View Single Post
Old 11-09-2011, 12:16 AM   #18 (permalink)
t vago
MPGuino Supporter
t vago's Avatar
Join Date: Oct 2010
Location: Cedar Rapids, IA
Posts: 1,766

The Karen-Mobile - '05 Dodge Magnum SXT
Team Dodge
90 day: 26.72 mpg (US)

Fiat Dakota - '00 Dodge Dakota SLT RWD Quad Cab
90 day: 16.67 mpg (US)

The Red Sled - '01 Dodge Durango SLT 4WD
90 day: 16.96 mpg (US)
Thanks: 799
Thanked 682 Times in 437 Posts
See, that's the funny thing about calculating a volumetric flow rate of air. What's its pressure? What's its temperature?

Volumetric flow rate by itself is meaningless when throttling is considered. It's the mass flow rate that actually matters, and if you have a large volumetric flow rate at 20 inHg vacuum on one side of a throttle valve, it's equivalent to about about a 2/3 slower volumetric flow rate at atmospheric on the other side of the throttle valve. In both cases, though, the mass flow rate is the same - it has to be.
The Fiat Dakota

The Karen-mobile

The Red Sled