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Re: Off set grinding a cast 440 crank. [Re: tuff440] #2807920
08/12/20 01:12 AM 08/12/20 01:12 AM
Joined: Jan 2003
Posts: 6,136
Melbourne , Australia
LA360 Offline
master
LA360  Offline
master

Joined: Jan 2003
Posts: 6,136
Melbourne , Australia
A quick Google search found this, along with many others

https://www.forebodiesonly.com/forum/threads/440-rod-weight.11407/

Alan Jones
Re: Off set grinding a cast 440 crank. [Re: tuff440] #3092855
11/09/22 02:28 PM 11/09/22 02:28 PM
Joined: Jan 2006
Posts: 81
neche, ND
5
526 Offline
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526  Offline
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Joined: Jan 2006
Posts: 81
neche, ND
I have a steel 383 mopar crank that has a Chevy off set stroke and made 850 hp.
Re: Off set grinding a cast 440 crank. [Re: tuff440] #3092859
11/09/22 02:43 PM 11/09/22 02:43 PM
Joined: Aug 2003
Posts: 43,127
Bend,OR USA
C
Cab_Burge Offline
I Win
Cab_Burge  Offline
I Win
C

Joined: Aug 2003
Posts: 43,127
Bend,OR USA
i have a lot of offset ground stock Mopar BB cranks offset ground to BB chevy rod journal sizes for both B and RB motors, no crank failures yet luck. I use them in a lot of pump gas 400block stroker motors: up:
I've also had aftermarket BB Mopar stroker cranks offset ground to increase as well as decrease the stroke.
Cab
I just seen the comment on your crank being a later cast crank, not a forge steel crank. I have never had a B or RB cast crank offset ground only, forged steel cranks for those motors. Sorry for any confusion blush
I have had a premium new cast 360 crank offset ground to increase the stroke a little, I had it ground down the SB Chevy small rod sizes, 2.000. I haven't use it yet though blush

Last edited by Cab_Burge; 11/09/22 04:19 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: Off set grinding a cast 440 crank. [Re: tuff440] #3092946
11/09/22 07:33 PM 11/09/22 07:33 PM
Joined: Oct 2007
Posts: 4,206
New York
polyspheric Offline
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polyspheric  Offline
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Joined: Oct 2007
Posts: 4,206
New York
Have a nice day

Boffin Emeritus
Re: Off set grinding a cast 440 crank. [Re: LA360] #3093378
11/11/22 10:29 AM 11/11/22 10:29 AM
Joined: Jan 2003
Posts: 9,986
Frostbitefalls MN (Rocky&Bullw...
gregsdart Offline
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gregsdart  Offline
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Posts: 9,986
Frostbitefalls MN (Rocky&Bullw...
Originally Posted by LA360
Would offset grinding a cast 440 crank significantly weaken the journals?
2.375" down to 2.200" and adjusting the stroke from 3.75" to 3.91" would reduce the journal overlap by about 25%


or would the chamfered edge and lower rod weight and smaller bearing surface counter the loss of material?
Have you spoken with your crankshaft grinder to see if it's possible? Without welding, you'll take 0.020-0.030" or more to get below the undercut, before you can even start start producing a fillet. Start taking off too much and you move the position of the oil holes on the journal.

On the oil holes, i have ground 440 forged cranks to 2.100 to get a 4 inch stroke. No problems with the oil holes, that 475 cube shortblock made great power, lasted a long time.

8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
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