Go Back   986 Forum - for Porsche Boxster & Cayman Owners > Porsche Boxster & Cayman Forums > Performance and Technical chat

Reply
 
LinkBack Thread Tools Display Modes
Old 09-30-2014, 04:55 PM   #1
Registered User
 
jaykay's Avatar
 
Join Date: Sep 2009
Location: toronto
Posts: 2,276
Durameteric Activations - Cam Change

With the ECU under control of the Durametric software, what is the effect (if any) of activating the cam shafts(...I believe it is called cam shaft change in the software)? At idle the cam shafts will already be activated...and the solenoid won't de-energize until 2500 to 3000 rpm IRC.

Will it just reverse the position? I wanted to try this to see if it would settle my cam shaft deviation numbers or promote a change when returned to the initial position and compared to previous data
__________________
00 986 S....with a few tweaks
jaykay is offline   Reply With Quote
Old 09-30-2014, 05:13 PM   #2
Registered User
 
Join Date: Feb 2005
Location: It's a kind of magic.....
Posts: 5,081
Quote:
Originally Posted by jaykay View Post
With the ECU under control of the Durametric software, what is the effect (if any) of activating the cam shafts(...I believe it is called cam shaft change in the software)? At idle the cam shafts will already be activated...and the solenoid won't de-energize until 2500 to 3000 rpm IRC.

Will it just reverse the position? I wanted to try this to see if it would settle my cam shaft deviation numbers or promote a change when returned to the initial position and compared to previous data
The answer depends upon the year of the car (VarioCam Vs., VarioCam +). When the Durametric activates the solenoid on a VarioCam car, the cam will move around 25 degrees. On a plus car, it is more complicated as the cam movement is variable rather than a single step, plus the later cars with lift control will also be engaged, but you should still see positive movement in the cam angles as well.

The Durametric activation system is for testing components to simply make sure they work (on-off), not to produce a specific measured cam angle change. On the VarioCam car it is predictable because the system simply moves the cam in one step rather than the more variable plus system. In any case, I do not believe that test the VarioCam will solve your issue.
__________________
Anything really new is invented only in one’s youth. Later, one becomes more experienced, more famous – and more stupid.” - Albert Einstein
JFP in PA is offline   Reply With Quote
Old 10-01-2014, 12:15 PM   #3
Registered User
 
jaykay's Avatar
 
Join Date: Sep 2009
Location: toronto
Posts: 2,276
Quote:
Originally Posted by JFP in PA View Post
The answer depends upon the year of the car (VarioCam Vs., VarioCam +). When the Durametric activates the solenoid on a VarioCam car, the cam will move around 25 degrees. On a plus car, it is more complicated as the cam movement is variable rather than a single step, plus the later cars with lift control will also be engaged, but you should still see positive movement in the cam angles as well.

The Durametric activation system is for testing components to simply make sure they work (on-off), not to produce a specific measured cam angle change. On the VarioCam car it is predictable because the system simply moves the cam in one step rather than the more variable plus system. In any case, I do not believe that test the VarioCam will solve your issue.
Thank you....so a cycle for 25 back and out.. yes it's not a vario plus....I was hoping that actuating the solenoids a few times might stabilize my readings or make them unstable.....perhaps this could point to a wear pad issue on the vario cam chain pads or weakness in the solenoids. IRC they are energized at idle...maybe the holding power is not what it should be

Yes the solution would be tear down and replace
__________________
00 986 S....with a few tweaks

Last edited by jaykay; 10-01-2014 at 12:18 PM.
jaykay is offline   Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -8. The time now is 04:20 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page