You want that extractor back in the tumble air.

Heh...you're far from the only guilty party when it comes to "buzzed posting" ;) ...just that you're one of the few who'll admit to it. :cool:

I'm liking the extra extractor idea, have to see how non-linear I can get my brain to function when I finally get around to "the operation".

[tom4bren]

I found a switch that cuts on at 160F and cuts off at 140F. Does that sound like the right temp range? That was the highest temps that this distributor listed.

[WILLY]

I'm a buzzed thread poster lol and i am at buzzin at the moment wooo hoooo
partay!!!! :smack: ;party: :dance: :clap: :_beer: :_steering