Speeduino MPFI vs Holley Sniper EFI or MPFI vs TBI(my observations)

Nailed it. UTP (unshielded twisted pair) is my bread and butter. The twist enables the signal to be very quiet. you split a pair (ie tip of 4 and tip of 5) and youll get dial tone but it will be noisy as the signal cant 'neutralize' itself. Same effect as when you get an imbalance (bridge tap on one side) you get noise. I found some twisted and shielded pair at my central office: perfect for a VR or hall effect run. Its called twin-axial or bi-axial. 2 twisted cables under a braided shield. ground the braided shield at the ECU board side only.