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Old 12-19-2012, 03:10 PM   #76
carnz-pj-410
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Quote:
Originally Posted by aboothman View Post
So the 400 is the non-nitraded non-heat treated crank?
12200AA370 is the non treated crank
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Old 12-19-2012, 03:11 PM   #77
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Quote:
Originally Posted by FlatironsTuning.com View Post
FWIW, all of the Subaru shortblocks that have been built since 2009 all come with the surface hardened cranks. And that is for both the early AC030 and late AC050 blocks.

As far as the non-treated cranks, they are still readily available as mentioned above. the 400's supersede to the 370's.
400 supercedes to 12200AA330, not AA370
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Old 12-19-2012, 04:12 PM   #78
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Ok so no change on the non-treated crank. Thanks!
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Old 12-19-2012, 04:35 PM   #79
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Quote:
Originally Posted by carnz-pj-410 View Post
400 supercedes to 12200AA330, not AA370
Yes, I was editing my post as you were posting most likely:

Quote:
Originally Posted by FlatironsTuning.com View Post
As far as the non-treated cranks, they are still readily available as mentioned above. [EDIT] Sorry, the 400 was the first iteration of the nitride treated crank, that went to the 430, which went to the 330. The same 330 which is now heat treated instead of nitride treated. the 370 has always been available, and it not surface treated at all.[/edit]
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Old 12-19-2012, 04:44 PM   #80
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Quote:
Originally Posted by carnz-pj-410 View Post
12200AA370 is the non treated crank
my typo of 400 on the 3MI acct didn't help either

I'll have to change it when I log back in. Meant 370...should still be used in the NA 2.5.
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Old 12-19-2012, 05:13 PM   #81
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Originally Posted by Homemade WRX View Post
my typo of 400 on the 3MI acct didn't help either

I'll have to change it when I log back in. Meant 370...should still be used in the NA 2.5.
Quote:
Originally Posted by FlatironsTuning.com View Post
Yes, I was editing my post as you were posting most likely:
lol, sorry guys, just trying to keep the information straight!
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Old 12-20-2012, 10:56 AM   #82
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No worries, I corrected my post.

-Micah
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Old 12-22-2012, 12:28 AM   #83
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So I was at my local dealer's parts desk, and they told me that the 370 crank replaced the 330 and that they could not order me the 330. He said if he ordered the 330 the 370 would come in.

I'm not too concerned because there are plenty of vendors to get the 330 from, but it's frustrating since I've also had issues with this dealer in the past. Although, this may not be their fault.
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Old 12-22-2012, 01:02 AM   #84
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Apparently there was a temporary mistake with Subaru and their part supersessions, but everything is corrected now. If you order a 12200AA330 that is what you will receive, and if you order a 12200AA370 you will receive that.

Both cranks are in good supply at the Subaru RDCs
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Old 12-27-2012, 02:31 PM   #85
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I've just been informed that the 330 part number has been superseded by the 370 part number.

What the heck is going on?!
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Old 12-27-2012, 02:41 PM   #86
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I just checked on Subaru RPM and 12200AA330 does not supercede, Immediate availability with 300 in the warehouses.

Someones messing with us lol
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Old 12-27-2012, 04:22 PM   #87
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If the individual dealer has not deleted the incorrect supercession from their system then it will still try to order the 370. You can inform them that the supercession is no longer valid in Subarunet, they delete it on their side and then they can order the 330.
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Old 12-27-2012, 09:33 PM   #88
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Yeah, I tried to mention that to my dealer, but he said he could only order the 370 and I didn't want to push the issue. I'll probably call in about it, but there is certainly some confusion. My parts guy's apparent lack of concern doesn't help.

