Right now I have superchip in my 06 TJ and I run it on the 87 octane tune. I want to buy a gauge called a scan gauge 2. It a gauge that does a digital read out of a bunch of different things. http://www.scangauge.com/
What I wanna know is if it would be fine for me to stack the two on top of each other. I know your not suppose to stack programmers, but the scan guage isn't a programmer, I believe it just reads your ecu and stuff.
you dont think that it would ruin my computer or anything with both of them on it?
not at all. The Superchips thing can't change much of anything anyway. They're a complete waste of money since by federal emissions regulations they can only change the air/fuel ratio at wide open throttle, in open loop. Read more here. The Scangauge only reads data, if it doesn't get a reasonable signal, it doesnt show anything. Its all OBDII protocol, so you won't blow anything up dont worry.
on my chip i have noticed a lil increase in power and i have noticed an increase in mpg, so in a couple months itll def be worth what i bought it for and my jeep feels like it runs a little smoother too. thanks for the advice i hope to buy the scan gauge2 soon.
Never use an obdii splitter unless it says you can, and that is typically only for the same brand of products. It can have conflicts in the communication protocol if you don't. Its fine to use the SC to program the ecu and then remove it and plug in the SG.
Those products won't do as much with the stock intake which is a thermoplastic material and used by the factory as it is more resistant to heat sink than the usual aluminum tube used by CAI manufacturers.