dickandlois Report post Posted August 22, 2018 Looking through some of my files and found this information that might be helpful to those trying to understand where Torque to Horsepower points are in relationship to RPM's and where these engine maximum performance point is. Chevy 8.1 Just as with horsepower, the 8100 Vortec torque varied -- in small increments -- between 2002 and 2006. In 2002 and 2003, the 8.1-liter produced 455 foot-pounds of torque at 3,200 rpm. From 2004 through 2006, the engine's torque varied from 440 pound-feet at 4,200 rpm to 450 foot-pounds at 3,200 rpm. The Max RPM is 5600, the power go’s flat at around 5200 RPM The Engine torque varies from 2002 to 2012 depending on how the engine was setup to meet EPA standards in most cases. Read More at http://www.ehow.com/list_7430500_specifications-8_1l-engine.html Ford Trident V-10 Torque is 457ft.lbs. @ 3250RPM and 362 horsepower @ 4750 RPM This means that above 3250 RPM the torque decreases as HP increases till 4750 RPM Rich. Share this post Link to post Share on other sites
