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R&DvwENG
Samba Member
Joined: January 18, 2008
Posts: 92
Location: East of Dallas Texas
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 Posted: Mon Aug 04, 2014 5:04 am Post subject: |
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| I think ovals rear vent area is bigger than the later bugs and the rear scoops for ovals would be different shaped. |
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fescamillarojas
Samba Member
Joined: November 28, 2008
Posts: 24
Location: Yuma, AZ
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| Posted: Fri Aug 15, 2014 5:12 am Post subject: |
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If you have a Split / oval era vert deck lid grill, you can use the same
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blue65
Samba Member
Joined: March 10, 2016
Posts: 123
Location: Melbourne Australia
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| Posted: Fri Apr 15, 2016 6:19 am Post subject: |
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| 62dcw wrote: |
| I believe it's a 1 piece fiberglass scoop that fits across the rear air vents under the window of type 1 bug? Kind of causes a ram air effect. |
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arizonabuckeye
Samba Member
Joined: November 10, 2013
Posts: 544
Location: SLC
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| Posted: Fri Apr 15, 2016 12:37 pm Post subject: Re: Rear Air Scoop |
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| Where is that scoop from? |
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herbie1200
Samba Member
Joined: April 27, 2006
Posts: 833
Location: Rome - Italy
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| Posted: Mon Apr 18, 2016 2:26 am Post subject: Re: Rear Air Scoop |
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Are you sure those items are air-scope?
I suppose they are only a protection against rain for the original air inlets, and you are mounting them upside down. |
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arizonabuckeye
Samba Member
Joined: November 10, 2013
Posts: 544
Location: SLC
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| Posted: Mon Apr 18, 2016 1:54 pm Post subject: Re: Rear Air Scoop |
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| herbie1200 wrote: |
Are you sure those items are air-scope?
I suppose they are only a protection against rain for the original air inlets, and you are mounting them upside down. |
The side angle on these wouldn't allow you to mount it upside down. |
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stewardc
Samba Member
Joined: August 06, 2005
Posts: 73
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| Posted: Sat Jun 25, 2016 3:48 am Post subject: Re: Rear Air Scoop |
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I had one of these on a 60 356 powered monster. Never seen one since. |
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koko522723
Samba Member
Joined: August 28, 2016
Posts: 4
Location: Nomadic
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DreamWeaver
Samba Member
Joined: January 19, 2012
Posts: 178
Location: Melbourne Australia
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| Posted: Mon May 04, 2020 1:47 am Post subject: |
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After a set of these rear (airstream) air scoops.
Any leads, info or contacts will be much appreciated.
I've contact some of the collector 'heavies' and have been told these were (or seemed to have been) plentiful / common 10years ago.
Its the last accessory I'm chasing - Thanks guys
| RareAir wrote: |
Here's a set like the ones I just sold fitted to a Beetle
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fescamillarojas
Samba Member
Joined: November 28, 2008
Posts: 24
Location: Yuma, AZ
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| Posted: Fri Dec 01, 2023 9:07 am Post subject: Re: Rear Air Scoop |
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Hard to find. But if you are patient, a kit will arrive...
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vamram 
Samba Member
Joined: March 08, 2012
Posts: 7304
Location: NOVA
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| Posted: Fri Dec 01, 2023 9:54 am Post subject: Re: Rear Air Scoop |
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Where did you find them?
_________________
Eventually, "we are what we pretend to be.’”
Give peace a chance - Stop Russian-Soviet Aggression!!
'74 Super 9/16 - present, in refurb process.
'73 Super - 6/18 - Present - Daily Driver!
'75 Super Le Grande...waiting it's turn in line behind '74.
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Save the Supers!! |
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Hogg
Samba Member
Joined: March 30, 2013
Posts: 7
Location: Willamette valley
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| Posted: Sat Dec 02, 2023 1:20 pm Post subject: Re: Rear Air Scoop |
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| I had one like Volkswagenut on my '61 with a stock DP 1600. That was back in 1972. Memory doesn't serve why that happened exactly; maybe I heard that the 1600 needed more air. Anyway it was driven a couple years including cross country without problem. One does need to be mindful of collecting snow. I wondered later if it was of any benefit at all, especially during stop and go driving. Altering the German engineer's design can be counter productive, but apparently these air scoops are at best harmless. Just my 99 cents. |
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fescamillarojas
Samba Member
Joined: November 28, 2008
Posts: 24
Location: Yuma, AZ
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| Posted: Sat Dec 02, 2023 1:35 pm Post subject: Re: Rear Air Scoop |
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I found them at The Samba.
