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beepbeep beepbeep is offline
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Join Date: Jun 2001
Location: Sweden
Posts: 5,565
Quote:
Originally Posted by RarlyL8 View Post
The holes do lead to the compressor. Benefit? I think it is mostly marketing.
Many turbos will hit full boost before 3000rpm, I would consider them a lag monster if boost comes later than that.

The real ported-shroud does indeed offer benefits. But it doesn't have home-made holes. it looks like this:




And this is the difference:



If there are any old pilots here they might remember old 707's with "blow-in" doors on engines which were sucked open at takeoff. Ported shroud works in similar way but it's constantly "open" so you loose litte bit of efficiency to lower surge margins.

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Last edited by beepbeep; 11-06-2009 at 05:09 PM..
Old 11-06-2009, 04:52 PM
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