Depends on what ECU you have-if you have an early airstart it is probably a CP ECU made by Andy Low of Electrodynamics. In that case just set the max compressor pressure to 1400Mb (which will equal about 22#s of thrust. If you have one of the newer smaller ones made by Bob Price just set your max RPM down to about 124K or so. Whatever it is always a good idea to detune an older 1000. Scott