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Old 07-20-2005, 10:43 AM   #1
kaisersouse
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Default Theoreticals...max performance from EJ22 NA

Was wondering if anyone has info or experience with the max amount of hp/torque you can get out of the EJ22...WITHOUT adding aftermarket boost.

I can assume the work to acheive this wouldnt be worth it, but im kinda looking to start a project/experiment

So pretned you only had an ej22 to do this with. not boost, no engine swaps...what would be the basic needs to achieve at LEAST 250hp/t?
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Old 07-20-2005, 11:07 AM   #2
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250 whp or chp? Big difference between the 2. If you want the max power out of any N/A EJ you need cams, heads, intake, full exhaust and possibly some tuning to get the most power.
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Old 07-20-2005, 11:12 AM   #3
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Well,
regardless of which year, it is really very unlikely you will ever hit 250hp on an Ej22 NA. That's like 110hp/l. Even if you port the heads, they will just never flow enough air to support that sort of power. That doesn't even take into consideration the intake manifold. If you were to build the bottom end, and do the heads, and rev it to 7500-8000 rpm, I think the limit is around 220hp. You are going to need compression in the 12's to pull it off. And bigger injectors, and of course genuine engine management.

If you are serious about this project, get some Ej25 heads. I have toyed with this idea. Using the Ej25 heads (which yield 8.6:1 CR) and some custom pistons to raise the CR up to 12, more than 220 hp may be possible if you are revving to 8000 rpm...
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Old 07-20-2005, 11:13 AM   #4
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WARNING: IM A HORRIBLE HORRIBLE NOOB WHEN IT COMES TO CARS. I'm just getting into car stuff..;.my primary forte is computers. Youve been warned.

Whats chp (commence laughing)?
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Old 07-20-2005, 11:18 AM   #5
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Quote:
Originally Posted by Matt Monson
Well,
regardless of which year, it is really very unlikely you will ever hit 250hp on an Ej22 NA. That's like 110hp/l. Even if you port the heads, they will just never flow enough air to support that sort of power. That doesn't even take into consideration the intake manifold. If you were to build the bottom end, and do the heads, and rev it to 7500-8000 rpm, I think the limit is around 220hp. You are going to need compression in the 12's to pull it off. And bigger injectors, and of course genuine engine management.

If you are serious about this project, get some Ej25 heads. I have toyed with this idea. Using the Ej25 heads (which yield 8.6:1 CR) and some custom pistons to raise the CR up to 12, more than 220 hp may be possible if you are revving to 8000 rpm...
honestly 220 would prob be just fine by me
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Old 07-20-2005, 02:53 PM   #6
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chp= crank horse power

Matt is saying 220hp is the max you could get out of it. Could you do this? yes? Is it worth it? NO. An N/A build up on an EJ22 would cost you loads of $$$, way more than swapping the engine for an EJ20 or EJ257.

If you want more power, about 35 more hp, swap out the engine for an EJ25 out of an RS, legacy or OBS. Most EJ25 long blocks can be had for ~$500.
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Old 07-20-2005, 03:58 PM   #7
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Quote:
Originally Posted by Nicklbrso
chp= crank horse power

Matt is saying 220hp is the max you could get out of it. Could you do this? yes? Is it worth it? NO. An N/A build up on an EJ22 would cost you loads of $$$, way more than swapping the engine for an EJ20 or EJ257.

If you want more power, about 35 more hp, swap out the engine for an EJ25 out of an RS, legacy or OBS. Most EJ25 long blocks can be had for ~$500.
really? And thats what i want..longblock vs shortblock? whats the difference anyways?

yah i guess that sounds cheaper than doing all the engine upgrades. Out of morbid curiosity...why would i want to consider a 2.0 when i already have a 2.2?

thanks again. sorry im such a noob everyone. i really appreciate this.
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Old 07-20-2005, 06:08 PM   #8
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Longblock = whole engine, shortblock = everything but the heads im pretty sure. and Intake manifold?
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Old 07-20-2005, 06:27 PM   #9
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If you want to move this from theoretical to practical, give me a budget to work with...
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Old 07-21-2005, 12:26 AM   #10
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I run even and a little tiny faster than a stock 2.5RS with '93 intake pipe between MAF and TB, custom 2" header, and 2.5" catback w/ 2.25" glasspack in my '99 Impreza L wagon 5spd. I also have the 2.5RS tranny and rear diff in there too from a '00.
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Old 07-21-2005, 01:59 AM   #11
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Quote:
Originally Posted by kaisersouse
So pretned you only had an ej22 to do this with. not boost, no engine swaps...what would be the basic needs to achieve at LEAST 250hp/t?
Have $20,000 sitting around? Then you can try.



However, in all seriousness, without doing anything major to the internals or the design of the motor you wont get more than 20-30hp more out of it.
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Old 07-21-2005, 11:20 AM   #12
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Quote:
Originally Posted by kaisersouse
really? And thats what i want..longblock vs shortblock? whats the difference anyways?

yah i guess that sounds cheaper than doing all the engine upgrades. Out of morbid curiosity...why would i want to consider a 2.0 when i already have a 2.2?

thanks again. sorry im such a noob everyone. i really appreciate this.
EJ20= 2.0 liter turbo out of a WRX, not a N/A engine.

A longblock is basically a complete engine(water pump, intake manifold, heads etc etc) where as a shortblock is just the block itself with no accessories.
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Old 07-21-2005, 11:30 AM   #13
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Quote:
Originally Posted by Nicklbrso
EJ20= 2.0 liter turbo out of a WRX, not a N/A engine.

A longblock is basically a complete engine(water pump, intake manifold, heads etc etc) where as a shortblock is just the block itself with no accessories.
would my stock tranny handle a WRX swap? I am very interested in that now.

PS i have no budget. As in...right now i have no money. I need to know what im up against before i start financial planning. Right now i want to keep this all theory.

for now
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Old 07-21-2005, 01:33 PM   #14
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Quote:
Originally Posted by kaisersouse
would my stock tranny handle a WRX swap? I am very interested in that now.

PS i have no budget. As in...right now i have no money. I need to know what im up against before i start financial planning. Right now i want to keep this all theory.

for now
Most likely not. A stock tranny from an L can not handle the torque the WRX makes. You're more than likely to blow the tranny unless you're really easy on it.
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Old 07-21-2005, 01:53 PM   #15
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is there a difference between L auto's and OBS auto trannys?

so if i did wrx motor swap i would have to FIND an auto trans from a WRX or can i modify the existing one with better internals?
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Old 07-21-2005, 09:04 PM   #16
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You have an Auto? I dont think the auto would have trouble with the WRX motor. And there are a few folks who use RS or L trannys for WRX swaps and just run with them til they pop.
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Old 07-22-2005, 06:46 AM   #17
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Quote:
Originally Posted by Kostamojen
You have an Auto? I dont think the auto would have trouble with the WRX motor. And there are a few folks who use RS or L trannys for WRX swaps and just run with them til they pop.
ah ok i thought i had heard that the autos could take more of a beating, but i wasnt sure. If i went so far as to do the swap, i would still look at tinkering with the tranny just for my own piece of mind.

thanks so much for all the very thoughtful advice everyone
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