IF the spring is a 12 lb rated springSweet I emailed him he sounds cool. Quick question my turbo is ran straight to wastegate 12lb spring I have bought and sent back 2 manual boost controllers now no matter how loose or tight I make them it maxes out my guage so I have to let go. I'm using same nipple on wg and just putting directly turbo to bc to wg same spot what gives I now realize maybe there's 2 different nipples on wg but I left it on the same it was already. And I tried to check vac line to see if it was ripped and burnt the shit out myself. Anyways if I take off MBC and just go wg to turbo it's still 12psi no issues with leaks on line. Should I be going to different nipple on wg or because my spring is 12lb? Or should I just get another spring for say 18lbs? Sorry for stupid question I'm just stumped
with a direct line from turbo to wastegate with nothing inbetween, you should hit 12 psi and only 12 psi
with a manual boost controller the minimum you will hit is 12 psi until you start opening the manual boost contoller bleed port then you will only make more psi.
if you want less you will have to change the spring.
inside the wastegate there is a diaphragm that controls the wastegate valve position which is vital to boost control.
the spring pushes on the top of the diaphragm to keep the wastegate valve to close it
and the vacuum line thats ran from the turbo to wastegate is connected to the bottom side of the diaphragm
so as you make boost pressure that pressure will overcome the spring pressure and open the wastegate allowing the turbo to slow down to maintain boost control.
hope you can make sense of that ^