Go Back   986 Forum - for Porsche Boxster & Cayman Owners > Porsche Boxster & Cayman Forums > Boxster General Discussions

Reply
 
LinkBack Thread Tools Display Modes
Old 07-16-2014, 08:04 AM   #1
Registered User
 
epapp's Avatar
 
Join Date: Aug 2013
Location: Bay Area
Posts: 700
Garage
durametric weird values

Last night and this morning I was fiddling with a durametric (thanks shehardy) and the cam deviation was the main value I was after.

First, when I plugged the durametric in, it didnt auto-discover my type of car/ecu type so I put it all in manually, 1999 5.* engine control software...this is the first weird thing

Then, we started playing with the ability to turn stuff on and off ('Activations'). Some worked, like all of the cluster related things, but none worked for the engine activation...second weird thing.

Then I started looking at 'Actual Values' of the engine stuff, and most seemed to be fine, EXCEPT for cam deviation. (The cam deviation actual value checkbox to enable them are labeled 'Camshaft position 1 deviation' and 'camshaft position 2 deviation (USA models only) ...which seemed weird). What is 'position 1'?? Bank 1??

Now the value COULD be fine, but it seemed awefully suspicious that both were at -3.0 exactly, when the car was hot. So I let it cool and this morning I looked again at cold start up, and -3.0 exactly again.

Is -3.0 some default number if the durametric can't get real data, or is it probably true that, even though other activations don't work, the cam reading is real?

epapp is offline   Reply With Quote
Old 07-16-2014, 10:26 AM   #2
Registered User
 
Join Date: Jan 2013
Location: Phoenix, AZ
Posts: 231
I have the same issue with my Durametric turning on systems, suspect it the sequence in which I am hooking it up. Still, I have not had issues with the actual values. My deviations are at 6 and 3. I suspect yours are correct values and those look good, and they are stable....
runjmc2 is offline   Reply With Quote
Old 07-16-2014, 01:31 PM   #3
Registered User
 
epapp's Avatar
 
Join Date: Aug 2013
Location: Bay Area
Posts: 700
Garage
Thanks. Do yours change at all when warm versus cold?
epapp is offline   Reply With Quote
Old 07-16-2014, 07:45 PM   #4
Registered User
 
Join Date: Jan 2013
Location: Phoenix, AZ
Posts: 231
A little bit, if any.
runjmc2 is offline   Reply With Quote
Old 07-16-2014, 08:09 PM   #5
Registered User
 
thom4782's Avatar
 
Join Date: Sep 2010
Location: Foster City CA
Posts: 1,085
IIRC, the hot v cold value differences are far more pronounced when the car has variocams.

There is no default cam deviation value.
thom4782 is offline   Reply With Quote
Old 07-16-2014, 11:40 PM   #6
Registered User
 
epapp's Avatar
 
Join Date: Aug 2013
Location: Bay Area
Posts: 700
Garage
Well variocam is written on each valve cover and I have the variocam sensors that bolt up to each side...plus all m96 engines have variocam...right?


Sent from my iPhone using Tapatalk
epapp is offline   Reply With Quote
Old 07-17-2014, 03:27 AM   #7
Registered User
 
Join Date: Feb 2005
Location: It's a kind of magic.....
Posts: 5,160
Quote:
Originally Posted by thom4782 View Post
There is no default cam deviation value.
Spec is +/- 6.0 degrees
__________________
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 07-18-2014, 10:13 AM   #8
Registered User
 
epapp's Avatar
 
Join Date: Aug 2013
Location: Bay Area
Posts: 700
Garage
durametric weird values

And I suppose I should he happy with -3.0 on both sides. But some people have to the hundredths of accuracy and mine are just .0. What are the odds that both banks are exactly the same to two decimal places? 1/100,000?

OR is it that Shehadehd's 2000 with the 7.2 software report double digit accuracy and the 5.x software only reports single digit?


Sent from my iPhone using Tapatalk
epapp is offline   Reply With Quote
Old 07-30-2014, 12:14 PM   #9
Registered User
 
Join Date: Dec 2009
Location: Orange County, CA
Posts: 1,270
Quote:
Originally Posted by JFP in PA View Post
Spec is +/- 6.0 degrees
Hello JFP,

Somehow I am concerned with the position of the decimal point, does this picture looks Ok with you?

Gilles is offline   Reply With Quote
Old 07-30-2014, 12:55 PM   #10
Registered User
 
epapp's Avatar
 
Join Date: Aug 2013
Location: Bay Area
Posts: 700
Garage
I have never seen 4 decimal places. Durametric software could be doing fancy things with the cars reported value like rounding to different places depending on the reading. a <1 degree reading might report 4 decimal places, but thats the only reason I can think of why it would change reading to reading.

What year do you have?

Also, runjmc, are your readings 6.0 and 3.0, or some other decimal value?

Last edited by epapp; 07-30-2014 at 12:57 PM.
epapp is offline   Reply With Quote
Old 07-30-2014, 01:28 PM   #11
Registered User
 
Join Date: Dec 2009
Location: Orange County, CA
Posts: 1,270
Quote:
Originally Posted by epapp View Post
I have never seen 4 decimal places. Durametric software could be doing fancy things with the cars reported value like rounding to different places depending on the reading. a <1 degree reading might report 4 decimal places, but thats the only reason I can think of why it would change reading to reading.

What year do you have?

Also, runjmc, are your readings 6.0 and 3.0, or some other decimal value?
Epapp: My car is an '07 Cayman S
Gilles is offline   Reply With Quote
Old 07-30-2014, 02:05 PM   #12
Registered User
 
epapp's Avatar
 
Join Date: Aug 2013
Location: Bay Area
Posts: 700
Garage
interesting...

Something tells me the amount of precision has increased with newer engines/MY/ecu software
epapp is offline   Reply With Quote
Old 07-30-2014, 02:21 PM   #13
Registered User
 
Join Date: Feb 2005
Location: It's a kind of magic.....
Posts: 5,160
Quote:
Originally Posted by Gilles View Post
Hello JFP,

Somehow I am concerned with the position of the decimal point, does this picture looks Ok with you?

I would not be concerned, the late software versions tend to go out further in decimal places as you approach zero.
__________________
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 07-30-2014, 02:44 PM   #14
Registered User
 
Join Date: Dec 2009
Location: Orange County, CA
Posts: 1,270
Quote:
Originally Posted by JFP in PA View Post
I would not be concerned, the late software versions tend to go out further in decimal places as you approach zero.
JFP, Thank you for the confirmation!

Gilles 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 11:29 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