Manual boost control (was Bleeder Vavle)

[Rocket Science Racing]

What's wrong with a manual boost controller on, say, an A4 or S4? The whole
argument that "you'll hurt it if you don't use a chip" is simply not true.
Even with a manual boost controller the engine will still detect knock and
pull timing. The only question I would have is whether or not the Audi ECU
programming has a feature that cuts fuel if it detects a very high mass flow
rate due to a runaway boost condition (my old Talon did)?

Clearly there is more opportunity to screw up as you adjust your manual
controller, and you have to have a boost gauge, but I can't think of a turbo
application that hasn't been safe and successful with one, or with the
electronic equivalent (e.g. HKS, etc.). They have many advantages: easy to
change boost, inexpensive, easy to maintain, and requires no expensive
replacement when removing for a trip to the dealer. The only disadvantages I
can think of are: you've got get your hands dirty, you need a boost gauge,
you could be tempted to "turn it up just a little more", and boost does come
on with a bang (that last also an advantage, depending on what you want).

Are Audi owners so effete that they can't get their hands dirty installing
one (this list, that drinks Pentosin for breakfast, excepted of course :-)?
Or is it simply a case of "Audi esthetics"?

st
98.5 A4 1.8Tq