How fast is a stock Z really?

[Thefunk]

I've seen varying WHP readings for the stock Z. I've seen 325whp to 370whp.

 

[ZMidlife]

Could be corrected vs uncorrected #s

 

[thesilverbullet]

I've seen varying WHP readings for the stock Z. I've seen 325whp to 370whp.

A lot of variables with dynos. Hub dynos like Dynapack will be real close to flywheel hp. A hydraulic drum dyno like dynojet and mustang will read much lower than a hub dyno. A mustang will typically read lower than a dynojet. boosted engines can vary more than n/a due to heat soak and variation in the boost control. Auto’s read lower than m/t. Like zmidlife said, the dyno software has different options to compensate for test conditions like temp, altitude, humidity, etc. so only real answer is calculating gains / losses with same dyno and conditions.