Re: For the hemi engine builders a crankshaft ?
[Re: dragon slayer]
#2754493
03/22/20 11:56 AM
03/22/20 11:56 AM
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Joined: Dec 2006
Posts: 2,122 Byron, NY
W.I.N. Racing
top fuel
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top fuel
Joined: Dec 2006
Posts: 2,122
Byron, NY
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You'l need a different flywheel and as stated prior this has been done in the past - often . Also as stated prior, by the time you clean up a stock crank and have it balanced you could buy a new crank.
Last edited by W.I.N. racing; 03/22/20 11:57 AM.
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Re: For the hemi engine builders a crankshaft ?
[Re: dragon slayer]
#2754496
03/22/20 12:00 PM
03/22/20 12:00 PM
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Joined: Sep 2003
Posts: 422 montana
BANDIT
mopar
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mopar
Joined: Sep 2003
Posts: 422
montana
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I did just what you are wanting to do 30 years ago. Didn’t have anybody close to rebalance it, ran it the way it was, worked fine, no vibration. Was a four speed car, used original pistons and rods, also. Was back in my not so educated days. ???Jim
64 Dodge Coronet 440. In progress 1998. Dodge Avenger. 8.35@165. 4400 DA 250” Neil and Parks Slip Joint. 7.36@183. 4600 DA 242" Mullis Dragster. 6.90@ 200mph
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Re: For the hemi engine builders a crankshaft ?
[Re: dragon slayer]
#2754629
03/22/20 04:42 PM
03/22/20 04:42 PM
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Joined: Aug 2003
Posts: 43,307 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,307
Bend,OR USA
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How much is Mallory (heavy) metal in your area per ounce now? The last time I had to have it used in a crankshaft for balancing was a long time ago and it was $100 per ounce then For a street build I would look at using some after market BB Chevy type H beam long rods, 6.700 or 6.800 and have the440 crankshaft offset ground to 3.91 long with a custom set of pistons
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: For the hemi engine builders a crankshaft ?
[Re: Hot 340]
#2754791
03/22/20 10:11 PM
03/22/20 10:11 PM
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Joined: Jun 2014
Posts: 1,340 VA
dragon slayer
OP
pro stock
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OP
pro stock
Joined: Jun 2014
Posts: 1,340
VA
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Thanks, yes old Super stock motor builder who happen to be a world champion said they did it in the day too, but he also said the Chrysler guys said you didn't need to balance the assembly either back then. I guess not for a few 1/4mi passes. I have everything to go stock, but crank had crack. Since it was a back fit to a 383 car, with an available 440 crank decided to ask. 440 to a hemi stock sure looks the same, and both are undercut. But adding weight would be a no go I guess. Got it on the new crank, and I can get one at a reasonable price but I am starting to say no to Chinese regardless of the quality. Which may mean finding an old hemi or use the old 440. Of course no to Chinese may also mean find a new hobby.
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Re: For the hemi engine builders a crankshaft ?
[Re: dart games]
#2754811
03/22/20 11:07 PM
03/22/20 11:07 PM
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Joined: Aug 2003
Posts: 43,307 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,307
Bend,OR USA
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ohio crankshaft has everything you need,use a hemi crank instead of short changing things I've used ten or more of their forged steel stroker cranks in street Hemi,RB and B motors. All of them had the stock street Hemi 8 bolt pattern and 1/2 inch thread size
Last edited by Cab_Burge; 03/22/20 11:08 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: For the hemi engine builders a crankshaft ?
[Re: Hot 340]
#2755015
03/23/20 01:14 PM
03/23/20 01:14 PM
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Joined: Dec 2006
Posts: 2,122 Byron, NY
W.I.N. Racing
top fuel
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top fuel
Joined: Dec 2006
Posts: 2,122
Byron, NY
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I . They are rolled/compressed undercut and not filleted. FYI Not all (if any) Street Hemi cranks are not Filleted and the metallurgy between a 440 crank and a Hemi crank from the same period are about equal other than the Hemi crank has been heat treated,. I've cracked open the bottom end on several street Hemis and None of them had a filleted crank.
'01 P1500, Blown/Inj BAE,/Veney ,Bruno/CS2,Dana 60 '01 Dodge 3500 S Cummins Auto, Fresh air kit, 4" Exhaust, '05 Dodge Magnum R/T - Too Much to list '60 Willys CJ5 '01 International LPX - Project,DT466, Allison '64 Plymouth Valiant, Inj 528 Hemi, 2spd
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Re: For the hemi engine builders a crankshaft ?
[Re: calrobb2000]
#2755365
03/24/20 10:12 AM
03/24/20 10:12 AM
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Joined: Jan 2003
Posts: 4,760 Moved to N.E. Tennessee
GomangoCuda
master
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master
Joined: Jan 2003
Posts: 4,760
Moved to N.E. Tennessee
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hi
i think you can use a 6 bbl or late 440 cop car / truck crank with the heavy rods as they have heavier counter weights so may not need heavy metal ? Those are externally balanced engines. He may not want to go down that road.
In theory, there is no difference between theory and practice. In practice, there is.
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Re: For the hemi engine builders a crankshaft ?
[Re: Hot 340]
#2755367
03/24/20 10:14 AM
03/24/20 10:14 AM
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Joined: Jan 2004
Posts: 8,351 fredericksburg,va
cudaman1969
master
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master
Joined: Jan 2004
Posts: 8,351
fredericksburg,va
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I . They are rolled/compressed undercut and not filleted. FYI Not all (if any) Street Hemi cranks are not Filleted and the metallurgy between a 440 crank and a Hemi crank from the same period are about equal other than the Hemi crank has been heat treated,. I've cracked open the bottom end on several street Hemis and None of them had a filleted crank. Race hemi or street hemi, none of them that I have heard of or seen that had the stock cranks in them had non fillet cranks in them Direct Connection sold Moldex and another after market brand replacement cranks that did have them though, I'm thinking those cranks where im just saying stock 440 cranks dont seem terribly reliable in a bracket car. If the hemi crank is the same as it is then i dunno why it seems to have a better record. I myself just bought an $800 ohio crank and was done with it. In all the years racing I’ve seen one crank break (of course we never tried to make 1000 hp on them either). ALWAYS had a good oiling system to. I say use it, Chevy uses 6 bolts for flywheel, that street Hemi won’t break that 440 crank.
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Re: For the hemi engine builders a crankshaft ?
[Re: cudaman1969]
#2755550
03/24/20 06:35 PM
03/24/20 06:35 PM
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Joined: Feb 2016
Posts: 201 PA
Scully
enthusiast
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enthusiast
Joined: Feb 2016
Posts: 201
PA
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I’m thinking the Stock and Super Stock guys used the 440 crank because it was LIGHTER. Big name engine builders been using the 318 cast crank in the 340 cars for years because it’s lighter. Cast cranks in 383-440 also, about 8 pounds lighter. I would use the 440 crank so the balance is off a little, street car! I weighed 4 cranks I had in my shop years ago. A steel 440, cast 440, a steel 383 and cast 400 and they were all 76 lbs, I was surprised. I used a cast 318 crank in a 340 NHRA stocker engine I built for a customer once, it was about 5 lbs lighter.
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