5.9L Rotary Performance Discussion of 12 Valve 5.9 Liter Dodge Cummins Diesels with Rotary Injection Pumps Related To Performance And Longevity

91 12 valve cheap mods

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Old Mar 30, 2010 | 04:14 AM
  #1  
91cumminER's Avatar
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From: medway,ohio
Default 91 12 valve cheap mods

hey yall...iam new to this site and the diesel world.I picked up a 91 12 valve dirt cheap off my grandpa..($600).Runs great has 202k on it whats some cheap and easy ways to gain some more hp/tourqe and some smoke and still somewhat get decent mpg. thanxfellas
 
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Old Mar 30, 2010 | 04:15 AM
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welcome to db's i would start with exhaust an gauges!!!
 
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Old Mar 30, 2010 | 04:19 AM
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thanx bud,what would ya reccomend?they have access or links on here?
 
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Old Mar 30, 2010 | 10:34 AM
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use the search button up top. the age old question is asked a couple times a week every week. youll find alot of good info up there
 
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Old Mar 30, 2010 | 10:37 AM
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welcome to diesel bombers and like tltruckparts there is lots of good info
 
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Old Mar 30, 2010 | 10:43 AM
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howdy lots of good info here and you have a great truck there is ALOT of potential with these rigs just look around and dont be afraid to ask questions




Brice
 
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Old Mar 30, 2010 | 12:59 PM
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Rollin Smoke Diesel has a 4" system with the 4" Down pipe for a good price. For a good price on autometer gauges you can go to re-racing.com, for isspro the sponsors her had the best price. Just go to Price Quote - Request A Price - Diesel Bombers and ask them for a quote on the gauge setup.
 
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Old Mar 30, 2010 | 05:52 PM
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After i got gauges i took the afc spring out, turned the fuel pin til the deepest part was facing forward, and turned the full fuel screw 1 turn(mint hit the collar on the screw but i think they are all in different places) I cant hit anything over 1050* EGT empty at WOT, and didnt go over 1100* with 3000lbs in the bed. I still get 16-18mpg depending on how i drive, i'm sure you could get 20mpg if you kept your foot out of it. As for exhaust I just used 3" flex-pipe and put a 5" stack in, but my stack was free, so i only have like $22 in my exhaust.
 
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Old Mar 30, 2010 | 11:25 PM
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thanx fellas for the input..i hope to get some pics uphere soon!!
 
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Old Apr 9, 2010 | 03:52 PM
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3200 rpm spring bud
 
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