Why do they even sell the non-treated crank? Is it sold in other 2.5L Subaru engines?
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Old 12-28-2012, 01:11 AM   #89
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Thanks when I take my business to a place that wants it. Subaruparts.com (Tacoma Subaru) and Annapolis are a couple that come to mind!! My local dealership is not bad either but charge full price
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Old 12-31-2012, 10:33 AM   #90
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Quote:
Originally Posted by Annapolis Subaru View Post
If the individual dealer has not deleted the incorrect supercession from their system then it will still try to order the 370. You can inform them that the supercession is no longer valid in Subarunet, they delete it on their side and then they can order the 330.
I'll bring it up with them. When ordering batches of cranks, I want to be sure I can get what I want!!
Thanks Jackie!!

-Micah
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Old 01-04-2013, 02:10 PM   #91
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I still couldn't convince my local dealers to update their listings, but thanks to the guys at FlatIrons tuning I have a 330 crank on the way. Even with shipping it was cheaper than my dealer's price w/ a 10% discount, so I'm happy.
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Old 01-28-2013, 08:20 AM   #92
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Thanks again for the info guys! Crank on order with stuff to accompany
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Old 02-11-2013, 12:51 PM   #93
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Quote:
Originally Posted by Annapolis Subaru View Post
If the individual dealer has not deleted the incorrect supercession from their system then it will still try to order the 370. You can inform them that the supercession is no longer valid in Subarunet, they delete it on their side and then they can order the 330.
What's the current price on a nitrided heat treated sti crankshaft?
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Old 02-11-2013, 12:59 PM   #94
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300-350
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Old 02-11-2013, 02:57 PM   #95
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From what I am understanding, you can no longer order them nitrided, only heat treated. Subaru's suggested list price on #12200AA330 is $381.56 and any dealer who supports this forum should sell it for a bit less, in the $300-$350 range as mentioned above.
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Old 02-21-2013, 02:04 PM   #96
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Anyone know what material the stock crank is made of? I would imagine someone here does with all the treatments being done to them. What about the block and cylinder liners? I would guess the block is a 3xx but idk. I've heard the liners are gray iron but again don't know for sure.
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Old 03-13-2013, 08:40 PM   #97
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I would like to bump this and ask if anyone has pushed a heat treated crank to 600+ HP levels. I am comfortable with the nitrided but very unsure of the heat treated...
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Old 03-14-2013, 07:15 AM   #98
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^ I can't help you there. If I were to throw a blind guess out there I'd say the difference in the induction hardened and nitrided cranks is marginal at the journals. The nitriding should be more consistent across the whole part vs the induction process that is field depandant and may even be done specifically to target the journals.

If anyone cares, I got a heat treated version and sent it out for nitriding. This gives me a crank with surface hardness depth over double the OEM nitriding process and an increase of 20 on the C scale. I don't forsee the car exceeding 500whp in the near future and I really don't like to speculate on power capabilities as some may take it as gospel. My primary purpose was to extend the life of the crank (journals) over multiple engine rebuilds. This of course is going to be in concert with modifications made to the block's oiling systems and pump too, just to add to the speculation factor
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Old 03-14-2013, 07:13 PM   #99
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I know that my gas nitrided cranks aren't far from the market. Finally have dialed in the 'recipe'. My main drive was in keeping the crank from being a wear item as many of my customers are motorsport oriented and rebuilds are a real thing and doing so without losing core strength.

I haven't done this with the newer heat treated cranks though. I'm still using the older, higher manganese cranks.

-Micah
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Old 03-14-2013, 07:17 PM   #100
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Quote:
Originally Posted by KillerBMotorsport View Post
^ I can't help you there. If I were to throw a blind guess out there I'd say the difference in the induction hardened and nitrided cranks is marginal at the journals. The nitriding should be more consistent across the whole part vs the induction process that is field depandant and may even be done specifically to target the journals.
Now I'ma cognitive neuroscientist, but isn't the theory of crystalline structers more partial to a proper heat treatment being more uniform, and therefore the theoretically safer way of expecting toughness at the journals? Isn't nitriding susceptable to materials variation and process control?
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