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01-15-2006, 08:34 AM | #1 |
Scooby Newbie
Member#: 86298
Join Date: May 2005
Location: allentown, PA
Vehicle:98 LGT Wagon Full WRX driveline & dash |
ej25 shortblock identification question
can anyone tell me the what to look for in figuring out what year a shortblock is from? i found a guy that has a shortblock but he isnt sure about what year it came from and i dont want a newer shortblock to up the cr. i want to try to stay with the 97-98 style for my 97 outback legacy.
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01-15-2006, 10:52 AM | #2 |
Scooby Guru
Member#: 120
Join Date: Jul 1999
Chapter/Region:
AKIC
Location: Where the Navy sends me...
Vehicle:1997 Legacy 2.5GT 1996 Impreza coupe |
This thread - http://forums.nasioc.com/forums/showthread.php?t=883746 - has some good information about determining which is which.
Pat Olsen '97 Legacy 2.5GT sedan |
01-15-2006, 02:15 PM | #3 |
Scooby Guru
Member#: 5218
Join Date: Mar 2001
Chapter/Region:
MWSOC
Location: SAUL'S Motorsports
Vehicle:96L Most Over- Developed Beater |
The easiest way is to look at the pistons if you know they are stock. Since you want an early series motor, you'll want to see pistons with a large square-type depression across the face of the pistons. If the block is the newer type, the pistons will have a flat top with small moon shaped recesses for the valves.
Either type will be just fine if you're going to just build a daily driver. Jay Storm |
01-15-2006, 03:36 PM | #4 |
Scooby Newbie
Member#: 86298
Join Date: May 2005
Location: allentown, PA
Vehicle:98 LGT Wagon Full WRX driveline & dash |
what type of compression would i be looking at if i go with the newer block, i don't want to have to run premium all the time.
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01-16-2006, 12:17 PM | #5 |
Scooby Guru
Member#: 832
Join Date: Jan 2000
Chapter/Region:
RMIC
Location: Teh Ghetto Garage, CO
Vehicle:99 2.5RS, '85 911 '73 914 and 2012 BRZ |
Going to have to run premium if you build a hybrid with EJ22 heads regardless of which Ej25 bottom end you use...
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01-16-2006, 04:33 PM | #6 |
Scooby Guru
Member#: 5218
Join Date: Mar 2001
Chapter/Region:
MWSOC
Location: SAUL'S Motorsports
Vehicle:96L Most Over- Developed Beater |
I think he may be re-using the 97 EJ25D heads from the legacy. He should be fine with regular gas....I've gone back to cheap gas on my setup....and it's got more compression than he'll have.
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01-16-2006, 05:10 PM | #7 |
Scooby Newbie
Member#: 86298
Join Date: May 2005
Location: allentown, PA
Vehicle:98 LGT Wagon Full WRX driveline & dash |
does anyone have any idea on numbers even somethin close
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01-16-2006, 07:17 PM | #8 |
Scooby Newbie
Member#: 59357
Join Date: Apr 2004
Chapter/Region:
E. Canada
Location: Ottawa, Canada
Vehicle:2009 Forester XT White |
What setup are you running Storm, I'm going for a phase 2 bottom end with 98 dohc heads. What type of numbers do you get?
Thanks Frazer |
01-16-2006, 08:51 PM | #9 |
Scooby Newbie
Member#: 86298
Join Date: May 2005
Location: allentown, PA
Vehicle:98 LGT Wagon Full WRX driveline & dash |
im cool with a phase 2 as long as i dont have to run premium, can anyone confirm that should be the case?
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01-17-2006, 01:28 AM | #10 |
Scooby Guru
Member#: 5218
Join Date: Mar 2001
Chapter/Region:
MWSOC
Location: SAUL'S Motorsports
Vehicle:96L Most Over- Developed Beater |
I'm running a 00' EJ25 bottom end with shaved 98RS heads and .046" Cometic headgaskets. I started off running premium because I was getting misfires and knock. It turned out to be bad gas from sitting too long. Now I run 87-89 and have no problems. I use an Apexi SAFC to dial in fuel trims...but only because I'm running this motor on a 1.8L ECU.
