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Old Mar 3, 2003 | 07:56 PM
  #5  
josh's Avatar
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From: Moraga, CA
Car Info: 2016 CWP WRX
hey

the STi engine is far from the same as the US wrx motor. bigger ic, bigger turbo, bigger injectors, lighter stronger pistons and valves, and a whole slew of other parts. the block might be one of the only similarities.

the STi engine is made for higher horsepower. when car man. make an engine, they build it to withstan higher hp ratings than what the motor is going to be sold at. this insures a small amount of reliability, especially in the US where people beat the hell outta their cars. not to mention they know fully well that people are going to mod the crap out of the motor, especially cars like the wrx, honda si's, etc. with that in mind, the US rex is slated at 227 hp, but seems to easily handle up to 300 crank hp without too much reliability. the STi motor is said to have 280(proly higher really) and could probably handle the same increase the US rex motor can (in terms of percentages, not just in size).

now the "new" 2.5 is a totally different beast. it is starting even higher than the *** spec 2.0 hp and torque wise, but it will be a while before we all know what the limits of that motor will be. it will obviously be more than a 2.5 from a 2.5 rs with a turbo slapped on it. only time will tell...


anyway, sorry for the ramblings, but just wanted to make a few things clear...

josh

josh
Old Mar 3, 2003 | 08:07 PM
  #7  
josh's Avatar
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Car Info: 2016 CWP WRX
300 hp. they use a restrictor to make sure.

torque is wide open though.

josh
 
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