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Old 06-19-2012, 02:52 AM   #1
eg33GC
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Default v1/2, which came with non-hla heads?

I'm trying to get a better grasp on which engines for the G came with the "good" valvetrains, rather than the HLA. Valve float past 6500rpm is terrible.


The engine I recently tore down was a closed deck, forged piston, standard intake manifold G, with a 1993 date according to the oil cap. I was super bummed to see HLA under the cams.

Also, anyone have a legitimate source for some heads? The Brits seem to trash their stuff or have no regard for keeping the integrity of the shims/buckets in line with their heads they sell.
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Old 06-19-2012, 10:23 AM   #2
suberdave
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i beleave it was only the STI RA's that got the non hla heads.

-=Suberdave=-
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Old 06-20-2012, 06:44 AM   #3
Marnix
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Yes and the RA was the only one to have forged pistons, so you might want to check those buckets again for shims underneath them

I can identify the heads based on pics of the cams by the way.
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Old 06-25-2012, 01:03 AM   #4
eg33GC
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the buckets look like eg33 buckets, however, there are metal rings at the bottom of the springs.. If this is hla this does not share that with the svx, which oddly could benefit from a steel base because of the dual springs and 7800 stock valvetrain safety limit
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Old 06-25-2012, 01:03 AM   #5
eg33GC
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Old 06-25-2012, 04:02 AM   #6
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STi non RA also came with forged pistons.
So it is quite possible the motor you have is out of a V1/V2 STi non RA.
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Old 06-25-2012, 07:17 AM   #7
Marnix
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The early EJ20G WRX engines had three types of pistons:

Stock MT WRX/WRX RA cast pistons built between May 1992 and August 1996

Stock AT WRX cast pistons built between May 1993 and August 1996

Forged WRX STI and STI RA pistons built between June 1994 and August 1996

The non-HLA high rpm valve train only came WRX RA and WRX STI RA engines built between June 1994 and August 1996.
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Old 06-26-2012, 01:10 AM   #8
eg33GC
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I assume these are forged, because I never have seen a cast piston with this quality.
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Old 06-26-2012, 02:19 AM   #9
Marnix
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The left one is forged, the right one is cast.
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Old 06-26-2012, 02:45 PM   #10
eg33GC
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And those are out of this engine. I posted the image of the camshaft above, do you need a better one?

The buckets are identical to eg33, which are HLA.
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Old 06-26-2012, 04:56 PM   #11
Marnix
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Based on the forged pistons, the HLA lifters and the grooves on the camshaft I'd say you have a 1994-1996 WRX STI engine (no RA). Was the white sticker with the engine code still present on the center belt cover by any chance?
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Old 06-26-2012, 05:03 PM   #12
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Quote:
Originally Posted by eg33GC View Post
And those are out of this engine. I posted the image of the camshaft above, do you need a better one?

The buckets are identical to eg33, which are HLA.
Sorry, are both pistons (left and right) out of the same engine??
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Old 06-27-2012, 01:37 AM   #13
eg33GC
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The trans was a b3CA, indicating a normal STi.

It was the forged with hla that got me confused, since I see all the time here that forged= cant have hla
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Old 06-27-2012, 05:01 AM   #14
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That's a misunderstanding I have contributed to aswell. This topic got me to examine the factory documentation AGAIN and it showed the 94-96 STI also got forged pistons, not just the RA. But only the RA got the solid valve train.
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Old 06-27-2012, 01:37 PM   #15
rob
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Also keep in mind that the ver1/2 STis were listed as having "Lightweight" HLAs. I don't think anybody has weighed the differences, but it was confirmed that STi parts were different part numbers.

-Rob
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Old 06-27-2012, 03:14 PM   #16
eg33GC
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somebody should weigh their standard wrx hla, then I will weigh these.


Also, get rings for a 02wrx for these pistons?
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Old 06-29-2012, 07:28 AM   #17
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No the EJ205 rings do not fit.

Stock HLA 13230AA160 weight 51.0 gramm
STI HLA 13230AA170
Solid RA bucket 13228AA000
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Old 07-02-2012, 08:54 AM   #18
eg33GC
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Okay, what rings then? Time for some japanparts?
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Old 07-02-2012, 11:04 AM   #19
Marnix
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Maybe or try Ebay.co.uk for EUDM EJ20G rings. OEM numbers are 12033AA730 for STD size, AA740 for 0.25 OS or AA750 for 0.5 OS. These rings fitt all 1992-1998 EJ20G and EJ20K engines. Thickness 1.2 - 1.5 - 3.0 mm.
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Old 07-02-2012, 04:34 PM   #20
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Here is a set that would work but I don't have any idea if it is a decent price for them or anything about the seller. http://www.japanesemotorspares.co.uk...set-12033aa730
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Old 07-03-2012, 02:47 AM   #21
Marnix
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That's quite expensive! I can match that price in Euros for a OEM Subaru set and aftermarket I can get for about half.
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Old 07-03-2012, 02:49 AM   #22
eg33GC
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Think these are worth the trouble? I may as well just buy $450 Wiseco forged pistons for the price of rings.
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Old 07-04-2012, 02:18 PM   #23
Marnix
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Yes and sell me your original forged pistons
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Old 07-04-2012, 05:38 PM   #24
eg33GC
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partially trade you for some K heads!
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Old 07-05-2012, 03:17 AM   #25
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I just traded my last set of K heads...
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