yeah thats a bit of a bummer.
i got same mods just a bigger 50mm ext gate, i control my boost from the gate spring, has 14psi spring and ive tighten it to hold bout 1.4bar 19psi in top gears.
im not sure on exact power figure as it kept slipping the tyres from camber on my mechs dyno but was around 320rwhp b4 the slipping,
my mates 33 with gt30 and all the goodies has 350rwhp on 14psi and we are pretty even if we have 100-200 rolls maybe even half a length infront...who knows
id love a gt35r though...make same power on 1 bar not 1.4