Fuel Pressure Regulator options

[Ramjet555]

I've just swapped the Holley carb for a Fuel Injection manifold
have a pre filter of 100 micron, post filter of 10 micron
and the OSIAS fuel pumps are rated at 380 LPH ( 97GPH at 73PSI
that has an inbuilt check valve.

https://www.amazon.ca/dp/B0BZVQYN7Y?psc=1&ref=ppx_yo2ov_dt_b_product_details

I'm concerned that the standard vacuum controlled Fuel Pressure Regulator at the end of the rail
may not be able to handle the pressure relief function.

https://m.media-amazon.com/images/I/61exHICwsgL._AC_SL1500_.jpg

The regular pumps appear to be about 230 liters (60 GPH) per hour and are handled
in the Subaru cars at least, by the Fuel Pressure Regulator.

Has anyone put in an after market Fuel Pressure Regulator on a 2.2 or 2.5?he 1/8 PNPT Fuel Rail Adapters, the same on most Subaru's
Mine is an EJ22 EFI

https://m.media-amazon.com/images/I/619HFThBxJL._AC_SL1500_.jpg

 

[lanichol]

The pressure on the front of the fuel rail is 43.3# for the Subaru injectors.
Any pressure above 43.3# on the fuel rail you will be jacking with your air/fuel ratio, running rich, possible injectors leaking.
Is this the Subaru ECU?
You will be burning roughly 6 gal/hr.

Simple fuel rail gauge from Amazon:
Mechanical fuel gauge before injection rail (43.3#) should not bleed off
https://www.amazon.com/dp/B0C2YDP4C8?psc=1&ref_=cm_sw_r_cp_ud_ct_J5TF7G3SVWBWS5PZ7WP1
3/.8 barb fuel pressure gauge fitting adapter with 1/8 npt sensor gage port
https://www.amazon.com/dp/B0CQTDPTWQ?psc=1&ref_=cm_sw_r_cp_ud_ct_PJGA7ZN3BGCF1EJAE26Y