Cam Specs? Engine MFR Dates?

vmike

Is there published a chart that gives the cam specs for hudson cams by part number? I've done a bit of searching on the internet and hudson boards and come up with lift and duration for two hudson cams and three maas cams. The cam I pulled out of my junkyard 308 and currently curious about is 304078.



I have the same kind of question about where to find the manufacture dates of engines by serial number. Done some searching of the net and hudson boards, the few hudson manuals and service books from the epoc, no joy. My junkyard (practice) engine is 132181, the twin h engine I pulled out of the 53 hornet is 230678, and a 262 I bought to use as a test bed/display engine is 50180918. The engine out of the hornet is red with about an eight inch relief cut, as is the junkyard engine and from what I've read the hornet engine for 53 should have been gold. The 262 I'm just curious about.



I am interested in having these data charts if they are available. Can someone point me to a source?



mike

Edwardjohnsr

I don't have the cam specs but I also have a 53 Hornet with a red engine. The VIN number is correct for a 53 (it starts with 7C). I suspect there were more red 53 engines.

Ed

Unknown

After 40/60 years they are likely to be any color. I have a engine and od trans came out of a 46 super six convt all painted pea green. Repainted a 51 232 that was bright ford blue.

Unknown

vmike wrote:

Is there published a chart that gives the cam specs for hudson cams by part number? I've done a bit of searching on the internet and hudson boards and come up with lift and duration for two hudson cams and three maas cams. The cam I pulled out of my junkyard 308 and currently curious about is 304078.



I have the same kind of question about where to find the manufacture dates of engines by serial number. Done some searching of the net and hudson boards, the few hudson manuals and service books from the epoc, no joy. My junkyard (practice) engine is 132181, the twin h engine I pulled out of the 53 hornet is 230678, and a 262 I bought to use as a test bed/display engine is 50180918. The engine out of the hornet is red with about an eight inch relief cut, as is the junkyard engine and from what I've read the hornet engine for 53 should have been gold. The 262 I'm just curious about.



I am interested in having these data charts if they are available. Can someone point me to a source?



mike

For your use









The following bulletin was taken from Ken Cates Stepdown Restoration Website:



S-553 dated 2-9-54



TO ALL DEALERS AND SERVICE STATION AGREEMENT HOLDERS:



We have available for Models 4D, 5D and 7D an EXTRA High PERFORMANCE CAMSHAFT, part C 311040. It was originally announced to Zones, Distributors, and Dealers on General Parts Policies and Information Bulletin 54-2, 1954 Series, dated August 27, 1953.



The NEW CAMSHAFT may be used to replace C 306344 standard production Camshaft for Models 4C, 5D and 7D, or C 309742 standard product ion Camshaft for Models 4D, 50 and 7D. C 309742 is also the standard production Camshaft for the 7X EXTRA High PERFORMANCE ENGINE offered for 1951, 1952, 1953 and 1954 models.



The price schedule of the new Camshaft follows.



Part No. - Name List Price Whlse. Net Dealer Net

C 311040 Camshaft 32.50 26.65 21.78



It is not possible to install this Camshaft in production; however, it will be shipped with the new car for field installation or installed at the Factory Service Garage at established flat rate charges.



When ordering for a new car, send a Parts Order to Fur Zone or Distributor covering the Camshaft specifying whether it is to be shipped for field installation or installed by the Factory Service Garage. It will be billed on a regular Parts Invoice.



C. J. Perrin

Parts Specification Division

Service Department

mars55

Well, as far as cams go the Parts Manual only lists three cams: Part No. 306344 '48 - '53 Six, Part No. 306344A '54 Six and Part No. 311040 '51 - '54 (Severe Usage ) Six.



We have better luck on dating your engines.



262 built May 1950



Practice Engine built October 1951



'53 Hornet Engine built March 1953

vmike

Parts manual, okay there's one I need to order. Thanks for the manufacture dates. No one has seen any actual specs published on the cams?



Thanks, mike

Unknown

I too have one of these cams, as well as a '55-'56 308 crank that I need to get rid of, as well as some other Hudson engine parts, anyone interested?

hudsontech

Mike

I have the manufacture dates by serial number (car and engine numbers are the same).

If you go to my website @ www.freewebs.com/hudsontech you can find this listing under "Miscellaneous Technical Information" - open the link and scroll down.



Hudsonly,

Alex Burr

HudsonTech

Memphis,TN

dougson

The cam I pulled out of my junkyard 308 and currently curious about is 304078.



IMy junkyard (practice) engine is 132181



mike[/QUOTE]



I've been doing some research on stepdown camshafts and regarding standard factory cams, there is some conflicting information. Most of the information on these cams comes from this website and the restoration website. Most print literature lists the standard '51-53 cam as the 306344, .356 lift, somewhere around 254 deg. duration. Two other cams have surfaced, the 304073 and the 304078 and possibly one other that I am still researching. The 073 has been found in '53 Hornet cars and has been measured, .356 lift, duration unclear. The 078, like yours, seems to have been found in '51 308s', I have no lift or duration info. It would be helpful if we had every example with a specific Hudson number spec'd and provide a table like the Clifford example in the restoration website, which in its current form is very inaccurate regarding cams.

RL Chilton

dougson wrote:

The cam I pulled out of my junkyard 308 and currently curious about is 304078.