I live in Yuma AZ. Summer is hot. I have been using these air intakes for over 10 years and they help keep the 1600 of my old bug 61 cool. |
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Hogg
Samba Member
Joined: March 30, 2013
Posts: 7
Location: Willamette valley
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| Posted: Sat Dec 02, 2023 3:46 pm Post subject: Re: Rear Air Scoop |
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| Validated then. I can't imagine a better stress test than Yuma AZ for cooling. |
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zerotofifty
Samba Member
Joined: December 27, 2003
Posts: 1559
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| Posted: Sun Dec 03, 2023 10:33 am Post subject: Re: Rear Air Scoop |
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The scoop can also become a leaf trap, thus blocking the cooling vents, so check frequently for leaves if you are around trees. Besure that water cannot pool in them also, as that can lead to body rust.
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zerotofifty
Samba Member
Joined: December 27, 2003
Posts: 1559
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| Posted: Sun Dec 03, 2023 10:38 am Post subject: Re: Rear Air Scoop |
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| fescamillarojas wrote: |
I found them at The Samba.
I live in Yuma AZ. Summer is hot. I have been using these air intakes for over 10 years and they help keep the 1600 of my old bug 61 cool. |
If you have a bigger motor with the bigger fan, I found it needed to prop open the deck lid a bit for added cooling in a sedan with a non louvered deck lid. At low speeds the scoop may not help much, thus a louvered deck lid or deck lid stand off may still be required.
My deck lid is stood off at the bottom so as to avoid leaf collection that can happen with a top stand off. I live in a leafy area.
The deck lid stand off made a marked improvement at high engine speed, high load condition Bug acceleration improved, maintaining speed on steep hills up improved. Prior to the deck lid stand off the engine choked as the carb was robbed of air by the fan and lack of adequate engine bay air inlet size.
_________________
Give peace a chance. No American war with Russia! |
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viiking
Samba Member
Joined: May 10, 2013
Posts: 2668
Location: Sydney Australia
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| Posted: Sun Dec 03, 2023 2:58 pm Post subject: Re: Rear Air Scoop |
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I would be reluctant to add a scoop in that location thinking that it will work. They look cool, but are they cool!
Here's my reasoning, some of which has already been noted by others.
1. The German engineers had so much experience with their car's body it is unlikely they would NOT have added similar scoops if there were advantages in doing so.
2. The scoop will upset the smooth air flow over the top of the body and create an area of turbulence at the scoop where ordinarily air flow would have been streamlined. Indeed introducing such turbulence at the scoop may in fact have created a zone of low pressure which could in fact ROB air from the scoop rather than create a "ram jet". The proof would have to be by wind tunnel or at least some tell tale ribbons like they have on yacht sails.
As far as this quote.....
| Hogg wrote: |
| Validated then. I can't imagine a better stress test than Yuma AZ for cooling. |
Someone's well meaning "I reckon" is hardly "validation".
3. Even if there is some "ram jet" effect, there is no guarantee that the extra air will in fact do anything. The fan is limited by how much air it can pump into what is a pretty sealed engine compartment, assuming that all the seals are in place as they should be. Yes propping open the deck lid will allow more air flow due to reducing the air compartment air pressure (effectively negating the effect of proper tinware and engine seals) but that is the reason the engine runs cooler not necessarily the ram jet effect.
Similarly, did cabriolet's come out with more engine vents before the sedans? I think probably because the normally streamlined air flow over the body was affected and even made worse by the overhanging folded up soft top and hence they ran hotter than their standard body siblings.
4. The vast majority of the cooling at speed happens by the higher air flow UNDER the car (versus the slower air OVER the body) where the rushing air cools the exposed magnesium/aluminium block and thin walled pushrod tubes. Adding an impediment to the air flow OVER the top of the car may possibly reduce the cooling capacity.
