View Single Post
      06-17-2009, 03:46 PM   #122
gr8000
Major
gr8000's Avatar
Greece
72
Rep
1,172
Posts

Drives: E92 M3 - DCT
Join Date: Jul 2008
Location: Athens, Greece

iTrader: (0)

Quote:
Originally Posted by Georgeair View Post
LeMans - technically, you're quoting a weight to power ratio while calling it power to weight. Thus the confusion as up/down good/bad.
+1

P/W = "power to weight": as power goes up (keeping weight constant) = good

W/P = "weight to power" = the inverse of P/W: as power goes up (keeping weight constant) = bad

Quote:
Originally Posted by Lemans_Blue_M View Post
Power-to-weight in the fact that less pounds for every 1BHP the engine produces. (I.E. pounds per horsepower)

Unless you are saying that a lower number is going up, which is very weird...

So a 14:1 power-to-weight ratio for a typical family sedan, means it has to tote around 14lbs. of weight for every 1BHP the engine produces.

And by contrast, a 6:1 power-to-weight ratio for a Ferrari F430, means it only has to tote around 6 lbs. of weight for every 1BHP the engine produces.

You always want that number to go down. Down is good, up is bad.

A lower power-to-weight ratio improves bottom line performance and fuel economy.
What you are saying here is essentially W/P
Appreciate 0