IMy junkyard (practice) engine is 132181



mike

I've been doing some research on stepdown camshafts and regarding standard factory cams, there is some conflicting information. Most of the information on these cams comes from this website and the restoration website. Most print literature lists the standard '51-53 cam as the 306344, .356 lift, somewhere around 254 deg. duration. Two other cams have surfaced, the 304073 and the 304078 and possibly one other that I am still researching. The 073 has been found in '53 Hornet cars and has been measured, .356 lift, duration unclear. The 078, like yours, seems to have been found in '51 308s', I have no lift or duration info. It would be helpful if we had every example with a specific Hudson number spec'd and provide a table like the Clifford example in the restoration website, which in its current form is very inaccurate regarding cams.[/QUOTE]



Some additional info after checking MPC '48-'54:



306344 is listed as stock cam for the following:

1948: Super 6, Com 6

1949: Super 6, Com 6

1950: PM, PMD, Com 6

1951: PM, Suer 6, Com 6, Hornet

1952: same as '51

1953: Wasp, Super Wasp Hornet



I checked the Clifford Catalog back when he was actually make a store of parts:



"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. Our new 1956 mechanical grind cam has a HP rating of 170."



Haven't found any info on the 304078 as of yet. Alex Burr says he has no information on cam specs, as such. Someone like Randy or Russ Maas can probably fill in the missing blanks.

Unknown

Well, I too have one of the 304078 cams so they must have been relatively common. I'm just curious as to if they're worth anything before I put it on ebay.

RL Chilton

Well, I'd definitely contact Randy Maas and see if he has any additional info.

Unknown

And how does one do that?

dougson

Turbopackman wrote:

Well, I too have one of the 304078 cams so they must have been relatively common. I'm just curious as to if they're worth anything before I put it on ebay.

Do you know what year and make of Hudson your 078 came out of?

Unknown

Not anymore, this is in the huge pile of Hudson parts I'm trying to get rid of that no one seems to want.

RL Chilton

Go here and send them an e-mail:



http://21stcenturyhudson.net/

RL Chilton

If someone can look up the Nov/Dec. '83 WTN, there's an article in there by George Schmidt about camshafts.



I'd look it up, but my WTN's only go back to mid-'85.

Kdancy

delete

Ol racer

FYI

I found a 304078 Cam in a Hornet Motor that I bought too. It apeared to have never been apart. I never seen that niumber before so inquired on the Forum at that time and learned it was a 262 cam. Apparently, Hudson used up some 262 cams in the early run of Hornets with so many discovered lately(?)
Personally, the Car is less lively than a car I have with identical compression, gear ratio, and weight .... Speaking from experience, I regret using it if that says anything....

ivanz62

Unfortunately, the number cast in the cam does not positively identify which cam you have. The cam casting blanks were ground by Hudson to suit what production required as the end of Hudson came nearer. The 309742 cam blank is the best example. I have examples of this number as the 7X Flat Top high performance cam, as the standard 306344 cam, and as the1956 hydraulic lifter cam. When the Flat Top cam was discontinued and replaced with the Super 7X 311040, they started grinding what they needed on the inventory of 309742 castings.

In the early step-down years, the casting number was indeed the cam grind. The strangest thing is that using the most sophisticated measuring technology, we cannot see a difference between 306344 and the 306344A that replaced it!

[Deleted User]

Might just be a change in the metal for longer life ?

ivanz62

Possible, I guess. Would be very interesting to know. All the cam castings were done by CWC whose logo is cast into the cams. The are still in business making parts for what is left to manufacture. About five years ago, I tried pretty hard asking for back door favors to get an actual engineering drawing of the Hudson cam from CWC because of the need to have blank billet steel cams made for my Bonneville project. they claimed to have it and to be unable to dig the drawing up from the archives. Instead, we reverse-engineered the drawing from Buzz Stahl's NOS Super 7X 311040 cam. Made 8620 steel billets with larger cam bearings and larger base circles for the lobes.

Kdancy

12/2014
Just received a note from Bob at Crane Cams, regarding the 304078 I sent them for profiling and re-grinding--

Hello Kerry, the engineering department profiled the stock cam you sent. The Duration @ .050 is 210 degrees, intake and exhaust. The cam /valve lift is .353 intake and exhaust. The cam is ground on a 113 lobe separation. I noticed you showed the advertised duration on the Crane Cams grinds. Those numbers are not of a comparable value because they are not taken at the same lift. There is no industry standard as to where the advertised duration is taken so it is not a comparable number.

Hudson cam grinds listed available---
1955-1956 Mechanical Cam: 372 lift, 254 duration
Super 7X Cam: 391 lift, 268 duration
Super Street Cam: 402 lift, 276 duration
Race cam is Isky: 446 lift, 280 duration

Crane Cams – grinds they sent to me-
(1) F-228-350-12 cam grind 001
350 lift and 254 duration
(2) F-268/476-6
470 lift and 300 duration
(3) F-260/450-12
450 lift and 306 duration

Hudson stock cam pulled from 51 308
#304078 = .353 lift and 210 duration at .050 ****see note above
  camshaft # 306344 cam which became the standard low HP cam for Hudsons in '53
   camshaft # 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.

ivanz62

Kerry,
What is the cost to have Crane redo your cam?

Kdancy

126.00
S&S, The same guys that build the motorcycle engines, are the owners and seem to be excellent to deal with. Very happy to help and answer questions.