Posted By: VITC_GTX
.001" undersize main bearing for 383. Can't find a set! - 11/18/12 01:30 AM
My '71 383 came from the factory with .001" undersized mains. I can't seem to find any .001" under main bearings, anyone make them????
.001" undersize main bearing for 383. Can't find a set!
Posted By: 340SHORTY
Re: .001" undersize main bearing for 383. Can't find a set! - 11/18/12 01:46 AM
Put standards on it. The engine wont know the difference..
Posted By: AndyF
Re: .001" undersize main bearing for 383. Can't find a set! - 11/18/12 02:00 AM
That is a common problem with the low deck blocks. You can try some different brands to see if you get lucky. Or have the crank ground and start over.
Posted By: VITC_GTX
Re: .001" undersize main bearing for 383. Can't find a set! - 11/18/12 02:07 AM
Quote:
That is a common problem with the low deck blocks. You can try some different brands to see if you get lucky. Or have the crank ground and start over.
What is the largest clearance I can get away with? This will be a low horse build (~335 hp) in a daily driver.
Posted By: lewtot184
Re: .001" undersize main bearing for 383. Can't find a set! - 11/18/12 03:22 AM
i don't think the .001" under bearings have been made in decades. a standard bearing would probably yeild a .0035" clearance. too loose for a driver. i'd consider going .010" under.
Posted By: RapidRobert
Re: .001" undersize main bearing for 383. Can't find a set! - 11/18/12 03:43 AM
Mock it up with a std set & measure what you get (& post it). A high vol pump MAY help if it's a bit excessive
Posted By: AndyF
Re: .001" undersize main bearing for 383. Can't find a set! - 11/18/12 06:43 AM
I might have some NOS ones. I bought a bunch of factory big block bearings from a dealership that was going out of business a few years ago.
Posted By: CSK
Re: .001" undersize main bearing for 383. Can't find a set! - 11/18/12 07:27 AM
ck the clearance & if to loose send the bearings out to get coated
http://speedtalk.com/
http://speedtalk.com/
Posted By: sthemi
Re: .001" undersize main bearing for 383. Can't find a set! - 11/18/12 07:29 AM
try calling Frank Mitchell, he still has tons of Mopar engine parts, he shipped me an NOS piston for my Hemi this Spring.. 
Posted By: Yellow Fever
Re: .001" undersize main bearing for 383. Can't find a set! - 11/18/12 11:10 AM
Posted By: Yellow Fever
Re: .001" undersize main bearing for 383. Can't find a set! - 11/18/12 11:19 AM
Hmmm,
Main and rod bearing sizes std, .001, .002,
.010, .020, .040, .060
http://www.kanter.com/p24-mon.html
Main and rod bearing sizes std, .001, .002,
.010, .020, .040, .060
http://www.kanter.com/p24-mon.html
Posted By: forphorty
Re: .001" undersize main bearing for 383. Can't find a set! - 11/18/12 09:31 PM
Quote:I had over four thou clearance on the mains on a street 440 when it was put together over twenty years ago. Has had a lot of street miles along with some passes at the track. No problems.Has 60 psi oil pressure at 1000 rpm and 80 going down the road with a Milodon hi vol pump.Quote:
That is a common problem with the low deck blocks. You can try some different brands to see if you get lucky. Or have the crank ground and start over.
What is the largest clearance I can get away with? This will be a low horse build (~335 hp) in a daily driver.
Posted By: DaytonaTurbo
Re: .001" undersize main bearing for 383. Can't find a set! - 11/19/12 12:24 AM
Quote:Quote:I had over four thou clearance on the mains on a street 440 when it was put together over twenty years ago. Has had a lot of street miles along with some passes at the track. No problems.Has 60 psi oil pressure at 1000 rpm and 80 going down the road with a Milodon hi vol pump.Quote:
That is a common problem with the low deck blocks. You can try some different brands to see if you get lucky. Or have the crank ground and start over.
What is the largest clearance I can get away with? This will be a low horse build (~335 hp) in a daily driver.
Sure, but if he has it apart now, why not just do it right and either cut the crank .010 or locate the .001 bearings? I'd spend the couple extra dollars now so I didn't even have to worry about it later.
Posted By: JohnRR
Re: .001" undersize main bearing for 383. Can't find a set! - 11/19/12 06:44 AM
Quote:
Hmmm,
Main and rod bearing sizes std, .001, .002,
.010, .020, .040, .060
http://www.kanter.com/p24-mon.html
That's a generic listing , there isn't any guarantee they have a .001 oversize set.
Posted By: Joesixpack
Re: .001" undersize main bearing for 383. Can't find a set! - 11/20/12 03:36 AM
Posted By: dogdays
Re: .001" undersize main bearing for 383. Can't find a set! - 11/20/12 07:12 PM
Bill Cowger, how goes the parts business? Whaddya have for putting bigblock in a sweptline? How about replacement insulator pads for the stock 318?
R.
R.
Posted By: JohnRR
Re: .001" undersize main bearing for 383. Can't find a set! - 11/20/12 08:11 PM
Quote:
.002
http://www.ebay.com/itm/FED-MOGUL-MS876P...=p2047675.l2557
That is one old set of main bearings ... nice find
Posted By: Joesixpack
Re: .001" undersize main bearing for 383. Can't find a set! - 11/21/12 02:40 AM
Parts business is great....moved into 1300 sq foot warehouse,have branched into antique ignition&electrical parts for all cars*trucks,tractors,1920-1975. Worldwide sales. Sorry dont have anything for BB truck conversion. Lower back problems have made me switch to lightweight parts.....check moparts truck parts section....