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Old 11-20-2012, 10:52 AM
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ShakeDaddy ShakeDaddy is offline
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Location: Scottsdale, Arizona
 
Join Date: Jun 2012
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Mein Auto: 2013 650i Coupe
Quote:
Originally Posted by Bönz View Post
Notice also that Dinan's torque increase is about 22% (450 to 550) and there's no peak torque difference between stage 2 and stage 3. Engines produce torque - HP is calculated as a function of torque and RPM. Clearly the exhaust change effects the torque curve, peak output, which makes sense on a turbochaged engine. This also explains the higher increase in peak HP (versus torque) as it all has to do with the torque curve.
Great infomation. Bonz I believe Dinan's quoting a 580 TQ @ 3500rpm for the Stage 2 that calculates to a 29% (450 to 580) increase.
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2013 650i Coupe
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