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Technical Early Hemi ? Baby Red Ram Crankshaft Question.

Discussion in 'Traditional Hot Rods' started by Jeff Norwell, Feb 22, 2014.

  1. Jeff Norwell
    Joined: Aug 20, 2003
    Posts: 14,105

    Jeff Norwell
    MODERATOR
    Staff Member

    Is there a difference in size on the crankshafts of a 241 and a 270 Dodge Red Ram Crankshaft?
    Not talking about hi-deck 315s or 325s.
    241>><<270 ONLY
    Looking at the interchangeability between engines….
    I have heard the thrust journal or rear main are different sizes.
    Looking for clarification.

    thanks
     
  2. Hnstray
    Joined: Aug 23, 2009
    Posts: 12,308

    Hnstray
    ALLIANCE MEMBER
    from Quincy, IL

    According to Leo Lundquist's "Hemi Engine Data Book", the poly/hemi 241/259/270 engines are the same dimensions, passenger and truck. There are three different forging numbers and likewise, three parts numbers.

    Forging #'s 1402538, 1402625, 167111 (this # is only 6 digits in book)

    Part #'s 1328372 (T) (soft), 1671108 (T) (medium), 1484100 (T) (hard)

    (T) denotes part number that was originally for a truck application
     
  3. Jeff Norwell
    Joined: Aug 20, 2003
    Posts: 14,105

    Jeff Norwell
    MODERATOR
    Staff Member

    Thank you Hnstray.I had some conflicting reports of the rear or main journals to be different sizes between a 241 and 270.
     
  4. 270dodge
    Joined: Feb 11, 2012
    Posts: 742

    270dodge
    Member
    from Ohio

    241, 270 crankshafts- bearings interchange. Same thing.
     

  5. Jeff Norwell
    Joined: Aug 20, 2003
    Posts: 14,105

    Jeff Norwell
    MODERATOR
    Staff Member

    Thank you 270 Dodge
     
  6. Hnstray
    Joined: Aug 23, 2009
    Posts: 12,308

    Hnstray
    ALLIANCE MEMBER
    from Quincy, IL

    According to the book, the same main bearing set (1315484 std. size #) fits 241,259,270 Dodge car and truck and Desoto 276/291 engines.
     
  7. Jeff Norwell
    Joined: Aug 20, 2003
    Posts: 14,105

    Jeff Norwell
    MODERATOR
    Staff Member

    I need to pick Leo's book up. if still in print.

    Thank you
     
  8. Hnstray
    Joined: Aug 23, 2009
    Posts: 12,308

    Hnstray
    ALLIANCE MEMBER
    from Quincy, IL

    I believe Hemi Hotheads has them......It is fantastic reference source, very comprehensive.
     
  9. Jeff Norwell
    Joined: Aug 20, 2003
    Posts: 14,105

    Jeff Norwell
    MODERATOR
    Staff Member

    Good stuff Hnstray
    Thank you!
     
  10. 32 Spitfire
    Joined: Dec 26, 2008
    Posts: 984

    32 Spitfire
    Member

    Hi Jeff,

    I think many of the parts are interchangeable. We used many 241 parts on our recent 270 build. Another really good book we used quite often is "The Complete Chrysler Hemi Engine Manual" by Ron Ceridono.

    Also Eric and Bob at Hot Heads were very helpful.

    Our Build thread: http://www.jalopyjournal.com/forum/showthread.php?t=862612&highlight=32+spitfire

    Thanks again on your encouraging emails and please let me know if I can be of anymore help!

    Todd-32 Spitfire
    High Noon Speed Shop
    [​IMG]
     
  11. Same crank/stroke, different bore size. How is your wife doing since the fire accident
     
  12. Jeff Norwell
    Joined: Aug 20, 2003
    Posts: 14,105

    Jeff Norwell
    MODERATOR
    Staff Member



    Todd!.. thank you for the answer. your deuce looks awesome!!!!

    Thanks Panneton Bros.!
    My wife is all healed and is doing very well.
    Thanks for the info!!

    Jeff
     
  13. TR Waters
    Joined: Nov 18, 2006
    Posts: 1,439

    TR Waters
    Member
    from Vermont
    1. Early Hemi Tech

    These cranks are especially prone to cracking. If buying one, don't pay a lot without verification of the condition.
     
  14. Jeff Norwell
    Joined: Aug 20, 2003
    Posts: 14,105

    Jeff Norwell
    MODERATOR
    Staff Member

    Agreed
    thank you!
     
  15. 32 Spitfire
    Joined: Dec 26, 2008
    Posts: 984

    32 Spitfire
    Member

  16. 32 Spitfire
    Joined: Dec 26, 2008
    Posts: 984

    32 Spitfire
    Member

  17. sunbeam
    Joined: Oct 22, 2010
    Posts: 5,759

    sunbeam
    Member

    Crank cracks were mainly because of no damper but trucks usally did have one.
     
