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Old 10-10-2008, 01:22 PM   #25 (permalink)
wagonman76
Master EcoModder
 
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Join Date: Jun 2008
Location: Northwest Lower Michigan
Posts: 1,006

Red Car - '89 Chevrolet Celebrity CL 4 door
Team Chevy
90 day: 36.47 mpg (US)

Winter Wagon - '89 Pontiac 6000 LE Wagon
90 day: 28.26 mpg (US)
Thanks: 8
Thanked 17 Times in 16 Posts
Lower backpressure than stock seems to hurt low end torque, and good low end torque is good for mileage. Sure the lower backpressure helps for those who like to race, but not for us.
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Summer daily driver
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