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914World.com _ 914World Garage _ rear fender air intake scoops
Posted by: toon1 Oct 15 2006, 01:55 PM
I am thinking about doing this.
They would be small so it doesn't look like a rice racer, I like the idea of getting fresh air into the engine bay.
who's done this?? got any pics??
Posted by: Rough_Rider Oct 15 2006, 02:28 PM
Not mine but you might be able to see the huge scoop on the right rear fender.
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Posted by: toon1 Oct 15 2006, 02:35 PM
that's a radical teener! I'm thinking along those lines, in the same location but smaller.
Posted by: Andyrew Oct 15 2006, 02:41 PM
his car rocks... 383 stroker... fully built to handle it. nuf said.
Posted by: race914 Oct 16 2006, 07:55 AM
I'm wanting to get cold air into the engine compartment too...
Here is a pic of napa ducts being used for rear vents.
Posted by: Dave_Darling Oct 16 2006, 08:36 AM
Those would be "NACA" ducts. NACA (National Advisory Council on Aeronautics) being the predecessor to NASA.
Another air intake on the rear fender:
http://members.rennlist.com/bluethunder/
I've seen pics of one with a 1st-gen MR-2 scoop in one or both sides, as well.
All that only looked "OK" to me....
--DD
Posted by: hmeeder Oct 16 2006, 08:47 AM
Hope you plan something a little cleaner and more integrated than this car.
Apologies if it's someone here.
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Posted by: dmenche914 Oct 16 2006, 09:47 AM
Consider a scoop from the engine lid up to the roof, Your'd only need to modify the engine lid, not the body, if that is important to you. i have seen some like that, they look ok!
Posted by: race914 Oct 16 2006, 09:49 AM
Dave,
Thanks for the correction! I've been in 'wine country' way too long....
Greg
Those would be "NACA" ducts. NACA (National Advisory Council on Aeronautics) being the predecessor to NASA.
Another air intake on the rear fender:
http://members.rennlist.com/bluethunder/
I've seen pics of one with a 1st-gen MR-2 scoop in one or both sides, as well.
All that only looked "OK" to me....
--DD
Posted by: toon1 Oct 16 2006, 09:57 AM
I like the size of the air intakes on the yellow car. It looks like it can be covered by a small fairing and the overall apperance would be subtle. I don't wan't the rice racer bolt on acessary package. Functionality is what I am after.
Are these avail. for purchase or is it a one off, design as you go type thing??
I am thinking of an oil cooler on the pass. side, inside the fender well and a fresh air intake for both the motor and the engine compartment on the other.
Posted by: race914 Oct 16 2006, 10:09 AM
They are available http://www.pegasusautoracing.com/group.asp?GroupID=DUCTNACA as well as many other vendors
I like the size of the air intakes on the yellow car. It looks like it can be covered by a small fairing and the overall apperance would be subtle. I don't wan't the rice racer bolt on acessary package. Functionality is what I am after.
Are these avail. for purchase or is it a one off, design as you go type thing??
I am thinking of an oil cooler on the pass. side, inside the fender well and a fresh air intake for both the motor and the engine compartment on the other.
Posted by: 914-8 Oct 16 2006, 10:48 AM
Hope you plan something a little cleaner and more integrated than this car.
Apologies if it's someone here.
Now THAT's a NAPA (or maybe Pep Boys) duct!
Posted by: jd74914 Oct 16 2006, 10:56 AM
Hope you plan something a little cleaner and more integrated than this car.
Apologies if it's someone here.
Now THAT's a NAPA (or maybe Pep Boys) duct!
nope, this is a Pep Boys duct (I just love PO things lol)
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Posted by: Rough_Rider Oct 16 2006, 12:13 PM
now this one is mine 
a simple naca duct bonded into the fibreglass flares.
Connects to a 3" pipe that runs into a modified 911 intake chamber.
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Posted by: 914helo Oct 16 2006, 12:21 PM
Do you have to worry about rain with those scoops?
Posted by: jd74914 Oct 16 2006, 12:30 PM
Just out of curiousity how much air do the naca ducts actual suck in?
Posted by: maf914 Oct 16 2006, 12:55 PM
Just out of curiousity how much air do the naca ducts actual suck in?
I think you have to have pretty smooth airflow over the surface for NACA ducts to work well. Supposedly they allow air intake with much less drag than a scoop located in the airstream.
