it isnt engine based problem, people on here a running tial setups aswell as big turbo's. didnt post here to start shit, i came here because most of you would prolly have upgraded turbo setups. Internal gated turbo's are most common with ls1.com.au.
thanks for the reply mate. i might just rip the wastegate out and have a look and see whats happening inside it. ive emailed tial and awaiting there reply regarding the issue aswell.
thanks for the reply also mate, boost controller doesnt run with the engine management, 2bar map sensor sorts out timing, pressure and fuel etc.