View Single Post
      10-18-2013, 09:21 PM   #8

Drives: 2012 Silverstone M3 DCT
Join Date: Oct 2013
Location: Hollywood

iTrader: (0)

All cars on the road are "drive by wire" aka electric signal from the pedal to the throttle opening so that is nothing unique. The 8 individual butterlies operate the same as a single in terms of the signal from the pedal. The difference and improvement is that air flows all the way to just above the cylinder to reach the throttle body so that when the throttle is opened, the pumping losses are less to get that air into the cylinder and it does it faster so better response. Each side of 4 open at the same time. Basically gives better throttle response and a bit more power.

Valvetronic is even better as the air gets all the way to the valve itself which modulates how much air gets in. That eliminates pumping losses typical lost in the intake plenum/throttle plate to the cylinder