Man i hat ethe rotten egg smell.
Sly, from what i have learnt about catalyic convertors, basically after aprox. 60,000km or a few years, they basically dotn work anymore. so there level of C02 is basically the same as a car without a cat. So if u did get pulled over, ensure that there looks like theres a cat there, being either a hollowed out one, or a straight pipe with the cat casing on it. If they test u and u fail, u will get another examination in which u can then put a new cat on(or in tyour case the original high flow one) and pass.
I think its only the huge fines when they see the the cat has been totally removed. So if u just make it look like its still there u should be good.
In regards to ur car, u must b making more then 230rwkws. the only thing i can think of is that ur injectors could be blocked, as i know of heaps of 33s that make really good power with stock fpr, injectors and 044 pump. Are u sure that u have an 044? (just checking )
Hmm otherwise there must be sometihn wrong, U say your inj duty cycle will hit 100 if u took out the cat? I think start by taklin out the cat and see what happens. If it leans out more, try add more fuel. Then u should check to make sure ur injectors are not blocked, as for a 2530 setup on a 33, u will not necissarly need a/m injectors.
also maybe u should send SydneyKid a pm tellin him about ur problem. Maybe he might know something.
u shoiuld make about 250rwkws with this turbo. Hope everything works out. Cya