Re: Need more clearance main bearings
[Re: varunner]
#2886014
02/09/21 08:15 PM
02/09/21 08:15 PM
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Joined: Oct 2005
Posts: 272 Anchorage, Alaska
metallicareload
enthusiast
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enthusiast
Joined: Oct 2005
Posts: 272
Anchorage, Alaska
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I've heard that King Engine bearings run on the thinner side, but I don't have first hand experience with em
440, 4-Speed, 3.54 1968, when Dinosaurs ruled the Earth
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Re: Need more clearance main bearings
[Re: varunner]
#2886063
02/09/21 09:41 PM
02/09/21 09:41 PM
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Joined: Aug 2009
Posts: 2,050 Mooresburg, Tn
'72CudaRacer
top fuel
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top fuel
Joined: Aug 2009
Posts: 2,050
Mooresburg, Tn
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Speed Pro 119M will give you about .001" more clearance than a Clevite. They are a very good bearing choice for high performance engines. And good luck finding King bearings (for BB Mopar) in stock right now.
Brian
Last edited by '72CudaRacer; 02/09/21 09:42 PM.
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Re: Need more clearance main bearings
[Re: '72CudaRacer]
#2886183
02/10/21 08:24 AM
02/10/21 08:24 AM
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Joined: Feb 2003
Posts: 2,563 S.E. Michigan
cl440
master
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master
Joined: Feb 2003
Posts: 2,563
S.E. Michigan
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Speed Pro 119M will give you about .001" more clearance than a Clevite. They are a very good bearing choice for high performance engines. And good luck finding King bearings (for BB Mopar) in stock right now.
Brian The 119M is for RB mains. The OP has a Low Deck.
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Re: Need more clearance main bearings
[Re: cl440]
#2886280
02/10/21 11:54 AM
02/10/21 11:54 AM
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Joined: Jan 2003
Posts: 13,380 Marion, South Carolina [><]
an8sec70cuda
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 13,380
Marion, South Carolina [><]
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FWIW...every set of standard size King main bearings I've tried were tighter than the equivalent Speed Pro or Clevite.
CHIP '70 hemicuda, 575" Hemi, 727, Dana 60 '69 road runner, 440-6, 18 spline 4 speed, Dana 60 '71 Demon, 340, low gear 904, 8.75 '73 Chrysler New Yorker, 440, 727, 8.75 '90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt '06 GMC 2500HD LBZ Duramax
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Re: Need more clearance main bearings
[Re: an8sec70cuda]
#2886296
02/10/21 12:20 PM
02/10/21 12:20 PM
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Joined: Jun 2006
Posts: 662 Virginia
varunner
OP
mopar
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OP
mopar
Joined: Jun 2006
Posts: 662
Virginia
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My crank is -.010 I found some -010 speed pro bearings(4094M10). I'll see what King has to offer and update. *
Last edited by varunner; 02/10/21 12:21 PM.
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Re: Need more clearance main bearings
[Re: cl440]
#2886652
02/11/21 08:54 AM
02/11/21 08:54 AM
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Joined: Aug 2009
Posts: 2,050 Mooresburg, Tn
'72CudaRacer
top fuel
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top fuel
Joined: Aug 2009
Posts: 2,050
Mooresburg, Tn
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Speed Pro 119M will give you about .001" more clearance than a Clevite. They are a very good bearing choice for high performance engines. And good luck finding King bearings (for BB Mopar) in stock right now.
Brian The 119M is for RB mains. The OP has a Low Deck. Yep, I missed that little detail. Sorry. Brian
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Re: Need more clearance main bearings
[Re: Twostick]
#2886858
02/11/21 06:29 PM
02/11/21 06:29 PM
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Joined: Jun 2006
Posts: 662 Virginia
varunner
OP
mopar
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OP
mopar
Joined: Jun 2006
Posts: 662
Virginia
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I wouldn't do that. Most people would not remove anymore than a tenth or so I think. Bearing manufacturers recommend to not polish crank journals, but I'm sure it's done all the time. I actually was at a shop recently to have some block work done, and brought my crank to polish. I doubt he removed enough to even measure. He used a cork belt.
I got some more bearing specs on thickness:
clevite fully grooved MS876P10 .1001 -.1006 sealed power fully grooved 4094M10 .1001-.1005 King half groove MB555HP010 .1001-.1005
So if the bearings are in spec, you'll get .0004 - .0005 variance.
Probably going to order some sealed power and see what I get.
Last edited by varunner; 02/11/21 06:30 PM.
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Re: Need more clearance main bearings
[Re: varunner]
#2887031
02/12/21 02:42 AM
02/12/21 02:42 AM
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Joined: Aug 2003
Posts: 43,252 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,252
Bend,OR USA
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Have you ever use red Scotchbrite pad and cleaning solvent on new bearings to increase the clearances? I know several SO CA really good Mopar drag race engine builders that do use it to get the clearances they wanted back in the day, the trick is to not get real aggressive on using the pad, wipe it gently against the bearings shooting for a uniform finish while washing it under steady stream of solvent and then clean it thoroughly in hot soapy water and rinse it in hot clean water and blow dry it well before installing back into the bearing bores for measuring I shoot for .0030+ on the main bearing clearances with both B and RB cranks and .0022+ on BB Chevy size rod journals and .0025+ on Mopar rod journals with 5W20Wt and 10W30 Wt. petroleum based oil, not synthetic oil With thicker oil add more clearances
Last edited by Cab_Burge; 02/12/21 02:51 AM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Need more clearance main bearings
[Re: dvw]
#2887087
02/12/21 09:48 AM
02/12/21 09:48 AM
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Joined: Jun 2006
Posts: 662 Virginia
varunner
OP
mopar
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OP
mopar
Joined: Jun 2006
Posts: 662
Virginia
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Cab, I definitely thought about that. I think I will try it on a used bearing.
Rods are at .003 mains .0023 average, varies a few tenths.
Last edited by varunner; 02/12/21 09:49 AM.
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