leanout on 2step

Discussion in 'PSI Superchargers Tech Questions' started by iron468, Mar 7, 2015.

  1. iron468

    iron468 Member

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    i look to install a lean out on transbrake its better to instal before or after barrel valve ? and i began with what size of jets ?hemi coan converter 1471 4500 on transbrake (2 step)
     
    #1
    iron468, Mar 7, 2015
  2. bruce mullins

    bruce mullins Top Dragster

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    pull it out before the barrel valve. I take it right off the top of the pump. as for the jet, that depends on how rich it is while on the 2-step. your pump will play into that.
     
    #2
    bruce mullins, Mar 7, 2015
  3. Mike Canter

    Mike Canter Top Dragster
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    Have you got a fuel flow sensor? If you do I would start with around 5.5 GPM. If no fuel flow then try an 80 jet. Do you know how much boost you are making on the two step?
     
    #3
    Mike Canter, Mar 7, 2015
  4. iron468

    iron468 Member

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    I don't have flow sensor and i don't know how mutch boost .but i have egt drop to near 400.what is the best egt temps on 2 step
     
    #4
    iron468, Mar 8, 2015
  5. Mike Canter

    Mike Canter Top Dragster
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    Average of 625
     
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    Mike Canter, Mar 8, 2015
  6. SoDak

    SoDak Active Member

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    Whats the common setup to measure this?
    1/4" diameter thermocouples, exposed tip, sticking into the zoomie tube by about 1/2"???
     
    #6
    SoDak, Mar 8, 2015
  7. Mike Canter

    Mike Canter Top Dragster
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    Tips have to be dead center in the tubes
     
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    Mike Canter, Mar 8, 2015
  8. iron468

    iron468 Member

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    Thank you for your help
     
    #8
    iron468, Mar 8, 2015
  9. SoDak

    SoDak Active Member

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    Are you using 1/8", 3/16 or 1/4"?
     
    #9
    SoDak, Mar 10, 2015
  10. Mike Canter

    Mike Canter Top Dragster
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    Using standard RacePak probes. Never measured them but would guess 1/8", why do you ask?
     
    #10
    Mike Canter, Mar 10, 2015
  11. Mark Leigh

    Mark Leigh Member

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    Standard K type sensors are 1/4 inch dia --
     
    #11
    Mark Leigh, Mar 10, 2015

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