Welcome, Guest. Please login or register.
April 17, 2014, 08:32:45 am

Login with username, password and session length
408072 Posts in 34887 Topics by 8656 Members
Latest Member: 94efiVictor
Search: Advanced search
Advertiser Inquiries
+ SBFTECH.com Experienced Small Block Ford Tech
|-+ Grass Roots Tech
| |-+ Grass Roots Other Ford Engines
| | |-+ 351c Crankshaft Casting Number
0 Members and 1 Guest are viewing this topic. « previous next »
Pages: [1] Go Down Print
Author Topic: 351c Crankshaft Casting Number  (Read 4612 times)
Mww460
6 Banger
**
Offline Offline

Posts: 80


Location: Birmingham, AL

« on: May 06, 2010, 04:47:10 pm »

Where is the casting number located on a 351c crank. Thanks
Logged

1993 Mustang LX with a soon to be 393w, 5 speed
jtmustang
Adv_SBFTechie
Big Block
****
Offline Offline

Posts: 3809

Location: arlington , washington

« Reply #1 on: May 06, 2010, 05:13:14 pm »

well it is  really not a casting number per say but.... it should be marked as    "4m"  (70'-74')  and the high output and boss cranks were marked  "4Ma"

on the first counterweight..if my memory serves me right..
Logged
Mww460
6 Banger
**
Offline Offline

Posts: 80


Location: Birmingham, AL

« Reply #2 on: May 08, 2010, 06:23:13 pm »

Thanks for the help. It is the 4MA with a B under that. Is there any difference in the 4MA-B and 4MA.
Logged

1993 Mustang LX with a soon to be 393w, 5 speed
jtmustang
Adv_SBFTechie
Big Block
****
Offline Offline

Posts: 3809

Location: arlington , washington

« Reply #3 on: May 08, 2010, 07:25:04 pm »

Thanks for the help. It is the 4MA with a B under that. Is there any difference in the 4MA-B and 4MA.

no problem...and dont know about the B ion there?..ill do some digging around or maybe someone else knows.. Grin

and if no one else has said it yet.... Welcome..... ....and be sure to add your location into your profile screen for us... Wink

thanx
jason
Logged
xdclevo
Small Block
***
Offline Offline

Posts: 108


Location: Queensland, Australia

« Reply #4 on: May 08, 2010, 08:17:44 pm »

Thanks for the help. It is the 4MA with a B under that. Is there any difference in the 4MA-B and 4MA.

I have heard some say the B is Brinell Hardness tested, but i have no idea if this is correct or not. I have never used the 4MA type crank, just the std ones with "351" cast into it, and some over this way prefer them over the 4MA. In my opinion, they are all the same in strenth from over the years whith people i know running both types.
Logged

Trusty old Cleveland, AFD 2V heads, TFC Manifold, 750DP.
C4, 4500 eight inch convertor.
Comp Cams Solid
10.74 @ 125MPH
3550 Pound 4 door Aussie Falcon
jtmustang
Adv_SBFTechie
Big Block
****
Offline Offline

Posts: 3809

Location: arlington , washington

« Reply #5 on: May 08, 2010, 08:20:16 pm »

 
Quote

I have heard some say the B is Brinell Hardness tested, but i have no idea if this is correct or not.

lol...i was just typing this as i looked in a few of my books and it said the same...
Logged
Mww460
6 Banger
**
Offline Offline

Posts: 80


Location: Birmingham, AL

« Reply #6 on: May 08, 2010, 08:36:36 pm »

thanks for the info
Logged

1993 Mustang LX with a soon to be 393w, 5 speed
DragBoss
6 Banger
**
Offline Offline

Posts: 50


Location: Canal Winchester, Ohio

« Reply #7 on: May 15, 2010, 02:48:24 pm »

The B on the crank does mean Brinell test or the Brinell mark. I had a Boss 351 crank, I just sold and it had the Brinell mark, which is really a couple of dots punched into the counter weights. So I was told by the knowledgable purchaser...Tim
Logged

Tim
Hayden123
Stroked Small Block
****
Offline Offline

Posts: 385

Location: New Zealand

« Reply #8 on: May 18, 2010, 07:42:59 pm »

I was under the impression the AB was just a revision number as its cast into the crank. How could it be Brinell tested before it was cast?  As Dragboss said, the witness mark of the test is a shiny spot with a punch mark.
Logged
xdclevo
Small Block
***
Offline Offline

Posts: 108


Location: Queensland, Australia

« Reply #9 on: May 19, 2010, 05:34:14 am »

I was under the impression the AB was just a revision number as its cast into the crank. How could it be Brinell tested before it was cast?  As Dragboss said, the witness mark of the test is a shiny spot with a punch mark.

Well, ofcourse the crank was cast first.. haha. As you know, the 4MA is not 'cast' into the crank anyway.
Logged

Trusty old Cleveland, AFD 2V heads, TFC Manifold, 750DP.
C4, 4500 eight inch convertor.
Comp Cams Solid
10.74 @ 125MPH
3550 Pound 4 door Aussie Falcon
Hayden123
Stroked Small Block
****
Offline Offline

Posts: 385

Location: New Zealand

« Reply #10 on: June 27, 2010, 06:30:31 pm »

Here's a 5MAB crank?  Must have been "tested" for those Boss 400's   

Logged
Pages: [1] Go Up Print 
« previous next »
Jump to:  



Powered by MySQL Powered by PHP Valid XHTML 1.0! Valid CSS!
Powered by SMF 1.1.18 | SMF © 2013, Simple Machines



408 Stroker