Quote:
Originally Posted by BRAISKI
Ok now that the new M3/M4 will have a "bi turbo".
What exactly is the difference? Is there a difference, since technically bi=two so 2=twin.
Is one turbo for a first range of RPM and second is the the next range of RPM. This would be interesting comparison since BMW now has a car with a Twin Turbo (N54) and a car thats called Bi Turbo (S55).
Tried searching around Google but nothing no satisfactory answer everyone seems to have some different opinions.
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Same thing. Bi=two. What you are thinking of is a sequential twin twin turbo system in which one turbocharger (smaller of the two) is specified for a lower set of RPMs to provide fast boost/response, then an actuator let's the second pre loaded turbo spool for the higher RPM range. At least that's how I remember it working. M4 appears to use a parallel twin turbo setup (two of the same turbos)