Here is exactly how much power the new 2020 Ford F-250 Super Duty 6.7-liter Power Stroke turbo-diesel V8 is putting down to the ground. You will be surprised when you see this, just like as we are.
This is part one of a two part series. The second part is coming soon and show the new 7.3-liter gas V8 on a dyno.
Ford has thoroughly updated their big turbo-diesel. They call it the third generation of the 6.7-liter. The engine has a new turbocharger, updated high pressure fuel injection system, new pistons, and more. Ford says their goals were to deliver more power and better efficiency. Let’s find out exactly how much power they are delivering in the real world.
This test is brought to you by our friends at 5 Star Tuning and HP Tuners. The guys at 5 Star just purchased several 2020 Super Duty trucks you see here. They will be testing these trucks in the real world for the next year in order to develop and bring you the latest diesel and gas engine tunes.
This test is a direct comparison between an older design stock 2019 Power Stroke diesel and the new stock 2020 engine.
2019 Diesel V8 (Old)
The older design 2019 6.7-liter V8 is factory rated at 450 hp and 935 lb-ft of torque at the crank. This engine is mated to Ford’s 6-speed automatic heavy-duty transmission. The guys at 5 Star take a new 2019 F-250 crew cab 4×4 diesel truck and put it on their dyno with a 30% dyno load/resistence to allow for approximately a six second dyno pull. A slightly longer pull allows the diesel engine to build boost and should produce more consistent results, according the specialists at 5 Star.
They are running the 2019 diesel in 5th gear. Here is why.
3.55 rear axle ratio * 0.85 (5th gear ratio) = 3.02 ratio @ 95 MPH.
Here are the results after three consecutive runs as measured at the WHEELS.
409.6 whp, 410.7 whp, 411.1 whp => average 410.5 whp
897.9 lb-ft, 903.5 lb-ft, 902.1 lb-ft => average 901 lb-ft of torque
2020 Diesel V8 (New)
The new 2020 6.7-liter diesel is rated at 475 hp and 1,050 lb-ft of torque at the crank by the factory. This represent an approximate 5.2% horsepower and 11% torque improvement.
The guys at 5 Star purchased a 2020 F-250 crew cab 4×4 STX. They put it on the same dyno as the 2019 truck just about 30 minutes later. The dyno load/resistance is once again set at 30%.
They are running the new 2020 diesel in 7th gear:
3.31 rear axle ratio * 1.00 (7th gear ratio) = 3.31 ratio @ 95 MPH.
Here are the 2020 results after three consecutive runs, once again measured at the WHEELS.
474.0 whp, 469.2 whp, 465.8 whp => average 469.6 whp
980.5 lb-ft, 971.9 lb-ft, 966.5 lb-ft => average 972.9 lb-ft of torque.
This represents an improvement of 59.1 horsepower and 71.9 lb-ft of torque at the wheels over the old diesel. This is an approximate 12.5% horsepower and 7.4% torque improvement at the wheels.
That’s good, but what does it mean for the estimated power at the crank? It’s safe to estimate a 20% drivetrain power loss for a heavy duty pickup truck, although we do not know the precise losses.
If you add 20% to the 2020 diesel wheel power numbers, the estimated power output at the crank comes to 563 horsepower and 1,167 lb-ft of torque.
In any case, both the stock 2019 and the stock 2020 diesels showed very impressive numbers on the dyno. Please stay tuned tomorrow, when we will publish the dyno comparison between the new 7.3-liter “Godzilla” gas V8 and the 6.2-liter gas V8 engines.
Check out the video at TFLtruck Youtube channel.