just wondering: what actually governs the size of an external wastegate needed on turbo cars?
im currently gathering all the parts needed for my upgrade but looking into wastegates and what i would need to run on an rb25 with HKS GT3040 with
1.12 AR exhaust housing..???
i know what they do, BUT are they used in respect to the turbo size, engine size, boost level, or a combination of both?
think ive seen most people have used say a 38mm gate, but is a 35mm too small or a 45mm too big?
cheers