Andrig's Aircooled Technology Still in Business

[andrig's]

I heard from a customer that he was hearing "bad rumors" about my business on The Samba, and he said that the rumor was that I was out of business.

I'm not sure who thinks I'm out of business, but I'm not, and things are starting to get exciting.

In the first week of April all the rest of the pre-orders for the Evolution One fan will be shipped out.

During that same time frame I'll be getting my first samples of the newly designed Evolution Two fan (dual inlet fan is coming back).

Performance of the Evolution One is improved over the original Lightweight Cooling fan, and gives an 11+% increase in airflow versus the originals 9%.

The newly designed Evolution Two fan, which will now be injection molded like the Evolution One, airflow tested at an incredible 28.9% increase in airflow! More than a 7% increase over the original squirrel cage design.

Besides that the velocity rings have been available for quite some time, and they perform very well too, with a 7+% increase in airflow.

I have also introduced a "Generation 2" Evolution fan shroud, with improved quality, but the same great performance.

Things are moving, and I'm hopeful that this will be a great year!

So, just so you know, we are alive and well, and you can disregard any rumor about me being out of business.
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Andrig's Aircooled Technology - https://andrigs.com/

[pondoras box]

I am interested in your cooling system and anyone with real world experience please chime in, not the people who have a friend that said etc….

You’re claiming a 63% increase in airflow and your balance of airflow over the heads and cylinders is improved over stock. How are you determining these figures? I am building a 2+ liter engine for a bus and don’t want to spend this kind of money on fancy stuff that does not improve on stock performance. But if it does then I’m in.

Cute 36HP Empi fan shrouds look cool but have decreased performance, they do not have the proper directional vanes inside to be effective. How do yours address this issue.
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Looking for anything from Hal Casey Motors out of Hamburg New York, from license plate surrounds to matchbooks.

1961 23 Window (Bobo)
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1965 13 Window (Lucas)
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1960 hardtop
1964 hardtop
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Another 65 hardtop
1973 standard bug
https://www.thesamba.com/vw/forum/viewtopic.php?t=804912
1988 Cabriolet VR6 conversion

[andrig's]

Good questions all.

I have an ASTM compliant airflow measurement setup that uses a manometer attached to the pito tube and it measures both air speed and pressure differential.

So, the measurements are repeatable and accurate, and I get both pressure and SCFM (standard CFM, which is adjusted for barometric pressure and temperature).

I spent about nine months prototyping the air directional vanes in the fan shroud to get the airflow balanced between both cylinder banks, and the correct proportion to the cylinder heads and the cylinders. Taking measurements in all four places.

The increased airflow is due to the internal design of the fan shroud, which eliminates the bulky air directional vanes of the OEM and aftermarket fan shrouds, which are attempting to act like airfoils to speed the air up, but generally just create air restrictions. It's fine for cooling a stock engine, but not so fine to cool a much higher performing engine.

The other aspect, is the air inlet is larger too, and there is no internal structure around the air inlet, allowing the maximum amount of room for the air to flow, and for the fan to operate, reducing overall inlet pressure.

If you add the velocity ring, you also reduce the inlet pressure on the larger inlet, and increase airflow another 7%.

The customers that have given me feedback have been very pleased. Depending on your engine, you may also consider running a power pulley, because it may be too much cooling. If you really need all the increase, I would recommend a poly v-belt (serpentine belt) system because you will eliminate the belt slip that occurs with the standardd v-belt.
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Andrig's Aircooled Technology - https://andrigs.com/

[andrig's]

One other thing I wanted to point out. I have tested every fan shroud that is on the market save one, which wasn't worth testing, the "RAM Air fan shroud".

What's interesting about all the aftermarket 36 hp style fan shrouds, is the air inlet is smaller than the OEM fan shroud. While they provide a bit more room inside for the '76 through '79 fan, which is slightly wider, they all choke off the air flow by having a smaller air inlet.

They all suffer from that, and it decreases the airflow by 2.3%.

The only exception to that, is the Concept 1, which is not a 36 hp style, but is a reproduction of the Mexican fan shroud from the later model Beetles sold there through 2008.

You can see my two or three part series on fan shrouds on my YouTube channel.
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Andrig's Aircooled Technology - https://andrigs.com/

[andrig's]

One final thing. Since I was putting a fan shroud together for another customer today, I figured I'd post a picture of the internals.

It at least shows that there are indeed air directional vanes, and you can see part of what I was talking about with the design.

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Andrig's Aircooled Technology - https://andrigs.com/

[TDCTDI]

How does your Evolution 1 & 2 fan assembly provide cooling to the generator/alternator?


Are there any body modifications necessary for the increase of airflow demand?
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Everybody born before 1975 has a story, good, bad, or indifferent, about a VW.


GOFUNDYOURSELF, quit asking everyone to do it for you!


An air cooled VW will make you a hoarder.


Do something, anything, to your project every day, and you will eventually complete it.

[andrig's]

They provide cooling through the alternator or generator the same way the OEM fan assembly does. The air is entrianed through the backing plates, as it uses the stock backing plates.

In terms of body modifications, none are needed for late model vehicles, if your using just the Evolution fan.

For just the fan on older cars, you can use a convertible decklid, or decklid standoffs.

In the case of the Evolution fan shroud or the Evolution complete cooling system the same two options would be recommended.
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Andrig's Aircooled Technology - https://andrigs.com/

[andrig's]

I forgot to mention how the alternator or generator are cooled for the upcoming Evolution Two fans. The custom backing plate/air inlet is open behind the alternator or generator. So, that case is really simple and the cooling is improved just because that is now a full air inlet.
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Andrig's Aircooled Technology - https://andrigs.com/

[Kudagra]

Is your fan 3d Printed? What material?
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Everything burns if you get it hot enough.

[boxer74]

[vw donvieira]

might be difficult to overcool an ACW. Cold climates=thinner wt oils. I have a DTM fan shroud on my type I and it is great but not overcooled for sure.
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"No Give Up"

[oprn]

[pondoras box]

[vw donvieira]

Oh wow!

As much as I admire your work Andrig, that statement right there could not be further from the truth! Keeping an engine running in the right temperature range is essential to proper tuning, good drivability, reducing fuel consumption and emissions and above all else... long engine life.

A cold engine is a sick engine and I see it all the time with these air cooled cars! Just take a look at all the pictures on this site of rotten case sumps. That isn't from overheated engines, quite the opposite! That is only one of many symptoms of a cold running engine.

That over cooling comment wasn’t posted by Andrig, the OP. It is someone running that wacky fan shroud from Raby’s.
I see value in your fan designs not for the fact that they will cure a factory deficient stock cooling fan because in the vast majority of cases no problem exists, I see the value in being able to get the same cooling as factory at a lower engine RPM. This means I could run taller gearing for reduced fuel consumption, less engine noise and longer engine life.

Temperature control is still vital!


Yes temp control is vital. How one controls the temperature without modern switches/valves/sensors is really the best way to do it. The wacky fan from Raby's keeps my cyl head temps adequate while pulling long hills in my bus. EInstein was wacky too.
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"No Give Up"

[oprn]

The stock thermostat system is not perfect by any means but it is the best we have to date. I would like to be able to link engine temperature to some sort of variable speed cooling fan drive. How one would do that without effecting the charging system I haven't worked out.
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Our cars get old, we get old but driving an old VW never gets old!

[pondoras box]

[oprn]

My mistake and my apologies to Andrig! I was not reading that post thorough enough to pick that up.
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Our cars get old, we get old but driving an old VW never gets old!