Quote:
Originally Posted by stownsen914
I've noticed that some builders of very high output NA 911 motors are putting GT3 plenums on top of their ITBs. The factory has put plenums even on non-restrictor motors. I don't know enough to comment intelligently on specifics, but there must be something to it.
|
Porsche put a resonance intake system on top of ITBs on the 993 RSR normally aspirated race engines.
Gunther Werks uses the 996 GT3 intake with ITBs on their specials 993 cars and Singer uses that same intake on most if not all of their cars.
The idea being to gain midrange torque using the resonance to fill the cylinders faster/more efficiently in certain RPM ranges which improves drivability. I am not sure what happens at the top end.