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View Full Version : Problem with Internal Wastegate adjustment


xyflz
05-16-2011, 01:31 PM
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?

http://img14.imageshack.us/img14/7497/day1vc.jpg (http://imageshack.us/photo/my-images/14/day1vc.jpg/)

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Killa_D
05-16-2011, 01:35 PM
why would you want to run less boost?? also there's a reason why your running 10 psi i believe a lack of a sensor is not making it run 7psi but i say just leave it alone my 2 cents.

!Zar!
05-16-2011, 02:58 PM
It looks like your wastegate flapper door is completely open as it sits right now.

wtffffffffff

camaro379ss
05-16-2011, 03:24 PM
Why are you wanting to run 6-7psi? Just curious...

xyflz
05-17-2011, 08:24 PM
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.
http://img545.imageshack.us/img545/6681/img20110517164005.jpg (http://imageshack.us/photo/my-images/545/img20110517164005.jpg/)

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The reason I wanna run less boost is I wanna be safe right now until I get a digital boost controller.

!Zar!
05-18-2011, 12:02 PM
Are you sure your boost gauge is even reading properly?

xyflz
05-18-2011, 09:41 PM
Yes. My boost gauge reading and datalog values match. I feel the power.

codyace
05-20-2011, 11:09 AM
Even if held wide open, you should only see a psi difference at most by lengthening the rod. The turbo is still going to create 'boost' regardless of it being held open all the way or not. I've never seen anyone have much luck at lowering boost with an internal wastegate as they simpy can't vent enough exhaust to work properly.