On NASCAR stock cars I always wonder how well the three NACA ducts work located in the rear side window behind the open drivers window. I know the NASCAR guys use plenty of wind tunnel time, but it looks like the airflow after the drivers window would be turbulent. I think these feed brakes and oil coolers and they probably have fans attached as well, so the flow must be adequate.
Posted by: mrdezyne Oct 16 2006, 12:55 PM
This is a very nice job by WRTHBEGO I think. They are fully functional and look like they belong.
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Posted by: toon1 Oct 16 2006, 12:59 PM
now this one is mine
a simple naca duct bonded into the fibreglass flares.Connects to a 3" pipe that runs into a modified 911 intake chamber.
I like it!! It was hard to get a visual of how it would look on a street car.
The version on the red car is not too bad either, other that the bolt on look.
Has anyone ever used the center tunnel as a duct??
With a little creative plumbing it might work
Posted by: jd74914 Oct 16 2006, 01:03 PM
now this one is mine
a simple naca duct bonded into the fibreglass flares.Connects to a 3" pipe that runs into a modified 911 intake chamber.
I like it!! It was hard to get a visual of how it would look on a street car.
The version on the red car is not too bad either, other that the bolt on look.
Has anyone ever used the center tunnel as a duct??
With a little creative plumbing it might work
If the red car you're talking about is mine I'm planning on working it into the body so it doesn't look quite so bolt on. I just have to figure out how to do that (and I also have to fins the things, I lost them when I took them off at the beginning of my restoration
)
Posted by: toon1 Oct 16 2006, 01:37 PM
now this one is mine
a simple naca duct bonded into the fibreglass flares.Connects to a 3" pipe that runs into a modified 911 intake chamber.
I like it!! It was hard to get a visual of how it would look on a street car.
The version on the red car is not too bad either, other that the bolt on look.
Has anyone ever used the center tunnel as a duct??
With a little creative plumbing it might work
If the red car you're talking about is mine I'm planning on working it into the body so it doesn't look quite so bolt on. I just have to figure out how to do that (and I also have to fins the things, I lost them when I took them off at the beginning of my restoration
)Hey jd74, did you get them at pep boy's, ? do you have a part number??
Do you have any pics of how it's plumbed into the engine bay?
Posted by: jd74914 Oct 16 2006, 03:31 PM
IDk where they were bought, sorry. They also have no plumbing as of yet. I was planning on leaving them unused for now because my eventual goal is to put a /6 in so I would like to put oil coolers in them.
Posted by: JPB Oct 16 2006, 03:45 PM
Hope you plan something a little cleaner and more integrated than this car.
Apologies if it's someone here.
Now THAT's a NAPA (or maybe Pep Boys) duct!
nope, this is a Pep Boys duct (I just love PO things lol)
Red and Westerns
What ya got for tires bro?65s?
Posted by: jd74914 Oct 16 2006, 03:51 PM
Red and Westerns
What ya got for tires bro?65s?Its got 165/85's on it now
They are the old 70s michelin tread pattern. I need to replace them before I register it, but first it needs paint. I think I streched the fenders just enough to fit 205s in. I'm not sure she's going to stay red tho, she was originally signal orange so I'm debating between red and going back to that color.
Posted by: Air_Cooled_Nut Oct 16 2006, 10:45 PM
It's not, it's smooth.
Posted by: tyler Oct 17 2006, 01:11 PM
The Boxster ones looked pretty good to me and I want to put them in but I lost the auction for all 4 pieces and now all I see for sale is the grilles - anyone know where there's any for sale?
Posted by: szuccaro Oct 17 2006, 01:43 PM
My current and prior cars... one functional, one non-functional. Steve
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Posted by: toon1 Oct 17 2006, 02:11 PM
My current and prior cars... one functional, one non-functional. Steve
The one that was fuctional, what was the function? did it make a difference?
Posted by: JPB Oct 17 2006, 03:21 PM
Red and Westerns
What ya got for tires bro?65s?Its got 165/85's on it now
They are the old 70s michelin tread pattern. I need to replace them before I register it, but first it needs paint. I think I streched the fenders just enough to fit 205s in. I'm not sure she's going to stay red tho, she was originally signal orange so I'm debating between red and going back to that color.
If you are leaning twards orange don't look back bro because thats a very tough and hot color. Go for it!
