Previous Thread
Next Thread
Print Thread
Page 2 of 2 1 2
Re: Who has broken a cast 440 crank? [Re: lewtot184] #3007759
01/22/22 12:22 AM
01/22/22 12:22 AM
Joined: Jan 2004
Posts: 6,232
fredericksburg,va
C
cudaman1969 Offline
master
cudaman1969  Offline
master
C

Joined: Jan 2004
Posts: 6,232
fredericksburg,va
Got me thinking, I’ll weigh the ones I have tomorrow.

Re: Who has broken a cast 440 crank? [Re: cudaman1969] #3007773
01/22/22 04:24 AM
01/22/22 04:24 AM
Joined: Aug 2003
Posts: 39,264
Bend,OR USA
C
Cab_Burge Offline
I Win
Cab_Burge  Offline
I Win
C

Joined: Aug 2003
Posts: 39,264
Bend,OR USA
I saw one of my forged steel 440 cranks broken on a press, it had spun a rod bearing and it was bent . The crank repair company put it in the press and was in the process of straightening it before working onit an BANG, it broke at one of main bearing to rod throws whiney
I did have a customer who had cast crank in a 454 Chevy 1 ton crew cab ranch truck break a crank in SO CA about 60 miles from home and drove it home and around 25 miles back into town to a repair shop, the shop brought me the motor to rebuild is how eI know it was broken and driven that way shruggy


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: Who has broken a cast 440 crank? [Re: Cab_Burge] #3007777
01/22/22 07:25 AM
01/22/22 07:25 AM
Joined: Nov 2020
Posts: 348
Isle of Sheeps
Gtxxjon Offline
enthusiast
Gtxxjon  Offline
enthusiast

Joined: Nov 2020
Posts: 348
Isle of Sheeps
Seen a few broken forged cranks, but never a cast one?

My mates 70 R/T Charger was driving around with a totally sheared crank.
It made a strange rattling noise but seemed OK?

I’ve also seen a hemi Barton 572 crank in three pieces too.
That didn’t run too good though... spank

But some folks do run cast as they is lighter and are not prone to breakage.
Where the limit is, we may never know.
Too many steel cranks around for big blocks, unlike Ford guys... fan

If you read about the 360 small block guys, they love ‘em lol... drive

I saw a dropped valve 360 engine that was destroyed and the crank was fine... drinking

Last edited by Gtxxjon; 01/22/22 07:27 AM.

Carpe diem, quam minimum credula postero, thanx Horace!

There’s no point trying to fix stuff that ain’t broke,,, 'but if ain’t broke',,, you is not trying hard enough...
Re: Who has broken a cast 440 crank? [Re: Gtxxjon] #3007787
01/22/22 09:32 AM
01/22/22 09:32 AM
Joined: Jun 2008
Posts: 3,699
usa
L
lewtot184 Offline
master
lewtot184  Offline
master
L

Joined: Jun 2008
Posts: 3,699
usa
i have a friend who was a ford racer and ford steel cranks are rare. He used cast cranks without issue but thought that limiting rpm was the key to longevity. i have noticed that some cast cranks have fillets, which is good, but mopar doesn't.

Re: Who has broken a cast 440 crank? [Re: lewtot184] #3007849
01/22/22 01:25 PM
01/22/22 01:25 PM
Joined: Jan 2004
Posts: 6,232
fredericksburg,va
C
cudaman1969 Offline
master
cudaman1969  Offline
master
C

Joined: Jan 2004
Posts: 6,232
fredericksburg,va
On the scales just now, bathroom scale but high quality, each crank set in the same spot on scale twice.

