There's no bleed valve anywhere I can see (doesn't mean one doesn't exist just can't be easily spotted).
The car is going on a dyno in the next week or two and I'll have some more conclusive numbers for everything then.
Besides turbos car has full exhaust, apexi panel filter, Impul chipped ECU, splitfires, iritop plugs and seemingly more boost as far as power mods go.
They could be hybrids yes, doubtful though I'd think. Where's the part number located so I can cross reference it.
To know what the turbo's spinning down after the engine stops sounds like I'd need a basis for comparison so can't comment on that.