Hey Guys,
Vehicle 1: Alpine white E90 M3, 6 Speed, stock cats, Supersprint Exhaust and the Active Autowerke Level 2 625 Supercharger System.
Vehicle 2: Alpine white E92 M3, 6 speed, Active Autowerke X-Pipe, Active Autowerke Exhaust and the Active Autowerke Level 2 625 Supercharger System.
Both vehicle were taken to a Dyno Jet and to the Active Autowerke Mustang Dyno on Friday May 20th, 2011. All testing completed between 9am and 4pm.
You'll notice Vehicle 2 will show a ~15% drive train loss on a Dyno Jet and a ~23% drive train loss on our Mustang although all testing was completed on the same day and conditions.
A Dyno Jet is an inertia dyno which calculates horsepower based on how fast the drum (set weight) is spun and then it calculates horsepower. Dyno Jets also 'assume 85% mechanical efficiency' which means it factors in a 15% drive train loss in it's formula.
Our Mustang is a load based dyno and calculates the horsepower differently based on vehicle's weight, temp, etc... Generally Mustang's tend to read lower. Scroll down for charts and vid's.
Based on the charts below you'll also notice Vehicle 1 shows on ~15-20 less horsepower while the only difference between the cars is the exhaust system.
This is why...
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Vehicle 1:
-Mustang Dyno:
-Dyno Jet:
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Vehicle 2:
-Mustang Dyno:
-Dyno Jet:
