yea it is a big gamble, but it's only made worse over here because everybody makes out that it is so difficult that nobody will even attempt to do it.
you will probably struggle to run very low boost with only a 38mm gate, but there is so many determining factors, wastegate placement in relation to exhaust flow being the biggest, mine has a 9 psi spring in it, and it creeps to 13psi in the higher gears, but i run boost per gear anyway and i run higher than that in the gears that it creeps so it's never a issue.
what sort of manifold and turbo are you using and what sort of power are you chasing?
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