got a problem with my single turbo conversion...

[justFD3s]

Hi

first my spec:
To4z HKS kit
Engine Bridge & Side ported
decat pipe
greddy titan muffler
airpump removal kit
apexi power fc

at 220kmph the car lost a very short time the boost,
after that the car did sound different and was shaking a little,
but it had still the same power
after 300 km it lost again the boost for a short time,
but after that the engine revs very bad, its shaking enorm at idle and it feels like i have only got a 100 hp

i have just checked the turbo, but it looks fine
so what could be the problem?
wastegate, engine (apex seals...) or just some vacuum tubes?
what should i check?

could it be because 2 weeks before i removed the racing cat(100cells)?

thanks for the answers

greetings Patrick

[memski]

Sounds like you\'ve lost an apex seal or two, compression test it dude.

[Red and Single]

What AR is your hotside ?