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

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  #31  
Old 12-18-2011, 08:04 PM
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Originally Posted by NadirPoint
No. and if by "hot" you mean 68F, then I guess it depends on how long it takes your intake to reach 68F. That's when a properly functioning IAT sensor tuns it off.

It closes off the pump's internal pressure regulator bleed port. Pump pressure increases and moves the advance piston against its spring. Then the piston rotates the cam ring so the rollers hit the lobes sooner, advancing timing.

None of that can happen until after the engine is running. Base timing is what it is. Most people who have tuned their VE's much have already advanced the timing beyond what makes the 6-8 degree KSB effect even noticeable.
I may not be getting my logic across clearly because a lot of what you say sounds like what I've already said. Atleast to me. Im sure the air dog and M&H timing spacer has a little to do with the factory function being "off" to say the least


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  #32  
Old 12-19-2011, 10:36 AM
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Could be, but did not seem like it to me. I keyed on the part about the KSB having something to do with starting:
Originally Posted by tower_ofpower
...in a dead state the retardation aids in cold starting.
There's no "retardation." Like I said, base timing is what it is. And the KSB has nothing to do with starting. It's a post-start pollution control device. That's all I'm saying.
 
  #33  
Old 12-19-2011, 02:16 PM
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Gotcha, and I was simply trying to say base timing is "retarded" compared to when the KSB is doing it's job, I understand that the KSB only advances, does not retard.


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