What are you going to use them for?
Serious question.
I see people get tons of guages on their car, and you can't look at them when they count or you don't know what to do when they say X or you can't do anything about it anyway.
I've seen so many posts about things like A/F ratio (which you should record, along with engine speed and manifold pressure), boost (see above), and other control items- or extra oil pressure guages (what will you do when it goes low, even though it's more than enough?).....
If you make them big enough to read easily, they will also be big enough to distract you from the important part of driving a car. Almost all of them won't tell you something useful in the moment, or if it DOES something, it's probably too late anyway. One funny thing was when someone put a real temp gauge in, and saw the engine going up to 220 F, and then panicing- but that's when the high speed fan finally turns on- engine temp isn't a problem until north of 250F.
Anyway- always ask youself what the point of the guage is. Most, if not all of them, are better off recorded (and maybe deleted). Sometime more information isn't a good thing.
