Leak Down Guage

Discussion in 'PSI Superchargers Tech Questions' started by BigB, Aug 17, 2009.

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  1. BigB

    BigB New Member

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    I need to know what brand of leak down gauge you guys prefer.
    I have the simplest one that summit sells but its not as accurate as I would like, but I guess then again I don't want to spend a fortune.
    Please give me what you guys like and where to get it.
     
    #1
    BigB, Aug 17, 2009
  2. Judd Racing

    Judd Racing New Member

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    I use a moroso and I've seen several others using the same in the pits. I bought mine on eBay for $20 used since the seller had lost some of the fittings.
     
    #2
    Judd Racing, Aug 17, 2009
  3. Eric David Bru

    Eric David Bru Member

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    I use Tavia, but they are no longer in business... :confused:
     
    #3
    Eric David Bru, Aug 17, 2009
  4. Mike Canter

    Mike Canter Top Dragster
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    BigB, are you just going to use thise leakdown gauge for leaking the cylinders down or are you going to also use it to check and set poppets and barrell valves?
     
    #4
    Mike Canter, Aug 17, 2009
  5. GregM784

    GregM784 Member

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    Tavia's out of business? I have one of those.
     
    #5
    GregM784, Aug 17, 2009
  6. BigB

    BigB New Member

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    Sorry Mike I should of been more specific.We are using it to leak down the Barrell Valve, I would appreciate if you would explain how to check and set the poppets with it I didnt know you could do that.
     
    #6
    BigB, Aug 18, 2009
  7. Mike Canter

    Mike Canter Top Dragster
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    I ordered large accurate gauges and an accurate regulator from both MSC and from Graingers and made by own leakdown tester. You would need to buy a couple of flowed accurate 80 bypass jets from Ralph Gorr or Davenport. I have one in between the two gauges as the internal regulating orifice and I use the other one as a checker. With 100 lbs on the first gauge (input preessure) with a 80 jet plugged on the output (mode a fitting) it should show 80%. That is the standard.

    I made adapter to hook up the poppets on the outpu side then start at zero pounds and turn up the regulator until it just cracks the poppet and air starts flowing and I read the pressure. If you leave it at a pressure below the crack pressure then there should be no airflow. If so then you need to check the poppet seating.
     
    #7
    Mike Canter, Aug 18, 2009
  8. eli

    eli Banned

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    You can't you need a separate gage to set the poppet's, check Eric Bru's site to see them.
     
    #8
    eli, Aug 18, 2009
  9. Mike Canter

    Mike Canter Top Dragster
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    No you don't, You can do it with a leak down tester. You just read the pressure off either gauge because they will both read the same up to the poppet crack point. Works great.
     
    #9
    Mike Canter, Aug 18, 2009
  10. blown375

    blown375 New Member

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    I use a waterman guage/regulator set up to set poppet pressures and a DSR leakdown tester to set the BV. works great.
     
    #10
    blown375, Aug 18, 2009
  11. eli

    eli Banned

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    How do you set your 190/200 lb. pump saver poppet?
     
    #11
    Last edited: Aug 18, 2009
    eli, Aug 18, 2009
  12. Eric David Bru

    Eric David Bru Member

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    [​IMG]

    [​IMG]

    [​IMG]

    [​IMG]

    Just for the record, my poppet tester only has one gauge... These are ELI's picts. Mine works for me, his works for him.

    EDB
     
    #12
    Eric David Bru, Aug 18, 2009
  13. Eric David Bru

    Eric David Bru Member

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    Sadly... Yes.

    EDB
     
    #13
    Eric David Bru, Aug 18, 2009
  14. TimeMachine

    TimeMachine Member

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    I was going to suggest one from Good Vibrations but it turns out they were Tavia. Best take good care of ours then!
     
    #14
    TimeMachine, Aug 19, 2009
  15. Mike Canter

    Mike Canter Top Dragster
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    I set my pump saver poppet using the car's CO2 bottle. I attach the poppet to it and turn up the bottle regulator while watching the gauge on the bottle.
     
    #15
    Mike Canter, Aug 19, 2009
  16. BigB

    BigB New Member

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    Thanks guys all this info is a help.....we will keep learning.
     
    #16
    BigB, Aug 19, 2009
  17. eli

    eli Banned

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    Top pic. is of my leak down tester,2 and 3 are of the poppet tester last one is of the first leak down tester i made with big gages as if I'm blind. any way the orifice is 0.040 not 0.080 it goes between the two gages i got mine from spud, The blow gun is to check nozzles the other is for jets. see this
    http://en.wikipedia.org/wiki/Leak-down_tester. the 3 gages for the poppet's are because a gage is the most accurate at the middle reading. Example 0 to 100 lb. gage is more accurate at 50 lbs. Gene Terenzio Sr.
     
    #17
    Last edited: Aug 20, 2009
    eli, Aug 19, 2009
  18. Flyboy68

    Flyboy68 Member

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    Would you need the orfice if you put the first gauge on the regulator instead of behind it?
     
    #18
    Flyboy68, Aug 20, 2009
  19. Comax Racing

    Comax Racing Member

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    Poppet tester

    Eli, I was able to see how you built the poppet tester in the second picture but the little piece of braided line has me a little stumped. What is it for??:)


    Thanks
    Corey
     
    #19
    Comax Racing, Aug 20, 2009
  20. eli

    eli Banned

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    It adapts to the # 8 fitting and gets reduced to a # 6 so I can adj.# 6 poppet. There is a fitting that goes from # 8 to # 6 but this is what i had.
     
    #20
    Last edited: Aug 20, 2009
    eli, Aug 20, 2009
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