SCREW BLOWN SBC Rod bearing question

Discussion in 'PSI Superchargers Tech Questions' started by rickey, Aug 20, 2012.

  1. rickey

    rickey Member

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    which series you use?

    I recently had 663HND version all burnt and ended in major engine damage
    ~5 passes on bearings with 3 oil changes in between,

    oil pressure was good
    main bearings looked brand new

    Valvoline 50 oil with 1 lucas

    this was first rod bearing failure in 6 years
     
    #1
    rickey, Aug 20, 2012
  2. Bob69

    Bob69 Member

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    bearings

    What sort of clearance, oil pressure and RPM are you pulling
     
    #2
    Bob69, Aug 21, 2012
  3. B.DOUCET

    B.DOUCET New Member

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    After six years, then problems in five passes, it sounds more like a clearance issue. Did you change the crank are rod's?
     
    #3
    B.DOUCET, Aug 21, 2012
  4. rickey

    rickey Member

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    didn't change rods or crank
    only change bearings

    did not check cearance on new bearing set

    anyone ever got a bad set?

    70lbs oil pressure

    8-9000 rpms
     
    #4
    rickey, Aug 21, 2012

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