Main and Rod Bearing Clearance

Discussion in 'PSI Superchargers Tech Questions' started by defbob, Apr 15, 2012.

  1. defbob

    defbob New Member

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    I am building a twin turbo alcohol Hemi. My hp goal is between 2500-3000hp. I have a solid cast aluminum block and a system 1 wet sump pump 1.8" (AN16 feed). I have yet to order a rotating assembly (going with BME aluminum rods and a Bryant crank with coated bearings.) What bearing clearances should I look for?
     
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  2. Ken Sitko

    Ken Sitko Super Comp

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    I like between 4.5 and 5.5 thou on the mains with 60 wt oil, the rods will be about the same after a few runs, but when you get new rods they typically are a bit bigger than that, usually more than 6 thou. After a few runs the rods close up a bit.

    Wondering why you are going with a wet sump, nothing but problems, you may run out of oil before you get to the finish line.
     
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  3. defbob

    defbob New Member

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    I hope 13qts will be enough. I am building a car for 1/8 mile outlaw drag radial.
     
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    Last edited: Apr 15, 2012
  4. badbird

    badbird New Member

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    you will need to oil and scavenge oil from your turbos,
    most turbo hemis choose to use a multi stage dry sump pump,
     
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  5. defbob

    defbob New Member

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    thank you guys
     
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