F150 2.7 EB vs 5L V8 towing mpg

BenK wrote:
How much head room did the thermal dynamics engineers design in ? The 2.7L's has to be MORE than the 5L's system to have the same duty cycle

Wonder what the piston FPM is. The gold standard for longevity is 4,000 FPM (take the piston stroke x RPM /6 is the rule of thumb to figure red line when you know the stroke). A smaller displacement might have to rev higher (even when forced fed) to attain that HP/Torque

There are more and the cam comes to mind. SMOG limits over lap, but lift and duration plays into this, which goes to how those extra forces are managed with the cam followers, rockers, valve springs, etc, etc

I find all the science behind engine design very interesting, if a little over my head. But as far as the smaller engine having to rev higher to make the same power, not the case in this instance. The 2.7's max torque is 400 lb/ft at 2750 rpm, whereas the 5.0's max torque is 380 at 4250. So the 2.7 is producing more horsepower at 2750 rpm. Previous tow tests I've seen (the travel trailer "drag racing") where the 2.7 was significantly faster 0-60 towing the same weight trailer as the 5.0. This indicates it puts more horsepower to the ground, at least during towing acceleration.