OIL PRESURE AFTER FINISH LINE

Discussion in 'PSI Superchargers Tech Questions' started by DON KANENWISHER, Jun 23, 2004.

  1. DON KANENWISHER

    DON KANENWISHER New Member

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    WE ARE RUNNING A BRAD BILLET BLOCK, WITH BRAD 5 HEADS, PLUGER DRY SUMP PUMP, A .060 RESTRICTOR TO THE ROCKER ARMS, 18 QTS. OF KENDELL 70. COMPUTER SHOWS 100 LBS. OF OIL PRESSURE UNTIL THE THROTLE IS LET UP THEN WITH IN ABOUT 1/4 SECOND WILL GO DOWN TO ABOUT 6 LBS. AT TIMES ABOUT 3 TO 4 SECONDS LATER MAY GO UP TO 75LBS. I AM THINKING THE OIL IS STAYING IN THE VAVLE COVERS AND NOT GETING BACK TO THE PUMP. ANY IDEAS.
     
    #1
    DON KANENWISHER, Jun 23, 2004
  2. Will Hanna

    Will Hanna We put the 'inside' in Top Alcohol
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    if possible run more oil. if your tank isn't big enough, get a bigger tank. we run 21 plus one in the filter in our plueger dry sump system, and have plenty of oil pressure....120 during the run, and drops off after the run, but not that low. jason kills the motor as soon as the chutes hit with the kill switch.
     
    #2
    Will Hanna, Jun 23, 2004
  3. aj481x

    aj481x Member

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    We had this exact problem with our Alan Johnson motor, added 2 more quarts of oil, no problem for 2 years. Note, we also use a tall, vertical Peterson tank which keeps more oil around the pickup. [​IMG]
     
    #3
    aj481x, Jun 23, 2004
  4. Nathan Sitko - 625 TAD/TAFC

    Nathan Sitko - 625 TAD/TAFC TAD / TAFC

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    We had the same problem with the oil pressure dropping a whole ton a few years ago. After hurting a few motors we installed one of those Moroso Accusump deals on the car, which hold an extra 3 quarts under pressure and shoves it into the pump when there is a sudden drop in oil pressure. Haven't hurt a bearing since then that was oil related. And at the finish line the gauge doesn’t go close to zero anymore, usually is around 20 lbs or so.

    We ran it on our dragster for a year, then when we switched to Funnycar we threw it on there...cheap insurance, and it probably gives you a second or two more of time to react when something is going sour.
     
    #4
    Nathan Sitko - 625 TAD/TAFC, Jun 24, 2004
  5. Danny Humphreys

    Danny Humphreys Member

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    Accusump is the shit, works like a champ.
     
    #5
    Danny Humphreys, Jun 24, 2004

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