Turbo Miata: External Wastegate Dump Sound

Testing out the new Tial MVS 38mm external wastegate on my turbocharged 1.6 liter 1992 Miata. In this video it is running the stock 1.6L long block, an Ebay cast turbo manifold, Ebay 50 trim T3 turbocharger, Ebay intercooler, 2.5" exhaust, 550cc injectors Coolingmist.com water/methanol injection and a 1G DSM 4G63 ECU. See pictures, build stories and more at: http://miata.turbomirage.com/