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Old 11-13-2012, 12:10 AM   #1
TUNERwRX
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Default King Bearing Coming out with Redesigned Bearings

King Bearings will be introducing a newly redesigned and custom engineered Subaru EJ25 XPG race bearings at PRI and IMIS shows next month. King reps will be releasing the press release this week on the new design that will address oil issues and dreaded spun bearings that many Subaru engines have encountered over the years. Should be interesting!
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Old 11-13-2012, 12:47 AM   #2
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awesome!
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Old 11-13-2012, 01:18 AM   #3
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We're going to IMIS so I'll be sure to add it to my list to check out.
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Old 11-13-2012, 09:14 AM   #4
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Nice! In for future updates...
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Old 11-13-2012, 10:06 AM   #5
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This is perfect timing since im putting together another motor. So....whos going to be first?
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Old 11-13-2012, 12:42 PM   #6
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They are already out.



http://forums.nasioc.com/forums/show...2305338&page=4

Changes include full 360 circumference grooves and larger oval oil holes.
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Old 11-13-2012, 12:43 PM   #7
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oh and also new packaging:
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Old 11-15-2012, 12:24 PM   #8
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360 degree groove? Really? Why not a 180? The mains arent gonna like that one bit.
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Old 11-15-2012, 01:37 PM   #9
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So here is a question, from what the article linked in T.S.'s thread said a 360 is nice for the rod bearings but not so much for the mains, would it be adviseable for a first time builder that doesn't really want to do it again in 5k miles to use the king's for rods and stay with either the older design or something like acl/cosworth/clevite for the mains?
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Old 11-15-2012, 01:54 PM   #10
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OEM and other mains are around 280-300* grooved. The only spot not grooved on them are at the parting line between the shells.
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Old 11-15-2012, 05:31 PM   #11
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Quote:
Originally Posted by Paidfor View Post
360 degree groove? Really? Why not a 180? The mains arent gonna like that one bit.
Probably because the engineers who developed these decided it was necessary. But what do they know, right?
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Old 11-16-2012, 09:03 AM   #12
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^^^^^Im sure.......but.......what clearance did they "engineer" these 360s to "perform" ? Is the question i guess. Do we still use the general factory tight mains and looser on the rod side? Of is it vice versa now? Im not im the market for a new set of engine bearings by any means (thank God) , but if i were......im not sure over oiling the rods is nessesary as well as sacrificing a good footprint for the mains. Id like to see definitive proof of why this companys new bearing design is better or even safe for that matter. Just sayin....theres a reason they went to this design and im sure its a good one id just like to hear it is all. It would be awsome to have a new design that allows more abuse thats for sure.
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Old 11-16-2012, 11:52 AM   #13
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Here are two cranks, one is an STi 257, one is a revised 205. Cylinder #1 at BDC (oil galley would be in the same position at TDC), and you can see where the oil galley of the main is positioned. does this make sense to you?

257



205






EDIT: sorry it's cylinder #1, not 2

Last edited by FuJi K; 11-16-2012 at 01:32 PM.
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Old 11-16-2012, 01:23 PM   #14
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Very nice observation
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Old 11-16-2012, 02:35 PM   #15
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I have modified the main bearings like those, in all my build engines for years... Too bad someone has found out.
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Old 11-16-2012, 02:43 PM   #16
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Quote:
Originally Posted by EMS View Post
I have modified the main bearings like those, in all my build engines for years... Too bad someone has found out.

So you have always ran 360 groove ? You should share your experience with us.
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Old 11-16-2012, 02:54 PM   #17
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Quite a few other oiling "secrets" are in them too... I won't tell, as I sell them to my customers and it took me years to develop it.
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Old 11-16-2012, 04:48 PM   #18
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Quote:
Originally Posted by EMS
Quite a few other oiling "secrets" are in them too... I won't tell, as I sell them to my customers and it took me years to develop it.
I see you got secrets too!

I just post pictures, people can determine what they want to do.
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Old 11-16-2012, 07:28 PM   #19
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Three cheers for Fuji.....
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Old 12-01-2012, 09:09 AM   #20
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Hi , I see some Questions about XPG bearings
I am the "inventor" of the XPG and this is the story about it:

We made research and found that Most of Bearing failure in Subaru EJ engines appear on CR #2 and #3.
We received few failed bearings for inspection and found similar symptoms of Oil starvation.
The question is why only CR#2 ,#3 and not CR #1 CR#4
Well, CR#1 get oil from MB#1, CR#4 get from MB#5, CR #2,#3 both get from MB #3
My conclusion was :the ability of single main (#3) to feed oil for 2 CR is limited

therefore, Oil In Feed from Block into MB#3
and
Oil Out Feed from MB#3 into CR#2,3 must improved.

In feed (to MB#3) can improved by adding more oil holes or changing oil to Slot
Out feed (to CR #2,3) can improved by changing oil grove to be folly 360 instead of partially 250 degrees.
explanation :In 250 the oil delivery from MB to CR are turned on-off-on-off while crank rotate ~66% on 33% off
In 360 degree it is 100% on

Oil Groove could not modify to be 360 without changing the inside geometry of the Locating Lug.

The oil will leak from oil Groove out trough the inside punched area of the Locating lug

So this is all about it

confused??
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Old 12-01-2012, 09:24 AM   #21
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is this a joke gideon?
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Old 12-01-2012, 09:27 AM   #22
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so why 360 degrees on MB#1 and 5 then?
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Old 12-01-2012, 09:32 AM   #23
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1)NO IT IS NOT A JOKE
2) The issue of 360 is relevant mainly to #3 which feed double amount while #1 and #5 feed single rod each
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Old 12-01-2012, 09:34 AM   #24
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How about sharing some data that a million dollar corp should have prior to little ol me buying unproven ideas on a $150 bearing set going into $20k engine rebuild?
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Old 12-01-2012, 09:36 AM   #25
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fyi..... i purchased a full set normal and oversized. My normal ones are your redesign (which I never asked for) and the oversized are the previous design. Makes it more difficult to swap bearings to get proper tolerances.

feel a bit cheated to be honest.
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