2011 Volvo VNL with D13 (with 1.4 million miles)
The AirDog with the Champ II provides the low-end torque that enabled me to properly re-ratio my rear-ends to leverage the engine’s downspeeding capability, giving me almost one mile per gallon fuel efficiency gain. My truck originally came from the factory at 500hp/1650 torque. Now, with the AirDog and Champ II, I have more of each, even with the engine set at 425hp/1550 torque plus re-ratioing the rears to 2.47. More low-end power, increased productivity, more enjoyable to drive, and one mile per gallon fuel savings. The AirDog was the key to putting this truck in its best form ever!
Aerodyne Transportation LLC
2020 Volvo VNR
I was pretty skeptical that adding the AirDog to my D11 powered Volvo VNR would increase low RPM pulling power to the degree it has. Adding the AirDog has resulted in fewer downshifts and improved fuel efficiency.
Now after I installed my AirDog, my last 800 mile fill, I got 7.4 mpg. Current fuel mileage is up .4 mpg and shifting much less now with the AirDog installed. When the truck was in a Volvo shop, the shop service manager commented about how smooth the engine sounded. He was quite impressed.