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hi,just a question..why are all american trucks(full rigs) equiped with inline six engines? over here in europe many trucks like my scania has 16litre v8 with 620hp and almoust 4000 nm.. im just curius..:smile5:
When you think of the weight of the piston assembly and compare it to the torque and HP output of the engine... The V configuration has zero wear from gravity. The 500+ Ft-LBS transferred via the rod and angle off the cylinder wall is a lot more stress/wear on the cylinder walls than the light weight aluminum piston could ever put on the walls due to gravity alone. (The ring pack puts an even high pressure all around the bore no matter the configuration.)
Here in norway its 50 000kg or 110231pounds on six axle semi trucks or the more common truck and trailer,a tree axle truck witha tree axle trailer behind it..on timber trucks its 132000pounds and some dump trucks can go with 154000p..sorry my english.. its not wery common with tandem trucks here but an axle behind the drive axle whom you can lift,thats alot better in the winter when you go empty.. up the hills you lift the rear axle,giving more gravity and grip on the drive axle:smile5:What is the max GVW there?
I believe 'haakon' is talking about "Big" Rigs, Semis!
I my driving experiences, most of the rigs I drove had in line 6's. Mack had a couple of good V-8s. Early Detroit 2 stroke 318 V-8s and later 8V92's. A 3408 Cat was one early power house. One log truck I drove for a few years had a 12V71. The big engine companies found they could make the same power and even more power with the 6 with less engine weight. And that made room for more freight.
The highways here in the US are mostly flat in the midwest as dangerousdave said. The new in line 6's produce a lot of HP and torque. And they are in the range of 500 to 625hp.
Most of the legal highway weights here in the US are 80,000 with some being 105,000.
47mph up Cajon Pass is really doing a good job!