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thinking from an rx-8

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Old Oct 8, 2003 | 11:22 PM
  #38  
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From: Rockland County...NY
Car Info: want a WRX
a heated discussion? haha
the STi will win in the quarter mile.
The Evo will win in the twisties. BTW thats stock vs stock. The STi is faster in a line and the EVO handles slightly better. Period. End of discussion.
Old Oct 8, 2003 | 11:25 PM
  #39  
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From: Rockland County...NY
Car Info: want a WRX
Re: Your hearts in the right place at least.

Originally posted by Snowy
I think your getting a little confused about "Crank" hp and "Wheel" hp. The car manufactures, and this holds true for almost all, measure the horspower of their engine at the crank. They also don't have the alternater, power steering, or A/C connected to the engine, this means that when it is actualy put into a car those suck up a lot of power, and then even more power is lost to the transmision (having to overcome the friction involved) so when you compare the claimed Hp to the wheel Hp you have to take all that into account. Also you have to understand what conditions the car is being dyno'd in, what is the ambient pressure, whats the ambient temp, how long has the engine been running, is the intercooler and or radiator hot or cold, what fuel is it running on. All that and a **** load more will all effect the measured wheel Hp. The only time I've heard of an engine making more than the claimed Hp was on the Dodge Neon SRT-4, Dodge got the claimed Hp delibritly when the engine was running it's worst, ie. hot intercooler, hot engine, yada yada. Now personaly I have to give props to Dodge for that, if more manufacturers put the claimed horse power at what the car would do in the worst condition I would be one happy puppy.
As for the STi, the engine really does have that Hp when tested as the manufactures do it. real world though, it varies on what type of dyno you like, some say 270 @ wheels, some say 220, either way though the All wheel drive and limited slips suck up a lot of power, thats why people get underdriven pullies and sliprier transmision fluid and engine oil.
If this is all true then why do nissans cars engines make different horsepower when they all have the vq35det?
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