cam shafts

schillaz
schillaz Expert Adviser
edited November -1 in HUDSON
Does anyone have any info on cam shaft serial numbers?



i have 3 of them all begin with different serials and im wondering what the difference is and what motors i can use them in.



the following are the beginning 3 number of the serials stamped on the cams

300xxx

306xxx

309xxx



thanks for any info

Comments

  • Ol racer
    Ol racer Senior Contributor
    FYI

    Go into Search Window and type hornet camshaft numbers and you will find all the Info your looking for.
  • schillaz
    schillaz Expert Adviser
    Im not sure i follow, Are you talking search this forum? because my search here didnt come up with any useful info unless i missed it? or are you talking search the web?



    Can you post a link or PM me with any info you have found?



    thanks



    ** this is all i have found so far **

    http://www.hudsonterraplane.com/tech/1952/sm/Vol4No4-April.pdf



    On page 2 bottom right, the 306xxx cam is listed.....im still looking for info on the 309xxx cam
  • [Deleted User]
    [Deleted User]
    schillaz wrote:
    Im not sure i follow, Are you talking search this forum? because my search here didnt come up with any useful info unless i missed it? or are you talking search the web?



    Can you post a link or PM me with any info you have found?



    thanks



    ** this is all i have found so far **

    http://www.hudsonterraplane.com/tech/1952/sm/Vol4No4-April.pdf



    On page 2 bottom right, the 306xxx cam is listed.....im still looking for info on the 309xxx cam
    The 306344 is the stock camshaft in all Hudson engines from 1948 to 1955. The one that starts with 309xxx is the cam shaft that Hudson install in first series 1956 with hydraulic lifters and was a bad timing chain stretcher. Had to recall, change lifters and cam, 306344. Walt.
  • schillaz
    schillaz Expert Adviser
    Ok but i just pulled a cam out of a 49 and the numbers on that are 300022. Is that stock?



    Here are the numbers of my three cams if someone has a parts book.

    300022

    306344

    309742
  • hudsontech
    hudsontech Senior Contributor
    schillaz wrote:
    Ok but i just pulled a cam out of a 49 and the numbers on that are 300022. Is that stock?



    Here are the numbers of my three cams if someone has a parts book.

    300022

    306344

    309742





    300022 - 1948-1949 Group Parts book (copy on my on-line library - see below for URL). This one is stock for 1948-1949 six cylinder.



    1952 parts catalog lists 306344 for 1952 six cylinder - somebody with a 48-54 parts catalog can fill in the other years.



    Hudsonly,

    Alex Burr

    Memphis, TN

    http://hetclub.org/burr
  • schillaz
    schillaz Expert Adviser
    Hudsontech, I agree with you 100%. Now im interested what the 309742 is out of.



    So would i be ok to replace my 300022 with the 306344 with out any trouble in my 49?
  • barrysweet52
    barrysweet52 Expert Adviser
    The following was posted on this site in the past.



    "All Hudson engines (232, 262 & 308) come with a 306344 cam which became the standard low HP cam for Hudsons in '53. The '54 Hudsons first came out with the 309742 (7X) "Flat-top" cam and later in April '54 was replaced with the 306344A series cam. The 311040 cam (Super 7X high- lift cam .390" gross lift) came out in the fall of '53 for all-out oval track racing and has been a "severe usage" cam since. The HP rating of all 308 std. engines equipped with Twin-H power and 7.5 to 1 C.R. (alum. head) using a 306344 cam is 155 HP when using a 309742 (7X flat top) cam the HP is 170; and when using the 311040 Super 7X cam the rating is 180 HP. Regards, Barry
  • bob ward
    bob ward Senior Contributor
    Going from memory here, but was not the "chain stretcher" cam used in 54 stepdowns, and the subject of a widescale recall?



    The chain stretcher cam or one very similar was used sucessfully in the hydraulic lifter 308's?
  • schillaz
    schillaz Expert Adviser
    I finally found some info on the 309742 courtesy of Jasper Kleinjan out of ND.

    Attachment not found.



    And here is some other High performance cam info

    Attachment not found.



    Hope this helps for anyone else looking at replacing their cam.
  • dougson
    dougson Senior Contributor
    schillaz wrote:
    Ok but i just pulled a cam out of a 49 and the numbers on that are 300022. Is that stock?



    Here are the numbers of my three cams if someone has a parts book.

    300022

    306344

    309742



    There has indeed been much discussion about stepdown cams, and some lift and duration information has been posted. If you have a micrometer, you should measure the lift of each of your examples and post it so we can continue to gather data on these cams. The 309742 has always been of great interest because it was originally made available as the first "flat top 7X" cam and became standard in 308s early in '54. It was discontinued through '55 apparently but reappeared in '56 with hydraulic lifters. Ads at the time announced that the '56 cam was of "an improved design". The '56 308 engine had the highest rated HP of any production 308, 175HP.
  • schillaz
    schillaz Expert Adviser
    Found this, and wanted to add to this thread:



    HUDSON CAM HISTORY: All Hudson engines come with the 306344 cam which became the standard low HP cam for Hudson in 1953. The 1954 Hudsons were delivered with the 309742 (7X) Flat Top cam and later in 1954 was replaced with the 306344A series cam. The 311040 cam (Super 7X high lift cam (.390 gross lift) came out in the fall of 1953 for all our Oval track racing and was listed as the severe use cam. The HP rating of the 308 standard engines equipped with twin H power and the 7.5 to 1 CR head using a 306344 cam is 155HP. When using the 309742 7x flat top cam the HP is 170 and when using the 311040 Super 7X cam the rating is 180HP.
  • [Deleted User]
    [Deleted User]
    schillaz wrote:
    Found this, and wanted to add to this thread:



    HUDSON CAM HISTORY: All Hudson engines come with the 306344 cam which became the standard low HP cam for Hudson in 1953. The 1954 Hudsons were delivered with the 309742 (7X) Flat Top cam and later in 1954 was replaced with the 306344A series cam. The 311040 cam (Super 7X high lift cam (.390 gross lift) came out in the fall of 1953 for all our Oval track racing and was listed as the severe use cam. The HP rating of the 308 standard engines equipped with twin H power and the 7.5 to 1 CR head using a 306344 cam is 155HP. When using the 309742 7x flat top cam the HP is 170 and when using the 311040 Super 7X cam the rating is 180HP.
    All have to remember, these parts were never in the engine when car was ordered. Came with the car in the trunk and had to be installed by the dealer or the service garage. This took Hudson off the hook if something happened with the engine. 7X parts never came on the car, for the same reason as above. Walt.
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