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Old 10-12-2019, 12:01 AM   #1
Maverick_121
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Default JDM EJ20 2.0 Liter Engine Capabilities and Potential

I recently bought a 04 FXT with a JDM EJ20 2.0L Engine swap. Some of my reaserch suggests that this engine can handle a good amount of power and boost.
I am ready to put on a bigger turbo (TD05 18g) with all supporting mods. I was speaking with a tuner who was recommended to me for being good with JDM builds. He says these engine blow around the 300 HP mark. My Initial belief was that it could handle more than that. But theres not much on the internet to suggest what is can reliably handle. My personal goals are about 350 HP daily driver.
Does anyone have any insight to how much power and boost this engine safely can take for a daily driver?
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Old 10-12-2019, 12:19 AM   #2
Unabomber
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You will NOT see that power in an OEM daily driver. Plus, you don't know what 2L you have as there are many JDM ones. If you want 350, that's a much bigger turbo and a built motor and Christian driving to go along with it.
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Old 10-12-2019, 12:35 AM   #3
Maverick_121
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Originally Posted by Unabomber View Post
You will NOT see that power in an OEM daily driver. Plus, you don't know what 2L you have as there are many JDM ones. If you want 350, that's a much bigger turbo and a built motor and Christian driving to go along with it.
Is there a way to tell exactly which EJ20 I have? I pulled the engine and replaced the clutch the other day. I took a bunch of pictures and videos of the whole engine.
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Old 10-12-2019, 11:50 AM   #4
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Quote:
Originally Posted by Maverick_121 View Post
Is there a way to tell exactly which EJ20 I have? I pulled the engine and replaced the clutch the other day. I took a bunch of pictures and videos of the whole engine.


Does it have AVCS? That won't tell you specifically which one it is but it will narrow down the years it came from.
As for power potential, that's the most subjective thing you could possibly ask. The way you drive and the quality of your tuner will play the biggest role. Someone who drives conservative can make almost anything last even if the tune is crap. Mostly because they don't push the car. If you drive like an a** then you'll probably break the trans before the engine. But a bad tune plus driving aggressively can destroy the engine quickly.

The turbo is one part of the power equation. It's about how all the mods work together. Ask Ron from the post above. He has one of the highest powered 16g sized turbos out there. But he and his tuner made sure everything works together as perfectly as possible.

Can you push more than 300 to the wheels on an OE block and heads? Yes. And you can do it reliably if you do it right. Rods and oiling are going to be your biggest hurdles in terms of reliability on the 2.0. Lack of flow in the heads are going to be a limiting factor in making hp easily. Though AVCS can help a bit through timing adjustability which also helps with spooling the turbo faster. If you still have the 4.44 trans from the Forester then that will help with driveline shock and handle more torque. How much more....... who knows. That depends on you the driver. Some people break the trans on stock power. Some it's fine at 400wtq.

A lot of tuners hate the 2.0. A lot of enthusiasts hate the 2.0. I personally like it. My injectors are nearly maxed out right now otherwise we could push it past 300. I personally don't need much more as this is a good number for daily driving and track days. Paired with a 4.44 trans and I can keep up with my friend who has a 20g xtr on his STi. I take him to 60. He takes me to 100 but not by much. But we both prefer turns and have equal ability there and can't shake each other in the canyons around here.
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