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-   -   The Purpose of a 964 Idle Motor "Muffler" ? (http://forums.pelicanparts.com/porsche-911-technical-forum/1133811-purpose-964-idle-motor-muffler.html)

drabels 01-28-2023 09:50 AM
The Purpose of a 964 Idle Motor "Muffler" ?
 
Hi,

On the 964 intake system, there is a little "muffler" that resides between the 2-wire idle motor and the intake.

https://i.postimg.cc/Y42MJ12T/964-Id...or-Muffler.jpg

When we look at the later 993 plastic intake models, the idle motor was changed to 3-wire and plumbs directly into the intake without said muffler.

Does anyone know what is the purpose/function is of this muffler? Could it perhaps be related to the behaviour of the 2-wire idle motor, which actually needs engine vacuum to fully shut?

Asking because it relates to an EFI (for 911SC) project I'm still refining...

Regards,

Daniel


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