well i dont kno your mods but you should get the waste gate fixed that will help but the drag comp is going to add lots!!!! of fuel that u wont b able to burn i have the comp and it smokes like crazy but im lookin for a new turbo to help with that

 

my drag comp hadly smokes at all . my combo is good though, not wastin fuel out the stack. some of em smoke like crazy though, mine smoks but its not a steam loco kinda smoke

 

If you don't have guages set up then you should consider the juice cuz you need some guages =P Or you could look at a tst fueling (no timing) box with the guages in the remote and you could still run your tuner. I like the autometer z series guages myself, match nicely =P Regardless which you box you look at if you want more power than the tuner is going to give you you're either going to have to tap the wire or maybe look at some injectors instead

You should make sure you've got a boost elbow installed. If you happen to drive an 01-02 auto search for turnbuckle and j hook for more boost =P

How much boost are you seeing? If you can't answer that last question then you need to turn the edge box off and go shop for guages =P

 

I ran my Comp for two years without gauges till they made a Juice for 98.5-02. I've even run a little Nitro Methane. You just can't kill a cummins!!!