[SuperSound]

Originally Posted by whiteboyblues2001

It's totally drag. Just so you know the equation for drag is a function of the velocity squared. So as you go from 40 to 80 miles per hour, your drag doesn't double, it quadruples.

Put your hand out of your car window at 50 MPH. You can see from that, there is a very large force associated with that speed. 150 MPH is three times faster, which would mean nine times more drag at 150 MPH than 50 MPH. That is just about an order of magnitude greater! So if your amount of drag at 50 MPG is 30 lbs. of force, it will be 270 lbs. of force at 150 MPH.

So, yes, aerodynamic drag is the most likely factor here in this test. If it were the engine (OHV vs. DHOC) like you said, that difference would appear at low speeds as well as high speeds (assuming you keep the two cars in meat of their respective power bands). Not JUST at high speeds. And not JUST high speeds that not-coincidentally are the speeds where aero is known to be the defining factor.

Yes, gearing plays a role, but OHV vs. DHOC is not a factor, because it would be a factor at lower speeds as well.

You would think if the aero is the factor, then the Mustang would have better FE than the Camaro, but it doesn't. They are identical on the highway and the Mustang is 1mpg less in town. So it sounds like the Coyote is not as "efficient" whereas the LT1 is. Or like was said earlier, the Camaro going into 5th at 140mph allowed the GT to catch up. I'd like to see the in car footage and exactly what MPH the GT passes.