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Old 03-05-2008, 05:04 PM   #1
Inder
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Default EJ251 vs EJ252

Hi,

I am hoping someone might be able to clarify this as I can't seem to find any information on the internet.

On my engine is wrote EJ252 (USDM - Fuji Heavy Industries - Production date 01/1999), I know that it is a SOHC engine. However it seems that there are cars of the same year with an EJ251 engine.

As I was purchasing my borla headers today, and confirming the fitment on the Borla website, I noticed this:

My application:

2000 Subaru Legacy GT Sedan
2.5L 4cyl VIN 6 EJ252 MT 5 Spd AWD

However, after choosing 2000 Subaru Legacy GT Sedan on their website I could have chosen sub-model:

2000 Subaru Legacy GT Sedan
2.5L 4cyl EJ251 MT 5 Spd AWD

The headers are the same "part#: 17183" for both sub-models, but apparently the car can have either of the 2 engines...

So, my question is, what is the difference in the EJ252 engine from the EJ251... I am thinking about buying the AVO turbo kit from Rallitek in the near future and I am trying to understand my engine as best as possible.
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Old 03-05-2008, 05:23 PM   #2
DLC
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It's a good question. I've got the same car, and mine probably also says it's a 251, but I really am not clear on the differences. Either way the headers and turbo kit should work fine.

Make sure you get a Baja Turbo hood and all the proper parts for the scoop before you install that turbo kit though
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Old 03-05-2008, 06:28 PM   #3
Inder
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Default

Thanks for the reply DLC, my engine is 252 and yours is 251 you say? Odd, I Hope someone can tell us the differences.

What do you think is more cost-effect / better choice, purchasing a BAJA hood, or getting a scoop custom-added to my current hood?
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Old 03-05-2008, 06:44 PM   #4
DLC
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I'm not saying mine's one and yours is the other. Mine is the same year, so it's probably the same. I don't know what the differences are between the -1 and -2 or even the -3.

If you can find someone you trust to chop a hole in the hood, then do it. I've not looked to see if a stock hood has bracing where the scoop would normally be.

Also consider getting a front-mount intercooler setup. Keep you stock hood, have less heat soak and be a bit more discrete.

I, for one, wouldn't recommend turbocharging your stock engine, as they're a bit brittle. Best to spend that $3500 towards a full swap and do it right.
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Old 03-05-2008, 08:03 PM   #5
Inder
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Yeah I certainly agree, I'll go to the best body shop around and see what they say...

FMIC was my original choice, however I've been told that it would require more parts and modification to the kit, and provided ECU and possibly cause turbo lag because of longer piping..

And the engine of course like you say, was not not meant for turbo, so anything could happen...

Oh well, decisions, decisions, just going to enjoy the borla's for this summer and ponder it for my next winter project :P
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Old 03-05-2008, 08:46 PM   #6
dbarras
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Old 03-05-2008, 09:41 PM   #7
Inder
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Yeah I replied on that thread a year ago, they seemed to be making progress on the topic, but then it died...

WJM seems to know the most about the topic...

From what I read the the EJ251/252/253 are all similar but different pistons and blocks?

I wonder which of the 3 engines is stronger..
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Old 03-06-2008, 01:23 AM   #8
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Quote:
Originally Posted by Inder View Post
Yeah I replied on that thread a year ago, they seemed to be making progress on the topic, but then it died...

WJM seems to know the most about the topic...

From what I read the the EJ251/252/253 are all similar but different pistons and blocks?

I wonder which of the 3 engines is stronger..
Relatively, maybe one is slightly stronger, but quantitatively they're all pretty much the same in terms of strength and susceptibility to take boost (speaking of the OP's originaly intentions).
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Old 03-06-2008, 03:18 PM   #9
Inder
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Only way to find out is trial and error I guess :P
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