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yep, set the fuel pressure regulator at 3 bars with the vacuum hose disconnected. To be on the safe side though try not to make too much power over 500bhp at the crank. At 600bhp crank you need twin pumps.
Don't mess with 600cc injectors. Go with 700 or 800 - they will work just fine with just about any setup; I would even go 1000 but I think that's where idle problems come into play. I have 700cc and wish I had 800 - I have to run 4 bars base fuel pressure to flow enough fuel (injector rating varies in direct proportion to fuel pressure, so my injectors flow about 820cc/min at 4 bars).
GT-SS turbos feel damned quick. But 2530s are, in reality, faster. At 1.9 bars boost I run as fast as a Carrera GT, and that's with my grandma-shifting, losing all kinds of rpms and boost (I shift slow to take it easy with my gearbox) And who wants to be slow?
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