Turbo; JH or PL?

[jdbubb at verizon.net (Dan Bubb)]

Improving the exhaust is a particular area where modification can improve a 
turbo's performance.
A turbo is driven by not only heat input but pressure differential across 
its turbine. Reducing exhaust back pressure improves turbo response and 
compressor outlet pressure with no additional work done by the engine to 
drive the turbo.

But by all means lets not consider the engine and its parts as a system. 
Let's just hang a turbo on there and crank up the boost. Never mind that the 
response is shitty due to exhaust back pressure and that the maximum boost 
the engine can run is limited due to all the heat created by the engine and 
turbo working against multiple restrictions.
Just turn up the boost until it fails then declare that this crappy VW short 
block can only sustain 200 Hp!
Yep, you can crank up the boost to make more power. But only to a certain 
level.
The standard performance improvements for an NA engine apply to an FI engine 
in that they not only improve performance but also allow the engine to 
operate at a higher boost level due to reduced internal stresses and 
internal heat.
Dan

From: "LEF" <rocco16@sbcglobal.net>
Sent: Saturday, January 06, 2007 8:18 AM
Subject: Re: Turbo; JH or PL?

  You can add power this way.  It's your choice; add 10hp by installing an 
exhaust kit, or do it by turning up the boost by .5psi.
  That's my point.
  (by the way, don't put TOO much faith in hp figures seen in ads for 
aftermarket speed parts....this applies to even our favorite vendors. 
"Where money is concerned, accept no statement at face value.")
  larry
  sandiego16v