Jump to content

Server Lease Renewal/Software Licenses

Our yearly server lease, software licenses, as well as hardware operating costs, ARE due Dec 4th, 2022. Our current donations have fallen far short of the funds we need to renew. Please remember the RennTech.org community is Member supported so please consider a donation to help...  THANK YOU!

Welcome to RennTech.org Community, Guest

There are many great features available to you once you register at RennTech.org
You are free to view posts here, but you must log in to reply to existing posts, or to start your own new topic. Like most online communities, there are costs involved to maintain a site like this - so we encourage our members to donate. All donations go to the costs operating and maintaining this site. We prefer that guests take part in our community and we offer a lot in return to those willing to join our corner of the Porsche world. This site is 99 percent member supported (less than 1 percent comes from advertising) - so please consider an annual donation to keep this site running.

Here are some of the features available - once you register at RennTech.org

  • View Classified Ads
  • DIY Tutorials
  • Porsche TSB Listings (limited)
  • VIN Decoder
  • Special Offers
  • OBD II P-Codes
  • Paint Codes
  • Registry
  • Videos System
  • View Reviews
  • and get rid of this welcome message

It takes just a few minutes to register, and it's FREE

Contributing Members also get these additional benefits:
(you become a Contributing Member by donating money to the operation of this site)

  • No ads - advertisements are removed
  • Access the Contributors Only Forum
  • Contributing Members Only Downloads
  • Send attachments with PMs
  • All image/file storage limits are substantially increased for all Contributing Members
  • Option Codes Lookup
  • VIN Option Lookups (limited)

Diverter valve/ changeover valve function

Recommended Posts

I wanted to ask the experts here if I have the correct understanding of the changeover/diverter valve system. In my 04 CTT I replaced the oem diverters with the evom diverters and assume that they function and are positioned the same way. Now for how I understand the system. The top of the changeover valve receives a connection from the intake manifold and gets a vacumn signal at idle or boost at acceleration. This pressure signal then travels through the perpendicular port from the top inlet port and ends up by hoses, connected to the nipples on each diverter valve. I am not sure yet where the parallel port at the bottom of the changeover valve ends up. If the signal on the diverter valve is vacumn at idle, the spring is open and air circulates from the perpendicular port to the bottom parrallel port. At acceleration, boost is applied at the nipples on the diverters as well as boost going through the perpendicular point from the intake to keep the diverter closed. Once shifting occurs or boost is released, air then circulates from the pressurized perpendicular port down through the parrallel port back to the cold side of the turbo. I am not sure either in what situations the computer manipulates the changeover valve to open or close the diverter under different situations. Does anyone know if the memory kink in the diverter hose on the passenger side can cause a problem. Also could a bad diverter valve closing properly cause hesistation during acceleration. I have read of people putting their diverter valves on backwards as well and not sure of the ramifications of this.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.