The fuel ecu doesn't have any potentiometers or a chip, if that's what you mean. Just a few op-amps and tons of resistors, capacitors and transistors.
Jamie, I take it from your nic that you have a S1? The air-flow disc of a S1 metering head does travel much further then the disc of the S2. I would therefore presume that it also fuels further than the S2. If somebody has ever investigated this, I would be very interested to know if it's the case.