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Old 01-31-2003, 04:32 PM
kiaserknife's Avatar
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Post king bearings

does anyone here use king bearings?

the reason I ask is that I just installed a

set in a 400sb I built (everything is new)and

it seem that my oil pressure drops faster and

rests lower than in other engines I have built.

any thoughts as to why this is happening will

be appreciated.

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Old 01-31-2003, 04:44 PM
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they are good bearings , did you check your clearances before assembly?
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Old 01-31-2003, 04:46 PM
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been using king bearings for years, they have a thicker actual bearing surface and tolerate foreign objects a bit better if you have an engine problem,but i have seen babbit flaking on high horse high heat apps, not serious but none the less there, oil pressure problems usually stem from pump or cam bearing problems, what else is different from before? 400's run hotter in general, could this be the problem?
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Old 01-31-2003, 05:03 PM
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Yeah I check the tolerances and then checked em

again, everything is where it should be.

A friend told me that the grooves are wider in

the mains and that could account for the pressure

dropping quicker. pressure rests at around 12-15

psi @ 900 rpm....is this normal.
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Old 01-31-2003, 05:12 PM
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Okay, where should it be? Are you sure? What were the measurements on the mains and rods? Either your clearances are a bit loose across the board, or you have one bearing with a problem.

Chris
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Old 01-31-2003, 05:24 PM
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Hey turbo...im not asking for your critisizem

just need a little info is all.....as for the

"loose" you are refering to...no its not loose

across the board..nor do I have a bad bearing.

I know because I have checked them...no burning

flakeing, galling or gouging....
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Old 01-31-2003, 07:38 PM
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[quote]Originally posted by kiaserknife:
<strong>Hey turbo...im not asking for your critisizem

just need a little info is all.....as for the

"loose" you are refering to...no its not loose

across the board..nor do I have a bad bearing.

I know because I have checked them...no burning

flakeing, galling or gouging....</strong><hr></blockquote>

Okay, settle down here. I am not being critical. My point is if you have to ask whether a bearing brand will hold less oil pressure it is a possibility that you are not sure of the correct bearing clearances. If you have as little as .0005 over on all the mains or rods, oil pressure may be lowered. All I was asking is if you have checked them, what are the clearances? There do not have to be any visible signs of damage for a bearing to be out of clearance. What did the plastigauge show on your mains and rods? Have you torn it back down since it was built? If not, something could have happened on startup. If all of this is good, check your pump.

Chris
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Old 01-31-2003, 09:37 PM
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King has an extra .001 clearance than Clevite.

They are designed. for race applications that need extra clearance.

How did you check the clearance? Mic the crank, set up a dial bore gage with the mic?

[ January 31, 2003: Message edited by: Infomaniac ]</p>
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Old 02-01-2003, 05:18 AM
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[quote]Originally posted by Infomaniac:
<strong>King has an extra .001 clearance than Clevite.

They are designed. for race applications that need extra clearance.

How did you check the clearance? Mic the crank, set up a dial bore gage with the mic?

[ January 31, 2003: Message edited by: Infomaniac ]</strong><hr></blockquote>


Well, if that is true then there went all your oil pressure. I am curious to see your response knife. This could very well be the cuplrit.

Chris
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Old 02-01-2003, 01:55 PM
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I mic'd the crank prior to assembly, I didnt know of the extra clearence built into the bearing. I only know from what i was told about the channels being bigger to allow for more oil flow.
I'm gonna pick up some plastigauge check em and if everything is ok.....get a better oil pump...
asy suggestions?
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Old 09-04-2007, 08:20 PM
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king bearings

i bought the summit racing brand bearings and they just happened to be the lower end stock replacement king bearings. my clearances with plasigage were at .0025-.003 on everything and my oil pressure with 5w30 conventional mobil1 was around 12-15 lbs at a 750 rpm idle. i have a stock volume pump. when i give it gas, my oil pressure jumped to 55-58 lbs at around 2200-2500 rpm. i was always told that you only need 10 lbs per 1000 rpm, so 10-12lbs at idle would be fine. oh yeah, by the way, king bearings are from israel. some of the most precisely manufactured components on guns come from israel. i was sceptical also, but now im sold on them.
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