EJ22 build - Subaru WRX Forum
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post #1 of 13 Old 03-12-2014, 01:10 PM Thread Starter
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Talking EJ22 build

hey guys i have an 03 WRX, recently melted a piston and replaced entire block with an ej22t. i wanna do some minor mods, already have 3in exhaust and intake, i would like a better manifold some bigger injectors and larger top mount. anybody have any feedback? where could i find a cheap STI top mount? and some 550s?
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post #2 of 13 Old 03-13-2014, 02:33 PM
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hopefully you're keeping the EJ205's top half?

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post #3 of 13 Old 03-14-2014, 09:16 AM Thread Starter
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yes i am
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post #4 of 13 Old 03-14-2014, 11:22 AM
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Well if you got an EJ205 top end you shouldn't have to worry about much to make it work. If you want to upgrade the exhaust manifold I'd send your pipes out to grimmspeed while you got it ripped up and have them do a P&P on it. It's a pretty good setup for a lot more power than stock if you do that. Injectors I wouldn't bother trying to find the old JDM STi ones (pinks) and instead just modify the ones from the EJ205. Should get at least 700 out of em safely. Need a fuel pump if you want to use that btw but that's no big deal. Top mount you can get used 04-07 STi ones from nasioc but they tend to be overpriced and they're not that big (although more efficient than the stock WRX one). If you're getting a bigger turbo down the road, and why not with that closed deck bottom end, you might consider a larger aftermarket top mount.

I don't know what crank and piston combinations you can get away with connecting up the EJ22t and the EJ205, hopefully you figured all that out. It's not the most common of pairings. Maybe one of our engine gurus can chime in on what guts you need to pair them.

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post #5 of 13 Old 03-14-2014, 12:36 PM Thread Starter
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thank you for the feedback, i am looking to upgrade my turbo also maybe vf42 but im still unsure. i would like to be close to 400whp.
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post #6 of 13 Old 03-14-2014, 04:33 PM
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400WHP ain't gunna come out of a VF42. I doubt 300whp would. And you're not going to want a stock STi TMIC for those power levels either.

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post #7 of 13 Old 03-17-2014, 01:23 PM Thread Starter
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what setup would you recommend to run if i was just looking to hit around 300whp with a stock TD04 and stock internals?
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post #8 of 13 Old 03-17-2014, 04:51 PM
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Justin,

I'd recommend reviewing your rebuild goals with a builder, as part of your planning. You'll save a lot of headaches with some simple up-front planning.

You'll need a larger turbo to attain 300 whp, stronger internals, upgraded fuel system, etc. and a builder or a performance shop can help you select items that are compatible and consistent with your target power goals and budget.

In general the more power you want the bigger the budget you'll need, something like:

1. OEM rebuild - 4 $k,
2. 300 whp - 6 $k, and
3. 400 whp - 10 $k.

I'm guessing with these approx. costs so don't hold me to them, but I'm planning an OEM rebuild as a result of this cost-escalation reality.

It's fun and exciting at the same time, but I only have a budget to do it right the first time.

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post #9 of 13 Old 03-17-2014, 10:20 PM
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Quote:
Originally Posted by justin93m View Post
what setup would you recommend to run if i was just looking to hit around 300whp with a stock TD04 and stock internals?
That's not going to happen either. Your power goals are unrealistic for what you intend to accomplish them with. You don't seem to have a real goal set. You need to do that before you spend a dime modding the car. What's done to it now?

Larger injectors, fuel pump, and a retune are mandatory now that you have a larger engine. You don't have a choice on whether to get them or not.
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post #10 of 13 Old 03-18-2014, 08:36 AM Thread Starter
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it just has the EJ22t, intake, up pipe, 3in exhaust with indivia downpipe, just modified stock injectors
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post #11 of 13 Old 03-18-2014, 08:53 AM
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Justin,

The 2.0L's fuel system won't likely keep up to the 2.2L motor. Modified injectors would work, if the pump can keep up. I'm told it's marginal on 10+ year old gear.

I was looking into building a 2.2L stroker with an STi crank and rods, and that's the same guidance I got. Upgrade the injectors and fuel pump.

Although I could get an STi crank and rods for $350 and DW injectors and pump are $650, it's becomes an additional $1,000 on a build for this stroker engine. Plus a custom tune would be required for it, as the COBB AP off the shelf maps aren't suitable.

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Last edited by LW_Black4; 03-18-2014 at 09:07 AM. Reason: stroker
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post #12 of 13 Old 03-18-2014, 09:21 AM Thread Starter
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thank you, i will invest in a better fuel system, and take it to a performance shop to help guide me with the build. i will also keep you guys posted on the status of the build. thanks again for all the feedback so that i dont blow this car up.. this is a great forum and i will be a regular on here
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post #13 of 13 Old 03-18-2014, 09:44 AM
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if you have an EJ22t block, use it. They're the best EJ bottom end ever made. It's certainly not the cheapest bottom end option though.
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