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Old 01-16-2013, 10:06 AM   #1
Scooby Newbie
Member#: 335815
Join Date: Oct 2012
Chapter/Region: E. Canada
Location: Halifax, NS
2002 Impreza WRX
Midnight Black

Default 2002 wrx stock motor power

Hi, I have been going through posts all morning and cant seem to find anyone that talks about just how much power the stock pistons/rods and 2l motors are capable of before you should start upgrading internals, etc.
I was wondering if someone could point me into the right directions as i know it has to be here somewhere, just cant seem to find it.

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Old 01-16-2013, 10:13 AM   #2
Newbie Moderator
Member#: 91347
Join Date: Jul 2005
Chapter/Region: NESIC
Location: Ord, Nebraska
'13 XV Crosstrek,12
1050 Triumph Speed Triple


Probably somewhere over 9,000 I would say. OVER 9,000!!! THAT CAN'T BE!!!

Every car is different. I've heard people blowing rings and pistons around 300+, while others hit 400+. Go to the Proven Power/Bragging forum and search around. If You're looking to make 300bhp (about ~225-ish awhp) you will probably be fine, depending on the engine you're starting with. If you're looking for a 500bhp monster... you're probably going to need to do internals anyway just to get there.

You could always just install an MBC and tactrix and slowly turn up the boost, see where it breaks, and then just let us know!

Fill out your profile.
Let us know what you're thinking about doing. Budget. Racing/Street.
Or if it's just for knowledge... read through the proven power board.
Loyale93 is offline  
Old 01-16-2013, 10:14 AM   #3
Scooby Specialist
Member#: 228784
Join Date: Nov 2009
Chapter/Region: MWSOC
Location: Chicago, IL
2004 wrx
black, stage 2+


This depends on alot of things. such as the health of the engine (compression/leak down), if all maintenance is kept up with, how good the tune is, what kind of fuel you are using, how you drive, etc. But with a good tune, around 300 seems to be the fuzzy line.

But again, it really depends on a lot. People with stock engines have cracked ringlands, and people with 400hp have been on a stock block for a while.
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Old 01-16-2013, 11:37 AM   #4
👏 Big Ron 👏
Member#: 18062
Join Date: Apr 2002
Chapter/Region: MAIC
Location: I can save you a ton of cash
on car parts so PM
me b4 j00 buy


Here is the answer based on reading 9000 posts over 10 years:

300 WHP is the limit of the 2.0L when driven by a reasonable person.

Many have exploded motors at stock when driven by a maniac.
Many have exceeded 300 when driven by a super reasonable person.

Your mileage may vary, don't run with scissors, void in Canada.
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