need help wth main bearings pls
03-23-2010, 10:19 PM
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Car: 86 iroc
Engine: 383HSR
Transmission: custom 700r
Axle/Gears: moser 9" 3.90
need help wth main bearings pls
i just got my crank back from being polished after my cam wiped out and they told me i needed .001 mains so would that be a .001 under bearing or .001 over.
i would like to use these but im not sure if there correct, any help would be apriciated.
http://www.summitracing.com/parts/FEM-139M1/
i would like to use these but im not sure if there correct, any help would be apriciated.
http://www.summitracing.com/parts/FEM-139M1/
03-23-2010, 11:24 PM
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Car: 82 S10, 83 280ZX, 84 Z28
Engine: 355 smallblocks..na, 2.8 turbo
Transmission: 85:th350, 84:700R4
Axle/Gears: 85:ford9 4.85, 84:stock 3.24
Re: need help wth main bearings pls
those look like the right bearings. just make sure you plastigage them anyway to be 100% sure. if you get .001-.0015 clearance then the stock bearings would have worked.
03-24-2010, 02:55 PM
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Car: 82 Berlinetta/57 Bel Air
Engine: LS1/LQ4
Transmission: 4L60E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Bearing are referred to as "under" because the crank journals become smaller when they are ground/turned. Used to be pretty popular in rebuilds, isn't done so much anymore. If the crank is undersize from wear, the typical approach is to turn the journals to 0.010" under.
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