5.9L 12V Performance Discussion of 12 Valve 5.9 Liter Dodge Cummins Diesels with P7100 Injection Pumps Related to Performance and Longevity

4k gov springs = SUPER touchy throttle

Old Jun 15, 2010 | 08:49 PM
  #11  
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Originally Posted by NadirPoint
Good advice. The 12v is all in at 2200. Spinning it over 3k is not doing much.
That would be true, if he had stock Gov Springs. Once you install a GSK, it will continue to fuel hard to 3k or 4k RPM. Problem is, once you pass 3000 you run the risk of floating vlaves and contacting the piston. So guys install 60lb valve springs. Those will keep you safe to 4k or so.
 
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Old Jun 15, 2010 | 09:54 PM
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Like said try backing them off one click and test. I didnt measure mine, just noted their orentation then I did inital click plus three more and it was dead nuts on...
 
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Old Jun 16, 2010 | 11:11 PM
  #13  
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how are 4ks for towing? im gonna do the 60 springs
 
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Old Jun 16, 2010 | 11:53 PM
  #14  
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i dont know i havent towed with them yet itll be a while before i tow im just workin out the final quirks from the project. im going to do the 60lb springs too fairly soon
 
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Old Jun 17, 2010 | 12:22 AM
  #15  
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they are just a little touchy but not bad in my experiance
 
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Old Jun 17, 2010 | 12:27 AM
  #16  
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Originally Posted by 12vcummins96
they are just a little touchy but not bad in my experiance
after 2 days of driving it im already pretty used to it and dont mind it at all. its not too hard to control when you know how to drive it and it is nice to have it when you want it there
 
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Old Jun 17, 2010 | 12:48 PM
  #17  
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You can do more return spring to stiffen the pedal up so it isn't quite so touchy or like mentioned early back them off a click. I would probably do both personally, I've also liked the 12 valves I've drove with more return spring.
 
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Old Jun 17, 2010 | 06:49 PM
  #18  
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Take one click off the gov springs and it will be a little more manageable.
 
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