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copbait73 copbait73 is offline
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Join Date: Nov 2003
Location: Chesterfield IN
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Well as much as 911 purist do not like to admit it the intake system for the 911 moved from the sexy individual port induction design favored by European performance engineers to what they considered a crude common plenum long favored and well know to those in the US. This happened in mid '73, 37 years ago.

Racing was going good, but for the street they had emissions, CIS and this damn common plenum. They had a lot of ground to make up, all during a time when the air-cooled motor was scheduled for obsolescence. It's entirely possible they threw up their arms and said “bumsen Sie es gerade fügen einen Turbolader hinzu” (loosely – “screw it, just add a turbocharger”). I say don't try to make sense of their actions during this timeframe.

Where does that leave the 930 motor? For racing Porsche kept what they knew about porting vs. cams vs. carburetion, even into Turboing. If you want that level of performance follow the concepts in their racing Turbo motors.
Old 02-02-2010, 02:59 PM
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