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Old 08-09-2005, 01:21 PM   #1
PDXTuning
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Default JDM and EUR Spec Bonanza!

As some of you have seen from some of my other posts, I have been trying to build up a library of part and model information for the JDM and European/Australian models. I recently got most of the missing information, and have compiled it together. This includes all of the production engine numbers, as well as a select number of other internal parts.

The only piece of info I am missing is the new US 06 stuff. If anyone happens to have access to a copy of the Subaru FAST update disk from July 05, drop me a line (I have the June 05 update, but it doesn't have the new 06 stuff).














Observations about different model changes:

JDM

General

The first model year of the new age style (bug eye) had two parts. The A.1 model section appears to use some parts that carried over from the Version 6 cars, while the A.2 included more new parts.

Blocks (Crankcase only in the JDM case)
The block numbers (not short block, just crank case) has stayed the same for all MY WRXs from MY01 to 05. The STI blocks changed in the MY03, so version 7 crankcases appear to be different from the

Version 8 and Version 9. Also note that Spec C crankcases are the same as the regular STI crankcases.

11008AA690: MY01,02,03,04,05 WRX
11008AA720: MY01,02 STI
11008AA980: MY03,04,05 STI

Pistons:

The WRX pistons were unique for MY01, and changed for MY03. These changed pistons in MY03(version 8) were carried all the way forward to MY05. The STI pistons changes at the MY03 (version 8), and it is said that these new pistons were Hypereutetic instead of forged. Again note that the Spec C has the same pistons as the regular STI in each model year.

12006AB190: MY01 WRX
12006AC150: MY02,03,04,05 WRX
12006AB430: MY01,02 STI
12006AC430: MY03,04,05 STI

Crankshaft:

All MY01s and 02 use the same crank shaft PN, including the STI and Spec C. Note that the crank was updated however (from 210 to 240), and all replacement cranks in all WRXs are spec'd to use this new part. All WRXs from MY01 to MY05 use this same crankshaft. In MY03 (version 8) the STI and Spec C received a new crank. This new crank was carried forward for all STIs in MY04 and MY05.

12200AA210: MY01,02,03 WRX MY01,02 STI
12200AA240: MY01,02,03 WRX MY01,02 STI [UPDATED]
12200AA270: MY03,04,05 STI

Rods:

WRX rods received an update across all of the models sometime on 03. MY01 and MY02 STIs used the same rods. MY03 STIs received a new rod. All STI model years were updated to a newer rod (x180), which is the same rod used in the US STI.

12100AA081: MY01,02,03,04 WRX
12100AA190: MY01,02,03,04,05 WRX [UPDATED]
12100AA161: MY01,02 STI
12100AA170: MY03 STI
12100AA180: MY01,02,03,04,05 STI [UPDATED]

Cams:

The MY01 and MY02 WRX used the same cam. Al MY01 STIs used the same cam. In MY02 the Spec C was given a special cam, and that special cam was used in ALL STIs in MY03. In MY03 all WRXs got a new cam, and again a new cam in 04/05. All STIs also got a new cam in 04/05. Note that all Spec Cs after MY02 use the same cam as the regular STI.

13037AA200: MY01,02 WRX
13037AA220: MY01 ALL STIs, MY02 STI
13037AA340; MY02 STI RA Spec C, MY03 ALL STIs
13037AA401: MY03 WRX
13037AA470: MY04,05 WRX
13037AA480: MY04,05 ALL STIs

Heads:

This is interesting note. All the WRXs and STIs in MY01 and 02 are the same. In looking at these motors, the Spec C in MY02 appears to have a more ported inlet, even though it is the same casting. I suspect that the 'porting' is part of the engine build process, but when you buy a replacement head, this porting is not done. From what others have told me, this is the same with the Acura Integra Type R (When you buy a replacement factory head, it is not ported like the production car ones are).

