Why is the s4 called a biturbo instead of twin turbo?
#3
Explained....
A biturbo is one turbo dedicated to each bank of cylinders (half of the V). A twin turbo is two turbochargers for all cylinders. Usually in twin turbo setups, you have one turbo (somewhat small) that kicks in at low RPMs and then a bigger one that kicks in at mid revs. Still, you have 2 turbos pushing all cylinders. In biturbo setups, each turbo pushes one-half of the cylinders. Make sense?
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#9
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I'm just glad is dosen't have a emblem that says "bi" turbo!
And only knowledgeable autofiles know what it is!<p>David
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