a few minor things i left out are electric fans, intake with a k&n filter, and a 240sx throttle body. when i made the 275hp pull the car was back to a 1:1 ratio regulator. that is one reason i went back to the standard 1:1 ratio like the factory. most factory fuel pumps will start to bleed off pressure around 80-85 psi, i'm not really sure where the factory z31 pump does this. the more adjustment i gave it for more fuel under boost the more the car really didn't like it, at the time i still had the factory fuel pump. now the one thing i totally forgot about was the fact that i had a cartech fmu on the car when i dyno'd 259. my car dyno'd 259hp before the gutted plenum. Which I am not sure if any company makes that.ΔΆ50-260hp is very accurate. With a stock base pressure of 37psi and assuming a linear fuel pressure increase will be safe, a 2:1 FMU will be perfect. So to safely run at 15psi~16psi of boost on stock turbo I need 66psi of fuel pressure. I don't have a gutted plenum, so I guess 250hp ~ 260hp is about as far as I can stretch (I don't know if my e-fan and UR pulley help any).
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