Quote:
Originally Posted by The Radium King
um ... i said 100 hp/litre. ie, divide horsepower by engine displacement. pretty standard way to state the efficacy of your engine. your 318 hp / 3.2 litres is 100 horsepower per litre. porsche could barely get that with race engines of the 996 era, and pretty much couldn't with the m96. 55 hp out of the 3.2 puts you at 307 hp; the 3.4L 996 only made 304 hp, so i doubt you'll be able to get there with .2 less litres.
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How can a chassis dyno machine know the drive train loss on a car? I started a thread to find the drive train loss through a Tiptronic trans Boxster.
http://986forum.com/forums/performance-technical-chat/56594-curious-about-hp-loss-through-drivetrain.html
Only person to give out any real numbers was Jake Raby, but it was for manual cars.
Quote:
Originally Posted by Jake Raby
I have two engine dynes and a chassis dyno all within 50' of each other. We can pull an developmental engine off the engine dyno and install it into the car the same day, then test it on the chassis dyno. I see 18-22% losses generally from a manual car.
Pay zero attention to the factory power rating, often times they are posted in DIN and not SAE anyway.
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So if Jake Raby is seeing a 4% swing on manuals, how is a chassis dyno machine going to know how to accurately calculate drive train loss?
Can you answer that for me? What's the drive train loss on a Tip trans car?