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jahns book

Discussion in 'The Hokey Ass Message Board' started by 1964reo, Dec 19, 2012.

  1. 1964reo
    Joined: Aug 2, 2012
    Posts: 138

    1964reo
    Member
    from mn

    does anybody have a old jahns book for part number look up thanks
     
  2. you might shoot a PM to "Little wing" here on the board...she has tons of old catalogs
     
  3. 1964reo
    Joined: Aug 2, 2012
    Posts: 138

    1964reo
    Member
    from mn

  4. saltracer219
    Joined: Sep 23, 2006
    Posts: 639

    saltracer219
    Member

    I have an old Jahns catalog, if you let me know the number I would be glad to take a look.
     
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  5. 1964reo
    Joined: Aug 2, 2012
    Posts: 138

    1964reo
    Member
    from mn

    thanks the number on the piston are 192x i bought as a 4 1/8 stroker piston for a merc flathead
     
  6. saltracer219
    Joined: Sep 23, 2006
    Posts: 639

    saltracer219
    Member

    There are no piston numbers even close to that in my book. The flathead piston numbers in my book are c790dr with different strokes available. I would give them a call. They are in Anaheim Ca. 714-579-3795
     
  7. Vimtage Iron
    Joined: Feb 28, 2010
    Posts: 497

    Vimtage Iron
    Member

    I thought Jahns was bought up by someone a few years ago.
     
  8. 1964reo
    Joined: Aug 2, 2012
    Posts: 138

    1964reo
    Member
    from mn

    thanks that is only thing on the pistons if i had a 4 inch stroke piston to match it to then i would know
     
  9. propwash
    Joined: Jul 25, 2005
    Posts: 3,858

    propwash
    Member
    from Las Vegas

    are they labeled Jahns? or did the seller just tell you they were?
     
  10. 1964reo
    Joined: Aug 2, 2012
    Posts: 138

    1964reo
    Member
    from mn

    they are lable on the bottom of the piston it has jahns on one side and192x on the other side
     
  11. 1964reo
    Joined: Aug 2, 2012
    Posts: 138

    1964reo
    Member
    from mn

    the piston has 1/8 lc on the top and 3 5/16

    they are shorter then my 3 3/4 stroke pistons by 125 so they must be 4 inch stroke so what is th 1/8lc stan for
     
  12. 54nomore
    Joined: Nov 5, 2012
    Posts: 137

    54nomore
    Member
    from illinois

    1/8" less or( lower) compression distance I would guess.
     
  13. 57Custom300
    Joined: Aug 21, 2009
    Posts: 1,264

    57Custom300
    Member
    from Arizona

    I emailed the people in Anahiem & they told me they didnt have the books for old Jahns pistons
     
  14. I'll see if I can find that number !! >>>>.[​IMG]
     
  15. 192XD fits 1939-53 Mercury
    8-cyl dia. 3-5/16,3-3/8,3-7/16,3-1/2
    length2-25/32 plus 3/16 dome
    comp.1-35/64
    pin 750-FF
    rings 2-3/32-C
    1-5/32-O
    Last Footnote--- Give Stroke When Ordering.
     
  16. 1964reo
    Joined: Aug 2, 2012
    Posts: 138

    1964reo
    Member
    from mn

    thanks for the help
     
  17. fordcpe
    Joined: Nov 4, 2005
    Posts: 634

    fordcpe
    Member

    Heres how I think it works 1/8 is the wrist pin is higher in piston by 1/8. 3-3/4 stroke ford with this piston would be low compress with this piston. 4 inch stroke merc crank has 1/4" more stroke 1/8 higher and 1/8 lower so you have 4" stroke merc pistons that are 3 5/16 bore.
     
  18. 1964reo
    Joined: Aug 2, 2012
    Posts: 138

    1964reo
    Member
    from mn

    so you think i have a 3 3/4 stroke -1/8 that would be the same as a 4 inch stroke then
     
  19. 54nomore
    Joined: Nov 5, 2012
    Posts: 137

    54nomore
    Member
    from illinois

    If the #192's are only 1/8" shorter than the pistons that you KNOW to be for 3-3/4" stroke, then I would think they were intended for use with a 4" stroke (as you said in post #11), not 4-1/8" stroke. Maybe thats why somebody got rid of them?

    Ron.
     
  20. 1964reo
    Joined: Aug 2, 2012
    Posts: 138

    1964reo
    Member
    from mn

    that is what i was thinking they have the 1/8 lc on top i bought as a 4 1/8 stroke that was i was told they were
    if i stick a pin from one piston to the other one it is .125 shorter then my 3 34 that i took out of my block
    so if they were 4 1/8 theyshould be shorter yet by anouther .0625 right
     
  21. 54nomore
    Joined: Nov 5, 2012
    Posts: 137

    54nomore
    Member
    from illinois

    That is absolutely correct. You might get away with them on a 4-1/8" stroke, but compression would be awful high. Also the skirts might not clear the counterweights at or near bottom of the stroke. Just curious, is the pin the same height from the bottom of piston on both? I would think that they would have to be, or you would have the interference problem I just mentioned.
     
  22. 1964reo
    Joined: Aug 2, 2012
    Posts: 138

    1964reo
    Member
    from mn

    yes they are on the front and back sides but on the top and bottom they are longer by a little
     

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