View Single Post
Old 01-12-2012, 02:35 PM   #27 (permalink)
drmiller100
Master EcoModder
 
Join Date: Dec 2011
Location: Boise Idaho
Posts: 842
Thanks: 39
Thanked 89 Times in 69 Posts
Quote:
Originally Posted by Old Tele man View Post
...a "tuned" intake uses acoustic(length)/mass(diameter) inertia to cram as much air INTO the cylinders as possible.

...a "tuned" exhaust uses acoustic(length)/mass(diameter) inertia to extract as much exhaust OUT of the cylinders as possible.

...working 'together' it's possible to achieve >100% volumetic efficiency...but, ONLY at the "tuned" engine speeds!
and only at WOT and only when the exhaust temperature is "correct".
  Reply With Quote