Pelican Parts Forums

Pelican Parts Forums (
-   911 / 930 Turbo & Super Charging Forum (
-   -   WUR influence @ full operating temp (

930turbo 02-04-2007 08:23 AM

WUR influence @ full operating temp
Does the WUR have any influence on the mixture @ full operating temperature? In other words, does the bi-metal spring come completely off the control pressure springs once it's hot? Or, does the bi-metal always play a part in mixture control regardless of temperature?

RarlyL8 02-05-2007 09:55 AM

The bi-metal strip stops moving at normal engine operating temperature once the temperature at the WUR has equilibrated. If the temperature at the WUR is further increased or decreased the bi-metal strip will move accordingly.
To directly answer your question, I do not know if the bi-metal strip ever unseats itself. I doubt it due to the mechanical function it performs. The bi-metal strip has a range of motion that diminishes at the extremes. That range of motion is compromised with age, one reason why aging WURs go off-spec on their own, usually first seen as a lean cold start and the classic "chugging" at low idle.

All times are GMT -8. The time now is 05:14 PM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2021, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2020 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website

DTO Garage Plus vBulletin Plugins by Drive Thru Online, Inc.