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

afc housing and pump

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Old Dec 8, 2010 | 11:57 PM
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ill leave it be for now
 
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Old Dec 9, 2010 | 08:05 AM
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Originally Posted by Dirt_Diver
I had BD to my pump for me and they couldnt say s**t bout their pumps but i squeezed alittle info out of them. When you bore out the barrel, the only thing your doing is allowing more fuel to come in. But im not sure how much you can bore it.But i could see a difference with it.
Originally Posted by blazier18
ill leave it be for now
You mean THIS?
 
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Old Dec 9, 2010 | 10:41 AM
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Originally Posted by cummins95
x50 on the 4kgsk. my truck was a completely different animal after that.
For the 4k kit are upgraded valvesprings required or will this be fine with stock ones?
 
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Old Dec 9, 2010 | 01:20 PM
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Originally Posted by Turbolvr
You mean THIS?
naa its all good
 
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Old Dec 9, 2010 | 08:59 PM
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Originally Posted by Luke7750
For the 4k kit are upgraded valvesprings required or will this be fine with stock ones?
upgraded valve springs are required above 3200 rpm range to keep the valves from floating
 
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Old Dec 9, 2010 | 09:06 PM
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im running the 4k with stock valve springs, but just to be safe i never go above 3 grand, n its very seldom i even hit that
 
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Old Dec 9, 2010 | 09:15 PM
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More of a risk then i'm willing to take especially for what little they cost and the 30-45 minutes it takes me to install them...
 
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Old Dec 9, 2010 | 09:49 PM
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the only reason im gonna get a 4k is for sled pullin and the only reason im gonna do #60's is thats the only time ill hit that but will need them
 
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Old Dec 9, 2010 | 09:50 PM
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high boost or an Ebrake can float the valves too!
 
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Old Dec 9, 2010 | 09:52 PM
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not my hx35
 
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