The difference in the 3-400 HP pickup engine and the semi's engine is about a 1000 foot pounds of torque at 400 HP. My cat truck engine is 550HP @ 1850 torque with peak torque at 1200RPM and peak HP at 1600RPM. Rated engine speed is at 2100RPM. A bit of difference from that pickup engine running 400HP @ 2800RPM with peak torque at ??? . I think my old 6.9 runs peak torque at around 1400RPM and runs out at about 2800RPM engine speed.
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Today's Featured Article - New Life for an Old Allis - by Tyler Woods. My friend Jon, has an old '39 Allis Chalmers B. He thought it a marginal tractor that had long since served its time. She smoked terribly and never had much power but he couldn't afford another so he was limping along with what he had. Jon's Allis has a small front loader and though it doesn't carry much, it serves his needs. It was the hard starting and low power that made him think it was time to replace the old girl. Jon called me to help him discover why his tractor wouldn't start
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