I have a 2002 with a nv5600, 4:10 rears, hankook 35" rt03's, 2"spacers, i have a big fuel line kit installed, k&n filter, and a fuel pressure guage. All else is stock, and i have 197,000 miles on this beast. What are my first power upgrades from here while beeing able to use the stock injection pump? I will be installing a 4" exaust with a 3.5" down pipe in the next few weeks. I want to start playing with this thing, but i don't want to push it over the line as far as needing to mod everything so to speek. I load it down pretty hard with firewood, and tow once in a while, so that needs to be in the equasion. Thanks for any input.

 

Get a Smarty!

 

Since you have an intake & are installing an exhaust. I would say make sure you have a good lift pump & than get something like an Edge Comp Or Juce W/Attitude.

 

Get a smart for blasting through gears quick =) Just watch the rpms because you can get past redline pretty quick. Then if you want more power the HO trucks really wake up with a set of injectors. You should be fine for fuel pressure with that setup.

 

How big or far with the injectors can i go with the stock fuel pump? So far a positive response for the smarty. I read a little about it, and it does seem nice. Does it correct the computer for the 35" tires? First i have to get the front end rolling smooth without all the shaking and comotion, Then i will start slipping in the power mods. Thanks for the input so far.

 

I believe the standard VP 44 are considered better overall. What are your HP/torque objective/goal.

 

Don't worry about you VP-44. First limiting factor will be your clutch, or low fuel pressure due to lift pump. IMO.
You should be OK with Smarty (definately should be 1st mod) and a set of 100 hp injectors, before needing a clutch.

Don't pull fuel pressure below 10 psi (to help protect injector pump).

RJ

 

Yes smarty can correct for tire sizes and an oem pump worked fine with stage 4 injectors on my truck. I had a line kit like your sig says you have too =)

 

I would say Edge Juice w/ or w/o attitude and Stage 2 or 3 injectors. This would put you in line for an HX40 (cheaper) Phatshaft or Aurora (pricey) turbo with that exhaust you're getting. Just my .02