SL-Class (R230) 2003 -- 2012: Discussion on the SL500, SL550, SL600

SL/R230: Hp

Old Jul 19, 2005 | 11:08 PM
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StephenK's Avatar
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From: Tallahassee, Florida
2006 SL600, 2001 S500, 1996 SL320
Hp

Has anyone had their cars tested to see actual HP, if so how did it compare to advertised HP.
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Old Jul 19, 2005 | 11:51 PM
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On the dyno you should see around 435rwhp.

I'm assuming the engine makes 510 at the crank and a 15% drivelosee.
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Old Jul 20, 2005 | 08:16 AM
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From: Boston
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Originally Posted by StephenK
Has anyone had their cars tested to see actual HP, if so how did it compare to advertised HP.
While you can find plenty of dyno results on this board (including the ones from Renntech you posted) the trick is that you are forced to make assumptions about driveline losses. I haven’t heard of anyone pulling an engine to measure on an engine (rather than chassis) dynamometer. My personal view is that the percentage driveline loss for such high-horsepower engines is a little lower than people think, meaning that people slightly overestimate crankshaft HP from their dyno runs.
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