you cant remap the standard ecu, and i dont think there is a chip available. the only easy way you can do it is the way i was gonna do my 4efe, i had bought a jdm ecu for the starlet (jap spec, which rev to 7200) and tried that, but the wiring was slightly different, so i needed to get it rewired. i never got round to it though. other than that you could try a corrolla 4efe ecu and see if you can get that to work, im sure they have a higher limit.