Quote:
Originally Posted by Sponge60
How does GM get away with advertising the HP at 400 for the L99 and 426 for the LS3 when no one has dyno'd that? Did I miss something in the fine print?
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Because despite what Top Gear tried to promote in their dyno test of a GT500, the number that is advertised is not the same as what you will be testing when you strap it down for a dyno run. GM and every single other automaker out there rates their engines with an engine dyno. This is a test rig that measures the output of the engine. A chassis dyno, which is what you most often see, measures the power at the wheels. This is the power at the crank minus any losses from the drivetrain.