On Fri, Apr 12, 2013 at 6:52 AM, kimbrennan@mac.com <kimbrennan@mac.com>wrote:

> Vw switched to water cooling for the same reason Porsche did (eventually)
> on the 911. Emissions.
>
>
  That may have been part of the reason for VW but I know for a fact that
Porsche gave up  trying to make a dependable and powerfull enough air
cooled engine (motor?)...For  a couple of years during the transition from
Air cooling to water cooling they even made a Porsche similar to the WBX,
engine-wise  kind of half and half.......the 993....notorious for blowing
it's heads off...
  Watching one of the last aircooled Porsches, what they always call 911s,
run against a newer water cooled Porsches, also sometimes called 911s,  you
will easily see why they made the switch...