Methanol, O2 sensors, N2O solenoids.

[Michael F. Sargent]

I'll take a shot at these....

i/   Is methanol bad for EFI system components (pump/hoses/injectors)?
     I heard that it can be corrosive in this situation.

Automotive components designed for gasoline may cause problems. Aftermarket
parts are available which are designed for use with up to 100% methanol (M100).

ii/  Does the output of an oxygen sensor reflect the air-fuel mixture
     being correct FOR ALL FUELS? IE in a petrol engine at stoic
     (14.7:1) the voltage is in the 'transition zone' of ~0.2-0.7v

     Will this voltage 'transition zone' hold true for any fuel type
     at a stochiometric (ideal) air - fuel ratio?

I bought the MSD Rich-Lean Indicator, which is a heated O2 sensor and a small
box with flashing red and green LEDs. The instructions indicate that this will
show a both red and green lights to indicate a stoic mixture, for gasoline,
M100 and propane. There are no adjustments possible.

I don't know the answer to your question, but the above makes me suspect that
the answer is "yes".

iii/ Can Nitrous solenoids be 'dithered' by duty cycle (like a lot of
     idle air valves are)? The idea here is to make the onset of 
     nitrous delivery more smooth. (Assume the amount of fuel put into
     the engine is increased proportional to the nitrous amount)

The proportional NO2 systems being sold by NOS apparently do the same thing.
Write or call for their literature, and I'd guess you'll get enough info to
be certain.
                                                 Mike
+--------------------------------------------------------------------------+
| Michael F. Sargent   | Net: msargent at gallium.com | Phone: 1(613)721-0902 |
| Gallium Software Inc.|                           | FAX:   1(613)721-1278 |
+--------------------------------------------------------------------------+