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1GR-FE 2.0” drive pulley on TRD supercharger

Discussion in '2nd Gen. Tacomas (2005-2015)' started by Athlaos, May 12, 2018.

  1. May 23, 2018 at 8:55 AM
    #61
    Athlaos

    Athlaos [OP] Destruction Mode

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    2011 SR5 Manual TRD SC 1.87" pulley
    A flux retro-capacitance encabulator
    They're always big heat pumps.... lol

    Speed isn't really the issue. The pressure of the manifold is a better indicator. I was told/reading that under 13 psi you're still getting ok returns. I calculated my blower spins at just under 30000rpm.
     
  2. May 23, 2018 at 11:10 AM
    #62
    ThomasMore66

    ThomasMore66 We can't stop here, this is bat country!

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  3. May 23, 2018 at 11:18 AM
    #63
    Athlaos

    Athlaos [OP] Destruction Mode

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    2011 SR5 Manual TRD SC 1.87" pulley
    A flux retro-capacitance encabulator
    Thanks, is good info. Although I hear w are actually MP90 not M90. Don't make a difference for RPM calculation though... all I did was do a ratio of the diameter of crank to drive pulley, then multiplied by max crank rpm.
     
  4. May 23, 2018 at 12:35 PM
    #64
    Roostfactor

    Roostfactor Well-Known Member

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    HPT/justDSM tuned factory ecu, URD Headers, JFR Y-Pipe/l 3" exhaust, Walbro 255 fuel pump, Maggy SC (JFR ported), JFR ported lower intake manifold, 76mm tb, 2.5 pulley, 640cc injectors, CSF Radiator, custom electric fan wit Autocoolguy controller, JFR SC pulley wrap mod
    That's what I used. Put it in before I even installed the sc. I have no idea if it's better or not but I bought into the hype.
     
  5. May 23, 2018 at 12:41 PM
    #65
    Roostfactor

    Roostfactor Well-Known Member

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    Our crank driven pulley is 6.5". 6.5÷2.0x5500=17850
     
  6. May 23, 2018 at 12:46 PM
    #66
    Roostfactor

    Roostfactor Well-Known Member

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    HPT/justDSM tuned factory ecu, URD Headers, JFR Y-Pipe/l 3" exhaust, Walbro 255 fuel pump, Maggy SC (JFR ported), JFR ported lower intake manifold, 76mm tb, 2.5 pulley, 640cc injectors, CSF Radiator, custom electric fan wit Autocoolguy controller, JFR SC pulley wrap mod
    Ours is in fact an mp90 which I think is just Magnuson's case with Eaton rotors. Ours is a gen V though and the link you posted is for an older version. What we need to look at then is an efficiency island. So @ThomasMore66 I will leave this here. :)
    awww.eaton.com_ecm_groups_public__pub__eaton__per_documents_content_ct_128485.gif
     
  7. May 23, 2018 at 1:37 PM
    #67
    Athlaos

    Athlaos [OP] Destruction Mode

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    2011 SR5 Manual TRD SC 1.87" pulley
    A flux retro-capacitance encabulator
    Shit that's an awesome chart. Thanks.
     
  8. May 23, 2018 at 1:37 PM
    #68
    Athlaos

    Athlaos [OP] Destruction Mode

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    A flux retro-capacitance encabulator
    Lol. I measured the crank at 10". Maybe I had too many beers. Tape measure might also be broken. I'll take your word for it anyway.
     
  9. May 23, 2018 at 1:48 PM
    #69
    Athlaos

    Athlaos [OP] Destruction Mode

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    2011 SR5 Manual TRD SC 1.87" pulley
    A flux retro-capacitance encabulator
    This makes me wonder. What would happen if I installed a 10" crank pulley then.... ? Lol
     
    Roostfactor[QUOTED] likes this.
  10. May 23, 2018 at 1:50 PM
    #70
    Larzzzz

    Larzzzz Grande' Ricardo

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  11. May 23, 2018 at 2:30 PM
    #71
    ThomasMore66

    ThomasMore66 We can't stop here, this is bat country!

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    Sooo, if I'm reading this right 17850 is off the chart...
     
  12. May 23, 2018 at 4:24 PM
    #72
    Roostfactor

    Roostfactor Well-Known Member

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    20170629_140632.jpg
    Not bad but not perfect. With my ocd though I would be thinking about it not being perfect forever until I fixed the issue (even if there wasn't really an issue).
     
  13. May 23, 2018 at 4:25 PM
    #73
    Roostfactor

    Roostfactor Well-Known Member

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    Time to extrapolate Tomas.
     
  14. May 23, 2018 at 4:30 PM
    #74
    Roostfactor

    Roostfactor Well-Known Member

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    @Athlaos, when you measured your pulley as 2.0 did you measure from the base of the grooves or the top of the ribs?
    All the pulleys I have used measured true to size when measured from the top of the ribs.
     
  15. May 23, 2018 at 4:35 PM
    #75
    White lightning boosted

    White lightning boosted Well-Known Member

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    Mm. Ribs sound good.
     
  16. May 23, 2018 at 4:45 PM
    #76
    ThomasMore66

    ThomasMore66 We can't stop here, this is bat country!

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    Efficiency is way down by that point. Pressure ratio is off of atmospheric I’m presuming.
     
    Roostfactor[QUOTED] likes this.
  17. May 23, 2018 at 5:35 PM
    #77
    Athlaos

    Athlaos [OP] Destruction Mode

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    2011 SR5 Manual TRD SC 1.87" pulley
    A flux retro-capacitance encabulator
    Top of the ribs I measured with some calipers. They were supposed to send me 2.2"...
     
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  18. May 23, 2018 at 5:37 PM
    #78
    Athlaos

    Athlaos [OP] Destruction Mode

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    A flux retro-capacitance encabulator
    I should be at a PR of about 2.0.
     
  19. May 24, 2018 at 8:07 AM
    #79
    Roostfactor

    Roostfactor Well-Known Member

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    Correct. The standard is 14.7psi or 29.92 in hg at sea level at 59°F.
    So you are close to that.
     
    Athlaos[QUOTED][OP] likes this.
  20. May 24, 2018 at 8:30 AM
    #80
    ThomasMore66

    ThomasMore66 We can't stop here, this is bat country!

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    That's the standard, but I'm at about 14.35 at my elevation. I'm guessing you're about 14.2 in WF. Edmonton would be about 13.6. So at 13 psi not quite a 2 PR. I just feel there's not much more in the SC at that point.

    https://www.mide.com/pages/air-pressure-at-altitude-calculator
     

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