CR numbers should be about 11:1....but I didn't do any cc'ing of anything on this motor. I followed the info posted here and other forums, which has proven to be hit and miss at best. I knew I mighta needed premium and accepted it. Now I'm happy I can run regular. xrturbo: I have a few phase I shortblocks if you need one asap. Might even trade ya for a phase II!!! Jay Storm |
01-17-2006, 10:49 AM | #11 |
Scooby Newbie
Member#: 58806
Join Date: Apr 2004
Location: New york
Vehicle:1998 RIP Legacy2.5GT 2.2L legacy wagon |
Storm do you have any dyno numbers on this setup ...
Also wat other modifications do you have ..... I may be going with the same setup in my legacy come spring time but im not totally sure how much worth it, it would be... |
01-17-2006, 11:04 AM | #12 |
Scooby Newbie
Member#: 59357
Join Date: Apr 2004
Chapter/Region:
E. Canada
Location: Ottawa, Canada
Vehicle:2009 Forester XT White |
This is exactly what I"m doing, I just picked up these
http://cgi.ebay.com/ebaymotors/ws/eB...RK%3AMEWN%3AIT and hope to find a phase 2 shortblock. What type of numbers are you putting down Jay? if not numbers, what does the butt dyno tell you? I'm planning on running this in my 98 forester which has the dohc at the moment, so it should run fine with the new setup. Frazer |
01-17-2006, 11:53 AM | #13 |
Scooby Guru
Member#: 832
Join Date: Jan 2000
Chapter/Region:
RMIC
Location: Teh Ghetto Garage, CO
Vehicle:99 2.5RS, '85 911 '73 914 and 2012 BRZ |
Xephyr has a phase II ej25 w/DOHC heads and HKS v3 STi 272degree cams in it that puts down 155whp...
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01-17-2006, 12:33 PM | #14 |
Scooby Newbie
Member#: 59357
Join Date: Apr 2004
Chapter/Region:
E. Canada
Location: Ottawa, Canada
Vehicle:2009 Forester XT White |
is he running headers? or an intake? What could be done to bump this up a bit?
Frazer |
01-17-2006, 12:58 PM | #15 |
Scooby Guru
Member#: 832
Join Date: Jan 2000
Chapter/Region:
RMIC
Location: Teh Ghetto Garage, CO
Vehicle:99 2.5RS, '85 911 '73 914 and 2012 BRZ |
He's got Borla knockoff and a JC sports intake. He has recently installed a Link to play with it more. I haven't talked to him in a month or so and don't know how it has worked out...
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01-17-2006, 03:32 PM | #16 |
Scooby Guru
Member#: 5218
Join Date: Mar 2001
Chapter/Region:
MWSOC
Location: SAUL'S Motorsports
Vehicle:96L Most Over- Developed Beater |
I don't have any dyno numbers. The butt dyno is telling me I'm making at least as much as our RS and can peddle around with it. The stock revlimiter on the 1.8ECU comes in real quick everywhere but 5th....and that's only because I primarily use it to go to work and don't see a need for much more than occasional triple digits.
Quick rundown: '00 bottom end .046" headgaskets DOHC heads shaved ~.010" (ported&polished) stock RS cams USDM STi valvesprings/retainers EJ20G intake manifold EJ18 TB EJ18 ECU and sensors 98RS injectors/rails/fpr Apexi SAFC RS fuelpump EJ25 Fidanza flywheel MRT header (half-catted) 96 brighton trans |
01-17-2006, 04:12 PM | #17 |
Scooby Guru
Member#: 832
Join Date: Jan 2000
Chapter/Region:
RMIC
Location: Teh Ghetto Garage, CO
Vehicle:99 2.5RS, '85 911 '73 914 and 2012 BRZ |
I wish you would get that car on the dyno. I have a curiousity to know what Pnp head do on stock cams. I was contemplating putting my Pnp heads on the '95 to run with the SC and see what that does...
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