I just upgraded to a DBB turbo and ran my water lines from the extra port on the TT water pump and from the extra spot off the hard line at the back of the motor. When I shut the car down after it's maiden voyage I could hear the coolant boiling in the turbo. Sounds like I have equal resistance from both sources and no flow. Where are you guys grabbing your coolant sources for DBB turbos? Thanks.

 

Keep in mind that I already closed off the two lines on the upper water neck when I had my other turbo. The sad reality I'm thinking is that I have to take it off, drill and tap it with a new fitting.