Wow... damn. My plan was to leave the turbo stock, add an intercooler somehow, and turn up the full load screw inside the otherwise stock injection pump. I'd be happy with ~180hp, and I'd like to retain decent economy (30mpg is nice!) for freeway cruising, which should be OK with just an intercooler, right? I was thinking of removing the catalyst from the exhaust (USA models added a cat in the main downpipe, under the passenger's feet) but wasn't sure if that would gain any power or not. I turned up boost from 12psi to 15psi but there was no power gain, probably need to tweak the pump a bit, but can't go far without an intercooler. Any photos / websites with more info on 603 mods??

Stupid question - where should IP timing be set for best power? I find that economy improves when set at 13.5-14.0 (spec is 15.0, +/- 1.0) but I wasn't sure if that was best for power gains.