Where's the torque….

Today’s engines are designed to deliver maximum torque at low RPM. This provides for good fuel economy with proper gearing

Torque curves have been designed to keep the maximum torque available, as long as you drive within the RPM range that satisfies the EPA21 guidelines. Its all good, but what does that mean to the old-school driver.

Engines prior to 2014 were driven at RPMs in the 1700-1900 range. This is far beyond the fuel economy recommendation, and in fact decreases available torque. Take for example the comparison of 605 horsepower engines above with two different torque ratings. The engine on the left produces 1850 ft. lbs. of torque while the one on the right delivers 2050 ft. lbs. of torque.

2050 Torque is available up to 1700 rpm. After 1700 rpm the engines perform pretty much identical. If your customer is thinking they want to drive in the 1700-1900 RPM range, they could be displeased with the higher torque engine due to perceived lack of power. The power is there, it’s just at the lower RPM.

Be sure to have this conversation when you specify a 2050 ft. lb. engine for your customer. A conversation up front is much easier to manager than an upset customer, especially if you cannot explain the phenomenon. EPA21 engines do a fantastic job, but some customers may have to change their driving habits to get the most out of the technology.