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Old 02-01-2012, 10:59 PM   #1
simprezl25
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Default ej20 **CLASSIFICATION**

hi, so i got my hand on i know is a closed deck ej2.0 but im not sure if its a G or K. and what the specs of THIS engine
and is this block forged piston, rods and crank? also 8.5:1 cr? i appreciate the help.
Ive seen posts of EJ20 but nothing concrete.
here are some pics







*plans with block: port and polish stock heads with upgraded cams<--undecided
rotated intake mani- turbo location...undecided with a blouch 18g

i hear its cut and clean just swapping the short block.
-use the usdm crank sprocket and ej20g head gaskets with a retune
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Old 02-02-2012, 05:34 AM   #2
Marnix
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There have never been closed deck EJ20K engines. There's only one EJ20G closed deck engine with forged pistons and that's the 1994-1996 type RA engine with shim under bucket valve setup. If you could post a picture of the cams (they have more duration than the stock WRX cams already) I can identify it for you.

EVen if the pistons are forged the weak link is still the rods, best is to replace them with STI EJ257 or Eagle or better.
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Old 02-02-2012, 10:08 AM   #3
RallyColtTurbo
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Is this going into the '02 listed in your profile?

If so, there is no magic about a closed deck block. Especially if it's going into a USDM WRX. Build it just like you would ANY EJ20 shortblock for use with EJ205 heads. The only difference that needs special attention is to use phase 1 crank bearings. Other than than, spec it and build it just like it was the stock shortblock.

I'm not familier with piston shapes, but from my experience, BY FAR the most common EJ20 closed deck blocks come from early Legacies - which have pistons that won't work well with non-early-Legacy heads. The early Legacies had huge head volume and small piston dish, so the compression would be really high with any of the later heads.

I agree with the rods being the weakest link
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Old 02-02-2012, 10:43 AM   #4
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These pistons are 1992-1996 WRX pistons. But if you want to take full advantage of the FCD then I agree you need forged pistons and decent rods.
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Old 02-02-2012, 11:27 AM   #5
simprezl25
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Quote:
Originally Posted by Marnix View Post
There have never been closed deck EJ20K engines. There's only one EJ20G closed deck engine with forged pistons and that's the 1994-1996 type RA engine with shim under bucket valve setup. If you could post a picture of the cams (they have more duration than the stock WRX cams already) I can identify it for you.

EVen if the pistons are forged the weak link is still the rods, best is to replace them with STI EJ257 or Eagle or better.
here ya go:




i didnt mean to say ej20K; i have a G. and i was told to look under my oil cap to find out the engine built year and it says 94.
did some wiki'ing and found this:2. Bucket-style HLA EJ20G usage:

* Impreza WRX 92~96
* Impreza WRX Wagon 92~96
* Impreza WRX STI 93~96
* EUDM Subaru Impreza Turbo 94~96

Power output ranges from 220 PS @ 6000 rpm and 260 Nm for the WRX Wagons to 275 PS @ 6500 rpm and 319 Nm for the WRX STI Version II. Engines can be identified by coil on plug with 1 M8 bolt per coil and valve covers with 4CAM 16VALVE and horizontal lines above the plug holes. Generally these engines all have the slanted intercooler. Some engines may not have HLA buckets but solid buckets with shims underneath. These engines also feature lighter valves, the intake valves are marked INKO and the exhaust valves are marked EXKO. The standard HLA valves are I252 and E283 respectively. All WRX Wagon engines and automatic sedan engines came with a TD04 with 90 deg elbow, all manual WRX sedans including STI versions all had a TD05 with 90 deg elbow.

Last edited by simprezl25; 02-02-2012 at 11:45 AM.
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Old 02-02-2012, 11:35 AM   #6
simprezl25
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Quote:
Originally Posted by RallyColtTurbo View Post
Is this going into the '02 listed in your profile?

If so, there is no magic about a closed deck block. Especially if it's going into a USDM WRX. Build it just like you would ANY EJ20 shortblock for use with EJ205 heads. The only difference that needs special attention is to use phase 1 crank bearings. Other than than, spec it and build it just like it was the stock shortblock.

