[67mustang302]

Weather plays a big role on a lot of newer cars. The higher compression they run to get the mileage and emissions at part throttle, can result in the computer pulling timing when the temps warm up outside to help resist detonation, and depending on the engine setup, some can be quite sensitive to timing changes. The SRT8 is rated at 425hp, but the weather around here effects them enough that at the track I doubt they're putting out much more than 350-375hp.

With the same given test conditions(sea level, mean temp of 20* C etc), 2 engines might make different power, but as the weather changes the more powerful engine might react more negatively. It all depends on how they're set up and tuned. Based on what I've seen at the track around here, is that the 3V doesn't respond as negatively to adverse weather as the SRT8 does.