Fluctuating Boost dyno tues help!!

[yabeet]

Ok so I just recently put on my 2871 .64 w/ the adjustable actuator that came with it.
First dyno I went to without the blitz controller the boost would hold steady at .9 bar.
Then when we flicked on the b.c once the car hit full boost it would fluctuate 2-3psi.
So automatically I was like boost controller is faulty. So I get an AVCR which my bro previously had installed and worked great.
Same thing again, with it off a steady .9 bar. Turn the thing on and put up the boost a little bit and again fluctuating 2-3psi again!
At this point Im thinking must be the w/g actuator but without the b/c on it will keep it steady.

Any ideas from anyone would be great, I have a dyno tues morning then straight after a track session :rant2:

[yabeet]

Looked at turbobygarrett.com to check my actuator:

743347-4 features a low boost actuator adjustable down to 6 psi

Could need a stronger actuator?

[codyace]

Did you play with the gain at all?

You're going to always have issues with internal gate like this, and controllers...they simply suck. If anything, try putting a little 'preload' on the actuator arm and re install it

[yabeet]

In that case Im just going to adjust it via the actuatyor arm, thanks Cody.

[codyace]

Certainly play with the 'mechanical' aspect first, andd then play with the controller. With internal gate, I liked a LOT of gain