1st Generation Dodge Cummins 89-93 Discussion of 12 Valve 5.9 Liter Dodge Cummins Diesels with Rotary Injection Pumps

why does the '94 -'98.5 have a larger harmonic balancer?

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Old 09-05-2010, 08:03 PM
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Default why does the '94 -'98.5 have a larger harmonic balancer?

I'm in the process of swapping all the accessories from a '96 12v to a '93 12v and noticed that the '96 has a larger balancer on the front of the crank. Anyone know why? And should I use the larger '96 balancer or the smaller '93 one?

Thanks
 
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Old 09-05-2010, 08:20 PM
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if you use a 93 crank and fly wheel use the 93 balancer and so forth
 
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Old 09-05-2010, 08:42 PM
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Thats what I was planning, but why did they change it I thought maybe it was just for reduced vibrations or something. Is the '93 flywheel different?

---AutoMerged DoublePost---

I think I answered my own question, southbend lists the same clutch/flywheel from '88 up.
 

Last edited by jpfiero; 09-05-2010 at 08:42 PM. Reason: Automerged Doublepost
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Old 09-05-2010, 10:03 PM
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the 1st gen clutch disks are 13" while the 2nd gens are 12.25". the south bend clutchs are all 13" so its an upgrade for the 2nd gens.
 
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Old 09-05-2010, 11:05 PM
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Why would dodge downsize the clutch and increase the horsepower and weight of the truck, but you had me scared for a second because I've got a 13" clutch kit from southbend that I'm going to install on the '93 block
 
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Old 09-06-2010, 12:22 AM
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Originally Posted by jpfiero
Why would dodge downsize the clutch and increase the horsepower and weight of the truck,
thats what they had on the shelf
 
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Old 09-06-2010, 01:33 PM
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LOL, someone should have installed some learnin' into that engineer

---AutoMerged DoublePost---

I was looking at both of the harmonic balancers and they do NOT have a pin or anything on them so they can be installed in any position relative to the crank. Is it safe to assume that means they are neutrally balanced?

If I install the smaller balancer on the newer truck will it throw off my tach reading since the sensor will be closer to the crank center?

I also found some info stating that cummins has 2 different styles of balancer 1 for engine speeds above 2500 and 1 for engine speeds below. does anyone change the balancer when they install a 4k governor kit?
 

Last edited by jpfiero; 09-06-2010 at 01:35 PM. Reason: Automerged Doublepost
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