12 Valve 2nd Gen Dodge Cummins 94-98 Discussion of 12 Valve 5.9 Liter Dodge Cummins Diesels with P7100 Injection Pumps

timing=more power?

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Old Dec 3, 2010 | 02:21 PM
  #21  
94 12valve's Avatar
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your still injecting the same amout of fuel just sooener ... but yes it should slightly reduce smoke.

AFC tuning will make more difference in smoke control than timing will
 
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Old Dec 3, 2010 | 03:52 PM
  #22  
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It also depends on how you drive your truck as to how much it will hold with stock bolts. Im one that wont go past 16.5 with stock bolts but i did a truck with stock bolts to 23 and it lasted until he got rid of the truck and when he got rid of it the kid didnt have it for the weekend and it got trashed. It will greatly effect your spool time with a bigger charger and poorly tuned afc, and this said truck hated cold weather by the way.
 
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Old Dec 5, 2010 | 04:58 PM
  #23  
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heard that well i just want a little more power with this nv4500 comin im goin to 19!!! how much does it cost to get a pump flowed if i take one off and take it to them to so i cant get a little more fuel with timing at once
 
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Old Dec 5, 2010 | 05:24 PM
  #24  
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depends on whom does it ... round about $300 ish for balanced and flowed
 
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Old Dec 5, 2010 | 05:49 PM
  #25  
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so i might as well go big huh

---AutoMerged DoublePost---

Originally Posted by blazier18
so i might as well go big huh
or just wait till i get the money to go big and get a bigger turbo
 

Last edited by blazier18; Dec 5, 2010 at 05:49 PM. Reason: Automerged Doublepost
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Old Dec 5, 2010 | 08:05 PM
  #26  
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if your gonna do it, now while the pump is off is the best time. you will always be able to cut fuel via fuel plate pos for what ever charger you end up with
 
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Old Dec 5, 2010 | 11:47 PM
  #27  
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the problem with adding too much timing is that the p7100 has fixed timing, and even 12 degrees is alot of timing for idle speed so its a trade off, it kinda sucks really. a Duramax or any modern diesel would idle in the negative timing numbers and then go all the way up in the 30s(on a hot tune) when running.
 
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Old Dec 6, 2010 | 12:14 AM
  #28  
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Originally Posted by blazier18
that big of a difference huh? does it reduce smoke
It did to a certain point.
 
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Old Dec 6, 2010 | 03:33 PM
  #29  
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Originally Posted by Chevy355mark
the problem with adding too much timing is that the p7100 has fixed timing, and even 12 degrees is alot of timing for idle speed so its a trade off, it kinda sucks really. a Duramax or any modern diesel would idle in the negative timing numbers and then go all the way up in the 30s(on a hot tune) when running.
i can adjust idling if thats what you mean and good deal to reduce it after u roll smoke a while u just want power or i do
 
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Old Dec 11, 2010 | 08:51 PM
  #30  
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Are there any down sides to adjusting the timing? I heard that it risks the pistons...unsure though...
 
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