As you probably already know, a 4.0 HO was rated 190 hp, the 3.7 was rated at 210 hp. (flywheels)
According to K&N, the 4.0 was capable of 163 rear wheel horsepower.
Again, according to K&N, the 3.7 was capable of 167 rear wheel horsepower.
The calculated driveline losses are at 14.2% for...