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Old 04-17-2012, 08:18 PM   #1
shade1569
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Default ej253 turbo

so my friend decided to turbo his ej253. i tried talking him into getting a wrecked wrx but he wasnt buyin it. i just wanted to ask a few ?s to someone who has already done this. im curious as to running the oil return line. his is a 2007 and is pretty much impossible to remove his oil pan without pulling the engine. so is there another spot to run a return. a waffle maybe. . . ?? any feedback will help. thanks guys
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Old 04-17-2012, 08:31 PM   #2
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Tell him to do it. Then laugh when his engine blows.
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Old 04-17-2012, 08:36 PM   #3
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plumb it into the valve cover.drill and tap install a barb and connect hose to oil return
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Old 04-18-2012, 10:35 AM   #4
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Quote:
Originally Posted by xilles View Post
plumb it into the valve cover.drill and tap install a barb and connect hose to oil return
This is a good option.
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Old 04-18-2012, 10:39 AM   #5
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Quote:
Originally Posted by shade1569 View Post
so my friend decided to turbo his ej253. i tried talking him into getting a wrecked wrx but he wasnt buyin it. i just wanted to ask a few ?s to someone who has already done this. im curious as to running the oil return line. his is a 2007 and is pretty much impossible to remove his oil pan without pulling the engine. so is there another spot to run a return. a waffle maybe. . . ?? any feedback will help. thanks guys
Ask/your friend if he/she understands that the min_boost the WRX turbo puts out is far too much for a stock EJ253.

After that tell them to buy the AVO turbo kit.
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Old 04-18-2012, 11:37 AM   #6
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Quote:
Originally Posted by GEE-OTTO View Post
Ask/your friend if he/she understands that the min_boost the WRX turbo puts out is far too much for a stock EJ253
dead on! i had the ej253 in my 03 LGT and could get everything to bolt a turbo on it for nothing and i said no. you would need to seriously build up the internals and have some major work done. not worth it
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Old 04-19-2012, 07:06 AM   #7
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dead on! i had the ej253 in my 03 LGT and could get everything to bolt a turbo on it for nothing and i said no. you would need to seriously build up the internals and have some major work done. not worth it
Please write your opinion about the reliability of the turbo (0,3-0,4 Bar) engine (eg253) without changing the internals. ABO very optimistic talk, a very large increase in power without changing the internals.


AVO:
Our new turbocharger kit for the 2005-2009 Legacy and Outback 2.5i, and 2008+ Impreza 2.5i! These kits transform your 2.5i into an absolute beast with double the horsepower from stock! AVO was the first to develop a turbocharger kit for the 1999-2004 Impreza 2.5RS in 2001 - and people are still running around in the original kits! We've drawn on our decade of experience with turbocharging naturally aspirated Subaru motors to create this highly engineered kit.
While our initial kits for the early model RS were based around a top mount intercooler, we have moved to a front mount intercooler for the newer vehicles. A FMIC based design means that users don't have to find a new hood for their that had a hoodscoop, saving a bunch of money right there. Plus the FMIC allows for more flow and better cooling.
We've also designed a turbocharger specifically for this appliction, that spools up quickly, has fantastic mid-range torque, and has more than enough headroom for your needs! This is due to our own cast exhaust housing design which was created specifically for this application. Along with the stainless steel uppipe and downpipe, the kit contains all the necessary hoses, oil lines, water lines, and other fittings necessary to bolt this kit up. The turbocharger is both oil and water-cooled, just like in stock turbocharged vehicles - and just as reliable.
What kind of power can you expect? Take a look at the graph below! Over 200whp on a dyno where stock N/A cars barely break 100whp. And it's easy power too, generated at just 4.5-5psi. This is thanks to our specially designed boost actuators that will run at these lower boost levels, keeping your system from overboosting. Our experience with these kits has shown us all the issues that need to be addressed for running a turbo reliably, and we have taken care of them all.

