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Old 09-09-2001, 10:25 AM   #1
Kruf
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Join Date: Oct 2000
Location: sparta tn us
Default Need engine, what to ask for?

Hey guys, my 97 GT is getting some pretty bad piston slap lately.
I am kinda new to the Subarus and I need to know what to look for in an engine. I know that there are two types of EJ25's,
open deck and closed deck (I think). What years do each come from and which cars, and are there any specifications I need to stay away from? I have also heard that there was an upgrade to the pistons in certain years to prevent the cold piston slap problem with longer piston skirts, anyone with any info on this? I am considering an imported Japanese engine, as I can have any shipped over, what should I ask for? (By the way, what the hell is a B4?)
Michael
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Old 09-09-2001, 12:11 PM   #2
Legacy GTR
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Location: Litchfield Park, AZ
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14.767@93.54

Default B4

The B4 is a turbocharged version of the Legacy availiable in Japen, some other countries, and I think starting this year in Aussie land. There is some rumers about it coming here in 2003-4, but rumers they are (right now). Can't help you really other then that. If your going to import and engine, get the Sti- 6 speed. I hear it's really good, but expensive. If you have an auto like me, your prolly going to need somebody to rebuild your transmission. I don't have any idea if you'll be able to find a B4 engine to import, but people have brought over WRX engine's lot's of times.
Good luck,
Mike
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Old 09-09-2001, 05:07 PM   #3
Kruf
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I have a 5 spd 97 GT.I would like to go turbo, but for now I would be happy with an engine that doesnt make so much noise. What years ere the B4's made?
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Old 09-09-2001, 06:48 PM   #4
JoeT
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You can get a complet Phase 2 SOHC engine for about $2500.00 Canadian.

Call these people http://www.japanautoparts.com

They also have Ver 5 non STI 280 HP engines in stock complete with tranny ECU, Drive shafts, etc. Complete.
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Old 09-09-2001, 07:02 PM   #5
Jonathan
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Location: Natick, MA USA
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1999 Legacy GT Ltd
Quick Silver Metallic

Default Re: Need engine, what to ask for?

Quote:
Originally posted by Kruf
Hey guys, my 97 GT is getting some pretty bad piston slap lately.
I am kinda new to the Subarus and I need to know what to look for in an engine. I know that there are two types of EJ25's,
open deck and closed deck (I think). What years do each come from and which cars, and are there any specifications I need to stay away from? I have also heard that there was an upgrade to the pistons in certain years to prevent the cold piston slap problem with longer piston skirts, anyone with any info on this? I am considering an imported Japanese engine, as I can have any shipped over, what should I ask for? (By the way, what the hell is a B4?)
Michael
Good questions, Michael -

Piston Slap is fairly common on all the EJ25 'Phase I' motors. Depending on how much milage you have on your 'ru' you *may* qualify for having it fixed at SoA's expense (I think they have some sort of a 'secret warranty' on this).

Both the Phase I and the Phase II EJ25 motors are open deck designs. The significant difference is that the Phase II is a SOHC 16V, and the Phase I is a DOHC 16V. The Phase II offeres more low-end torque, and is *THOUGHT* to be more reliable.

The Phase I engine was first introduced in 1996 (I think), although improved to 165 BHP in '97. The Phase II engines were introduced in 1999 although the Legacy's (being built in the USA) didnt see this engine untill the new 2000 body style came out. Interestingly enough some of the later 1999 Legacys built in the US featured a "hybrid" combination of the Phase II engine block coupled with the Phase I cylinder heads. (I presume SoA ran out of Phase I engine blocks).

The engine block of choice to get from Japan is the EJ22T that features a closed deck design and is suitable for turbo-charging.

My understanding is the B4 is Subaru's high-performance domestic market Legacy featuring a 2 litre turbo engine, and some sporty trim, upolstery, and suspension & brake upgrades.

Good luck with your Legacy.
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Old 09-09-2001, 07:12 PM   #6
Jonathan
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Default

Quote:
Originally posted by JoeT
Call these people http://www.japanautoparts.com

They also have Ver 5 non STI 280 HP engines in stock complete with tranny ECU, Drive shafts, etc. Complete.
<perk> a 280BHP engine in stock ?
Hmmm... how much ?

What involved in getting one of these installed ?

Will it pass a US emmission inspection ?
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Old 09-10-2001, 07:39 AM   #7
JoeT
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I don't really know how much it is. I saw it on a tour of their facility. Nice place, 40000 square feet full of toys (japanese engines including an H-6). They ship stuff all over North America.

Go to their web site and Email Bruce. He's great to deal with.
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Old 09-10-2001, 09:03 AM   #8
MY99 2.5GT
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12 Legacy GT 13 Armada

Default

The Japanese Legacy B4, from what I understand, is an EJ20 open deck configuration with a sequential twin turbo setup. One small turbo for fast spooling low rev power and another larger turbo for hi rev power. The turbos wastegated are electronically controlled by the engine computer to allow a smooth transition of boost when going from 1 turbo running to both. I have also heard there is some kind of valve in the exhaust line that can be partially closed to create more back pressure? This also is controlled by the engine computer.

As a whole I don't know of a single person who has transplanted one of these highly complex Japanese left hand drive engines in there American right hand drive vehicle. I know it would take a little effort to re run various water/air lines to make the engine and turbos fit but I'm sure it could be done.

About the STI six speed. I don't know if it is even available for LHD vehicles or if it even matters. I know that most of the Japanese motors will bolt right up to our trannies. The problem is our stock trannies won't hold together for very long if you put more than about 210-215 hp to it. You may consider a half dog box or some other racing tranny.

Heres another engine option. How about the 230 hp 228lb ft 3.3 litre naturally aspirated H6 from the SVX. It shouldn't be hard to find one of these for a good price. Actually I saw a fairly low miles one on ebay about two months ago going for under $1000. I have heard of a few people doing this and mounting it up to a 5 spd with success. By the way there was a company around in the mid 90s that made a botl on 450hp twin turbo kit for the 3.3 litre SVX motor. I thought I would add that for future concideration.

Brad
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Old 09-10-2001, 10:26 AM   #9
Kruf
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Default

Please please please explain open and closed deck design, these boxer engine confuse me (I am a rotary engine mechanic, and I am tempted to do a conversion :P).
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Old 09-10-2001, 12:02 PM   #10
sybir
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Yes.

Default

closed deck: the cylinders are bored out of the block, the cylinder may have a liner of a hard/low friction metal

open deck: the cylinder is a seperate piece; its walls are freestanding, located by th block at the base, and the cylinder head at the top. Coolant thus circulates the entire cylinder (most hondas use this design)

basically, a closed deck is stronger because the cylinders don't move or distort under high compression conditions.....
some companies make deck inserts, that tie the top of the cylinder together for added strength, but i've only ever seen them for the D & B series honda motors...........
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Old 09-10-2001, 12:46 PM   #11
Teh Legacy
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Question Piston Slap?

Hmmm....i'm not sure, but i think i may have a little bit of piston slap on my 97 GT sedan. since about 62,000 miles it's been making a clicking sound that speeds up and down with the RPM....anyone gimme a hint on what's wrong? also i think i may have gotten a bad tank of gas, but not sure. I'm not getting the usual horsepower until i hit 5,000 RPM, then you can hear a difference in the engine and exhaust sound. it's getting to the point that my 0-60 times have increased pathetically for no apparent reason. help?
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