Turbo; JH or PL?

[fahrvergnugen at cox.net (David Utley)]

-----Original Message-----
From: LEF [mailto:rocco16@sbcglobal.net] 
Sent: Friday, January 05, 2007 7:21 PM
To: Dan Bubb; scirocco-l@scirocco.org
Larry sez...
2) By the way; free-flow exhaust on a turbo car???  :)  The turbocharger
itself is a significant flow restriction...if it weren't, there wouldn't be
any work done by the unit.  A turbocharger is about as close to free torque
as you can get, but it ain't completely free.  As some of you know, most
turbo exhaust manifolds are designed for anything but free flow.  They don't
have to be; the power comes from........boost (not free flowing intake and
exhaust systems).
--------------------

True.  However, if you don't improve flow before you get there, don't you
run the risk of increasing turbo-lag?

What's more, the Mk4 1.8T cars have all sorts of exhaust kits, -after- the
manifold you mention.  Each of them offer a 5-15 hp increase in power
(including TT, and they dyno their systems, so their figures are
trustworthy).  While you can boost to overcome the losses the turbo puts on
the system itself, would it not be wise to improve flow up to that point?

David