View Single Post
Old 11-11-2015, 05:24 PM   #15 (permalink)
Frank Lee
(:
 
Frank Lee's Avatar
 
Join Date: Jan 2008
Location: up north
Posts: 12,762

Blue - '93 Ford Tempo
Last 3: 27.29 mpg (US)

F150 - '94 Ford F150 XLT 4x4
90 day: 18.5 mpg (US)

Sport Coupe - '92 Ford Tempo GL
Last 3: 69.62 mpg (US)

ShWing! - '82 honda gold wing Interstate
90 day: 33.65 mpg (US)

Moon Unit - '98 Mercury Sable LX Wagon
90 day: 21.24 mpg (US)
Thanks: 1,585
Thanked 3,555 Times in 2,218 Posts
Quote:
Originally Posted by ksa8907 View Post
When i mentioned taking a theory to the limits. That is what is done with science to determine if the theory holds up at the extremes. This will tell you if your hypothesis is correct or if there are other factors.

Pressure obviously plays a role but it is not the primary concern. Maximizing the benefits of the exhaust pulses and the effect on scavenging are most important.
Right. We are talking about a system that operates at many frequencies and flow levels... not just one. It stands to reason that it will be difficult if not impossible to optimize a non-adjustable exhaust system for whole spectrum of operation. What we have now is just a rather crude compromise that delivers acceptable but not optimal results across the whole range.
__________________


  Reply With Quote