Yeah, they could be different. That's why I'm asking the question
about the AAZ.

Thought maybe someone would know. Pretty arcane I guess.

Mike

On Jul 13, 2011, at 7:45 AM, Tom Hargrave wrote:

> Since the 944 and your VW were different engines then the max boost
> and max altitude will be different.
>
> Tom Hargrave's Cell Phone
>
> -----Original Message-----
> From: Mike Miller <mwmiller6@ATT.NET>
> Sent: Wednesday, July 13, 2011 9:25 AM
> To: vanagon@gerry.vanagon.com
> Subject: Re: AAZ overboost
>
> 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
>
>
> On Jul 13, 2011, at 5:07 AM, Tom Hargrave wrote:
>
>> Now that's a different question. In the engine it was originally
>> installed
>> on the turbo will provide full boost at whatever VW documents. But
>> install
>> the turbo on another engine and all bets are off.
>>
>> This is because a turbo is a air pump with a set capacity blowing
>> air into
>> another air pump (the engine) that's drawing in air from the same
>> space that
>> the turbo is filling. Install the turbo on a engine that pumps more
>> air and
>> it can't produce as much boost.
>>
>> Thanks, Tom Hargrave
>> www.stir-plate.com
>> www.towercooler.com
>> www.kegkits.com
>>
>> -----Original Message-----
>> From: Mike Miller [mailto:mwmiller6@att.net]
>> Sent: Wednesday, July 13, 2011 5:55 AM
>> To: Tom Hargrave
>> Cc: vanagon@GERRY.VANAGON.COM
>> Subject: Re: AAZ overboost
>>
>> yeah, that's the idea.
>>
>> But I'm not asking about my [long gone] 02 Jetta. I'm asking about
>> the
>> AAZ turbo.
>>
>> Does anyone know to what altitude the turbo will provide full rated
>> sea level boost?
>>
>> Mike
>>
>>
>>
>> On Jul 13, 2011, at 12:13 AM, Tom Hargrave wrote:
>>
>>> All turbochargers can over boost but boost is regulated by the waste
>>> gate.
>>> The ability to over boost is needed to ensure quick spin-up and
>>> response and
>>> as you mentioned in your post, to provide full rated boost at higher
>>> elevations.
>>>
>>> The turbo Mercedes diesels I used to own were set to 1 BAR with a
>>> mechanical
>>> waste gate and if you knew what you were doing you could easily get
>>> 1.5 BAR
>>> of boost. 1 BAR is 1 atmosphere or about 14.5 PSI. Highway fuel
>>> economy
>>> actually increased a little with the higher boost setting.
>>>
>>> The Jetta, being a 02, may have computer controlled boost. If it
>>> does then
>>> you my be able to find a aftermarket controller to over-ride the
>>> factory
>>> curve. The 1989 Lebaron Coupe GTC I used to own was computer limited
>>> to 12
>>> PSI boost but a "off road only" performance computer swap set the
>>> boost to
>>> 15 PSI.
>>>
>>> Thanks, Tom Hargrave
>>> www.stir-plate.com
>>> www.towercooler.com
>>> www.kegkits.com
>>>
>>>
>>> -----Original Message-----
>>> From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On
>>> Behalf Of
>>> Mike Miller
>>> Sent: Wednesday, July 13, 2011 1:06 AM
>>> To: vanagon@gerry.vanagon.com
>>> Subject: AAZ overboost
>>>
>>> Does anyone know if the stock AAZ turbo provides any over boost? I
>>> had
>>> an 02 Jetta TDI that I was told would provide full boost up to 5000
>>> feet because of that over boost capability.
>>>
>>> Mike
>>> -----
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