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Old 07-29-2012, 12:32 PM   #1
IWantSubie
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Default Subaru to discontinue nitrated crank?

Not sure if this belongs here but I recently came upon an ebay listing and found this on Celticmotorsports' page...


NOTE: Subaru has discontinued the nitrated crank and will be building blocks with the new induction treated cranks. These were introduced this month and will be coming in the new shortblocks in the near future. As soon as the nitrate crank blocks are gone we will update this listing.

http://www.ebay.com/itm/Subaru-NEW-O...item4cfa83bc5c

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Old 07-29-2012, 01:00 PM   #2
going4speed
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Induction hardening ftw. Better than a coating any day.
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Old 07-29-2012, 04:01 PM   #3
Sideways
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Nitriding isn't a coating, it is a hardening treatment.

And if the salt bath nitriding on any of my gun barrels and parts are of any indication, they aren't gaining anything going to induction heat treating.
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Old 07-29-2012, 04:13 PM   #4
DrD
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Yup - both are case hardening treatments (essentially, you harden the surface of the material, leaving the bulk alone). Nitriding uses nitrogen (can be via gas phase or molten salt) diffused into the surface of the material, whereas induction hardening is a heating/quenching process forming a martensitic layer on the surface. Both work fine (not entirely sure what the max hardness which is achievable with both processes, or the case depth, or if Subaru is even close to the limit on either technique - I would assume not)

Induction hardening is probably less expensive, but I wouldn't think you could do it readily with complex geometry parts
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Old 07-30-2012, 03:40 PM   #5
ChruiSSer
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Since when is eBay a valuable source of information?

I would be curious to see whether this is true or not.
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Old 08-01-2012, 07:09 AM   #6
mpristave
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please provide evidence for this claim.....

Anyone in China can put **** up on ebay.
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Old 08-02-2012, 08:36 AM   #7
IWantSubie
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Considering Celtic Motorsport is a vendor on here, I have given them a PM to reply to this thread, now we wait.
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Old 08-02-2012, 03:37 PM   #8
IWantSubie
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The PM I got back from Celtic Motorsport
"Hello,

The old crank 12200AA430 has been replaced by the new crank 12200AA330. There are no more of the 430 cranks and when Subaru runs out of the blocks they have in stock now they will come with the new crank installed in them from the factory. They are not making the 430 crank anymore and this new crank will be using in all future blocks once the 57 units they have in stock are gone. It is possible that Subaru will get a shipment of the new blocks before these run out but we do not have any information on that and will need to start opening all blocks in the near future to verify which one we have.

Take care,
Brett Moncur
Parts Manager
Celtic Motorsport
714-459-5282
714-670-7358 - fax
www.celticmotorsport.com"
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Old 08-08-2012, 11:09 AM   #9
WRick
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well I just ordered a nitraded crank for a 2.0L version 9 spec C from my local dealer.

Part # was 12200AA390

dirt cheap too !
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Old 08-14-2012, 10:52 AM   #10
Marnix
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The AA330 crank is not new it was also used between 2005 and 2007 on some engines:

BL/BP Legacy EJ253+EJ255 03/2005 – 06/2006
SG Forester EJ253+EJ255 03/2005 – 05/2007

Since last year it's back:

BM/BR Legacy EJ255 02/2011 – now
GR WRX & STI EJ255+EJ257 02/2011 – now

This information is applicable to vehicles for the European markert.
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