I'm not familier with piston shapes, but from my experience, BY FAR the most common EJ20 closed deck blocks come from early Legacies - which have pistons that won't work well with non-early-Legacy heads. The early Legacies had huge head volume and small piston dish, so the compression would be really high with any of the later heads.

I agree with the rods being the weakest link
yes its going in my 02 and id say it is worth it from a reliability stand point being closed deck. my plan now is to stroke it with forged internals
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Old 02-02-2012, 11:39 AM   #7
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Quote:
Originally Posted by Marnix View Post
These pistons are 1992-1996 WRX pistons. But if you want to take full advantage of the FCD then I agree you need forged pistons and decent rods.
yeah i think ur right got verification is a 94, what is FCD?
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Old 02-02-2012, 11:45 AM   #8
RallyColtTurbo
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FCD = Fully closed deck.

I didn't mean to say it wasn't worth it, I was just saying that you don't pick your parts based on it being a closed deck (other than main bearings). You pick your parts as if you were building any other high HP, high reliability EJ205. You pick your pistons and head gasket based on your heads and desired compression ratio. All machiing is the same whether open or closed deck....ect.
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Old 02-02-2012, 01:07 PM   #9
simprezl25
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Quote:
Originally Posted by RallyColtTurbo View Post
FCD = Fully closed deck.

I didn't mean to say it wasn't worth it, I was just saying that you don't pick your parts based on it being a closed deck (other than main bearings). You pick your parts as if you were building any other high HP, high reliability EJ205. You pick your pistons and head gasket based on your heads and desired compression ratio. All machiing is the same whether open or closed deck....ect.
thats real helpful man thanks! i would really like a cr what give torque to the 2.0 along with the ej257 crank

decisions
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Old 02-11-2012, 11:25 AM   #10
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I'm trying to find info on a 92 jdm wrx, mainly some info on the vacuum system because i have a couple of hoses that are plugged with screws. Also Im trying to find out what car exactly i have from looking at the plate under the hood.
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Old 02-12-2012, 03:43 AM   #11
Marnix
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PM me the VIN and I can tell you exactly what you have and when it was built.
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Old 02-12-2012, 04:03 AM   #12
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Looks like a version II STI engine. Maybe RA one.
Looks similar to my old one, the cam profiles in particular. Could be wrong though.
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Old 02-12-2012, 04:09 AM   #13
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The cams are not stock WRX might be STI or type RA.
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Old 02-21-2012, 01:56 AM   #14
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Is that a quote?

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Old 02-21-2012, 08:18 PM   #15
simprezl25
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Quote:
Originally Posted by lphin1983 View Post

There have never been closed deck EJ20K engines. There's only one EJ20G closed deck engine with forged pistons and that's the 1994-1996 type RA engine with shim under bucket valve setup. If you could post a picture of the cams (they have more duration than the stock WRX cams already) I can identify it for you.
Quote:
Originally Posted by Marnix View Post
Is that a quote?

curious if you guys are still talking about thye block i have in the thread? i still havent had cionfirmed classification
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Old 02-22-2012, 04:16 AM   #16
Marnix
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Based on the block, pistons and cams I would say it's an EJ20G WRX STI with option code 62C built between May 1st 1993 and September 30th 1994.
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Old 02-22-2012, 12:36 PM   #17
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Quote:
Originally Posted by Marnix View Post
Based on the block, pistons and cams I would say it's an EJ20G WRX STI with option code 62C built between May 1st 1993 and September 30th 1994.
thats great news so it comes forged.
whats option code 62c?
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Old 02-22-2012, 02:44 PM   #18
Marnix
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No. Cast pistons and stock rods.

Option code 62C was closed deck on the STI if I understand the parts catalogue correctly.
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Old 02-23-2012, 10:06 AM   #19
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Quote:
Originally Posted by Marnix View Post
Based on the block, pistons and cams I would say it's an EJ20G WRX STI with option code 62C built between May 1st 1993 and September 30th 1994.
Quote:
Originally Posted by Marnix View Post
No. Cast pistons and stock rods.

Option code 62C was closed deck on the STI if I understand the parts catalogue correctly.
cool man marnix thanks for lookin out man
yeah ive been thinking about all sorts of options for this block
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