Hi All

Ok first thing i would like to know is what the car does when the ecu detects too much boost, every turbo car i have owned previously cuts the engine out like a rev limiter does but my rs just makes a funny noise and holds back.Is this normal? and second problem is when i welly it in second it cuts out at about 0.8 bar (roughly 11 psi i think?) but in any other gear it will allow me to boost just over 1 bar (except when i drop down a gear). i do have a chipped ecu on the vehicle but dont know how much boost its supposed to allow,
i have also tried a friends ecu which is supposedly unlimited boost, but had the same problem.
other than this the car runs fine and starts fine so im stumped.
ANY HELP MUCH APPRECIATED. THANKS