The accuracy I'm talking about is in the display(I was pretty sure that the components are pretty much all the same quality). At best for the analog gauges your are only able to estimate what is going on. The digital(granted it has to be working correctly of course that has to be said of the analogs as well) will let you know exactly where you are at. I know that boost I'm reading 13 psi, where is an analog it could be anywhere from 12 to 16(going by the factory boost). In my mind there is a huge difference knowing that you are at 13 versus just guessing if your between 12 to 15. I could be at 27 psi, but the factory analog gauge(and I would be willing to bet that it is with most analog gauges) it could look like I'm at 30, so while the difference between 13 vs. estimating at worst 16 isn't a bad thought as far as engine problems, when you start getting to higher pressures or temps, estimations(atleast in my mind) are not as good, particularly if you are trying to eck whatever little bit you want from the engine and still stay within certain safe (all be it lax in that safety) readings. Now egt and tranny temps are more importent to me then boost, but I still like to know exactly where I'm at all the time. So while yes, a thermocouple is the same rather hooked up to a digital or analog gauge, the information displayed is vastly different in my mind. I find it more useful and safer knowing exactly where I'm at versus just guessing somewhere between 500-650 degrees(now I know that isn't a danger as far as temps go, but you still have the same issues at those more critical temps). Now I will admit that I'm a stickler when it comes to wanting to know exactly where things are at(and I've gotten flack for it from various places) and really it may not be necessary, I know that there are alot of people out there that have analog gauges and run fine, but given my personality and my perception of things(which could be wrong and if it is with regard to the accuracy of the display then please let me know) to me I believe that you get more accurate displayed readings from a monitor then from an analog gauge.

 

You are referring to the range of readout, or resolution not accuaracy. All digital gauges are calibration checked by analog test gauges.

 

I have SCT with custom tunes from LIDiesel.com Works fine for monitoring the systems, as for interfacing with the SCT I am not sure.

 

Ok, I think I see what your talking about now.