what fuel pressure?

[tcavenger99]

I have installed an ajustable fmu with amsn thanks to your guys help (thanks again). Now one more question, i have hooked a fuel pressure gauge up to the fuel rail and it reads 55 psi , when i tighten the screw on the fmu in increases .How much pressure should i have for boost ? plus i am getting a boog out feeling sometimes when i floor it from a stop when boost hits, is this due to low fuel pressure .

specs---warlbro 225 fuel pump
high flow injectors
missing link
fmu

 

[Street 2G]

What size fuel injectors?

 

[tcavenger99]

340cc ingectors

 

[Locke]

What is your fuel pressure while in vacuum? With larger than stock injectors, you will want lower than stock fuel pressure to keep from running so rich.

Consider investing in a wideband.

 

[Street 2G]

at idle my fuel presure sit right between 40 and 45 psi. but my gauge isnt on the fuel rail, its mounted on my fuel presure regulator so i dont know if there would be a difference there. so are you asking what your fuel preasure should be when you hit boost?

 

[tcavenger99]

ok at first my fuel pressure was at 45 them i raised it to 55 by tighting the fmu screw. this was all done at idel

 

[Street 2G]

so your question is what should your fuel presure be when your in boost? im sorry just a little confused.

 

[tcavenger99]

right what should my pressure be sorry if i confused anyone

 

[Street 2G]

acording to the hahn racecraft manual at idel it should be at about 40 psi for their kit im running alightle higher though, aroungd 45 to 50 psi at idel