Project I've been working on (delta pressure)

[DSteck]

http://www.youtube.com/watch?v=2U7jZm5zi-I

This is my fuel pressure converter. It takes the signal from the MAP sensor and a fuel pressure sensor and actively calculates the differential. Why do this? Because I was sick of a fuel pressure gauge that moves all over the place. I have a boost referenced system, so my gauge is changing with manifold pressure. This makes the warning function useless. I wanted my gauge to show the delta pressure instead so that if my system is operating correctly, it will always display 58psi (my base pressure). I'm basically interrupting the fuel pressure sensor signal and sending the gauge a modified signal.

I made the display just as a sanity check, but also just to play with the code a little bit. I only recently started getting into this stuff, and plan to make more things like a nitrous controller, boost controller, meth controller, etc.

[1998Ws6]

Looks good, what sensors are you using, I've thought of incorporating a ford FPRS sensor for this same reason.

[DSteck]

This one actually used a 2-axis accelerometer to just give me easily adjustable inputs. The actual one uses my MAP sensor and my Autometer fuel pressure sensor. The sensor cals are hard coded (I edit them and flash them in, no way to adjust on the box itself).

[meatbag]

The old defi link meter gauges would do this if you had a fuel pressure and map sensor. You could have it display differential pressure on the gauge.