External wastegate b12

[Alex]

Hello all. I’m running 1216 cc engine with a Garette gbc22 turbo and I would like to know what options there are for external wastegates and what size for this application. Will be running 15psi max. Completely Standard head and timing so nothing special. I’ve experienced boost creep at higher revs so I thought I’d ask the question. Cheers.

[colinworth79]

Personally i would try enlarging/ porting the wastegate hole in the turbine housing first but if you want to go external run a 38 or 40mm wastegate . Turbosmart or Tial . You could risk a Chinese job but  I know people to have problems with the diaphragm and also sticking open when there hot .  Be careful with placement in the collector as too much of an angle to exhaust flow you will still get boost creap .