which fuel pump are you using?
smaller fuel pump will burn out pretty quick and make yr car sluggish.
for the amount fuel reqiured i would use a v6 fuel pump.
with local gasoline you will loose 10% to 15% power on a jdm high c/r engine unless you use boosters in gas and flywheel hp wont show up at 165 because engine is designed to run on 100% ron avalaible in local gas station in Japan.
comparing silvertop to blacktop i think silvertop has longer engine life where Pakistani gasoline is concerned, because of lower c/r.
So when anyone tells you 20v is 165hp on Pakistani gasoline he's telling you a fib unless you reduce some car weight to gain back some lost power.
this is a nice engine , i myself would be interested in owning one of those motors.