Cast 440-67 pounds
Stock steel 440- 69 pounds
Stock Hemi been worked, out of a S/S 68 pounds
Kellogg Hemi with mallory 75 pounds
Ohio 4.15 73 pounds
Ohio 4.5 73-74 pounds
KB stock stroke blower crank 74 pounds

Have a 6 pac crank but was in garage and didn’t measure it (been internally balanced)
You numbers may come up different but they were all relative to each other

Re: Who has broken a cast 440 crank? [Re: lewtot184] #3007850
01/22/22 01:33 PM
01/22/22 01:33 PM
Joined: Jan 2004
Posts: 6,232
fredericksburg,va
C
cudaman1969 Offline
master
cudaman1969  Offline
master
C

Joined: Jan 2004
Posts: 6,232
fredericksburg,va
Originally Posted by lewtot184
i have a friend who was a ford racer and ford steel cranks are rare. He used cast cranks without issue but thought that limiting rpm was the key to longevity. i have noticed that some cast cranks have fillets, which is good, but mopar doesn't.

A friends 460 cast crank broke at speed not a pretty sight. Everything, cam, rods, cam journals, the whole center of engine were in small pieces in the oil pan. 69 Mustang running 6.20s all steel, so he was making some heat.

Re: Who has broken a cast 440 crank? [Re: cudaman1969] #3007955
01/22/22 06:51 PM
01/22/22 06:51 PM
Joined: Jan 2003
Posts: 1,335
Johnstown
69dart Offline OP
pro stock
69dart  Offline OP
pro stock

Joined: Jan 2003
Posts: 1,335
Johnstown
So nobody has broken a cast 440 crank?

Maybe we had it backwards all along and the cast one is better than the forged one. fan


33 Plymouth Roadster - 383 - 5.90 1/8th 9.58 1/4
68 Dart 340
Re: Who has broken a cast 440 crank? [Re: 69dart] #3007961
01/22/22 07:34 PM
01/22/22 07:34 PM
Joined: Mar 2011
Posts: 2,511
Michigan
T
Transman Online content
master
Transman  Online Content
master
T

Joined: Mar 2011
Posts: 2,511
Michigan
Originally Posted by 69dart
So nobody has broken a cast 440 crank?

Maybe we had it backwards all along and the cast one is better than the forged one. fan


Using a cast crank just teaches you to tip toe. Plenty of stocker guys using them.

Re: Who has broken a cast 440 crank? [Re: Transman] #3007996
01/22/22 09:52 PM
01/22/22 09:52 PM
Joined: Jan 2003
Posts: 29,805
Oregon
A
AndyF Offline
Too Many Posts
AndyF  Offline
Too Many Posts
A

Joined: Jan 2003
Posts: 29,805
Oregon
Mazzolini used to run a cast crank in his Super Stock car just to save some weight. That was a buzz saw of an engine. Personally I wouldn't do it but the NHRA guys are a little crazy. They would sell their mom into slavery for a tenth.

Re: Who has broken a cast 440 crank? [Re: AndyF] #3008074
01/23/22 07:44 AM
01/23/22 07:44 AM
Joined: Jan 2003
Posts: 6,331
nielsville, minn.
Q
quickd100 Offline
master
quickd100  Offline
master
Q

Joined: Jan 2003
Posts: 6,331
nielsville, minn.
Originally Posted by AndyF
Mazzolini used to run a cast crank in his Super Stock car just to save some weight. That was a buzz saw of an engine. Personally I wouldn't do it but the NHRA guys are a little crazy. They would sell their mom into slavery for a tenth.


Andy you exaggerate a bit there, .05 and their Mothers, sisters, daughters are gone!

Re: Who has broken a cast 440 crank? [Re: quickd100] #3008214
01/23/22 03:05 PM
01/23/22 03:05 PM
Joined: Sep 2003
Posts: 15,955
north of coder
moparx Online content
"Butt Crack Bob"
moparx  Online Content
"Butt Crack Bob"

Joined: Sep 2003
Posts: 15,955
north of coder
what about their dogs ? do they keep them ? biggrin
beer

Re: Who has broken a cast 440 crank? [Re: 69dart] #3008739
01/25/22 09:57 AM
01/25/22 09:57 AM
Joined: Jun 2015
Posts: 292
Northeast Indiana
7
73DAD Offline
enthusiast
73DAD  Offline
enthusiast
7

Joined: Jun 2015
Posts: 292
Northeast Indiana
Alright this is getting annoying...

