Ever wonder why engine builders "cheat" the power stroke on purpose?
Here's what's happening:
when your injectors fire and the piston's driving down,
that's pure power going into the crank.
But builders open the exhaust valve BEFORE the piston hits bottom,
bleeding off pressure early.
Sounds like you're losing power, right? Wrong.
Any pressure released before the piston starts back up is free horsepower.
Wait too long, and that same pressure fights the piston on the way back up,
stealing power and killing your fuel economy.
The higher the RPM, the earlier that valve has to open.
Less time to flow means the timing window gets tighter and tighter.
This is the second most important event in your engine's combustion cycle.
Did you know it existed?