Velocity Ring for Fan Shroud

[HappyJack]

Has anyone installed a velocity ring (vortex ring;  Venturi ring) on your fan shroud?  The sellers of these things claim significant temp. reduction due to the vortex effect of the air flow over the bell-shaped exhaust opening in the shroud with this ring installed.

Here’s a picture and write up (a.k.a. marketing) from the Awesome Powder Coat site.  Sounds a lot like MAGIC, huh?  Any experience with this method of reducing engine temperature?

Thanks,  Jack

To get the maximum possible cooling out of your VW 
you need a velocity ring (also called a volute ring, or 
just a cooling ring). This is an American made model 
fuel injected fan shrouds.  Cooling is improved by increasing the air velocity 
through the fan. The rings are all stainless steel 
construction, with spot welded mounting tabs and a 
satin black power coated finish. They can be installed 
on any factory or aftermarket doghouse fan shroud by 
welding or rivets.

A version for the early fan shroud is also available.

* Made in Ohio, USA
* All Stainless Steel Construction
* Works on all Doghouse Style VW Engine Tin

*Improves engine cooling

[edward ericson]

I’m skeptical…

[Ed Service]

VW installed it on all 1975 and newer fuel injected bugs so it’s gotta be good! right?

[Author]

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