dave,

not 100% sure about remapping, but a stage 1 chip is designed with a purpose i.e. to run a stage 1 set up !!! i.e. 1 bar boost ignition an fuelling to suit.

Most chips will probably allow the engine to over boost slightly say 18 psi, but if you want more power an upgrade to stage 2/3 would be a good idea.

Then live mapping and who knows what next !!!

cheers,

paul