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2020+ Shelby GT500 Mustang
It's Official! 2020 GT500 Makes 760HP
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<blockquote data-quote="Voltwings" data-source="post: 16267513" data-attributes="member: 155561"><p>What you guys aren't taking into account is the ambiguity of factory ratings. I've seen a handful of Quattro Audi cars dyno within 20 horsepower at the wheels of their crank rating. So, do we get all technical and try to explain it, or is the easier answer that the factory under rates them?</p><p></p><p>Get a data log on the dyno and calculate your brake specific fuel consumption and compare that to the reading at the MAF, and compare that calculated crank figure to whatever you make at the wheels. Airflow and fuel being used is a set in stone calculation for horsepower, everything else is pretty arbitrary.</p><p></p><p>Even then, you're not accounting for variance from dyno to dyno. I had my car on 2 different dynos an hour apart and there was a 50 WHP and 75 WTQ discrepancy between the both of them. Did I magically lose a larger percentage on the first dyno?</p></blockquote><p></p>
[QUOTE="Voltwings, post: 16267513, member: 155561"] What you guys aren't taking into account is the ambiguity of factory ratings. I've seen a handful of Quattro Audi cars dyno within 20 horsepower at the wheels of their crank rating. So, do we get all technical and try to explain it, or is the easier answer that the factory under rates them? Get a data log on the dyno and calculate your brake specific fuel consumption and compare that to the reading at the MAF, and compare that calculated crank figure to whatever you make at the wheels. Airflow and fuel being used is a set in stone calculation for horsepower, everything else is pretty arbitrary. Even then, you're not accounting for variance from dyno to dyno. I had my car on 2 different dynos an hour apart and there was a 50 WHP and 75 WTQ discrepancy between the both of them. Did I magically lose a larger percentage on the first dyno? [/QUOTE]
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2020+ Shelby GT500 Mustang
It's Official! 2020 GT500 Makes 760HP
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