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440 and 413 steel cranks
#803307
09/16/10 07:35 PM
09/16/10 07:35 PM
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Joined: Apr 2010
Posts: 398 Texas
70Runnerdude
OP
enthusiast
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OP
enthusiast
Joined: Apr 2010
Posts: 398
Texas
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Is there a difference between a 440 steel crank and a 413 steel crank I have one of each in the garrage and they seem to be the same even the numbers on the crank. Not sure on this one ???? Thanks! Dave
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Re: 440 and 413 steel cranks
[Re: JohnRR]
#803310
09/16/10 08:57 PM
09/16/10 08:57 PM
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Anonymous
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Anonymous
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Quote:
Depends on the year I guess, pics posted of early cranks had an extra chunk of metal on the rod throws. Balance will be different , not sure how much lighter a 413 piston is vs a 440 but there is a very large difference in bore size , .195 .
4.32 - 4.1875 = .1325
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Re: 440 and 413 steel cranks
#803313
09/17/10 09:39 AM
09/17/10 09:39 AM
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Joined: Jan 2003
Posts: 75,047 U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 75,047
U.S.S.A.
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Quote:
Quote:
Depends on the year I guess, pics posted of early cranks had an extra chunk of metal on the rod throws. Balance will be different , not sure how much lighter a 413 piston is vs a 440 but there is a very large difference in bore size , .195 .
4.32 - 4.1875 = .1325
I thought the bore size was 4.125
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Re: 440 and 413 steel cranks
#803316
09/17/10 11:21 AM
09/17/10 11:21 AM
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Anonymous
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Anonymous
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Here's a six-bolt regular-flange 413 forged crank next to a 440 forged crank. I have no idea if the balance is different, but you will notice that every rod throw on the 413 crank (on the left) has a tab on it; the 440 crank has none.
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Re: 440 and 413 steel cranks
#803317
09/17/10 11:23 AM
09/17/10 11:23 AM
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Joined: Jan 2003
Posts: 25,200 Upper Midwest
MoparforLife
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 25,200
Upper Midwest
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Quote:
Later 413 cranks (easy to ID because they have 6 bolt holes in the flange) were basically identical to a 440 crank.
These are the ones that I referred to when I stated that countless of these were interchanged on 440's with no ill effects.
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