early 1.8s cant be remapped, the ecu has no eeprom, but then can be chipped. later ecu's can be remapped, but few websites seem to list it. in both cases the peak gains are usually claimed to be approx 10bhp and 8lb/ft, but peak gain figures are meaningless. personally i would also recommend you buy a 20v instead, i loved my 1.8 but i wish i bought the 20v because the costs aren't much different.