DIY Turbo Discussion greddy on a 1.8? homebrew kit?

Effect of loose wastegate actuator

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Old 03-11-2012, 11:53 AM
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Default Effect of loose wastegate actuator

... loose by like < 1mm.

From dyno data.



It reminds me of Hustler's log vs. Absurdflow manifold torque curves... maybe it didn't give the log a fair shake, it had a loose wastegate.
Attached Thumbnails Effect of loose wastegate actuator-loose-wastegate-boost-plot.gif  

Last edited by JasonC SBB; 03-11-2012 at 02:33 PM.
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Old 03-11-2012, 12:20 PM
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Are you talking about tolerances in the WG mechanism or user error? I'd refute your assertion regarding user-error and a loose wastegate, but when you consider my build thread I concede defeat. lol
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Old 03-11-2012, 12:36 PM
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loose as in preload?
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Old 03-11-2012, 02:32 PM
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Ya it was cracked open at rest.
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Old 03-11-2012, 09:24 PM
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So you are showing that a loose wastegate flapper will yield the same peak boost levels but just spool slower?
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Old 03-11-2012, 10:39 PM
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Of course.

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