The cast cranks are cast STEEL. All of the Mopar cranks are STEEL.

Vent over, carry on...

Re: Who has broken a cast 440 crank? [Re: 73DAD] #3008764
01/25/22 10:56 AM
01/25/22 10:56 AM
Joined: Jan 2003
Posts: 1,424
westerly, ri. usa
4
440lebaron Offline
pro stock
440lebaron  Offline
pro stock
4

Joined: Jan 2003
Posts: 1,424
westerly, ri. usa
i will be running a cast crank in my 400 stocker this year, keep you posted, my machine shop has not seen any 400's break stock rods or cranks. i did break a scat 4.15 (offset ground 4.25) in my 540 super gas car (trans brake 5500 rpm)


Last edited by 440lebaron; 01/25/22 10:57 AM. Reason: offset
Re: Who has broken a cast 440 crank? [Re: 73DAD] #3008794
01/25/22 11:50 AM
01/25/22 11:50 AM
Joined: Jun 2016
Posts: 749
Washington
H
hemienvy Offline
super stock
hemienvy  Offline
super stock
H

Joined: Jun 2016
Posts: 749
Washington
Are they really cast steel or cast iron ?
Inquiring minds.............

Re: Who has broken a cast 440 crank? [Re: hemienvy] #3008868
01/25/22 02:45 PM
01/25/22 02:45 PM
Joined: Sep 2003
Posts: 15,955
north of coder
moparx Online content
"Butt Crack Bob"
moparx  Online Content
"Butt Crack Bob"

Joined: Sep 2003
Posts: 15,955
north of coder
Originally Posted by hemienvy
Are they really cast steel or cast iron ?
Inquiring minds.............



cast STEEL..................
beer

Re: Who has broken a cast 440 crank? [Re: moparx] #3010052
01/28/22 05:20 PM
01/28/22 05:20 PM
Joined: Jan 2003
Posts: 9,470
Frostbitefalls MN (Rocky&Bullw...
gregsdart Offline
master
gregsdart  Offline
master

Joined: Jan 2003
Posts: 9,470
Frostbitefalls MN (Rocky&Bullw...
Originally Posted by moparx
what about their dogs ? do they keep them ? biggrin
beer
if your offered something off thier barbie and it tastes a bit different,,,, 😁


8.77 153 mph best, 3055 lbs 528 indy 440-1 alky
Re: Who has broken a cast 440 crank? [Re: hemienvy] #3010082
01/28/22 07:44 PM
01/28/22 07:44 PM
Joined: Jan 2005
Posts: 11,519
Kalispell Mt.
H
HotRodDave Offline
I Live Here
HotRodDave  Offline
I Live Here
H

Joined: Jan 2005
Posts: 11,519
Kalispell Mt.
Originally Posted by hemienvy
Are they really cast steel or cast iron ?
Inquiring minds.............


True 100% cast iron is very soft compared to cast steel used for crankshafts. Now if it is a cast Eagle 360 crank it is cast out of playdough.


I am not causing global warming, I am just trying to hold off a impending Ice Age!



Re: Who has broken a cast 440 crank? [Re: 69dart] #3010110
01/28/22 09:27 PM
01/28/22 09:27 PM
Joined: Aug 2003
Posts: 3,888
St. Louis, MO
Blues_Cuda Offline
master
Blues_Cuda  Offline
master

Joined: Aug 2003
Posts: 3,888
St. Louis, MO
The previous shortblock in my wife's 70 Barracuda had a cast crank. It held up fine to years of abuse, running 10s with Indy heads in a 70 Charger, and then mid to low 11's with 906 heads in the Barracuda. The crank is still fine, actually. It's the 1/3 of the LY rod from #7 that ended that shortblock. It exited out the side of the block and broke the starter off the bellhousing. grin


DSC05610.JPGDSC06202.JPG
Page 2 of 2 1 2






Powered by UBB.threads™ PHP Forum Software 7.7.1