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Old 04-19-2012, 10:26 AM   #8
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Quote:
Please write your opinion about the reliability of the turbo (0,3-0,4 Bar) engine (eg253) without changing the internals. ABO very optimistic talk, a very large increase in power without changing the internals.
The reason the AVO EJ253 turbo kits works so well is the turbo is custom made to work with a STOCK EJ253. The reason J.Gibbs didn't use the turbo parts he alluded to is b/c they were made for a stock TURBO Subaru. The parts would fit and plumbing things up wouldn't have taken too much extra effort but once it all was in place it wouldnt last very long.
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Old 04-19-2012, 10:34 AM   #9
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Quote:
Originally Posted by GEE-OTTO

The reason the AVO EJ253 turbo kits works so well is the turbo is custom made to work with a STOCK EJ253. The reason J.Gibbs didn't use the turbo parts he alluded to is b/c they were made for a stock TURBO Subaru. The parts would fit and plumbing things up wouldn't have taken too much extra effort but once it all was in place it wouldnt last very long.
Thank you. Exactly what I meant. It CAN be done right. But using stock Subaru Turbo parts isn't the right way to do it if you want a reliable build
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Old 04-19-2012, 03:13 PM   #10
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ewll like i said its not my car and he does want he wants. im just tryin to find out how to make it work. i guess heads will have to work. thanks
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Old 04-20-2012, 07:32 PM   #11
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The high compression of the EJ253 is not friendly to boost. Boost+compression=grenade. Tell your friend he has four choices:

1) Waste a lot of time and money making a stock Subaru turbo work with the plumbing on the EJ253 block and then blow it up pretty soon because wastegate pressure on the turbo is high enough to blow the engine up.

2) Spend a lot more money (but less time) buying an off-the-shelf turbo kit that runs low enough boost to not grenade the engine. The sad thing is that low boost means low power, so you're spending a lot of money and not going very fast.

3) Spend a lot more money and a lot more time to rebuild his engine with the pistons from a turbo, which require the rods from a turbo, and then spend yet more time and money making a stock Subaru turbo work. Upside to this is that you'll have the ability to turn up the boost enough to make it fun. Downside is the huge cost and massive labor

4) Just buy the damned WRX engine and swap it. Cheap, quick, reliable, and can be ramped up to really big power.
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Old 04-21-2012, 03:55 AM   #12
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Quote:
Originally Posted by GEE-OTTO View Post
The reason the AVO EJ253 turbo kits works so well is the turbo is custom made to work with a STOCK EJ253.
I'm serious in the future the turbo 253 engine. And I intend to do it competently. Ready turbo kit is expensive and I think there is nothing supernatural. The same can be done independently. The main thing to strictly control the boost and fuel mixture. I understand that, ideally, a little lower compression ratio, but do not want to disassemble the new engine - I prefer the first stage to do a little boost (0.3 bar).
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Old 04-22-2012, 10:11 PM   #13
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Quote:
Originally Posted by sergey2007 View Post
I'm serious in the future the turbo 253 engine. And I intend to do it competently. Ready turbo kit is expensive and I think there is nothing supernatural. The same can be done independently. The main thing to strictly control the boost and fuel mixture. I understand that, ideally, a little lower compression ratio, but do not want to disassemble the new engine - I prefer the first stage to do a little boost (0.3 bar).
Hey one of the most knowledgeable Subaru guys gave you 4 options. If you cut corners and do this you will HAVE to exercise one of those options so why not skip the trouble ?
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Old 03-07-2021, 07:16 AM   #14
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Maybe the bottom end will blow up... so what... go get a 205 207 255 257 block and use sohc heads afterward. Oil feed from oil pump, return to the pan, coolant in and out through water heater heater. You could drill and tap your valve cover but then you’re dumping hot turbo oil on your valvetrain. My setup is a 251/257 with 253 intake manifold. 251 IM allows more room for the turbo if you use aftermarket fuel lines and rails. 253 IM has more aftermarket support. I’ve run 6-8psi with no intercooler without issue in the infancy of the build, but with an sti block.
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Old 08-28-2021, 02:53 PM   #15
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Default Bumping old thread

Hey guys. Mainly making a post so I can post in classifieds so dismiss me for wasting any time. I have an 06 2.5i and looking to turbo it. I have an 03 wrx engine I tried to swap but didn't work out. Now thinking about taking the internals out of the wrx and putting them in the 2.5i. Maybe another learning experience but hopefully it works out.
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Old 08-28-2021, 03:55 PM   #16
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100$ for sti rods, and get some used forged pistons and npr rings. Crank will be fine. Then ur going to want some E85. Heads flow ok, nothing from the 2.0 will fit the 25
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Old 08-28-2021, 03:56 PM   #17
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I’d do a 3.6l before I boosted the 253
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Old 08-31-2021, 02:41 PM   #18
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Keep in mind that the EJ253 is not just an NA version of the EJ255 or EJ257, it is a single cam motor with high compression and weaker internals that are not suited to handle boost. It would be much easier and likely cheaper long term for him to buy a WRX motor or even an JDM turbo motor that can bolt up to his stock 5 speed with less modification than an STI motor swap
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