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Old 03-20-2011, 11:48 PM   #5 (permalink)
zonker
50 mpg Fiat 500 Project
 
Join Date: Jan 2011
Location: Temecula, CA
Posts: 173

'99 Ford ZX2 S/R - zonker - '99 Ford Escort ZX2 S/R
Team ZX2
90 day: 28.75 mpg (US)

'89 Dakota LB - blue - '89 Dodge Dakota V6 LE
90 day: 19.8 mpg (US)

'17 Fiat 124 - SunFiat - '17 Fiat 124 Spider Classica
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engine vacuum readings only tell part of the story. lower engine vacuum can be a more economical choice.

the increase in engine rpm requires more power just to turn the motor.

and higher rpm means more injector firing events just to maintain the same air/fuel ratio, even though they are smaller amounts due to the higher engine vacuum.

Last edited by zonker; 03-21-2011 at 12:02 AM..
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