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Thread: bearing clearances bbc

  1. #1
    Senior Member SENIOR BUILDER
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    bearing clearances bbc

    getting ready to put together 454 .040 over forged 4" crank factory rods (stess tested and ballanced) kb hyp 257 pistons 781's with 2.19 int valve bowl work and a .629 lift mech flat tappet wanting to know bearing clearance on mains and rods and endplay and if you could throw out some hp and tq numbers?
    if something goes wrong there is always the cooler!!!

  2. #2
    Senior Member RACING JUNKIE
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    If the crank measures standard, i almost alway buy .001 over bearing on both rods and mains, giving me .002/.0025 clearance, .022 side clearance.
    I hope you put new good ARP bolts in the rods.

    Zip.

  3. #3
    Senior Member SENIOR BUILDER
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    yes they have arp rod bolts
    if something goes wrong there is always the cooler!!!

  4. #4
    Senior Member SENIOR BUILDER
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    what is the best way to set thrust bearings? have all toqed and loosen rear cap pry back and then forward with crank then torque?
    if something goes wrong there is always the cooler!!!

  5. #5
    Senior Member RACING JUNKIE
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    Quote Originally Posted by ejm
    what is the best way to set thrust bearings? have all toqed and loosen rear cap pry back and then forward with crank then torque?
    Right on, pry forward last then torque.

    Zip.


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