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.001" oversized main bearings?

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  • .001" oversized main bearings?

    I know they have 'em for the SBC, but what about us 60º V6 guys? I'm sitting @ .003" main bearing clearance across the board, and would like something a little better, without cutting the crank
    3.1L \'88 Camaro - 16G @ 9.5psi
    222/291 @ wheels

    T61 on the way!

  • #2
    I saw a set somewhere . . . absolutely no clue where, i wasnt looking for them so i dont remember. just confirmation that they are out there if you want to bother scouring the internet!

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    • #3
      You want more clearance?

      You are already over the max. Max is 0.0027"
      1993 EXT. CAB, 3.4L V6 TBI, 5spd manual. Sonoma
      1990 4Door, 3.2L V6 TBI, 5spd manual. 4X4. Trooper
      Because... I am, CANADIAN

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      • #4
        I thought oversize were smaller to make up for the crank journals being cut down.
        Ben
        60DegreeV6.com
        WOT-Tech.com

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        • #5
          i believe he meant to say undersized bearings, taking up the slack for the lil bit of wear on the crank..
          got zap-straps?
          89 Z24
          13.886 @ 96.16 mph
          street trim - slicks

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          • #6
            Clevite has .25mm, .50mm, .75mm, an 1mm undersize bearings with a part number of: MS2037P

            Does that help?
            Regards,

            Todd E. Johnson

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            • #7
              You guys are right, undersized bearings! I think of them as 'oversized' because the bearing is .001" thicker than stock

              Main Bearing Clearance for an LH0 motor is 0.0012 - 0.0030", so I'm on the outer limit right now. That's why I'm looking for some .001" bearings. That would be like a .025mm bearing

              Currently using standard sized MS2073P Clevites.
              3.1L \'88 Camaro - 16G @ 9.5psi
              222/291 @ wheels

              T61 on the way!

              Comment


              • #8
                OMFG - THEY MAKE .001" UNDERSIZED BEARINGS FOR A BUICK 3.0L?! I've never even HEARD of this motor - yet they have undersized bearings? I'm going to keep looking...
                3.1L \'88 Camaro - 16G @ 9.5psi
                222/291 @ wheels

                T61 on the way!

                Comment


                • #9
                  i think its like an uber-destroked 3.8, or smaller bores.

                  btw it may have been .003 bearings i saw, but im pretty sure it was .001

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