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Old 03-15-2009, 12:10 PM   #1
Pita84
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Default Crankshaft Question

Ok, let me start by saying i have searched for about an hour now and haven't found anything. If anyone could point me in the right direction to the correct post for information without being a jack about a double post i would appreciate it.

I am wondering if the 08 STI crank will work with an 05 block. The 08 crank is supposedly nitrided where i cant find any information on if the 05 is or not.

Thanks in advance
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Old 03-15-2009, 12:25 PM   #2
WrXtaCy2003
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Yes it will work

DK
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Old 03-15-2009, 12:43 PM   #3
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any difference besides treated?
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Old 03-16-2009, 09:11 PM   #4
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Are the earlier crankshafts treated?
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Old 03-17-2009, 12:24 PM   #5
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curious too, if the new crank is nitrited
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Old 03-18-2009, 12:38 PM   #6
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Just checked and the crank does change part# mid 08 and about $40 cheaper than the earlier 370 part. Is it confirmed that they are indeed nitrided?
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Old 03-25-2009, 02:08 PM   #7
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My order for two of the cranks arrived today! They have a flat black nitride finish and the journals are polished to perfection.
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Old 03-25-2009, 02:35 PM   #8
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and they're $40 cheaper?
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Old 03-25-2009, 02:59 PM   #9
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It's hard for me to believe myself.. My cost is about $25 less than the last 2.5l crank that I bought. Retail is about $40 difference.
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Old 03-25-2009, 03:06 PM   #10
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what's the PN
pics?

so basically it's same as spec c crank, only 79mm?
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Old 03-25-2009, 03:18 PM   #11
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that is the new 400 number?
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Old 03-25-2009, 03:20 PM   #12
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#12200AA400. Beside each other, the look identical outside of the finish. I won't know all the changes till I remove them from my Holy Shrine and send them to the machine shop.
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Old 03-25-2009, 03:21 PM   #13
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when i started the thread there were 5 in stock.. now i shook to much interest.. they are out of stock!!

same thrust?
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Old 03-25-2009, 03:38 PM   #14
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Quote:
Originally Posted by Hyper View Post
so basically it's same as spec c crank, only 79mm?
this does make me wonder about the main journals. Andy, can you snap some pics for us?

I'd order the crank but they seem to be out of stock already...same thing happened when I first posted about the revised EJ205 cranks with the double crossdrilled/altered oil timing main journals
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Old 03-25-2009, 04:29 PM   #15
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I'll get Ben to handle the pics and post for us.
As far as the finish on the crank, it seems darker than the usual nitride finish... almost as though some carbon dioxide was introduced as well in the process. A surface hardness test will tell for sure.
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Old 03-25-2009, 06:59 PM   #16
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when do you think you will have the results on the test?
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Old 03-25-2009, 07:13 PM   #17
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Ill drop one off in the morning and depending on the work-load, hopefully by lunch I should have the results.
There were 40 in the warehouse when I made my order last week and today there was 1 in the New Hampshire depot... Strange..
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Old 03-25-2009, 10:54 PM   #18
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Here are the pictures I took for Andy. Note the numbers on the new cranks (these pics include a used previous crank for comparison)






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Old 03-26-2009, 10:45 AM   #19
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Thanks BEN... Note all the mains are A's and the rods are I's.
Seems that only the top spec cranks are processed.
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Old 03-26-2009, 11:14 AM   #20
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weird there were 5 when i first put the post.. then two days ago none.. they must have gotten stock just in time. Good deal.
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Old 03-26-2009, 05:55 PM   #21
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anything on tests? yesterday there was one.. and i guess i missed the order. someone else got it...............
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Old 03-27-2009, 02:11 PM   #22
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The results are in....
Rockwell C scale
Stock crank 20.... New crank 32
Brinell scale
Stock 220..... New 294-301
Chemical test showed thorough nitriding, and no discoloration after 30 seconds. The stock crank showed instant reaction to chemical.
The dark finish is due to the temp and duration of processing for a deeper hardness which is even more than the Crower race cranks!
The machinist was impressed with the quality... especially for a factory supplied part.
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Old 03-27-2009, 06:53 PM   #23
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re the new rods the same way? i hear forged pistons also? Mine is on a plane from japan as we speak
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Old 03-27-2009, 07:35 PM   #24
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Quote:
Originally Posted by Pita84 View Post
re the new rods the same way? i hear forged pistons also? Mine is on a plane from japan as we speak
I have not had the pleasure of going inside a late 08 yet, so I have no clue about the rods or pistons. It would probably be less expensive to go with aftermarket instead if those components were needed. Can't beat the price of the crank though!
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Old 03-27-2009, 11:53 PM   #25
Pita84
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Quote:
Originally Posted by andya View Post
I have not had the pleasure of going inside a late 08 yet, so I have no clue about the rods or pistons. It would probably be less expensive to go with aftermarket instead if those components were needed. Can't beat the price of the crank though!

I agree, was just wondering.
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