Extra clearance 440 Main Bearings

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simon1mopar

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Can anyone advise a manufacturer and part number for a standard 440 crank .001" extra clearance main bearing. I can't find one , my current clearance is only.0015" and I want .0025"
 
Can anyone advise a manufacturer and part number for a standard 440 crank .001" extra clearance main bearing. I can't find one , my current clearance is only.0015" and I want .0025"
you can get them from Summit racing, I did.
 
You're going for a race clearance? You know, .0025 is the max, the spec is .0005" - .0015" from the FSM.
 
Don't go less than .0025. Clevite has them for sure.
 
Looks like NLA from king or clevite, polish the crank down .001"
 
I don't see why you would want 20 years of wear already on the bearings. Just so one can(needs to) run 20W50 oil?
 
Go ahead and run .001 clearance and 0W20 oil and when you spin a main and waste the block I'll still be running mine 7000 rpm with straight 40W
 
Go ahead and run .001 clearance and 0W20 oil and when you spin a main and waste the block I'll still be running mine 7000 rpm with straight 40W
agreed, street and race are totally different requirements, I'm running 7200rpm and 14-1 compression, like you say you'll definitely spin a bearing with standard clearance. These old girls aren't manufactured to the tolerance of the new gen engines that will live with tighter clearances
 
Looks like NLA from king or clevite, polish the crank down .001"
Yeah thanks Brian, just musn't be much call for them and they've stopped manufacturing. My old crank was 10under and polished so not a problem but it's now a two piece crank and not working so well!
 
Yeah thanks, going for a race spec
street hemi`s came out of the factory w/ .003 straight across the board, that tell u anything ? I have about .0025 on my 505, and would rather had a hair more. I don`t think we even have decent crank man around here anymore, so what are u to do except added clearance bearings ?
 
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