CAMSHAFT 304073 lift & duration needed

Unknown
Unknown
edited November -1 in HUDSON
Was wondering for the following two cams, what is the duration (s) and lift (s), if different for the following two cams:



304073



309742



ALSO, does anyone know what ENGINES these two cams were originally designed for and used in??



thanks

Comments

  • [Deleted User]
    [Deleted User]
    The 309742 is the factory 7X cam that was introduced in April of 1954 I think the lift is 391 and the duration is 268 it was called the flat top cam because of the lobe profile and it ate a lot of timing gears. It was made for the 308. It was quickly replaced by the 306344A which did not have the aggressive lift. I would send that cam to Randy Maas he can get it reground to get you the same lift with a better lobe profile. Or have him regrind it to his mechanical grind cam which is the best for performance and drivability on the street.

    I don't know the other cam does not show up against the 308 in my stuff, unless its after 54 and I don't have any info in that time period.
  • [Deleted User]
    [Deleted User]
    7x Cam Was 355 Lift--268 Duration. Super 7x Was 391-268 Duration. My 372 Lift 254 Duration Is Smooth Idle- Great Low End Power And Good Mileage. Have All In Stock--regrind Of The 391 & 372. Have Some Good Used 7x Cams Also.



    Randy
  • Unknown
    Unknown
    The 304073 CAMSHAFT is the one I pulled out of my 53 Hornet engine (it also had a 51-52 H-145 Aluminum head on it). So, although this eng only had about 35K miles on it someone had been making some changes, apparently.



    Surely someone has some info on the 304073 CAM; that number sounds very familiar to me but my research so far has not yielded anything.



    On Friday I drop the block and crank off for all the necessary things.



    Guess the thing to do is to take the 304073 CAM to the cam-doctor and let him diagnosis it to determine just what it is, or what's left of it, and go from there.



    Just thought one of you guru's would have that info. I know I've run across that cam # before some where!!!!!!!!!!!!!!!!!!!!!



    thanks for your feedback.
  • Unknown
    Unknown
    Here's a great link to: a reprint from Jack Clifford's Hudson parts catalog showing the various 1951-1956 Hudson six cylinder engines with stats on each.



    The table developed by Jack Clifford compares the various engine combos (202, 232, 262, 308, 308-7X) for both the aluminum and iron heads, and including displacements, compression ratios, GROSS CAM LIFT (0.356" for all surprisingly), valve sizes, cu in, bore, stroke, & horsepower, for years '51-56. What is missing are the durations v. all the cam ID's that they produced. Surely some of you Hudson enthusiasts have this info some where. If you can locate it and tabulate all of it herein that might be of great help in the future to those experimenting with cams or those who wish to restore to exact, original specs.



    Thanks for your feedback.



    http://groups.msn.com/HudsonTechnicalInformation/19511956hudson6partsinterchange.msnw





    Edit/Delete Message
  • Unknown
    Unknown
    I took the "304073" cam to Bullet Racing Cams, the new home of UltraDyne Racing Cams, currently housed in Olive Branch, MS, at a building with "Lunati & Taylor Pistons" painted on the front sign, if you can follow all of this. http://www.bulletcams.com/



    Having said all of that, a cursory bench check of the camshaft revealed the lifts measured VERY close to the original 0.356", and the duration is about 207+ degrees (duration assumed close to stock). It'll be refurbished to like-new specs at a cost of $ 125.oo. Sticking with a pure stocker, for smoothness and energy efficiency!!



    Again, if any of you fellows, like Alex, who perhaps have all the historical camshaft specs at hand wish to present the original specs on this cam, that would be good to have posted herein for future reference by other stocker re-builders.



    Thanks and HAPPY Easter!
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