max output of stock turbo?

buick83-T

83' T-type
Joined
Jun 4, 2001
Does anyone know the max hp output of our stock turbo. The flow rating is like 390 cfm correct?

Thanks in advance
 
I believe the Max flow on the stocker is around 570 CFM , that is what the stock Q-jet is set to flow. Correct me If I'm wrong guy's.
 
stock turbo

Has anyone ever went to an external wastegate on the carbed cars and removed the elbow and internal wastegate? A good bit of the 84-87 guys seem to have this mod along with the larger downpipe.
 
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