Mack largest displacement gas engine was a 707 cube 6 cylinder, 5 inch bore , 6 inch stroke, 617 lbs torque at 1200 rpm.Hall Scott had a 1091 cube 6 cylinder gas, torque rated at 960 ft lbs.Another monster was the 1197 cubic inch Waukesha 6 cylinder.I have no weights for these engines,but they must be at least 1500 lbs.I drove a Mack 707 tractor and flatbed.Slow powerful and 2 MPG.
