UPDATED: To anyone curious, I ended up purchasing a Megan Racing Adjustable Fuel Pressure Regulator and the Isis Fuel Pressure Regulator Adapter. It's been about a week and my SR20 runs SO much better. When driving around town, I do not have to rev the engine as high or boost to keep up with traffic (A problem I was experiencing with bogged and poor acceleration). When spooling, the car feels much faster and I can actually feel the turbo kick in, I am very happy now.
The car no longer emits the smell of gasoline anymore, either up near the engine or out of the exhaust.
In terms of fuel efficiency, on the highway i was only averaging 23 mpg max before changing my afpr. But on half a tank, I was about to travel from where I live to LA (about 50 miles each way) a total of 4 times before having to refuel. According to the math, I calculated about 29.6 mpg hwy, but mind you I was only traveling around 62-65 mph on the highway.
I hope this helps!
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