IVECO Australia has announced an additional power rating for INTERNATIONAL® ProStar® models, providing buyers with a new 600 horsepower (447 kW) / 2,050 lb.ft (2,779 Nm) option, along with the existing 550 horsepower (410 kW) / 1,850 lb.ft variant (2,508 Nm) rating.
The additional power has been achieved via calibration changes to the ProStar’s 15 litre Cummins X15 engine, in a successful joint project between INTERNATIONAL’s Australian engineers and the team at Cummins South Pacific.
INTERNATIONAL® Engineering Manager, Adrian Wright, said the additional output rating was a logical step in offering prospective customers a second power option if the application required it.
“For the initial development program, we focused on the 550 horsepower / 1,850 lb.ft rating, as this was the most commonly specified in the B-Double conventional market segment,” Mr Wright said, “but it was always our plan to look at the 600 horsepower rating at a later stage.
“With increased ProStar® sales activity and a growing enquiry rate on both 550 and 600 horsepower ratings, the timing has worked well.”
In bringing the 600 horsepower option to market, Mr Wright said that there was close collaboration between INTERNATIONAL’s local engineering team and Cummins South Pacific.
“We re-evaluated a full production spec truck and tested it extensively both on the road and on the dyno,” he said.
“The truck performed exceptionally well and easily met all of Cummins’ stringent requirements for Australian heavy haul applications.
“The 550 horsepower engine is a strong performer but the additional torque of the 600 horsepower engine will allow the truck to hold a higher gear for longer which can be advantageous for certain applications and can even help save fuel in some circumstances.”
Both engine ratings can be specified across the entire ProStar range encompassing ‘Tipper’, ‘Day cab’, ‘Extended cab’ and ‘Sleeper cab’ models, with either the Eaton 18-speed manual transmission or Eaton’s clever ‘UltraShift Plus’ 18-speed automated manual.