24V CUMMINS

I was wonderin what can i do without spendin money to make my trucks performance better? i have a 01 24v cummins and it has a diablo sport power puck which gives it a little get up but i would like more what can i do?  

I'd say the two things you could do that would make the most noticeable difference are a higher-flow intake and exhaust manifold. That should really help optimize the effect of the tuner.  

The biggest problem is that with these trucks, large performance gains don't come cheap.  With the 01's, (and I can speak from experience), it takes a decent chunk of money to really make big gains.  You can reduce the amount spent by looking around and finding used components, saving you at least 50% of what you'd be spending brand new, but you're still looking at a lot of money in the long run.  
Before you really start trying to make performance gains, you need to ensure that the components on the truck can handle the added horsepower/torque requirements.  With diesels, a lot of gains come from added fueling and air intake, but with the 24v Cummins, certain steps must be taken to decrease your chances of catastrophic and expensive component failures.  
The two primary issues are transmission and fuel supply.  If you're running an automatic transmission, at the bare minimum, you need to have an upgraded torque converter and valvebody, which will probably run you around $2-3k, for parts and installation. If you've got a manual, you can get a clutch and you'll be fine, probably about $800-1k new, from Southbend or Valair.
For fuel, depending on how crazy you want to go, you need to get an aftermarket lift pump.  Raptor, AirDog, or FASS.  You're looking from about $4-600 for one of those, but that will save you about $1000 plus in injector pump prices in the long run.  Also a fuel pressure gauge is a must.  
As the OP said, the biggest gains for the least amount of money would come in a 4 in exhaust and an intake, for which I'd go with the BHAF for the intake...$40 dollar semi air filter, works great up to about 500 hp.  
I ran 332/749 on the dyno, with the following components, and I got some of them used:
AirDog 150 (new) $499
South Bend Con OFE clutch (used) $400
Edge Comp (used) $300
gauges fuel pressure, pyro, and boost (new) about $300 for everything
BHAF (new) $40
dual 5 in turnout stacks (used) free
stack kit (new) $180
RV275 injectors (new) $300

It's not cheap, by any means, but it depends on how much hp/tq you want to add.  I've since upgraded to Scheid 150 injectors (used) and a new turbo, with a full 4 in exhaust to the 5 in stacks, and hopefully be pushing 450-500 hp.

I know this is a lot of info, but hopefully it helps you get an idea of how much it would cost to upgrade, and give you something to work with.  
01 Dodge CTD 2500 4x4 5spd AD 150, Scheid 150s, 64/71/14, Edge Comp stacked with at TST PM3 Comp, FP/EGT/Boost DiPricol gauges, BHAF, 4in exhaust to   5in stacks, SB Con OFE, and some other dress up stuff

thanx that really has helped me right now i am lookin at buying Banks high performance wastegate actuator for mt turbo and a AFE stage 2 cold air intake system hopefully that will give me some extra hp do you think thats a good choice?  

I'm not overly familiar with the banks actuator but it seems like it should help out with boost and some throttle response.  The cold air intake will definitely help the truck breathe better, it's all a matter of how much you want to spend.  If you're mechanically inclined I would also seriously look into a set of rv275 injectors.  With the addition of your chip on the truck they will definitely add some performance and help with mileage while only costing about 300 or so dollars.  
01 Dodge CTD 2500 4x4 5spd AD 150, Scheid 150s, 64/71/14, Edge Comp stacked with at TST PM3 Comp, FP/EGT/Boost DiPricol gauges, BHAF, 4in exhaust to   5in stacks, SB Con OFE, and some other dress up stuff