306344 camshaft just profiled

Kdancy

Here for your cam profile experts! Just got the back from Crane cams who I had profile a Hudson 306344 camshaft
I sent them for re-grind.
 So far here are the Crane results of two Hudson cam profiles and three Crane - Hudson profiles-

RL Chilton

Well, that's cool.  

BillUSN1

Did they give an advertised duration? I didn't see it.

Lift looked a little smaller than I would have thought.

Kdancy

Bill, this was a factory Hudson cam that I had them to give me it's profile.

BillUSN1

That's what I put in my 262 from my 54 308.

I didn't see the advertised duration listed and they didn't do a duration @ .050 like most cams are listed.

Just trying to get an idea of it's size.

Kdancy

Bill, I added to the first post and also sent Robert a note for more info.

Robert Freund

866-388-5120 Ext. 4474   386-506-0327 (Direct)386-236-9983 (Fax)rfreund@cranecams.comwww.cranecams.com

1830 Holsonback Drive, Daytona Beach, FL 32117

BillUSN1

These are the cams that Randy has listed.

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

I assume the 55-56 cam is based on the 742/040 cam.

Ol racer

FYI

Not all #309742 Cams are alike.I understand that Hudson utilized their stock pile of 309742 Cam Blanks for the '55 & '56 Motors grinding 'Hydraulic Ramps' to utilize Hyd lifters because of tight Nash inner fender wells & Suspension.....

 Grinds for the '55 & '56 #309742 is also milder than the earlier Cams that did Increased Performance. Additionally, I read that you should Not use Solid Tappets on the '55 & '56 Hyd Cams.

I believe Ivan Zeremba did the earlier research by having several #309742 Cams profiled discovering all the differences between them then he Posted the results on the old Forum....Im not sure if its accessable now.

I understand the only way one can tell the real Performance #309742 Cam is by its 'Flat Top'....

Kdancy

added more info to first post--

Kdancy

info from the net-

A brief discussion of the
cams offered and what effect they have will be helpful in deciding which build
of 7X to aim for.

Standard factory cam for Hudson engines 232,262 and 308 is 306344 lift is 356

Designated Super 7X cam introduced in fall of 53 was 311040 lift 390 duration
268 rough idle lobey exhaust note.

Designated 7X FlatTop introduced in april of 54 309742 lots of customer
complaints about this cam. Trouble setting up and ate timing chains. Was
replaced later in 54 with the 306344A series cam. I do not have lift and
duration for these cams yet.

Clifford designated 1956 mechanical grind cam which has a lift of 376 and a
duration of 254 and is considered the best cam choice as its super smooth and
has power, nice to setup and none of the roughness at idle of the other cams.
With Twin H and 262 head will give you 176 hp with 7X engine relief and 7X
valves around 185-200.

ivanz62 Expert Adviser

October 2013

A lot of bad info on this
topic of cams. All the stepdowns had pretty much the same cam

From 1948 to 1954 with the exception of the racing cams that were dealer or
owner installed.

344A in 1954 is very
little changed from 344 in all earlier Hornet engines.

The 742 and 040 cams were
for racing with the 040 replacing the "chain stretcher" 742 as the
choice in late 1953 or 1954.

In 1956 the 308 came with
hydraulic lifters and a somewhat higher performance cam--this gave 170 BHP with
Twin H and aluminum 7.5:1 compression head. Aftermarket cam grinders made a
solid lifter equivalent of this 1956 hydraulic grind.

BillUSN1

Found these specs listed in the Clifford catalog.

Kdancy

Delete

Kdancy

delete

BillUSN1

Here the specs of my regrind.

Started with a 742, this is supposed to be a super 7X GRIND.

I'm still trying to wade thru the numbers to decide what it's close to.