I just went on the superchip site and they have the K11 listed
Nissan Micra
1993 - 2001
Engine type : Non-Turbo Petrol
Engine size : 998 cm3
Cylinders : 4
Original bhp : 54
Original nm : 80
BHP increase : 4
Price* : £293.75
Exactly how is IT done?
Since the early 1990s, most engines have been controlled by an on-board computer, the engine control unit (ECU), which amongst other functions, defines the ignition timing, fuelling and boost pressure for all given engine speeds and loads.
After extensive development and testing, we arrive at the optimised settings for your make and model of vehicle, ensuring that each Superchip is as individual as the software inside your ECU, safely eliminating those ‘performance compromises’.
In most cases this remapped programme is installed electronically and remotely through the car’s diagnostic port. There’s no replacement chip, and we don’t touch the ECU itself.
And we always test your vehicle before handing it back for you to enjoy, just making sure everything is operating as it should be.
However this is fairly interesting, as I believe the only way to re-map the K11 ECU is to use the methods that Micra_pete does. Which I assume isn't that simple.
The best option is to use a piggy back ecu.
But on a standard CG10 the gains will still be negligable.
The best and easiest thing for you to do is put a Janspeed Manifold on for £200 that will give you a more than 4bhp gain that they're quoting for £265