Wastegate flapper / flange contact - Miata Turbo Forum - Boost cars, acquire cats.

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Old 07-02-2013, 11:28 AM   #1
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Default Wastegate flapper / flange contact

So after years (2?) of having part A (turbo) and part B (Artech DP) it took me a driving said parts to the ceramic coater to realize I have a bit of an interference issue. To be clear: THIS IS NOT a reflection of Artech/Abe's quality of work since this is not the original Greddy turbo - the original had a broken ear and I managed to find an NOS leftover from a 3000gt kit with same bolt pattern but a larger flapper arm and a watercooled cartridge.

Anyway, since the flapper arm is a bit longer I'm getting contact at roughly 80-85% full sweep. I do not think this will cause any noticeable flow/creep issues. However, I am concerned about the longevity of the assembly with the flapper bottoming out on the DP flange.

So this leads to the question: Do I...

A, Say **** it and bolt it up as is
B, Create some sort of stop on wastegate stroke

-Zach
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Old 07-02-2013, 12:02 PM   #2
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sawsall it?
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Old 07-02-2013, 12:06 PM   #3
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if its not affecting boost control then it probably doesn't matter. when you say 80-85 sweep you mean out of 90 degrees? I'm pretty sure it never opens that much
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Old 07-02-2013, 12:09 PM   #4
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Quote:
Originally Posted by Leafy View Post
sawsall it?
For realz.

I'm concerned with long term fatigue/cracking. I'm tempted to just run it since the contact occurs pretty close to the end of the actuator stroke.

Should have gone EWG the moment the first turbo casting cracked

-Zach
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Old 07-02-2013, 12:14 PM   #5
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Its not really hitting with very much force there. I wouldnt be too concerned about it.
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