I recently installed a Holley Sniper TBI EFI system instead of the original carbs on my 84 RRC 3.5. All working great and the system has a little display with a whole bunch of readouts, one of them is 'lbs of fuel per hour'. I had a fairly long drive on Texas flatlands with various speeds so I decided would it not be fun to records the steady lbs/hour for a bunch of different steady speeds? If anything I could use it to check for tuning improvements.
Since LBS of fuel can be translated to USGAL per hours and speed is Miles per hour obviously it is not particularly difficult to calculate MPG. I am recording about 18-20 MPG(US) between fuelling so actually seems to be fairly accurate. Doing some research and (in America) 18-20 MPG (US) is in fact fairly average for an SUV. Most people though would have more power to play with and probably drive more aggressively as well..
Since LBS of fuel can be translated to USGAL per hours and speed is Miles per hour obviously it is not particularly difficult to calculate MPG. I am recording about 18-20 MPG(US) between fuelling so actually seems to be fairly accurate. Doing some research and (in America) 18-20 MPG (US) is in fact fairly average for an SUV. Most people though would have more power to play with and probably drive more aggressively as well..
