[BR3W CITY]

DEcide on the turbo, and I'll help you pick a wastegate. Too large of a WG can make it tough to control at low boost levels (this is also partially determined by how the overall amount of exhaust pressure we have to work with, a function of both the displacement, piping and turbo selection). Too small of a wastegate will increase the chance of creeping and spiking.

Essentially, you want the smallest gate possible that still eliminates creep. This is why some will choose to go with twin-smaller WG's in place of a massive dump. Its easier for the smaller diameter valves/springs to have "crisp" control over the boost levels.

As with all things turbo, its 50% thermodynamics, and 50% putting-the-lime-in-the-coconut and guesswork.

Most likely your looking at a 38-45mm gates. The 50+'s are probably going to be way excessive for your overall pressures and boost levels.