im just in th stage on rebuilding my whole engine in my evo 3 after some serious detonation. just bought a garrett gt3076r for a steal and my question is how efficient would it be on th stock cams running around 25-28psi with this turbk. i have a mate selling off his engine parts and has a no expense spared 12000rpm head i can have which il looking at getti g down the road providing i can still get some serious power on the setup i have until then

 

if this help...i run 27psi on stock head on my evo 4 a gtx3076r and i was 412whp..

 

Here are my results with the GTX3076r showing before/after with no other changes made except the following:
Before: stock head/cams
After: CurtBrown porting/GSC S2's