Well, I noticed in the past that it really doesn't open up all the way, and just yesterday I think they got completely frozen shut because I'm generating a whole bunch of boost. I have a tire pump with gauge on it that I use to apply pressure. It always seems to work well. But I still think I should be able to move it by hand.
You shouldn't be able to move it by hand. What does your aftermarket boost guage(if you have one, if you don't this is a real good reason to get one)tell you. If they were frozen shut, you'd boost really high and blow your engine. If you boost guage is reading pretty normal(9psi-12psi) then I'd say it's fine.
I built an electronic boost guage. Its calibrated to be good for +-1 psi, which is probably a lot better than most analog boost gauges. After I thought they closed shut, the pressure in the plenum starts out about 20 psi and bleeds down to about 17-18. I haven't been reving my engine high in this state at all.
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