Basic specs are free and open to everyone They usually include engine images, displacement, dimensions and weight, essential bolt tightening torques, characteristics of the engine e.g. its power and torque. Essential bolt tightening torques are main bearing cap bolt torque, connecting rod cap bolt torque and the cylinder head bolt torques.
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EPA = United States Environmental Protection Agency | US EPA.
For now, we'll only look at the following example, QSX15-G
From: EPA executive order number 'u r-002-0415' Feel free to examine more cases.
EPA executive order number 'u r-002-0415' results for Cummins QSX15-G Engine Family = 7CEXL015.AAH Code = 3087:FR10568 Model = Cummins QSX15-G Max Power = 600 hp @ 2100 rpm Fuel Rate mm/stroke at peak HP = 317 lbs/ hour at peak HP = 224.5 Max Torque = 1425 lb.ft @ 1400 rpm Fuel Rate mm/stroke at max torque = 408 lbs/hour at max torque = 192.5 Click for Cummins engine manuals and specs
What does it all mean?
For our purposes we need only use one value from the results, and that is the fuel rate at max power i.e. at 600 hp.
Max Power = 600 hp @ 2100 rpm
Fuel Rate lbs/ hour at peak HP = 224.5
Therefore = 224.5/600 = 0.37 lbs/hp hour.
Which is not too bad, and translates to somewhere between our naturally aspirated table and our turbo table for fuel consumption.
This means that the Cummins QSX15 uses around 30 US gallons per hour or 110 liters per hour at full power, and of course, correspondingly less for more relaxed use.
Click for Cummins engine manuals and specs
Fuel Consumption Units and calculations:
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