Scorpion # 253 project

Discussion in 'X1/20 Forum' started by BEEK, Apr 19, 2017.

  1. BEEK

    BEEK True Classic

    Location:
    Clermont Fl
    there transmission case interference issues with a larger diameter. the 8x1.25 nut has a nominal thread thickness, I will ensure that that stays the same for thread engagement. may be able to make the pulley thicker though for additional thread area. Dont remember why i was doing it that way. dont have the parts in front of me.

    on a separate note: porsche boxter transaxle. I was thinking about using one for my other build. anything i should know?
     
  2. Dr.Jeff

    Dr.Jeff True Classic

    Location:
    Sin City
    That was how I envisioned it. Large enough diameter so the belt groove is outside of the CV bolts' circumference. That could even be made from a suitably sized water pump (or such) pulley off some vehicle. Cut open the middle and add holes for the (longer) CV bolts.
     
  3. Dr.Jeff

    Dr.Jeff True Classic

    Location:
    Sin City
    Ooops, I was typing as you posted that last comment (about case interference).
    How far would the pulley need to be offset to clear the case? The idea of using the pulley to replace the CV bolt nuts seems a bit iffy to me (no offense).
     
  4. Dr.Jeff

    Dr.Jeff True Classic

    Location:
    Sin City
    Check with Pete about a Boxster trans in a Scorpion, he is doing that.
     
  5. Pete Whitstone

    Pete Whitstone True Classic

    Location:
    McKinney, TX
    Kind of a general question so I'm not really sure what you are specifically looking for. In general I can tell you:

    1. The CV joint flanges plug right into the Fiat halfshaft stuff
    2. Used gear shift mechanisms/cables from Caymens/Boxsters are plentiful and cheap on eBay, this is apparently a common upgrade item.
    3. I think I paid about $700 for a good working unit, but that was about 4 years ago. No clutch/PP/flywheel, nor any of the linkage or gearshift stuff.
    4. The Boxster "S" units are 6 speeds, the non-"S" is a 5 speed, that's what I have.
    5. Pelican Parts is a great resource for parts and knowledge.
    6. The Porsche flywheel/clutch/PP arrangement has no springs in the clutch plate, I'm told that the flywheel has some kind of arrangement to make it absorb a bit of the initial bite. My combo of the SHO flywheel and the springless Porsche clutch might make for a hard bite on takeoff, haven't driven the car yet so we shall see. Something to think about if you are mating to a non-Porsche flywheel.

    That's about all I can think of.
     
  6. Dr.Jeff

    Dr.Jeff True Classic

    Location:
    Sin City
    Following Pete's comments on Porsche flywheels. I don't recall off hand which models of Porsche have what they call a "dual mass" flywheel (seems like a lot of 911's did in the 90's and beyond). It can be problematic and there is a mod to swap it with a standard flywheel (for the Porsche application). So if you plan to use a Porsche flywheel (which I highly doubt you would), then you might look into this before choosing one.
     
  7. kmead

    kmead Old enough to know better

    Location:
    Michigan
    Trying to thread a second inline set of threads is highly unlikely to work, particularly in multiples. They are also too shallow.

    Perhaps use overlong fasteners to go through the CV, flange, the pulley and use nuts to hold the pulley on.
     
  8. BEEK

    BEEK True Classic

    Location:
    Clermont Fl
    had a week doing "professional development" (waste of time), not really but sounded good. Back to school monday. I have ordered a few things to make progress on my transmission linkage and shifter. Will post more next week. Kids are gone for summer so I can get a lot done. Lets hope.
     
  9. BEEK

    BEEK True Classic

    Location:
    Clermont Fl
    worked on the engine a little this week, got the dry sump belt worked out. Also got the expansion tank made. IMG_7991.JPG IMG_7998.JPG IMG_7997.JPG IMG_8001.JPG IMG_8004.JPG IMG_7999.JPG
     
    kmead and rjplenter like this.
  10. Dr.Jeff

    Dr.Jeff True Classic

    Location:
    Sin City
    Well done my friend, very cool. Lots of trick stuff there. ;)
     
  11. Enjoying this thread.
     

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