There comes a point that with stock gearing, weight, and aerodynamics where the gains stop. At that point you can add all the power you want, but you aren’t gaining any speed. An outdrive Guy was explaining this to me a while back and it’s the closest I can compare to. He put it this way. At a certain point, due to friction against the hull and the stock prop, you can add all the juice you want, but the boat will not run any quicker due to the physics of friction against the hull. And at another point, add too much power and the prop will cavitate effectively losing top end speed. Basically, there comes a point where you can add all the juice in the world, but it won’t make a difference. You can throw a supercharger on the Escalade 6.2L and boost it to infinity if you want, but it will only be marginally quicker than stock, and will still get spanked by a corvette. Physics at a certain point nullify the gains. In the end the vehicle had to overcome the friction of the tire against the road surface and has to “swim” through the air surrounding it to get to speed, and you can only do it so quick even with infinite power. It can only do it as quick as the gears can tranfer the power to the road surface, and as we know too much power and the wheels will break free and stop transferring power to the road, effectively killing the speed. You are limited to how fast your gears and drivetrain can tranfer the power and to the friction the tires have against the road surface, and then how fast the vehicle can travel through the surrounding air. We can’t overcome physics, at a point there is no more gain.