If you can find me the compressor and turbine maps for the turbo it
uses I can tell you. The simple answer is likely a yes though, it very
likely can to any altitude you can actually reach with it.

Jim Akiba

On Wed, Jul 2, 2008 at 1:45 AM, Mike Miller <mwmiller@cwnet.com> wrote:
> Cool, thanks. Now to find out how much overpressure it delivers and what
> altitude it can deliver sea level pressure boost at.
>
> Hmm.
>
> Mike
>
>
> On 7/1/08 10:46 PM, "David Marshall" <mailinglist@fastforward.ca> wrote:
>
>> The AAZ is a simple waste gate control - a simple spring that opens at X
>> pressure.  In effect it should behave the same way as the computer controlled
>> one does as it doesn't compare the ambient pressure with the manifold
>> pressure.
>>
>> David Marshall
>>
>> http://www.hasenwerk.ca
>> Box 4153, Quesnel BC, Canada V2J 3J2
>>
>> Engine Conversion FAQ - http://www.hasenwerk.ca/faq
>>
>> On Tue, July 1, 2008 22:16, Mike Miller wrote:
>>> >
>>> > Thanks for the technical part of how it does what it does.
>>> >
>>> > I realized what it did in effect but what I asked was does the AAZ turbo
>>> > work this way and if it does to what altitude can it feed the engine the
>>> > full boost the engine expects?
>>> >
>>> > Mike
>>> >
>>> > On 7/1/08 7:10 PM, "David Marshall" <mailinglist@FASTFORWARD.CA> wrote:
>>> >
>>>> >> It's all relative...
>>>> >>
>>>> >> The TDI and most other modern turbo
>>>> >> engines uses a MAP or Manifold Absolute Pressure sensor.  So, in an
>>>> >> absolute vacuum the ECU will see 0 mbar - at sea level on an average day
>>>> >> you will see 1000mbar and at the top of a mountain it will be say
>>>> >> 900mbar
>>>> >> - these values are all with the engine off.  So the ECU controls
>>>> >> boost using this MAP sensor - for a stock ALH TDI this is 1950mbar for
>>>> >> maximum boost, which if you compare it to the outside air pressure, it
>>>> >> will be higher in a mountain than at sea level, but in effect, it is the
>>>> >> same amount of pressure on the inside of the manifold.
>>>> >>
>>>> >> David
>>>> >> Marshall
>>>> >>
>>>> >> http://www.hasenwerk.ca
>>>> >> Box 4153, Quesnel BC,
>>>> >> Canada V2J 3J2
>>>> >>
>>>> >> Engine Conversion FAQ -
>>>> >> http://www.hasenwerk.ca/faq
>>>> >>
>>>> >> On Tue, July 1, 2008 16:04, Mike
>>>> >> Miller wrote:
>>>>> >>>
>>>>> >>> All,
>>>>> >>>
>>>>> >>> When I had an
>>>> >> 02 TDI I was told the turbo produced more boost than the
>>>>> >>> engine
>>>> >> was set up for at sea level. This allowed full power to 5000 feet
>>>>> >>> where the boost no longer had to bled off.
>>>>> >>>
>>>>> >>>
>>>> >> Also told the 944 turbo Porsche was set up the same way.
>>>>> >>>
>>>>> >>> Anyone know is this is true and if it's true for the TD engines?
>>>>> >>>
>>>>> >>> Mike
>>>>> >>>
>>> >
>