  18. Kirk Hanning
    Joined: Feb 27, 2005
    Posts: 1,603

    Kirk Hanning
    Member

    More 241" candy complete rebuild, w/mild cam, 3 deuces straight linkage, T5 tranny with a quickie banjo 3:73 rear end. 22 mpg :)
     

    Attached Files:

  19. 270dodge
    Joined: Feb 11, 2012
    Posts: 742

    270dodge
    Member
    from Ohio

    Check the crank for cracks then add a damper from a 318, 383 or 440 neutral balance engine. You either broach the damper to fit the hemi key or use a TR Waters key. Make sure to set the top dead center mark after the change.
     
  20. 270dodge
    Joined: Feb 11, 2012
    Posts: 742

    270dodge
    Member
    from Ohio

    And yes 32spitfire compression- you right!
     
  21. EARLYHEMIBILL
    Joined: Apr 7, 2008
    Posts: 465

    EARLYHEMIBILL
    Member
    from ?

    I'm with you on those pistons. I got a set of 10-1 Venolias for my 341 Desoto. My neighbor has a 241 Dodge going into a 64 Valiant wagon. He got a 268 degree cam for it along with a 3-duece intake with the 2-bbl GM 4 bolt carbs adapted to it. He left the compression at 7.2-1. I think he will regret not stepping up the compression.
     
  22. Jeff Norwell
    Joined: Aug 20, 2003
    Posts: 14,105

    Jeff Norwell
    MODERATOR
    Staff Member


    Yes Sunbeam,Always leary of Car cranks.. never any factory dampeners. just trucks


    Kirk…. what a wonderful baby hemi set up… we are running similar driveline set ups.. glad too hear your happy… what dizzy are you running?

    Yes…I am using a 318 dampener.The dampener is broached.


    Thanks EARLYHEMIBILL!
     
  23. Kirk Hanning
    Joined: Feb 27, 2005
    Posts: 1,603

    Kirk Hanning
    Member

    Jeff, the dizzy is a Vertex mag for a tall deck 392" Hemi. I machined a .750"? Spacer that fits between the block & distributor to make it work.
     
  24. Jeff Norwell
    Joined: Aug 20, 2003
    Posts: 14,105

    Jeff Norwell
    MODERATOR
    Staff Member

    Kirk. thats awesome. will you be bringing that fine baby hemi to Detroit?. if so…I love to say hello and peruse your always awesome work.
     
  25. 32 Spitfire
    Joined: Dec 26, 2008
    Posts: 984

    32 Spitfire
    Member

    Kirk Hanning,

    That is another sweet Dodge Red Ram! I saw the mag on your motor too. I have a nice old Vetex mag for the small Dodge Hemi on the bench but we decided not to use it on this build because of the modern tach we went with but maybe someday on another build. Maybe a 32 Ford pick-up in my dreams..........of course with another Dodge Red Ram!

    We can't forget to mention a rather warm cam from Racer Brown!

    http://www.jalopyjournal.com/forum/showthread.php?t=862612&highlight=32+spitfire

    Todd-32 Spitfire
    High Noon Speed Shop

    [​IMG]
     
  26. Kirk Hanning
    Joined: Feb 27, 2005
    Posts: 1,603

    Kirk Hanning
    Member

    Jeff, this will be the first year that I'll be carless at Autorama for some time. It'll be refreshing to be just a bystander for the weekend. I'm confident that we'll cross paths and look forward to meeting you!
     
  27. George
    Joined: Jan 1, 2005
    Posts: 7,546

    George
    Member

    They're an advertised 7.0-7.1, but one measured out @ 6.19!:eek:
     
  28. EARLYHEMIBILL
    Joined: Apr 7, 2008
    Posts: 465

    EARLYHEMIBILL
    Member
    from ?

    We did some measuring on the 330 and 341 Desotos. The 330 is supposed to be 8.5-1 but actually comes out to about 7.9-1. My 341 was listed at 9.25-1, but cam out to about 8.6-1. The 341 had pistons sitting down .012" down the hole. The 10-1 venolias I got for it sit .080" above the deck. That's supposed to be for only a 3/4 point increase. I think the advertised listings were just used to sell the cars.
     
  29. George
    Joined: Jan 1, 2005
    Posts: 7,546

    George
    Member

    Yup!
     
  30. 73RR
    Joined: Jan 29, 2007
    Posts: 6,758

    73RR
    Member

    Given the overall cost of rebuilding these things another $300 for forgings is really a minor increase. Doesn't make much sense to skimp at that point considering how sweet they run with 10:1 c/r.

    .
     

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