Filling puke tank in 1 run

Discussion in 'PSI Superchargers Tech Questions' started by caseyspradlin, Mar 20, 2014.

  1. caseyspradlin

    caseyspradlin Member

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    I have 540 BBC big chief heads 1471 HHR 20% OD that is puking out about 1 qt oil each pass from pass side burndown. This motor was in dragster for several years with burn down at front center of valve cover pointing toward rear and never puked any oil. I swapped motors and put in door car this winter and had to move burn downs to the back center of valve covers pointing forward to clear front end. Instead of 1 large puke tank I have 2-2qt tanks on each side of fuel cell in front of engine. Pass side fills up and pukes a lot out even comes out the breather on each run.

    I swapped tanks to make sure it wasn't a defective tank, leaked the motor, compression checked, everything is great.

    I put a plate/baffle underside of burndown covering the hole 1/4" below ... no help. Valve cover hole is in-between two rocker arms.

    I am assuming it's the position of burndowns because this is the only thing that has changed but it will be a big hassle to move back up front with the front end so wanted to get confirmation that this would most likely fix it before I did the work.

    Driver side pukes zero oil.

    Thanks in advance ITA.
     
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  2. jody stroud

    jody stroud ZOMBIE Top Dragster

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    Big chief heads will fill up with oil and with the burn down tubes at the rear it will be a problem. Need to move to the middle of the valve cover. Pass side probably has a harder time draining due to crankshaft windage. You also need a bigger tank than two quarts. If all else fails you could try a vac pump and try to make the drains bigger in the heads. When I ran a Chevy I had a -8 on each end of of the heads going to a tee in the oil pan on ea side to help with drain back.
     
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