I've been trying to lower the boost pressure from 10 psi to 6-7 psi by adjusting the length of actuator arm. I've already adjusted it three times. Right now its about an inch longer but I'm still getting same boost pressures across all gears.

Here is the pictures after I lengthened the actuator arm. You can see the color difference on the actuator arm in the first picyure. That's how much I lengthened in day one. Later, I lengthened it even more in the second picture. But still getting the same results. There is plenty space there for the arm and flapper to move. This is very strange. Anyone has a clue why?



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does the flapper move? maybe it seized up.

 

Well look at the last picture. That thing holds the actuator arm is not vertical. Meaning the flapper is open. But weird thing is, Im still able to build 10 pounds of boost...I shouldnt be able to make any boost at all if its flapper is open all the time.
Before I adjust the actuator arm, it was vertical and it was making 10 pounds of boost too. This make no sense.


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for starters, you adjusted it too far one way, hence why its open.

internal wastegates have a minimum spring pressure, if you cant get it below 10psi its either that its a 10psi wastegate or you're having really bad creep issues,

 

Im pretty sure the spring was set at 6-7 psi preload. The last owner raised it up to 10 psi.

 

could have over adjusted it and damaged something

 

humm....any good Hondata flashpro tuner around in GA?

 

mainstream performance, digital box tuning, etc