Re: 200kw vs 220kw AU engine
220kw engines got ported heads with larger valves and slightly higher compression, different cam with 1.72 roller rockers, larger 70mm throttle body and different exhaust and EEC programming.
250kw is fairly easy, only taking a cam change really. The Crane 2030/2031 cams have proven to give great power increases to the AU V8 engines. Getting the engines to rev to 7000rpm requires balancing and decent rod and main bolts/studs, a good valve train and the obvious EEC mods to remove the 6250 rev limiter, but reving the engine that high isn't really needed to produce good power.