Main Bypass Pills Drill Sizes

Discussion in 'PSI Superchargers Tech Questions' started by Brad671, Jan 23, 2010.

  1. Brad671

    Brad671 Member

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    Does anybody know have a main bypass pill drill size chart they would like to send me or know where I can find one?

    Regards,

    Brad
     
    #1
    Brad671, Jan 23, 2010
  2. Mike Canter

    Mike Canter Top Dragster
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    Brad, I will be a little nosey and ask why you need that? I have found that the drill size does not have anything to do with the GPM flowed through the jet. I can measure six size 80 jets and be all the same in drill size but all different in flow. If you are concerned with flow accuracy then I recommend buying flowed jets from Ralph Gorr Fuel Systems.

    Also I have found that drilling a jet is really bad because it can leave rough edges in the orifice that really screw up the flow.
     
    #2
    Mike Canter, Jan 23, 2010
  3. Bob Meyer

    Bob Meyer Comp Eliminator

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    Mike and Brad; as an amen to that, while standing in front of Ralph's bench one night, we flowed a jet, pulled it out, scraped the backside with a FINGERNAIL, put it back in and flowed again and picked up a tenth of a gallon!
    NO BS!:eek:
     
    #3
    Bob Meyer, Jan 23, 2010
  4. Brad671

    Brad671 Member

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    Mike,
    I was reading this forum (http://www.insidetopalcohol.com/showthread.php?t=27258&highlight=high+speed) and was wondering where you get the diameter of the main pill hole to work out the area.
    I have a high speed on my system but haven't used it as yet but am thinking about it now to assist with get the car of the line.
    So I need to know what size jet to change to in the main system when I start to use my high speed. I know that one pill/jet can read differently from another with the same number but I am just after a starting point and I'll fine tune at the track.
    Regards
    Brad
     
    #4
    Brad671, Jan 23, 2010
  5. Mike Canter

    Mike Canter Top Dragster
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    Brad, if I understand you correctly then what you need is a chart of jetsize, the area of the orifice and the GPM that jet flows. If so then I can supply you with that if you email me at mike.c@mindspring.com. It will make everything easier for you.

    My thanks to Ralph Gorr Fuel Systems for this chart.
     
    #5
    Mike Canter, Jan 23, 2010
  6. Brad671

    Brad671 Member

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    Thanks Mike thats what I'm after.
    Emailing you now.
    Thanks again,
    Brad
     
    #6
    Brad671, Jan 23, 2010
  7. eli

    eli Banned

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    Mike wile your at it send me one too. Gene
     
    #7
    eli, Jan 24, 2010

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