Originally Posted by Redglare

Engines in north america are rated under ,SATP - Standard Ambient Temperature and Pressure is a reference with temperature of 25 degC (298.15 K) and pressure of 101 kPa.
or in normal units; 77 degF @ 1 atm = 1.01 bar.

so the Z produced 332hp at those conditions, you start raising temperature and or pressure and your horsepower suffers.

so to the people who bought the Z in colorado the actual horsepower is closer to 300 crank, those in Arizona during summer 100+ F weather are also not getting the 332hp.

so ideally, if you drive your car in Florida during the winter you will be right at sea level 29.96mm Hg ~ 1atm, and the temperature will be right around 77 depending on exact location, now drive the same car in Florida during the summer and you will also be less then advertised.