DON - Most of my driving experience in BIG TRUCKS was simple, hold the gas pedal to the floor with your right foot, If you couldn't, USE BOTH FEET.
Never been in a truck or tractor with an exh temp gauge that worked. Big truck engines are tuned real conservative, the 903 Cummins I drove most the time probably only made 5-6 pounds of boost, the naturally aspirated version was 250 or 270 HP and with the turbo version like mine, the VT-903 was only 320. They made a version, the VT-350 that was 350 HP for trucks and other versions for the military up to 600 HP. It was a nice driving truck, only had a 6-speed Spicer transmission, had 4.44 gears set to run 67 MPH @ 2500 RPM, got about 4 to 4-1/4 MPG grossing 75,000# half the time and the other half empty weighing about 27,000#.
I imagine you drive the Pyro about like driving for MPG, build speed down hill then hold the gas pedal down until you see 1150-1200 on the pyro then let up and if the hill is steep & long enough drop a gear and plant your right foot again.
Buddy or co-worker towed a HEAVY U-Haul trailer from Moline, IL to Athens, GA years ago with his '88 F250 4X4 with an early 7.3 IDI diesel, all stock, no blower or chip, etc. BIG steep hill on the Interstate right around Louisville, KY, He hit the bottom doing about 85+ in 5th gear and was down to around 1700 RPM in 4th thinking about dropping into 3rd by the time he got to the top. His truck, trailer, cargo grossed probably 24,000#. Not bad for a 185 HP truck.
Never been in a truck or tractor with an exh temp gauge that worked. Big truck engines are tuned real conservative, the 903 Cummins I drove most the time probably only made 5-6 pounds of boost, the naturally aspirated version was 250 or 270 HP and with the turbo version like mine, the VT-903 was only 320. They made a version, the VT-350 that was 350 HP for trucks and other versions for the military up to 600 HP. It was a nice driving truck, only had a 6-speed Spicer transmission, had 4.44 gears set to run 67 MPH @ 2500 RPM, got about 4 to 4-1/4 MPG grossing 75,000# half the time and the other half empty weighing about 27,000#.
I imagine you drive the Pyro about like driving for MPG, build speed down hill then hold the gas pedal down until you see 1150-1200 on the pyro then let up and if the hill is steep & long enough drop a gear and plant your right foot again.
Buddy or co-worker towed a HEAVY U-Haul trailer from Moline, IL to Athens, GA years ago with his '88 F250 4X4 with an early 7.3 IDI diesel, all stock, no blower or chip, etc. BIG steep hill on the Interstate right around Louisville, KY, He hit the bottom doing about 85+ in 5th gear and was down to around 1700 RPM in 4th thinking about dropping into 3rd by the time he got to the top. His truck, trailer, cargo grossed probably 24,000#. Not bad for a 185 HP truck.