Posted by: Geezer914 Nov 13 2014, 09:01 AM
Firebird Trans am fender scoops
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Posted by: brant Nov 13 2014, 09:13 AM
what problem are you actually trying to solve?
most of the race cars that do this, are feeding a tranny cooler or specific cooler that requires the air flow
Posted by: Jetsetsurfshop Nov 13 2014, 10:48 AM
what problem are you actually trying to solve?
most of the race cars that do this, are feeding a tranny cooler or specific cooler that requires the air flow
Yeah, I'm thinking the same thing. Maybe to your carbs?
Posted by: Mark Henry Nov 13 2014, 11:38 AM
If just one of those small ones put it in the rockers.
Posted by: Phoenix-MN Nov 13 2014, 06:21 PM
If just one of those small ones put it in the rockers.
Posted by: wndsrfr Nov 13 2014, 07:11 PM
Here's "Buttercup" with the styling that was done by PPO....
I opened them up to actually provide flow to the rear brakes....
next shot is from inside the fenderwell looking forward.
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Posted by: nsyr Nov 13 2014, 08:13 PM
I like the rocker idea.
Posted by: r_towle Nov 13 2014, 11:24 PM
Dis
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Posted by: barefoot Nov 14 2014, 06:46 AM
Part of FG body kit. I'm installing external oil cooler in there.
Posted by: GregAmy Nov 14 2014, 08:00 AM
Firebird Trans am fender scoops
I've seen John's dirty bird quarter-panel scoops in person...look real nice, well done.
Posted by: Geezer914 Nov 14 2014, 10:26 AM
The only problem with scoops in the rocker panel is picking up a lot more dust and water from the road surface.
Posted by: Elliot Cannon Nov 14 2014, 10:38 AM
The only problem with scoops in the rocker panel is picking up a lot more dust and water from the road surface.
For what it's worth, that has never been a problem with mine.
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Posted by: nsyr Nov 14 2014, 04:02 PM
Does that help with getting air into the engine. I have always felt that the engine compartment is a low pressure zone, starving the engine for air at higher speeds.
Posted by: VegasRacer Nov 14 2014, 05:57 PM
Sister.
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Posted by: damesandhotrods Nov 14 2014, 06:43 PM
Does that help with getting air into the engine. I have always felt that the engine compartment is a low pressure zone, starving the engine for air at higher speeds.
Porsche didn’t seem worry about it with 914-4 even when they raced when it when it was new. They didn’t open up the engine lid until they raced the 914-6…
Posted by: 57lincolnman Nov 14 2014, 09:24 PM
I am thinking about doing this.
They would be small so it doesn't look like a rice racer, I like the idea of getting fresh air into the engine bay.
who's done this?? got any pics??
I put a small scoop recessed into the rocker panel on the passenger side. It's low and very discrete. I took the stock rockers ones off and put on the ABS ones that say PORSCHE on them. It was easy to cut out the section I needed for the scoop. Just to make sure I had clearance in that recess between rocker and face of frame. I have A/C so I had to reroute the hoses to get the clearance. I suppose you could use it with the stock metal rocker but it would be harder. I put a hose connection on the back of the scoop that is routed underneath and goes to an auxiliary oil cooler with a shroud to make sure all of the ducted air blows across the oil cooler. It works great in the summer. I live in Atlanta and in 90+ summer temps the oil stays at 210-215 tops. In cooler weather like now I close it off with a rubber drain stopper (not very elegant but it works) because the oil wouldn't get to 180 otherwise. I can send pics if you like.
Posted by: Elliot Cannon Nov 14 2014, 11:18 PM
Does that help with getting air into the engine. I have always felt that the engine compartment is a low pressure zone, starving the engine for air at higher speeds.
Mine is ducted to an oil cooler below the rear trunk.
Posted by: Chris914n6 Nov 15 2014, 12:02 AM
Here's something I was playing with. Enters thru the little grilles. 
Posted by: tomeric914 Nov 15 2014, 08:06 AM
Not 914 but:
http://forums.pelicanparts.com/porsche-911-technical-forum/214250-another-cooling-enhancement-idea-roof-scoop.html 
Posted by: effutuo101 Nov 15 2014, 09:59 AM
Here is a pic of mine. I have to finish the inside boxes for the air intake.
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Posted by: Mike Bellis Nov 15 2014, 10:57 AM
Posted by: Dave_Darling Nov 15 2014, 11:38 AM
Here's something I was playing with. Enters thru the little grilles.
