Boost/ Actuator problem.

[devil_child]

So, for a few months now I've only been running my rb20 on 12 psi of boost, I just got my new injectors in and have been wanting to tune the car to run 20 psi for racing. Dont worry its not a stock turbo.

The problem is I can't get the boost to raise over 12 psi. With my AVC-R I cant turn it up. I even hooked up my old MBC and all it does is creep out to around 14 then back down to 12.

The actuator itself is adjustible, but I have it adjusted so the door is pretty tight.

Do you guys think my actuator is bad, or is it something else?

[devil_child]

any ideas?

[Darius]

I would be a little concerned about trying to run 20 psi with only tuning on an AVC-R.

As for the lack of boost, I'm not that experienced in troubleshooting. Someone else should chime in on this.

[devil_child]

dude I rom tune it with switchable tunes..... I dont just crank up the boost and go wheeeeee. think about it, how else would I run 440s.....

[Darius]

LOL you didn't say anything about that in your post so I assumed you were just looking to go wheeeeeee!

[Vkoslak]

Oh my God! There was this guy and he came over, and he was like, "Weeeeeeeeeeeeeee!"Oh my God! i went over to my mom and she'd be like "Weeeeeeeeeeeeeee!"That's so funny, cause i went home, and i said "Hey Dad, Weeeeeeeeeeee!"Oh my God! And then there was this guy and he goes, "Hey, i gotta knife" and I go "Weeeeeeeeeeee!"

Sorry, I had to.

I had 14.6 psi today on my rb20det with 550cc injectors using a blitz sbc. If I turn it up past 40set, it misses :/

Have you checked for boost leaks at 12psi or higher?

[devil_child]

funny thing is when it gets in the 30s outside, i can hit 14psi. neway, hooked up the leak tester, and nothing is leaking. =/

[DriftX]

Weak actuator spring?

Im not sure what manifold you are using, maybe it is time to switch to a nice external setup.