I am currently doing a GT2871 turbo project on the S3 8L. I would like to know which PSI springs people are using in the wastegate and bov/diverter valve with this setup. Current setup is... Rebuilt engine with forged rods. ATP cast manifold (T3). ATP turbine housing (0.63 A/R). Custom 3" down pipe. Custom 3" catback. Wagner intercooler. Forge diverter valve. 38mm Tial external wastegate.