I wrote some post on this forum awhile back on the differences. I imagine you can search and find them someplace. There are advantages where the pc3/v will outshine my controller/dobeck and my controller is different than the other dobeck not physically but the way i set them up.
The easiest way is to think of it in logic what does it do? and they both basically do the same thing they are a fuel metering device. And if fuel is right it is right its not a magic box that you plug in and walla you get more power. It controls a injector that is already controlled by a ecu and alters the signal that tell the injector to turn on and when.
both units modify pulse width to get your injector to deliver a certain amount of fuel. There isnt much difference its how they do it is what is different. The pc3/v is left more up to the user to be able to tune something hence the reason most people go to a dyno. The also are much more freindly to tune with for builds that they are not setup for you can basically adapt them to almost any situation. I have always said this and never said otherwise if you are building a large build or something that deviates a ways from what i have designed a specific map for your probably better off with a pc3/v. the reason is most all the controls for my controller are locked up inside where you can not access them with out software/hardware that only i have. Other shops that use the same type of controllers have the hardware but each controller is flashed with a unique serial # that will only allow the original designer to access it features or be able to reflash the unit so you are at the mercy of the original maker to make changes above and beyond what is built into a controller from the start.
pc3/v unlimited controller over injector a good thing? for some people yes for a lot of people no. with that control to be able to make a good map comes the ability to screw a map up majorly. I have a fair amount of engine builders/ shops that have been know to make fast bikes bring me there stuff because they cant figure out how to get a good map with a pc3/v. And truthfully without a dyno or some form a data acuisttion software/wideband your shooting in the dark at best. You can not build a good pc3 map with plug reading, my exhaust smells rich, sun is at 12:00 so that means richen 2500rpm lol. it just dont happen
my controller basically breaks the map up into 3 area you can modify from the controller the behind the scence stuff is taking care of you have limited control over what you can modify but everything should be very close already so for the guys that want to build something much more extreme its not the best setup for them they would need to have me change the behind the scences things to make it work for them. But for the guys that want to plug it in and not fuss with stuff its a way better option for them.
If you think you can plug a pcv/3 with a generic map on a big 3 big a make enough power to pull twice as hard as what my controller does is a long ways off. If you look at all the dyno sheets i put up i dont hide the AFR at all its all over everything and look at it compared to what else people offer before you say what you think is tuned.
I cant tell you how many times i have had guys come in with pc3/5 maps that were a generic map but setup for there bike that were so far off it wasnt even funny. Truthfully they are usually like that more then they are good.
If you think these controllers are not capable of some good stuff how can i run the same thing on my shop bikes which are some of if not the fastest all motor atv's in the country.