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Re: 3.58" crank
[Re: Crizila]
#1141602
12/22/11 12:44 PM
12/22/11 12:44 PM
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Joined: Aug 2003
Posts: 3,245
Between a rock & a hard place
cudadoug
master
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master
Joined: Aug 2003
Posts: 3,245
Between a rock & a hard place
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What's the intended use? For a 90% street car, a cast (MP/SCAT) crank will be fine. But if I were going to race one, I'd have it INTERNALLY balanced vs. external. Then you might as well take the money you're going to spend balancing and get the forged piece to begin with.
Last edited by cudadoug; 12/22/11 08:21 PM.
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Re: 3.58" crank
[Re: 416challenger]
#1141606
12/23/11 12:45 AM
12/23/11 12:45 AM
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Joined: Apr 2003
Posts: 799
north west LA
W2DODGE
super stock
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super stock
Joined: Apr 2003
Posts: 799
north west LA
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Nothing wrong with a stock crank. I made upwards of a thousand 10.60 passes in my 3,000 lb dart before it went into my buddies car for several seasons he spun a rod bearing not the cranks fault. I have also run cast 318 cranks in the same car in the 11.10 10.90 range.
Last edited by W2DODGE; 12/23/11 12:47 AM.
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Re: 3.58" crank
[Re: Rapid340]
#1141611
12/23/11 01:27 PM
12/23/11 01:27 PM
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Joined: Jul 2009
Posts: 413
Norway (old world)
Oyvind Mopar
mopar
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mopar
Joined: Jul 2009
Posts: 413
Norway (old world)
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Quote:
Density is increased by the forging process itself, even the cast steel cranks are lighter. Rotating weight can be a great place to go on a diet and often costs less than free. 
Is that correct? I do not think the density is much different if cast or forged, however, I am not so sure the socalled Cast steel cranks are really that!! Steel is difficult to cast, but iron is simple, and some people say their nodular cast iron cranks are cast steel!! 4% carbon make them all lighter than steel by appx 5%.
If the Scat 4" stroker cranks really was cast steel (I think I read so) I would buy them right away at 300$, or any comments??? 
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Re: 3.58" crank
[Re: Oyvind Mopar]
#1141612
12/23/11 02:18 PM
12/23/11 02:18 PM
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Joined: Sep 2004
Posts: 2,091
oberlin, Ohio
Rapid340
top fuel
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top fuel
Joined: Sep 2004
Posts: 2,091
oberlin, Ohio
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Quote: Quote:
Quote:
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Density is increased by the forging process itself, even the cast steel cranks are lighter. Rotating weight can be a great place to go on a diet and often costs less than free.
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Is that correct? I do not think the density is much different if cast or forged, however, I am not so sure the socalled Cast steel cranks are really that!! Steel is difficult to cast, but iron is simple, and some people say their nodular cast iron cranks are cast steel!! 4% carbon make them all lighter than steel by appx 5%.
If the Scat 4" stroker cranks really was cast steel (I think I read so) I would buy them right away at 300$, or any comments???
I would think that forging anything could increase its density but if that is not the case I stand corrected. I went to the scat website and they refer to the cast cranks as "CAST PROCOMP" but dont call them cast steel anywhere I can see. I think they have been advertised as cast steel ( by resellers? ) in the past and "cast 9000 series". Scat shows the weight of the SB mopar cast crank as four pounds less than the their 4340 forged crank (56lbs vs. 60lbs). Maybe these things being true cast steel is a myth.
1971 Factory Appearing Duster 340 11.000 @ 122 mph
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Re: 3.58" crank
[Re: Oyvind Mopar]
#1141614
12/24/11 10:15 AM
12/24/11 10:15 AM
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Joined: Jan 2003
Posts: 16,123
Grand Haven, MI
patrick
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,123
Grand Haven, MI
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Quote:
Quote:
Density is increased by the forging process itself, even the cast steel cranks are lighter. Rotating weight can be a great place to go on a diet and often costs less than free.
Is that correct? I do not think the density is much different if cast or forged, however, I am not so sure the socalled Cast steel cranks are really that!! Steel is difficult to cast, but iron is simple, and some people say their nodular cast iron cranks are cast steel!! 4% carbon make them all lighter than steel by appx 5%.
If the Scat 4" stroker cranks really was cast steel (I think I read so) I would buy them right away at 300$, or any comments???
no it's not unless the cast billet the forged crank is shaped from has serious voids....
steel casting isn't too tough, one of our customers does it all the time....
if a "cast steel" crank of the same dimensions is significantly lighter than a forged crank with the same volume of material, it's actually nodular (ductile) iron...where steel is the continuous phase, and there's spherical nodules of carbon dispersed throughout.
1976 Spinnaker White Plymouth Duster, /6 A833OD
1986 Silver/Twilight Blue Chrysler 5th Ave HotRod **SOLD!***
2011 Toxic Orange Dodge Charger R/T
2017 Grand Cherokee Overland
2014 Jeep Cherokee Latitude (holy crap, my daughter is driving)
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Re: 3.58" crank
[Re: W2DODGE]
#1141615
01/13/12 02:36 PM
01/13/12 02:36 PM
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Joined: Oct 2003
Posts: 21,345
Marysville, O-H-I-O
70Cuda383
Too Many Posts
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Too Many Posts
Joined: Oct 2003
Posts: 21,345
Marysville, O-H-I-O
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Quote:
I just got done skinning some big old swamp rabbits they aint got them on the left coast or road kill gumbo.
Quote:
Quote:
Nothing wrong with a stock crank. I made upwards of a thousand 10.60 passes in my 3,000 lb dart before it went into my buddies car for several seasons he spun a rod bearing not the cranks fault. I have also run cast 318 cranks in the same car in the 11.10 10.90 range.
LA as in Cajun country? Or LA as in Hollywood?
I know a guy from Louisiana that said he had some quick 318s. Coincidence?
Just saw the reply, How's retirement treating you Sherred?!
It's me, your favorite LT who was building the big block Dakota, was your Flt commander back in 05-06 time frame
(Ok, I assumed a little, might not have been your "favorite" Lt!)
**Photobucket sucks**
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Re: 3.58" crank
[Re: patrick]
#1141616
01/13/12 02:56 PM
01/13/12 02:56 PM
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Joined: Aug 2004
Posts: 2,128
sweden
sshemi
top fuel
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top fuel
Joined: Aug 2004
Posts: 2,128
sweden
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Quote:
Quote:
Quote:
Density is increased by the forging process itself, even the cast steel cranks are lighter. Rotating weight can be a great place to go on a diet and often costs less than free.
Is that correct? I do not think the density is much different if cast or forged, however, I am not so sure the socalled Cast steel cranks are really that!! Steel is difficult to cast, but iron is simple, and some people say their nodular cast iron cranks are cast steel!! 4% carbon make them all lighter than steel by appx 5%.
If the Scat 4" stroker cranks really was cast steel (I think I read so) I would buy them right away at 300$, or any comments???
no it's not unless the cast billet the forged crank is shaped from has serious voids....
steel casting isn't too tough, one of our customers does it all the time....
if a "cast steel" crank of the same dimensions is significantly lighter than a forged crank with the same volume of material, it's actually nodular (ductile) iron...where steel is the continuous phase, and there's spherical nodules of carbon dispersed throughout.
???
A forged thing is heavier then a cast thing.
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