I have a simple 1.8 L honest engine, no cheats
, no vvt (variable valve timing, rotates the intake camshaft to retard or advance the intake timing) and no vics (variable manifold cavity size to help with resonance). I might upgrade to a VVT head, they drop right in. Maybe someday....
Re: Tube length vs wire length.
I opted for sticking the sensor on the firewall and running the wire from there. FI guys like to keep the pressure sensor as close to the manifold as possible. I've read arguments for both, running a longer tube and running a longer cable. The DIYPNP guys just run the tube right into the board and they swear up and down it doesn't hurt anything (very probably true).
I thought about it, there are two big issues, latency and attenuation. With latency electromagnetic beats sound every time. Attenuation, 5 feet of 22 gauge cable is 0.065 Ohm (according to some web calculator), well within margin of error of the adc at those voltages.
Speed of sound is 340 m/sec at sea level density, so it takes 1/(340/length) for a pressure wave to propagate through air (i'm being very simplistic, i seem to remember tubes where a special case). Attenuation through air, its a crapshoot (this is where i agree with using CPLD), and then you've got the rubber tube acting as a spring/shock absober...