There is a ion guide on warpig with regards to setting your dwell, i will try and explain roughly how to set it correctly assuing you have digested the manual that came with the marker, if you have a qev installed this also helps to bring the dwell down a bit...
Using the flashy lights bring your dwell down to 0 (stops flashing) increase it to about 10 flashes and pull the trigger and see if the marker will cycle (shoot), that low its doutful it will but each marker is different. Continue to up the dwell until the marker cycles (it makes a bang bang not a pfffftt pffftt) you can try going up in 3 or 5 flashes for quickness. Once you have it cycles properly you can fine tune it using single flashes (as a guess with a qev your looking at about 15 - 20 ish but each marker varies), once you find the cycle point add on 10 flashes up and its pretty much tuned ok.
There is several ways to set the dwell, another is using a chrono which is probs the best way but will use paint and my guess is if your just new you dont like to just waste paint.
Either way your marker will need to be chrono'd after setting the dwell, shoot a few balls over the chono after doing the above chances are it will read +/- 10 ish adjust it using the little spanner until you get close to the field limit (280 / 300 or whatever).
Your marker is good to go, if during rapid shooting you notice any drop off (the balls seem to drop off closer, or now and again your marker makes the pffftt noise instead of the bang bang then up your dwell say another 5 (ish) and that should cure your problem (make sure you have a good battery, brand spanking new energizer lithium or procels work great).
The more you shoot your marker the better it will become as its 'broken in' however dont expect miracles, your more then likely your only looking at 5 pods and a loader off a 1.1 @ 3k with a 0.8 @ 3k your probs only talking 3 maybe 4 pods and a loader tops.
Hope this helps, here is a few links that make a good a read if you get a chance which explain things far better then i could ...
http://www.warpig.com/paintball/technical/paintguns/smartparts/ion/howitworks.shtml
http://www.warpig.com/paintball/technical/paintguns/smartparts/ion_calc/
The first will help you understand your marker and help you with any issues you may have or at least helps you maintain your marker. The second link explains all about modes ROF cap and of course setting the dwell correcting with a nice little tool that helps you work out how many balls per second your shooting etc.
If you get stuck i will be happy to help