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aerostealth · 01-15-2015, 02:32 PM

Yes we are using .452 BSFC per HP hour for the truck. We are assuming gasoline weighs 6.138 lbs per gallon and that our drive line loses are .893. So for the 18.2 MPG at 80 MPH our formula is

80/18.2 = 4.395 x 6.138 = 26.98/.452 = 59.68 x .893 = RHP 53.3

These are useful working assumptions as you say. At 150 MPH the truck would have to get just under 5 MPG to make these numbers work. Phil has data that says these numbers change faster you go. The relationship is not fixed the faster you go. I would have to let him address that.

01-15-2015, 02:32 PM	#6 (permalink)
aerostealth Master EcoModder Join Date: Dec 2014 Location: Radium Springs, NM Posts: 465 Ford XLT Naked - '14 Ford F-150 XLT 90 day: 15.04 mpg (US) Ford G-4 with Stinger - '14 Ford F-150 4X4 Super Crew XLT 90 day: 19.8 mpg (US) Ford Stealth G-4 - '14 Ford F-150 4X4 Super Crew XLT 90 day: 16.15 mpg (US) XLT Towing Keystone 5th wheel trailer - '14 Ford Keystone 5th Wheel XLT 90 day: 9.03 mpg (US) Trip 2015 C Max Energi - '15 Ford C Max Energi SWP 90 day: 38.2 mpg (US) Local 120 volt 2015 C-Max Energi - '15 Ford C-Max Energy SEL 90 day: 55.65 mpg (US) Local 240 volt 2015 C-Max Energi - '15 Ford C Max Energi SLE 90 day: 57.63 mpg (US) Energi Combined - '15 C Max Energi Leather 90 day: 51.2 mpg (US) MoonDust for Travel - '19 Chevrolet Bolt LT 90 day: 123.11 mpg (US) MoonDust 3 with 90% CE - '19 Chevy Bolt LT 90 day: 127.57 mpg (US) Ecopia IV - '19 Chevy Bolt Lt 90 day: 126.39 mpg (US) Ecopia IV Trip Log - '19 Chevy Bolt LT 90 day: 121.01 mpg (US) Rate Rider Chevy Bolt - '19 Chevrolet Bolt LT-2 90 day: 123.16 mpg (US) Teal Force One 70% - '24 Hyundai Ioniq 5 SEL 90 day: 98.52 mpg (US) Teal Force Two 90% - '24 Hyundai Ioniq 5 SEL 90 day: 118.16 mpg (US) Thanks: 2 Thanked 528 Times in 278 Posts	Bsfc Yes we are using .452 BSFC per HP hour for the truck. We are assuming gasoline weighs 6.138 lbs per gallon and that our drive line loses are .893. So for the 18.2 MPG at 80 MPH our formula is 80/18.2 = 4.395 x 6.138 = 26.98/.452 = 59.68 x .893 = RHP 53.3 These are useful working assumptions as you say. At 150 MPH the truck would have to get just under 5 MPG to make these numbers work. Phil has data that says these numbers change faster you go. The relationship is not fixed the faster you go. I would have to let him address that.