Here are the fastcgi process pool defaults as defined in %windir%\system32\inetsrv\config\schema\iis_schema.xml.
<attribute name="maxInstances" defaultValue="4" />
<attribute name="idleTimeout" defaultValue="300" />
<attribute name="activityTimeout" defaultValue="30" />
<attribute name="requestTimeout" defaultValue="90" />
<attribute name="instanceMaxRequests" defaultValue="200" />
<attribute name="protocol" defaultValue="NamedPipe" />
<attribute name="queueLength" defaultValue="1000" />
<attribute name="flushNamedPipe" defaultValue="false" />
<attribute name="rapidFailsPerMinute" defaultValue="10" />
Thanks,
Kanwal