Also note that in 03, all WRXs and STIs got a new head, carried to 04 and 05. For this reason, I'm assuming that the 04 and 05 WRXs and STIs use the WRX/JDM style cam sensors (3 sensors), not the new 2 sensor system used on the fly-by-wire US STI. (Actually I checked, and the cam sensors on all of the JDM cars has remained the same, so yes, the JDM WRX and STIs still use the older style. I suspect this will change in 06 with the JDM switch to drive-by-wire.

11039AB370: MY01,02 All WRXs and STIs
11039AB660: MY03,04,05 All WRXs and STIs

Valvesprings:

Notice WRX valvesprings are the same as the USDM ones. MY02 STI Spec Cs had a unique sping, which was not used again. When subaru went to the larger Spec C cams in 02, they must have tried a new spring. In MY03, when all STIs got the same Spec C cam, they decided to go back to the regular STI
spring. Perhaps the MY02 Spec C spring was too strong. Also the MY03 and up WRX got a new spring.

13217AA193: MY01,02 WRX
13217AA202: MY01 All STIs MY02 STIs (not Spec C), MY03,04,05 All STIs,
13217AA251: MY03,04,05 WRX
13217AA280: MY02 STI Spec C

US Market Cars:

Blocks (Complete Shortblocks)

10103AB330: MY02,03,04,05 WRX
10100AB440: MY04,05 STI

Pistons:
12006AC350: MY02,03,04,05 WRX
12006AC390: MY04,05 STI

Crankshaft:

As with the JDM market, the 02 WRX crankshaft was updated, and all MY03 and greater WRXs use this new crankshaft. I personally observed that my 02 Spec C crank was double drilled, while my stock WRX crankshaft was single drilled. I suspect the double drilling may have been the change from (0x210) to (0x240). Anyone with an 04 or 05 WRX crank could confirm this.

12200AA210: MY02 WRX
12200AA240: MY02,03,04,05 WRX [UPDATED]
12200AA260: MY04,05 STI

JDM Overlap:
WRX Crankshaft is same as JDM MY01-05 WRX crankshaft, as well as the JDM MY01,02 STI crankshaft.

Rods:

WRX rods when thu several iterations, starting in the MY03 and again in MY04. MY05 received yet another rod update. All replacement rods for all series use this rod (0x240).

The STI rod is the same as the JDM STI rods. (However note that not all older JDM STI blocks uses this revision).

12100AA080 MY02 WRX
12100AA081 MY02,03,04 WRX [UPDATED]
12100AA190 MY03,04 WRX [UPDATED]
12100AA180 MY04,05 STI
12100AA240 MY05 WRX [UPDATED]

JDM Overlap:
x081 WRX rods are same as JDM WRX rods.
x190 WRX rods are same as JDM WRX rods.
x180 STI rods are same as JDM STI rods (all versions)

Cams:

WRX Cams changed in 03,04, and 05. The 03 change was likly small, as they are backwards compatible to 02. The 04 change may be related to the change in MY03 to shimless buckets. All STIs use the same cam.

13037AA101 MY02 WRX
13037AA390 MY03 WRX
13037AA391 MY03,04 WRX [UPDATED]
13037AA490 MY04,05 WRX [UPDATED]
13037AA350 MY04,05 STI

Heads:

All WRX heads have remained unchanged. The STI heads received an update in April 05 (Per Hotrods post below)

11039AB361 MY02,03,04,05 WRX
11039AB650 MY04,05 STI
11039AB910 MY05 STI [updated]

Valvesprings:

As with the heads, all valvesprings remained the same.

13217AA193 MY02,03,04,05 WRX
13217AA251 MY04,05 STI

JDM Overlap:
x193 valvesprings are the same as in MY01 and 02 JDM WRX.
x251 valvesprings are the same as in MY03,04,05 JDM WRX.
NOTE: No US cars use the JDM STI valvesprings.

Needless to say, it took many hours to compile all of this data, especially the JDM stuff since the software is in Japanese!

