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

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Old Apr 10, 2010 | 07:04 PM
  #51  
big bad diesel 416's Avatar
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ok loosen all 3 bolts and push that sucker all the way to the head
 
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Old Apr 10, 2010 | 07:21 PM
  #52  
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alrighty man, i will do it manana and post back with how much i see of a difference
 
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Old Apr 10, 2010 | 07:31 PM
  #53  
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sounds good
 
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Old Apr 11, 2010 | 07:54 AM
  #54  
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Just be aware the heat produced from burning fuel in an internal combustion engine is a zero sum game. The EGT gauge reading lower only means the heat is somewhere else. That somewhere else in the case of advanced timing is in the cylinders, with increased cylinder pressure - thus better efficiency. So your EGT has shifted towards the pistons.

This won't usually be a problem within the normal rage of adjustments in a typical 1st Gen You could possibly run into issues with big power engines running on the hairy edge or possibly under heavy towing conditions, where you are going to get a meltdown quicker than you would with more conservative timing.
 
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Old Apr 11, 2010 | 12:33 PM
  #55  
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Originally Posted by NadirPoint
Just be aware the heat produced from burning fuel in an internal combustion engine is a zero sum game. The EGT gauge reading lower only means the heat is somewhere else. That somewhere else in the case of advanced timing is in the cylinders, with increased cylinder pressure - thus better efficiency. So your EGT has shifted towards the pistons.

This won't usually be a problem within the normal rage of adjustments in a typical 1st Gen You could possibly run into issues with big power engines running on the hairy edge or possibly under heavy towing conditions, where you are going to get a meltdown quicker than you would with more conservative timing.

My thoughts as well. Everybody thinks that they will save the pistons with advancing the timing to lower the egt's. I feel it only lowers the temp after the cylinders.

---AutoMerged DoublePost---

Originally Posted by big bad diesel 416
no cons that i know of.....
lower EGTS
increased spool up
better mileage

take a tape and measure from the top of the pump to the head


Slower spool up.










.
 

Last edited by Richie O; Apr 11, 2010 at 12:33 PM. Reason: Automerged Doublepost
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Old Apr 11, 2010 | 02:56 PM
  #56  
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Originally Posted by Richie O
Slower spool up..

never had that prob with an 1/8 bump
 
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Old Apr 11, 2010 | 04:47 PM
  #57  
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Originally Posted by big bad diesel 416
never had that prob with an 1/8 bump
Maybe not with an 1/8th but shoving it to the head was mentioned.
 
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Old Apr 11, 2010 | 05:22 PM
  #58  
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Originally Posted by BIGREDGOAT
like a 1/16 or 1/8
Originally Posted by Richie O
Maybe not with an 1/8th but shoving it to the head was mentioned.

that is because it is only a 1/6-1/8 away from the head now
 
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Old Apr 11, 2010 | 05:29 PM
  #59  
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Most people measure where the lines are on the timing cover. Mine is 3/16's above the timing mark but still does not hit the head.
 
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Old Apr 11, 2010 | 05:32 PM
  #60  
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interesting i have allways done it from the afc to the head and gone 1/8 up there so that would be say 3/8 down there?
 
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