welcome Ian
just bear in mind that in theory, a box
could invalidate your warrenty too...
Without wanting to get into the whole debate about false claims under warrenty if your engine goes pop, these are some things you might want to consider.
Remap
There is
apparently a 'counter' somewhere in the ECU which keeps a record of how many times the ECU has been changed.
Some companies claim to be able to reset the counter, so that the new map doesn't show here. Not sure if Celtic or SuperChip do this.
The map can be taken off (by the company) at any time (but see above about counter)
SuperChip include their own warrenty in the price of the map, but obviously you woulld need to see the small print and decide if this is of any use to you.
Box solutions:
typically increase power by increasing the amount of fuel being delivered.
Unlike the remap option, these boxes do not, and
can not affect the turbo.
This is why they 'only' give 15-20bhp increase instead of the 40-45bhp a map can give.
Whilst you can indeed remove the box yourself (instead of the tuning co having to remove the map), it has not been proven whether or not a dedicated technician could spot the signs of one having been fitted.
horses for courses
