Identify crankshaft.Cast or forged?
Thread Starter
Le Mans Master
Joined: Aug 2000
Posts: 8,838
Likes: 31
From: Australia
Identify crankshaft.Cast or forged?
Seem to recall where visible, cast crank had narrow line and forged had wide line.
How do you tell whether a crank is cast or forged if it has been polished so no casting / forging marks are visible?
Scat crank
How do you tell whether a crank is cast or forged if it has been polished so no casting / forging marks are visible?
Scat crank
Team Owner
Joined: Oct 2004
Posts: 81,241
Likes: 3,062
From: altered state
St. Jude Donor '05
Scat makes forged cranks. THere is a way to tell by the pitch of the ring if you tap a couterweight with a hammer. One is higher pitched than the other (cast vs. forged). Can't remember which is which.
Thread Starter
Le Mans Master
Joined: Aug 2000
Posts: 8,838
Likes: 31
From: Australia
Yep , part # starting with "9" are cast steel ,
ones with 4,5 ,7 from memory are forged,Different types , weights mainly.
As in 4-350-3750-5700-L for a forged 383 stroker crank to suit 5,7 rod and late 1 pce seal.
The same # with a "9" is a cast crank of the same specs
ones with 4,5 ,7 from memory are forged,Different types , weights mainly.
As in 4-350-3750-5700-L for a forged 383 stroker crank to suit 5,7 rod and late 1 pce seal.
The same # with a "9" is a cast crank of the same specs
Drifting
Joined: Feb 2002
Posts: 1,952
Likes: 2
From: Little Rock Arkansas
Originally Posted by cuisinartvette
Scat makes forged cranks. THere is a way to tell by the pitch of the ring if you tap a couterweight with a hammer. One is higher pitched than the other (cast vs. forged). Can't remember which is which.
-Jeb
Melting Slicks
Joined: Jun 2004
Posts: 3,032
Likes: 4
Originally Posted by jburnett
A forged crank will ring like a bell... Cast cranks just have a dull "clank." The "parting line" is the thin line on visible on the counterweight on cast crankshafts; it's where the two halves of the mold fit. Forged cranks usually have a very wide, parting line if any at all.
-Jeb
-Jeb
I think forged and cast cranks both 'ring like a bell.' ...
http://forums.corvetteforum.com/show...nk&forum_id=48
Drifting
Joined: Feb 2002
Posts: 1,952
Likes: 2
From: Little Rock Arkansas
Originally Posted by mikey whipreck
I think forged and cast cranks both 'ring like a bell.' ...
http://forums.corvetteforum.com/show...nk&forum_id=48
http://forums.corvetteforum.com/show...nk&forum_id=48
-Jeb
Last edited by jburnett; Aug 5, 2005 at 06:54 PM.
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Joined: Sep 2000
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From: The Top of Utah
Originally Posted by jburnett
No, I can assure you they do not...
-Jeb
-Jeb
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Le Mans Master
Joined: Jul 1999
Posts: 8,683
Likes: 6
From: Phoenix AZ
Originally Posted by REW89
S0 which is stronger? Cast? I assume thast since the last forged cranks were in the old 82 smoggers, cast must be better?
Bob
Bob