5. I'm struggling to think of too many production vehicles that have air scoops to cool the engine at the back. Don't think Porsche do it. Yes there are scoops on water cooled front engined cars or on high performance race cars. The comment that they really only work over 40mph is probably more to do with the fact that higher speed exchanges more heat than at a standstill.
6. Great marketing. I've got this new product. It's a flux capacitor. Trust me, it works because I told you it does. I've tested it to 88mph and it really makes you feel like you're speeding through time.
But each to their own. If you want one, get one. I'm just dubious about the science behind them. If someone can show me some repeatable evidence and calculations then I will happily change my mind.
_________________
1968 1500 RHD Lotus White Beetle since birth. In the hospital for major surgery
1966 Lancia Flavia Pininfarina Coupe - in the waiting room
Discharged: 1983 Vanagon, 1974 1800 Microbus,1968 Low Light,1968 Type 3 |
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DreamWeaver
Samba Member
Joined: January 19, 2012
Posts: 178
Location: Melbourne Australia
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| Posted: Thu Dec 07, 2023 11:01 pm Post subject: Re: Rear Air Scoop |
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| fescamillarojas wrote: |
Hard to find. But if you are patient, a kit will arrive...
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Another set? well done! |
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DreamWeaver
Samba Member
Joined: January 19, 2012
Posts: 178
Location: Melbourne Australia
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| Posted: Thu Dec 07, 2023 11:06 pm Post subject: Re: Rear Air Scoop |
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| viiking wrote: |
I would be reluctant to add a scoop in that location thinking that it will work. They look cool, but are they cool!
Here's my reasoning, some of which has already been noted by others.
1. The German engineers had so much experience with their car's body it is unlikely they would NOT have added similar scoops if there were advantages in doing so.
2. The scoop will upset the smooth air flow over the top of the body and create an area of turbulence at the scoop where ordinarily air flow would have been streamlined. Indeed introducing such turbulence at the scoop may in fact have created a zone of low pressure which could in fact ROB air from the scoop rather than create a "ram jet". The proof would have to be by wind tunnel or at least some tell tale ribbons like they have on yacht sails.
As far as this quote.....
| Hogg wrote: |
| Validated then. I can't imagine a better stress test than Yuma AZ for cooling. |
Someone's well meaning "I reckon" is hardly "validation".
3. Even if there is some "ram jet" effect, there is no guarantee that the extra air will in fact do anything. The fan is limited by how much air it can pump into what is a pretty sealed engine compartment, assuming that all the seals are in place as they should be. Yes propping open the deck lid will allow more air flow due to reducing the air compartment air pressure (effectively negating the effect of proper tinware and engine seals) but that is the reason the engine runs cooler not necessarily the ram jet effect.
Similarly, did cabriolet's come out with more engine vents before the sedans? I think probably because the normally streamlined air flow over the body was affected and even made worse by the overhanging folded up soft top and hence they ran hotter than their standard body siblings.
4. The vast majority of the cooling at speed happens by the higher air flow UNDER the car (versus the slower air OVER the body) where the rushing air cools the exposed magnesium/aluminium block and thin walled pushrod tubes. Adding an impediment to the air flow OVER the top of the car may possibly reduce the cooling capacity.
5. I'm struggling to think of too many production vehicles that have air scoops to cool the engine at the back. Don't think Porsche do it. Yes there are scoops on water cooled front engined cars or on high performance race cars. The comment that they really only work over 40mph is probably more to do with the fact that higher speed exchanges more heat than at a standstill.
6. Great marketing. I've got this new product. It's a flux capacitor. Trust me, it works because I told you it does. I've tested it to 88mph and it really makes you feel like you're speeding through time.
But each to their own. If you want one, get one. I'm just dubious about the science behind them. If someone can show me some repeatable evidence and calculations then I will happily change my mind. |
Its more a form then function thing. I got a set, not because of the perceived function but totally because of the form and rarity (especially here in Australia). However when I have my oil temper gauge rewired ill post up any notable differences in tempreature with or without the scoops  |
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