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millermilla

21 Posts
Member #: 9126
Member

Burgess Hill, West Sussex

13th Jan, 2011 at 10:06:37pm

Hiya,

I have just fitted a Bailey piston type dump valve and have connected the actuating pipe to the inlet manifold. The dump valve works fine but I notice at idle throttle closed the dump valve is open as there is a vacuum in the inlet manifold. As a result of this the dump valve is open to atmosphere so surely unfiltered air can now enter the plenum through the dump valve? Is this correct?

Thanks

Turbo Phil

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4641 Posts
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My sister is so fit I won't show anyone her picture

Lake District

13th Jan, 2011 at 10:23:14pm

Yes. This is why some dump valve featurea filter.

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tadge44

3006 Posts
Member #: 2500
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Buckinghamshire

14th Jan, 2011 at 10:04:12am

If you fit a recirculating dump valve and put the dumped air back into the inlet between the air filter and the turbo inlet there would be no problem.

millermilla

21 Posts
Member #: 9126
Member

Burgess Hill, West Sussex

14th Jan, 2011 at 07:18:01pm

Thanks I was just worried about the unfiltered air but I guess as it's only ever open on idle the chances in ingesting some crap are pretty slim
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