yea, what he said. for just 5psi don't even bother with bigger injectors and all. just get an fmu...that's all you need. maybe later on when you decide to run more boost get the 450's...or 440's like me. the throttle is a little choppy with the afc hack, but it's not too noticable once you get used to it.

if you have a fully built motor then why are you only planning to run 5psi?? also...when you do decide to run more boost, get 440's or 450's, an afc, fuel pump (i have the walbro 255lph) and get it tuned by a pro.

 

he is only running 5psi because his compression is 10.8:1.......high compression + lower boost = more power then low compression at higher boost...but it takes better and better tuning the higher the compression and boost go.

 

high compression + any boost = lots more problems..

 

not with proper tuning....the lower the boost you run the faster and easier you can spool up said boost...soooo if you have a really good tuner and has experience tuning high compression low boost motors...then it is a great advantage....cause you can spool up 5 psi all day.