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

Post Reply
 
LinkBack Thread Tools Display Modes
Old 03-06-2021, 04:26 PM   #1
Registered User
 
Join Date: Aug 2017
Location: Tucson,az
Posts: 690
What do these Number's mean

at 700 RPM,.. Ign timing is 2.7 MS have no idea what that means

MAF bounced between 10-11 at idle 80 deg day,.

Cam deviation = #1 =8.95
#2= 3.98

I do know about cam deviation...

When I did a cam adjustment actavation on bank 1 & 2 the Idle stumbled,it did not increase like I thought it was suppose to

Thanks ! Frank

flmont is offline   Reply With Quote
Old 03-07-2021, 12:28 PM   #2
Registered User
 
Join Date: Aug 2018
Location: Woodland Wa
Posts: 1,291
Quote:
Originally Posted by flmont View Post
at 700 RPM,.. Ign timing is 2.7 MS have no idea what that means

MAF bounced between 10-11 at idle 80 deg day,.

Cam deviation = #1 =8.95
#2= 3.98

I do know about cam deviation...

When I did a cam adjustment actavation on bank 1 & 2 the Idle stumbled,it did not increase like I thought it was suppose to

Thanks ! Frank
What OBDII did you take the readings with?
Most of todays readers are made in China so things are lost in translation.
Ignition Timing is usually described in degrees of advance or retard. So no telling with your reading on the ignition.

The Maf signal on most OBDII readers I am familiar with are showing Grams per second or pounds per minute or kilo's per hour.
Some reference to weight of air over a unit of time. That is what a MAF sensor does it measures Mass Air Flow. Mass=Density=weight of air over time. So if you look at the readout for the MAF that 10-11 at idle is probably shown with gs or some similar abbreviation.

When you trigger the cams they are advancing by 25 degrees so yes I would think your idle would stumble.

Last edited by blue62; 03-07-2021 at 12:31 PM.
blue62 is offline   Reply With Quote
Old 03-07-2021, 03:25 PM   #3
Registered User
 
Join Date: Aug 2017
Location: Tucson,az
Posts: 690
Hello Blue62,. I used my durametric set up the enthusiast version. So then apparently I didn't have it on correct settings..?
flmont is offline   Reply With Quote
Old 03-07-2021, 04:29 PM   #4
Registered User
 
Join Date: Aug 2018
Location: Woodland Wa
Posts: 1,291
Quote:
Originally Posted by flmont View Post
Hello Blue62,. I used my durametric set up the enthusiast version. So then apparently I didn't have it on correct settings..?
There are no settings that can be changed in the Durametric program other then language.

Your ignition timing is described the same as my Durametric Pro. As "ms" so my guess is they assigned a time element instead of degrees to ignition timing. So "ms" would stand for milliseconds before TDC.

YOUR MAF signal is as I said kilograms per hour - weight of air over a unit of time.

Nothing you can change it is how the program is written.

blue62 is offline   Reply With Quote
Post Reply



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 12:02 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0
Copyright 2024 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page