Cheers, and here is to datasharing on Nasioc!

Jeff Sponaugle
PDXTuning.com
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Last edited by PDXTuning; 08-10-2005 at 01:01 PM.
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Old 08-09-2005, 02:47 PM   #2
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Simply Awesome. Thank you so much for your work in cataloging this information!
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Old 08-09-2005, 02:54 PM   #3
djerickd
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WOW! talk about data
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Old 08-09-2005, 03:08 PM   #4
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And people think I've got OCD Good Job Jeff.
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Old 08-09-2005, 04:52 PM   #5
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Quote:
Originally Posted by chrisarella
And people think I've got OCD Good Job Jeff.
Yea, I've been called that before. Once I get the 06 info, it will be interesting to see what has changed or been carried over from the JDM market.

It is interesting to see that the South Africa and Australian market WRX/STI get a fwe different parts from the UK market. Crazy stuff.

Jeff
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Old 08-09-2005, 05:29 PM   #6
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Good grief

Thanks man!
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Old 08-09-2005, 06:12 PM   #7
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Awesome! You rock, this should be sticky'd here and on 2.0 forum
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Old 08-09-2005, 09:51 PM   #8
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Jeff:

Great information! Thanks for going to all the trouble to compile this and even more so for shareing it!

I just so happens that today I was down at a dealer checking on prices for some parts and he gave me some part numbers for 2.5 STi heads that don't match the numbers you have listed.

He gave 2 different numbers for each of the right and left side head (bare castings)
11039AB650 (right hand head Jan 2004 -April 2005)
11039AB910 (right hand head April 2005 to date)

11063AB120 (left hand head Jan 2004 - Mar 2005)
11063AB330 (left hand head April 2005 - to date

Are the head numbers you list for a pair of heads ?

Larry
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Old 08-10-2005, 08:42 AM   #9
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sweet!

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Old 08-10-2005, 12:47 PM   #10
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Quote:
Originally Posted by sponaugle
WRX rods received an update across all of the models sometime on 03. MY01 and MY02 STIs used the same rods. MY03 STIs received a new rod. All STI model years were updated to a newer rod (x180), which is the same rod used in the US STI.

The cost of x180 rods just went from "can't give them away" to "$$$"
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Old 08-10-2005, 12:58 PM   #11
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Quote:
Originally Posted by hotrod
Jeff:

Great information! Thanks for going to all the trouble to compile this and even more so for shareing it!

I just so happens that today I was down at a dealer checking on prices for some parts and he gave me some part numbers for 2.5 STi heads that don't match the numbers you have listed.

He gave 2 different numbers for each of the right and left side head (bare castings)
11039AB650 (right hand head Jan 2004 -April 2005)
11039AB910 (right hand head April 2005 to date)

11063AB120 (left hand head Jan 2004 - Mar 2005)
11063AB330 (left hand head April 2005 - to date

Are the head numbers you list for a pair of heads ?

Larry
Nope.. Misquote on my part, as my catalog also lists the AB650, not AB640 for the US STI RH head. My catalog does not have the AB910 part number, as I suspect the dealer has the latest update which included the 06 part numbers. I'll add that head Pn to the original sheet as well! Thanks!

If anyone else gets any other 06 part #s, let me know!

Cheers!

Jeff
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Old 08-10-2005, 12:59 PM   #12
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Quote:
Originally Posted by n2xlr8n
The cost of x180 rods just went from "can't give them away" to "$$$"
Yes, although I thought everyone knew that the US STI rods were the same as the JDM ones (including the Spec C). They are pretty good rods!

Jeff
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Old 08-10-2005, 01:37 PM   #13
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Quote:
Originally Posted by PDXTuning
Yes, although I thought everyone knew that the US STI rods were the same as the JDM ones (including the Spec C). They are pretty good rods!

