Re: How to idnetify a crank pulley for cast vs forged crank
[Re: vinnyd76]
#2487860
04/25/18 05:08 PM
04/25/18 05:08 PM
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Joined: Aug 2003
Posts: 43,176 Bend,OR USA
Cab_Burge
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Not that I have ever heard of, Mopar changed the crank pulley bolt pattern in either 1971 or 1972 from non symmetrical to symmetrical on all the V 8 motors. They didn't make and use different pulleys in the cast crank motors versus the forged steel crank motor That is probably due to cost and confusion on the assembly lines
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: How to idnetify a crank pulley for cast vs forged crank
[Re: vinnyd76]
#2487870
04/25/18 05:32 PM
04/25/18 05:32 PM
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Joined: Jan 2003
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AndyF
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Is there a quick way (e.g. bolt pattern, off set, etc...) to determine if a crank pulley is for a cast or forged crankshaft? Your question doesn't make sense. Are you asking about the damper rather than the pulley?
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Re: How to idnetify a crank pulley for cast vs forged crank
[Re: AndyF]
#2487923
04/25/18 07:28 PM
04/25/18 07:28 PM
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Joined: Apr 2012
Posts: 1,563 Macomb, MI
vinnyd76
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Attached is a photo... are they the same for cast or forged crankshafts? Someone asked me once if a pulley I have was for a cast or forged crank. I was not sure how to distinguish, if there are different applications based on crankshaft. I know there is with and without AC or Power Steering.
Last edited by vinnyd76; 04/26/18 09:56 AM.
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Re: How to idnetify a crank pulley for cast vs forged crank
[Re: vinnyd76]
#2487946
04/25/18 08:34 PM
04/25/18 08:34 PM
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Joined: Jul 2011
Posts: 957 Chicago
PurpleBeeper
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Not that I am aware of other than casting numbers on the pulleys themselves, but I'm not sure that matters unless you are a "numbers matching" guy.
At least for RB motors, CAB is correct. In 1972, Mopar switched to a symmetrical bolt pattern on harmonic balancers (& pulley holes). Before that, there was one offset hole in both the balancer & the pulley.
As far as I know, the only mechanically important things are bolt pattern & pulley diameter & number of grooves/pullies on the part vs. your accessories (e.g. power steering, A/C, etc.). The pulley diameter would affect how fast your accessories turn (e.g. "overdrive" or "underdrive" your water pump).
The 440source list is a really good one.
Last edited by PurpleBeeper; 04/25/18 08:34 PM.
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Re: How to idnetify a crank pulley for cast vs forged crank
[Re: vinnyd76]
#2488073
04/26/18 01:49 AM
04/26/18 01:49 AM
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Joined: Aug 2003
Posts: 43,176 Bend,OR USA
Cab_Burge
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Someone asked me once if a pulley I have was for a cast or forged crank. I was not sure how to distinguish, if there are different applications based on crankshaft. I know there is with and without AC or Power Brakes. The person who ask you that question is not a Mopar knowledgeable person The pulleys are different from some years to others, for instance in 1969 and later Mopar change the back spacing and diameter on the street Hemi pulleys 1966 to 1968 are the same, 1969 and later are not. You can swap the upper and lowers as a set and make them work, you can't swap only one of them though As far as power brakes the on Mopar cars pulleys have nothing to do with the brakes, power or non power in other words the pulleys on a standard steering car with power brakes are the same as if the car had regular brakes if they both have the same motors in them What does make a difference on the pulleys is power steering or power steering and air conditioning and the year and brand of the cars body style
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: How to idnetify a crank pulley for cast vs forged crank
[Re: Cab_Burge]
#2488138
04/26/18 09:57 AM
04/26/18 09:57 AM
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Joined: Apr 2012
Posts: 1,563 Macomb, MI
vinnyd76
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Someone asked me once if a pulley I have was for a cast or forged crank. I was not sure how to distinguish, if there are different applications based on crankshaft. I know there is with and without AC or Power Brakes. The person who ask you that question is not a Mopar knowledgeable person The pulleys are different from some years to others, for instance in 1969 and later Mopar change the back spacing and diameter on the street Hemi pulleys 1966 to 1968 are the same, 1969 and later are not. You can swap the upper and lowers as a set and make them work, you can't swap only one of them though As far as power brakes the on Mopar cars pulleys have nothing to do with the brakes, power or non power in other words the pulleys on a standard steering car with power brakes are the same as if the car had regular brakes if they both have the same motors in them What does make a difference on the pulleys is power steering or power steering and air conditioning and the year and brand of the cars body style Sorry, I meant to say Power Steering not Power Brakes. I corrected the post. Thank you for the feedback.
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Re: How to idnetify a crank pulley for cast vs forged crank
[Re: NANKET]
#2488696
04/27/18 02:17 PM
04/27/18 02:17 PM
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Joined: Aug 2003
Posts: 43,176 Bend,OR USA
Cab_Burge
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I didn't see that your post was not part of vinnyd76 Sorry
Last edited by Cab_Burge; 04/27/18 02:18 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: How to idnetify a crank pulley for cast vs forged crank
[Re: vinnyd76]
#2489821
04/30/18 04:19 AM
04/30/18 04:19 AM
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Joined: Aug 2007
Posts: 6,095 Valencia, España
NachoRT74
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Pulley holes has nothing to do with cast or forged dampers, but just the year. I can fit a symmetrical hole pattern pulley on any damper as far is also symmetrical damper setup, no matter if casted or forged balancing damper.
BTDT.
The pulley setup and sizes changed allong the years due the diff engines setup and equipments itself. Some diff diameters considerations came out also to the rotation speed "upgrades" made allong the years to the diff miscelaneous parts for the engine ( alts, AC compressor, water pumps etc...)
With a Charger born in Chrysler assembly plant in Valencia, Venezuela
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