i think that dieselsite actuator is a bandaid solution. you'd be better off with a regular actuator and then some kind of actual controller. I run a turbosmart actuator and an AEM tru-boost* electronic controller so can I easily switch between different boost levels depending on whether i'm running street or race tunes.
you don't have to go with a fancy electronic controller though. if you want to just set and forget it you can go with a cheaper manual controller like a turbosmart boost-tee or even one of the cheaper ones off amazon or whatever.
I really have NO IDEA why boost controllers aren't more prevalent in diesel land. using one of these your wastagate will stay closed for best response until you reach your target boost level, then the wastegate will completely open for best exhaust flow and it will make a substantial difference in EGT's and perhaps pick up a couple of peak HP.
the only downside here is that it can take a bit of trial and error, or at least knowing your truck well to get it setup just right. my "hot street" tune tops out the boost about 28psi, so i set the low setting on my controller for 28psi. I have my high setting at 38psi to hopefully keep the heads and valves happy until a do some studs and springs. the electronic controllers are easy to setup from the cab, if you go with a manual controller you'll have to go the strip/dyno/country road and make multiple full throttle passes to get it set right where you want it.
*I used to run an HKS controller, but switched to the AEM as it fits in a gauge pod. you can score used HKS controllers for pretty cheap on ebay.
