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Putting stock actuator back on RB25. HELP!

2.7K views 7 replies 5 participants last post by  spazz  
#1 · (Edited)
I'm trying to put my car back to stock boost (7psi) but i'm having problems... if anyone has a stock skyline setup (no boost controller) can you post pics of the wastegate and the gold actuator that has those 2 hoses running off of it? There's 2 hoses that come off of it and i think the turbo and wastegate hook up through an "F" fitting that hook up to the actuator thing... can someone post pics of it? it's on the driver's left of the engine... I pluged all the hoses back up but dont think I did it right... I'm only boosting 4 psi. I tried checking my old rb pics but they're all too blurry or dont have a good shot of the lines.

edit: there's 5 hoses... lol... there's a hose coming from the recirculation pipe, one from the wastegate actuator, one from the turbo.... the actuator and turbo one goto this little "F" fitting and then the last inlet of the F fitting goes to the solinoid and there's 2 nipples on the solinoid... i'm confused what 3 hoses goto the F fitting and what 2 hoses go to the solinoid.
 
#4 ·
Dude! your setup is WAY different on mine. It appears to be set up to work with the stock boost solenoid or something. If all you want to do is run the boost of the actuator spring, all you need is a vacuum source to the wastegate. Boost will press on the inside of the wastegate and cause it to open. That's why boost controllers work, becuase they decrease the amount of air going through, so the pressure has to be increased to open the spring. Plug up ALL vacuum lines that run anywhere else. Then, run a line straight from the turbo or any other vacuum source straight to the wastegate actuator. I don't know if the neo ecu's want to see vacuum through those lines, but I guarantee it will fix your boost problems.
 
#5 ·
s14-240 said:
Dude! your setup is WAY different on mine. It appears to be set up to work with the stock boost solenoid or something. If all you want to do is run the boost of the actuator spring, all you need is a vacuum source to the wastegate. Boost will press on the inside of the wastegate and cause it to open. That's why boost controllers work, becuase they decrease the amount of air going through, so the pressure has to be increased to open the spring. Plug up ALL vacuum lines that run anywhere else. Then, run a line straight from the turbo or any other vacuum source straight to the wastegate actuator. I don't know if the neo ecu's want to see vacuum through those lines, but I guarantee it will fix your boost problems.
problem with that is that the wastegate is stock on 4psi and the ecu makes it run 7psi with that little solinoid but if it's not hooked up right, it'll only run 4psi... that's what i'm stuck on now... there's a connector that plugs into the solinoid... i'm assuming it goes to the ecu... any chance that got severed or something? cuz i just left it hanging for a couple months.