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mark tucker Samba Member
Joined: April 08, 2009 Posts: 23937 Location: SHALIMAR ,FLORIDA
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Posted: Fri Sep 22, 2017 1:13 pm Post subject: Re: Tropical Cylinder Air Deflector aka Super Cool tins |
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so your eating paint chips?? I try to stick to traditional corn&potato chips. |
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bnam Samba Member
Joined: July 02, 2006 Posts: 2936 Location: El Dorado Hills CA/ Bangalore, India
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Posted: Sun Dec 03, 2017 8:40 am Post subject: Re: Tropical Cylinder Air Deflector aka Super Cool tins |
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Alstrup wrote: |
Hello.
Anyways, back in the late 90íes and early 2000´s we did a comprehensive cooling test with varius solutions on a type 1 engine with regular type 1 heads. All sorts of combinations. - Small and wide cooling fan. Stock doghouse versus early. Stock doghouse versus 30 hp style. Modified type 4 cooling fan (Joe Lociero style) in type 1 housing. DTM shroud with stock - and modified type 4 fan. Porsche fan shroud etc etc. |
@Alstrup - any chance you could post the test and results? Sounds interesting and informative.
Byas _________________ 1971 1302LS Convertible (RHD) owned since '74
Click to view image
1965 Karmann Ghia Coupe - under restoration
1966 Fiat 1500 Cabrio (with 1600 Twin cam)
1952 Citroen TA 11BL |
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flyboat Samba Member
Joined: April 21, 2010 Posts: 2752 Location: Bath NC
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Posted: Mon Jan 29, 2018 5:39 pm Post subject: Re: Tropical Cylinder Air Deflector aka Super Cool tins |
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for what its worth, I tried a few different oil cooling configurations in hopes of keeping my engine alive. I had 10:1 compression 2275cc with really opened up heads and big valves. I played around with the chambers for best combustion control. I tried extra oil coolers, oil thermostats etc. And here is what I found,
Nothing performed better than the standard dog house oil cooler and all the factory tin and fan as it was designed to be used.
I was concerned that the standard factory setup wouldn't cool as it should because of my compression and engine size. I drove the freeway every day at 75-80 mph for a 1 hour and 20 minute commute. I never had an overheating problem even when I was in city traffic.
So, now I always run the factory setup no matter what, which doesn't include the Super cool tins. I am like others, I can't say they work better or not. But I can say the factory setup is amazing, _________________ 79 super Vert
62 Ragtop Bug
66 tintop Westy
Porsche 914
09 Z06 Vette track car |
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flc Samba Member
Joined: August 02, 2014 Posts: 43 Location: england
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Posted: Thu Feb 22, 2018 2:04 pm Post subject: Re: Tropical Cylinder Air Deflector aka Super Cool tins |
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Quote: |
Wrt. the flaps. Below approx 3000 engine rpm the air gets distributed a little better with the flaps compared to no flaps. Above 3000 rpm there is very little difference if any.
It is much more important to install the divider (if you use aftermarket cool tin) That alone can reduce head temps with 10-15 degrees...
Hope this helps. |
Hi , what piece do you mean by the divider?
Thanks |
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telford dorr Samba Member
Joined: March 11, 2009 Posts: 3555 Location: San Diego (Encinitas)
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Posted: Mon May 21, 2018 12:20 am Post subject: Re: Tropical Cylinder Air Deflector aka Super Cool tins |
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On the cool tin debate: it's apples and oranges.
Compare a type 1 cooling system with a type 3 system:
1) type 3 has the cool tin air deflectors under the cylinders. Air from the crank fan is ducted to the cylinder and head area. This ducting does virtually no direction control of the air, other than to make sure it gets to the heads and cylinders. The thermostat controls flaps in the fan housing exit.
2) type 1 has an air deflector under the cylinders to make the center air flow around the cylinders, and front and rear tin to control the outer cylinder air flow. The type 1 fan housing has internal air deflectors to control the air reaching the heads and cylinders. It also has thermostatically controlled cooling flaps which direct the air flow.
Thus, both cooling systems have air flow control. In type 1 engines, it's mainly in the fan housing and thermostat flaps, and less so under the cylinders. In type 3 engines, there's little control above the cylinders and heads, but much more under the cylinders and heads. Both methods get the job done - as a complete system. Logic would dictate that mixing and matching system components is just going to mess up the factory design, yielding poorer cooling performance.
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That said, if you insist on running an aftermarket fan housing that has no air ducting inside, you might recover some cooling performance by running the type 3 cool tins, as you're now closer to a type 3 system than a type 1. If you do, I'd recommend emulating ALL of the type 3 lower cooling ducting as much as possible. _________________ '71 panel, now with FI
'Experience' is the ability to recognize a mistake when you're making it again - Franklin P. Jones
In theory, theory works in practice; in practice, it doesn't - William T. Harbaugh
When you're dead, you don't know you're dead. The pain is only felt by others.
Same thing happens when you're stupid. - Philippe Geluck
More VW electrical at http://telforddorr.com/ (available 9am to 9pm PST) |
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Supercompdad Samba Member
Joined: August 10, 2019 Posts: 17 Location: West Central Illinois
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Posted: Mon Aug 12, 2019 7:55 pm Post subject: Re: Tropical Cylinder Air Deflector aka Super Cool tins |
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Thanks for the discussion, I've been researching an overheating dune buggy, it seems to have had type 1 cylinder shrouds but they were installed on the top and on the bottom of the cylinders. It overheated to the point it wouldn't start.
It's a dual port 1835 now it needs minimum, rings and maybe jugs and pistons too. |
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M. Notary Samba Member
Joined: February 19, 2004 Posts: 77
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Posted: Tue Sep 10, 2019 7:20 pm Post subject: Re: Tropical Cylinder Air Deflector aka Super Cool tins |
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Supercompdad wrote: |
Thanks for the discussion, I've been researching an overheating dune buggy, it seems to have had type 1 cylinder shrouds but they were installed on the top and on the bottom of the cylinders. It overheated to the point it wouldn't start.
It's a dual port 1835 now it needs minimum, rings and maybe jugs and pistons too. |
This cannot be real??? |
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old_man Samba Member
Joined: June 19, 2018 Posts: 1381 Location: Newfoundland
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Posted: Wed Sep 11, 2019 5:19 am Post subject: Re: Tropical Cylinder Air Deflector aka Super Cool tins |
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M. Notary wrote: |
This cannot be real??? |
You would be surprised what people do. |
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Onceler Samba Member
Joined: May 28, 2010 Posts: 1647 Location: Indiana
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Posted: Tue Nov 19, 2019 8:12 pm Post subject: Re: Tropical Cylinder Air Deflector aka Super Cool tins |
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I’m currently mocking up tins on my 2387. Seems like things change quite a bit when running 94mm cylinders. Instead of a large gap between cylinders with an air dam on the bottom (cylinder deflectors) the 94’s already have a “built in” dam built in due to the decreased spacing in the middle. So I plan to run the cool tins with modifications to route a little air around the cylinders, while making sure the heads, and particularly the exhaust ports get the most unrestricted airflow, while still providing air ducted around the outside of the cylinders with use of the cool tins. No thermostat Rube Goldberg devices, I don’t actually trust the contraption. _________________ 1972 Karmann Ghia |
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