Reminds me of Charlie Davis' setup:
Read about it here: http://members.rennlist.com/chuxter/TempTests.htm
--DD
Posted by: boxsterfan Nov 15 2014, 09:35 PM
For anyone who has used the Naca duct on the rocker, how did you route back behind it?
I was often thinking that when I restore my car I wanted to get rid of the jack posts completely on both sides. Put Naca ducts in the rocker panels where those would be. Cut a large enough hole in the long (where the jack post plate used to be) and connect to the tubes (normally used for heat). Either route those up to the engine bay for fresh air intake or point them at the trans or external oil cooler.
Then just put in electric heat. Simple. 
Just kidding about electric heat. Maybe heated seats though.
Posted by: 57lincolnman Nov 15 2014, 09:45 PM
Here is my solution. NACA duct cut into rocker panel with hose connection routed to auxiliary oil cooler. No problems with dust or water. Subtle and powerful. The NACA duct is very efficient to suck in air.[ Keeps oil at 210 degrees even on hottest days. In the colder months I close up the duct. attachmentid=475909]
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Posted by: 57lincolnman Nov 15 2014, 09:51 PM
For anyone who has used the Naca duct on the rocker, how did you route back behind it?
I was often thinking that when I restore my car I wanted to get rid of the jack posts completely on both sides. Put Naca ducts in the rocker panels where those would be. Cut a large enough hole in the long (where the jack post plate used to be) and connect to the tubes (normally used for heat). Either route those up to the engine bay for fresh air intake or point them at the trans or external oil cooler.
Then just put in electric heat. Simple.
Just kidding about electric heat. Maybe heated seats though.I posted pic that shows the hose routed to an auxiliary oil cooler that is shrouded to maximize air flow across the oil cooler. To get the space needed, I used Tangerine Racing street exhaust system which gives more room on the passenger side for the oil cooler to be mounted in a near vertical position.
Posted by: Jetsetsurfshop Nov 16 2014, 11:24 AM
I did this for my rear cooler too. Check post #43 for route pictures. That's three inch duct work. I moved my oil cooler to the front of my car. May keep this for a trans cooler, not sure yet.
http://www.914world.com/bbs2/index.php?showtopic=227027&st=40
Posted by: carr914 Nov 16 2014, 12:47 PM
Here's something I was playing with. Enters thru the little grilles.
Just go through the Sail Panel
Posted by: veekry9 Nov 17 2014, 04:52 AM
Sure,with side mount rads,intercoolers,you would need inlets/scoops/ducts.
http://www.fiero.nl/forum/Forum3/HTML/000116-28.html
Posted by: aircooledtechguy Nov 17 2014, 11:03 AM
Apples and oranges here since my car is not a Porsche body, but these are the NACA ducts on my car.
I'm no mechanical engineer nor did I ever take a physics class. . . With that said, the NACA ducts on the Squarsche work better than I had anticipated. 
Before the latest revamp of the car with stock cooling, I would see a spike in head temps above 60mph (400F and climbing). Once I added the NACA ducts, head temps usually sit at or below 350F (have never gone over 375F) and above 70mph, the engine runs cooler 290-325F (even with the higher engine speeds and higher load).
NACA ducts not only work well, but in my experience they become more efficient with speed and just work better and better by design.
Posted by: mr2by4 Nov 17 2014, 03:32 PM
http://www.ebay.com/itm/Porsche-914-NO-RESERVE-1970-porsche-914-914-8-chevrolet-350-5-spd-911-fuchs-911-4-wheel-disc-gt-/301392644559?forcerrptr=true&hash=item462c66c9cf&item=301392644559&pt=US_Cars_Trucks
Big scoops on a v8 conversion.
Posted by: GeorgeRud Nov 17 2014, 05:29 PM
Why not go all out?
Posted by: Larmo63 Nov 17 2014, 07:01 PM
I can only imagine her "scoop."
Posted by: veekry9 Nov 17 2014, 09:15 PM
a nice lookin flare/scoop.
So nice,more than kindergarten crude,better than crayons.
Posted by: veekry9 Nov 18 2014, 05:08 PM
A 914 door,tail lights.Neat-o headlamps.
A scoop of orange sherbert.
Posted by: 76-914 Nov 19 2014, 08:52 PM
NACA vents aren't air scoops per say rather inlets. They are to be placed in high pressure areas for max efficiency. The faster the air movement about them the better they work. Any AE's here that have done any wind testing on these birds?
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