Fuel question

Mx6GT91

Member
:
89/Mazda/Mx6
My friend wants to get a bigger fuel pump Walbro 190lph or 255lph. I wanted to know how much boost can just a fuel pump and the stock injectors handle?? I was thinking about 12psi, I know these motors are high compression but I think with a 190lph 12psi should be no problem.

Right now the car has a filter (S2B full intake) and boosting about 10psi.
A 3in exhaust is going to be added soon also.
 
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