all except diesels - snorkel on drivers side in those cases.

yours pedantically :)

alistair

On 2012-06-25, at 5:13 PM, David Beierl wrote:

> At 06:28 PM 6/25/2012, Dave Mcneely wrote:
>> Don, what is the disadvantage of the "hot stuff from the engine
>> compartment"?  The air is going into the engine to support
>> combustion, after all.  That said, my air intake is inside the
>> pillar, because it is used to cool an external oil cooler.  For that
>> purpose, I can see why cooler air is advantageous, but not if there
>> is no oil cooler involved.  mcneely
>
> All Vanagons as they come from the factory take intake air from the
> right-side pillar vent.  Syncros have a snorkel arrangement that
> allows them to ford streams, but all of them have the intake closed
> off from the engine compartment, either by a cardboard partition on
> the 1.9l or a plastic one on the 2.1l.  All automobiles make some
> effort to obtain intake air from the outside.
>
> Reason is that at, for example, 14.7 psi air pressure (29.92 in. Hg
> not corrected for altitude) 70*F air is 20% denser than 140*F air and
> will thus make it possible for an engine at a given rpm to deliver
> 20% more power.
>
> If you want to play with numbers for temp and altitude, there's a
> nice calculator here:
> http://www.stealth316.com/2-air-fuel-flow.htm   Rule of thumb is you
> lose one inch of Hg for every thousand feet of altitude.
>
> Yours,
> David