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Author
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Topic: mallory metal question?
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CometGT1974
Gearhead Posts: 412
From: Asheville, NC USA
Registered: Jan 2002
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posted 03-21-2005 10:45 AM
   
What types of metal are used when balancing a crankshaft? I was told that it was a tungsten alloy?? Can you just about use anything that has a real good weight to mass ratio?
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indyphil
Gearhead Posts: 2690
From: Senoia, G.A. USA
Registered: Jul 2002
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posted 03-21-2005 10:57 AM
When you say good "mass to weight ratio" you mean density right? which is mass to volume ratio. Sorry, im an engineer - i sound like a nitpicker.And I think it would have to be a strong metal - for example I would think lead would deform under the G forces? Iron and steel are pretty dense materials so to significantly add weight it takes a special material, tungsten is VERY dense - according to one source Mallory metal is 55% heavier (more dense) than lead. Depleted uranium. is heavy stuff but I dont have any of that laying around in my garage. Im guessing you will want to stick with the industry standard there. ------------------
'68 coupe, '66 289 C code
engine, edel 600cfm carb, performer intake, dual exhaust http://www.geocities.com/ottouk_77/68mustang.htm
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n2oMike
Gearhead Posts: 2680
From: Spencer, WV
Registered: Jan 2001
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posted 03-21-2005 11:09 AM
Densities:Iron, 7.87 Lead, 11.35 g/cc Tungsten, 19.3 g/cc So, yea.... Tungsten is WAY heavier for its size than lead. Tungsten also has a VERY high melting point, and is the metal used in light bulb filaments.  ------------------
Mike Burch
66 mustang real street
302 4-speed 289 heads
10.63 @ 129.3
http://www.geocities.com/carbedstangs/cmml_mburch.html
http://www.fortunecity.com/silverstone/healey/367
http://www.mustangworks.com/cgi-bin/moi-display.cgi?220
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Moneymaker
Administrator Posts: 26811
From: Lyons, IL, USA
Registered: May 99
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posted 03-21-2005 11:28 AM
In most cranks that are not made of some ultra exotic material, Mallory is the industry standard.------------------
Alex Denysenko
Co-Administrator and Moderator NHRA/IHRA/SRA member and licensed Superstock driver
NHRA and IHRA SS/LA & SS/MA National Record Holder '00,'01,'02,'03,'04 &'05
First SS/MA in the TENS!
IHRA division 5 Superstock Champion
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28 The Barry of BarrysGrrl Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"
www.moneymakerracing.com
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CometGT1974
Gearhead Posts: 412
From: Asheville, NC USA
Registered: Jan 2002
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posted 03-21-2005 11:41 AM
I've got a chance to buy some tungsten/copper bar stock for a real good price and I was just wondering if it could be used to internally balance a crank......
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Rustang
Gearhead Posts: 805
From: Clarion PA
Registered: Nov 2000
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posted 03-21-2005 12:12 PM
From what I've read, mallory-metal is tungsten. I'd be leary of the copper-tungsten alloy, as the tungsten might be the alloying agent and may not be anything close to what you actually need. For example, tungsten is also used in alloying steel (for tool steels). But it is such a small percentage of the alloy "mix" that it doesn't affect density of the steel. To investigate further find out what percentage of tungsten is in that stuff your looking at.  ------------------
'68 mustang 351 clevor- 10.92@124
'67 Stang, 351W -11.18@118
'69 351C Torino-14.90@100
'78 Pickup 351W-15.56@88
'79 Pickup 460 ET=??
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Fordwiser
Gearhead Posts: 428
From: Metamora, Illinois
Registered: Dec 2000
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posted 03-21-2005 06:07 PM
The copper may or may not affect how it welds also when it's tigged into the crank.
Might ask about that too.Roger
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indyphil
Gearhead Posts: 2690
From: Senoia, G.A. USA
Registered: Jul 2002
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posted 03-21-2005 07:55 PM
Hey Alex
you hinted that there might be other more exotic materials used. Im interested... Tell me more  I remember reading about Beryllium being banned from Formula 1 engines and someone said it was used for balancing? Would that be right?
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'68 coupe, '66 289 C code
engine, edel 600cfm carb, performer intake, dual exhaust http://www.geocities.com/ottouk_77/68mustang.htm
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Dusty Kiser
Gearhead Posts: 180
From: Bethel,Oh USA
Registered: Mar 2002
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posted 03-21-2005 09:40 PM
Berylium is an extemely dense and rare (expensive) metal used as a "tamper" in nuclear weapons to reflect electrons back into the mass and highten the reaction of a given nuclear mass. Formula one engines are extemely compact in order to maximize the aero package, so volume is a major issue for designers.
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