Iron-Hyde
New member
- Joined
- Aug 11, 2008
- Messages
- 261
ok, so I am working on a buddy's 07 5.9, we replaced the cp3 with a II 85% over unit last night finally, after the stocker blew out the front seal a month or so ago. He bought the truck off of a forum member here this summer, so I don't know every detail of the truck, but here's a list of pertinent mods:
Wicked Diesel twin kit for stocker over a S475
Mitusa Lift pump
Smarty
DR Performance pressure box (2 pos toggle version)
Flux "90 hp" injectors
now has a II 85% cp3
Now, it doesnt matter how much fuel is in the tank, or which setting the smarty is on, the feed pressure to the cp3 is 15 psi max at idle and at only 30-50% throttle will drop below 10, to about 5 psi and hold there. Its got a rail pressure gauge, so i tried Smarty tune 9 and tune 7 and with the pressure box off and on, WOT pressure holds at 15k psi. I think I should be seeing 22k+ right? I think the rail relief valve is stock unmodded, so i might try to shim it. but that wont affect my feed pressure which i am also concerned about. Mitusa's dont just stop pumping. i haven't looked for the regulator for the LP yet, its not in plain view. do the dodge kits come with one? might it need adjustment?
Thanks,
Tim
Wicked Diesel twin kit for stocker over a S475
Mitusa Lift pump
Smarty
DR Performance pressure box (2 pos toggle version)
Flux "90 hp" injectors
now has a II 85% cp3
Now, it doesnt matter how much fuel is in the tank, or which setting the smarty is on, the feed pressure to the cp3 is 15 psi max at idle and at only 30-50% throttle will drop below 10, to about 5 psi and hold there. Its got a rail pressure gauge, so i tried Smarty tune 9 and tune 7 and with the pressure box off and on, WOT pressure holds at 15k psi. I think I should be seeing 22k+ right? I think the rail relief valve is stock unmodded, so i might try to shim it. but that wont affect my feed pressure which i am also concerned about. Mitusa's dont just stop pumping. i haven't looked for the regulator for the LP yet, its not in plain view. do the dodge kits come with one? might it need adjustment?
Thanks,
Tim