Like Tom mentioned, if this is important to you and you want to ensure a
desired boost output at a certain altitude, then simply install a manual
boost controller, like this
one<https://lh4.googleusercontent.com/-K4Q_83MuzUA/Th20ERBZepI/AAAAAAAAAlE/l9WS1iy7aso/s640/606%252520boost%252520controller.JPG>I'm
running on an OM606 being prepped for an install.  The boost
controller
and a cockpit boost gauge would allow you to dial in the boost performance
you like.  If you're thinking of increasing max boost, I'd also recommend
installing a cockpit pyrometer to monitor EGTs as well.

On Wed, Jul 13, 2011 at 7:25 AM, Mike Miller <mwmiller6@att.net> wrote:

> I'm talking about the AAZ turbo on the AAZ engine.
>
> There is no VW documentation regarding what altitude it provides full
> boost to. Wasn't on the Jetta either, the mechanic at the dealer said
> so. The only documentation on this I've ever seen was a Porsche ad on
> the 944 turbo [I think, might have been the 924, long time ago] which
> said 5000 feet.
>
> Mike
>
>
>
>
--
Casey