this is just a random thing.. but i saw someone postin, that if 1 turbo dies.. it halves the boost???
just thought id let u know and everyone else that doesnt know, that twin turbos dont work like that.. 1 doesnt make 3.5psi and the other one another 3.5psi.. otherwise ud be able to run more than 14psi on a ceramic turbo.. they both make the same boost.. but because theres 2 turbos, the actual flow is twice as much.. so if one T28 makes 400cfm @ 7psi.. then two will make approximately 800cfm @ 7spi..
as for ur no boost... its not gonna be turbos.. i still think its ur bovs.. theyre sizeable enough to leak all ur boost, without stallin ur car (they are a valve after all..) what might be happening is a vacuum line going to ur bov's might have been severed.. They need pressure in the line to stay closed and then the pressure in the intercooler piping plus the vacuum in the vac lines (going to bov) opens them up during no throttle.. maybe theres no pressure in the "vac" line to keep it closed..