Re: Who has broken a cast 440 crank?
[Re: jwb123]
#3007539
01/21/22 11:19 AM
01/21/22 11:19 AM
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Joined: Jan 2004
Posts: 8,294 fredericksburg,va
cudaman1969
master
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master
Joined: Jan 2004
Posts: 8,294
fredericksburg,va
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Police engines in late 70s had special cast cranks, got one, but my 74 cast crank engine was running 7.70s in my 64 Plym for a year or more before I changed to the steel crank engine. The 74 engine is now going in my Lil Red, maybe 15,000 miles on it. 5500 and both are done up top so that helps a lot, anything will break but I doubt you’ll have a problem btw mopar stocker racers search out for the cast cranks to run in their engines, lighter. 340s (use 318), 383s, 400s and 440s
Last edited by cudaman1969; 01/21/22 11:24 AM.
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Re: Who has broken a cast 440 crank?
[Re: 69dart]
#3007585
01/21/22 01:32 PM
01/21/22 01:32 PM
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Joined: Jan 2003
Posts: 17,879 S.E. Michigan
ZIPPY
I Live Here
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I Live Here
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S.E. Michigan
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In a basic 440 that I am planning to have fully machined, start from scratch and "build" (not just re-ring a stock cast crank engine), I'd rather go with a reworked stock forged crank if I can find a good one at reasonable cost. Not because the cast crank will break (it won't) but because "built/fully machined" means it will be balanced too. Personally I feel like I am cheating myself if we get all the components weight matched including the rods end for end, and then kind of wimp out at the end of the process by hanging a bunch of weight off the ends of the crankshaft because it's too light. It's more "ease of internal balance + easy parts interchangeability that follows" rather than any concerns the cast crank is going to break. However even if we're not machining much of anything, and we're not balancing anything either, we can still have some fun with a good old 440 regardless of what crankshaft is in it. https://board.moparts.org/ubbthreads/ubbthreads.php/topics/1235800/1.html
Rich H.
Esse Quam Videri
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Re: Who has broken a cast 440 crank?
[Re: AndyF]
#3007638
01/21/22 04:47 PM
01/21/22 04:47 PM
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Joined: Jun 2008
Posts: 3,916 usa
lewtot184
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i had a steel 440 crank and '73 cast 440 crank.. put them both on the bathroom scales and they weighed the same. i know it's not precise weighing but it was what it was .i wouldn't be afraid of a cast crank at a reasonable power level. reasonable is maybe 500hp to me.
Last edited by lewtot184; 01/21/22 04:50 PM.
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Re: Who has broken a cast 440 crank?
[Re: lewtot184]
#3007639
01/21/22 05:03 PM
01/21/22 05:03 PM
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Joined: Dec 2013
Posts: 4,689 Wichita
GY3
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Wichita
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i had a steel 440 crank and '73 cast 440 crank.. put them both on the bathroom scales and they weighed the same. i know it's not precise weighing but it was what it was .i wouldn't be afraid of a cast crank at a reasonable power level. reasonable is maybe 500hp to me. I've weighed both as well. 73 lbs. as I recall regardless of whether they are cast or forged.
'63 Dodge 330 11.19 @ 121 mph Pump gas, n/a, through the mufflers on street tires with 3.54's. 3,600 lbs. 10.01 @ 133mph with a 250 shot of nitrous an a splash of race gas. 1.36 60 ft. 3,700 lbs.
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Re: Who has broken a cast 440 crank?
[Re: GY3]
#3007671
01/21/22 06:23 PM
01/21/22 06:23 PM
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Joined: Jun 2008
Posts: 3,916 usa
lewtot184
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usa
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i had a steel 440 crank and '73 cast 440 crank.. put them both on the bathroom scales and they weighed the same. i know it's not precise weighing but it was what it was .i wouldn't be afraid of a cast crank at a reasonable power level. reasonable is maybe 500hp to me. I've weighed both as well. 73 lbs. as I recall regardless of whether they are cast or forged. that sounds about right to me. i didn't think they were that heavy but seen no difference in weight.
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Re: Who has broken a cast 440 crank?
[Re: GY3]
#3007695
01/21/22 07:50 PM
01/21/22 07:50 PM
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Joined: Feb 2016
Posts: 201 PA
Scully
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Posts: 201
PA
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i had a steel 440 crank and '73 cast 440 crank.. put them both on the bathroom scales and they weighed the same. i know it's not precise weighing but it was what it was .i wouldn't be afraid of a cast crank at a reasonable power level. reasonable is maybe 500hp to me. I've weighed both as well. 73 lbs. as I recall regardless of whether they are cast or forged. I weighed a 383 steel, 400 cast, 440 steel and 440 cast, all 4 were 76 lbs.
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Re: Who has broken a cast 440 crank?
[Re: Scully]
#3007704
01/21/22 08:17 PM
01/21/22 08:17 PM
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Joined: Jan 2005
Posts: 12,419 Kalispell Mt.
HotRodDave
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I Live Here
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Kalispell Mt.
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If this is true then it begs a couple questions...
1. Why do the SS racers run them?
2. Why did they require weight added on both ends of the crank to get them to balance with the same rods and pistons as a forged crank?
Maybe it's only 1/2 pound and the less weight is worth it like a thousand other tiny seemingly insignificant things the SS racers do.
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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