Jeff

Some did.

http://forums.nasioc.com/forums/show...ight=EJ257+rod

Start at post #17

Ebeck owes me $20 worth of pennies.
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Old 08-10-2005, 02:58 PM   #14
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Thanks Jeff. I have one question. So the USDM STi MY04 and MY05 have exact same part number pistons. So this puts an end to the MY05s have better/stronger/different pistons? Correct? Thanks.
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Old 08-10-2005, 05:31 PM   #15
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Quote:
Originally Posted by keyser_soze
Thanks Jeff. I have one question. So the USDM STi MY04 and MY05 have exact same part number pistons. So this puts an end to the MY05s have better/stronger/different pistons? Correct? Thanks.
Well, that is a good question. Subaru will usually rev the part number if there is a change. However, I have seen three different varieties of pistons come out of EJ257 blocks. The very first production blocks (from EJ257s purchased from Japan before the US STI came out) had FULLY coated pistons. I have a set of these pistons in a block I purchased right when the STI came out. The second set of pistons have no side skirt coating of any kind, and these have occurred in some of the early 04s. The third set, from a newer 05, had the coated sideskirts. All three of these parts have the same part number, and are assumed to be compatible.

So.. It seems that small changes like this are allowed within the constraints of the part number, perhaps because it is not considered performance critical.

Jeff
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Old 08-13-2005, 04:11 AM   #16
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question...

shouldnt the JDM V7 piston # be different than the JDM V8/V9 piston #? I thought they went from forged to hypercast?
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Old 09-01-2005, 04:35 PM   #17
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Jeff, care to comment on whether JDM crankshafts are "double drilled", and more specifically if it aids in high RPM oiling of the rod bearings?
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Old 09-01-2005, 04:37 PM   #18
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Quote:
Originally Posted by bboy
Jeff, care to comment on whether JDM crankshafts are "double drilled", and more specifically if it aids in high RPM oiling of the rod bearings?
I think the spec c's have dual oil galleries in the crank..
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Old 09-01-2005, 05:41 PM   #19
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What a great reference to have! Thanks Jeff!
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Old 12-11-2005, 04:20 PM   #20
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Question Permission to post this up on Scoobypedia.co.uk?

Jeff,

What a great reference!

Seems a shame for this technical information to be locked away in this thread. Would I have your permission to post this up on my Scoobypedia.co.uk wiki-based knowledge base for many others to benefit? Perhaps under the Specifications Page would be good.

Feel free to post yourself if you're interested, just let me know if you need help or prefer I did it. Don't suppose you still have the original spreadsheet? may be convert to PDF.

Regards,
-Steve.
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Old 12-13-2005, 11:54 AM   #21
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Where's all the data for Old School JDM cars?

Version 1-6 STi, WRX, RA, Type R, etc.?
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Old 12-13-2005, 01:23 PM   #22
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Sticky!!!
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Old 12-13-2005, 01:33 PM   #23
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Quote:
Originally Posted by crispyduck
Jeff,

What a great reference!

Seems a shame for this technical information to be locked away in this thread. Would I have your permission to post this up on my Scoobypedia.co.uk wiki-based knowledge base for many others to benefit? Perhaps under the Specifications Page would be good.

Feel free to post yourself if you're interested, just let me know if you need help or prefer I did it. Don't suppose you still have the original spreadsheet? may be convert to PDF.

Regards,
-Steve.
No problem Steve.. I ahve a newer format that I'll send you that is a bit better..

Also, I just got all of the JDM and US 06 Data, so I'll fish all that out and get 06 charts up as well.

As for the older JDM cars, I have all the data available, I just need to compile it together! As you can imagine, it is pretty time consuming, especially with the JDM software in Japanese!

Cheers,

jeff
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Old 12-16-2005, 03:46 PM   #24
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so i can find this later
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Old 12-17-2005, 03:29 AM   #25
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Again everyone benefits from Jeffs labor. Thanks.
Looking forward for the early cars
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