Just got a walbro 255lph fuel pump put in my civic. Stock pressure was 45 psi, now its 50 psi. Should I turn it back down to 45, or leave it at 50? Got a b18c in a eg hatch. Anyone?

 

My walbro did the same thing.
I'd keep it at 45 if it's stock.
50 if it's modded

 

Was there something wrong with the stock pump? Unless you are making more than 300hp, the stock pump supplies plenty of fuel.

What you really need is an air/fuel meter to tell you what your mixture is looking like. On my car, I had to REDUCE fuel pressure when I went to larger injectors.

SCott

 

anyone else?

 

I would turn it down.

 

wat mods do you got in your b18c?

 

aem cai, dc 4-1 header, 5zigen catback exhaust, skunk2 IM, skunk2 p28

 

i would at least adjust to 47-48 psi... w/ all those bolt on mods...