MPG update -> After PCM tuning
Senior Member
Joined: 01-13-2006
Posts: 3,000
From: Superior, WI - Over the Hill Warranty Club member
It is available Here --> http://chevyhhrworld.com/ChevyHHRWorld_Tune_Center.html
Member
Joined: 11-28-2008
Posts: 93
From: Phoenix, AZ
31.1 MPG on 1,051 highway miles on cruise control set at 71 MPH in an HHR SS Automatic, 2 full tanks of gas, 93 octane pure highway driving from NC to NJ and back,
POST GM Performance Tune upgrade.
All I can say is im very impresses, and mostlikely attribute it to a slightly the slightly higher boost levels (-2 to -5 psi) the car cruises at now after the GM Tune. More air mixed in with the same amount of fuel gives a bigger explosion with more horsepower. Kinda like Blacksmith 101, use the bellows to put more air in the fire to create a hotter fire!
POST GM Performance Tune upgrade.
All I can say is im very impresses, and mostlikely attribute it to a slightly the slightly higher boost levels (-2 to -5 psi) the car cruises at now after the GM Tune. More air mixed in with the same amount of fuel gives a bigger explosion with more horsepower. Kinda like Blacksmith 101, use the bellows to put more air in the fire to create a hotter fire!
Thread
Thread Starter
Forum
Replies
Last Post