EJ20 max hp on stock internals.

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Sep 12, 2005 | 02:59 PM

#16

Double Helix

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From: I-80

Car Info: E39 M5

Quote:

Originally Posted by REXX13

Any one know how much hp the stock ej20 can handle? I got a guy with all your basic bolt on mods turbo, cooler etc.. Says he's pushin 315 whp. I have all the same mods and I'm pushin 267 whp. Which is pretty hard all ready but 315 on an EJ20 with no internal mods. I'm thinkin if it's true his motor will be broke soon @ that power.

Give me some thoughts on this.

Thanks, T.

Hey T just race the guy or compare times. I think people don't know what they are talking about when they shout dyno results. I'm sure he might be making 315 but that could have been from an aggressive tune. My buddy's STI was tuned to make 362whp on 91 but then was brought down to 340 to save the motor. Does that mean he can claim 362? BTW how's that elbow working?

Sep 13, 2005 | 02:16 PM

#17

psoper

250,000-mile Club President

Joined: Nov 2002

Posts: 4,770

From: Bizerkeley

Car Info: MBP 02 WRX wagon

The answer is:

More than the tranny will be comfortable with...

and the stock motor can burn valves without mods, so another answer would be <227

what you get will depend on who does the work and how much money you spend, how reliable it will be is anybodies guess.

Sep 13, 2005 | 02:57 PM

#18

fastnoypi

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Joined: Nov 2002

Posts: 152

are we talking stock ej205 or ej207?

theres a ej207 with a gt35 on the nabisco board doing 500+ whp

Apr 3, 2014 | 01:13 AM

#19

Haleballs1

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Joined: Apr 2014

Posts: 1

From: Texas

Car Info: 03 subaru impreza wrx wagon

I have a issue . I have my wrx in the shop Im putti.g the jdm ej20 non sti motor in it with a cattless downpipe and a tune . A race timing kit a jdm transmission rear end and front end . I dobt have boost gauges everything is stock on the car. I need to know how much whp and regular hp the car should get if they run tge car at 18 psi o. A street tune ?

Apr 3, 2014 | 01:22 AM

#20

reign_

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From: Salinas, CA

Car Info: 2002 WRB Wagon

That 9 year thread bump

Apr 3, 2014 | 05:08 AM

#21

Brfatal

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Joined: Oct 2003

Posts: 2,123

From: Sterling, VA

Car Info: '02 WRX + '15 WRX

And he bumped it with a completely illegitimate question. :-|

Apr 26, 2014 | 11:15 PM

#22

AggPerMS

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Joined: Mar 2014

Posts: 56

From: Santa Clara, CA

Car Info: 02 WRX WRB Wagon + MR2s

I was going to ask the same question ... I might as well add it here even though it's a 9 years old thread!

Any 500 whp ... EJ205 with stock internals! If not, what breaks?

I have a budget of $5000 (

) and my goal is to make 500 whp!

I will tear apart my first EJ205 in two weeks and I will see first hand but I would like some information before hand.

The crank appears to be a very weak point because of the thin counter weights base on the pictures I see.

I've seen a few pictures of crack blocks but how common is that?

May 15, 2014 | 07:47 AM

#23

ride5000

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Joined: Feb 2003

Posts: 488

From: 12.9 / 105+

Car Info: black my03 5mt wrx s/w

around 400wtq the rods have a habit of jumping out of the block.

just like i stated 9 years ago...

May 15, 2014 | 08:06 AM

#24

newyorkreload

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Posts: 6,781

From: 500mi North of Montana. Enjoying free health care.

Car Info: Bugeyed Autowagon

Quote:

Originally Posted by Haleballs1

"Jdm transmission" is this a STi 6 speed or the hard to find flappy paddle 4EAT? What kind of gas are you going to get tuned for? Intake or upgraded inner-cooler? What turbo is on the car?