Reading Cam Deviation Values

[gabedrummin]

Thats strange the auctuator dont move till about 2500 rpm . Jeff from Pa told me to check at 4500 rpm. At idle they are closed as the rpm increases the auctuators lift to adjust the timming .????

[pilot4fn]

Originally Posted by gabedrummin

Thats strange the auctuator dont move till about 2500 rpm . Jeff from Pa told me to check at 4500 rpm. At idle they are closed as the rpm increases the auctuators lift to adjust the timming .????

Sounds like you're taking about Cam Actual Values here above.
Cam Deviation is diffrent item to check and should be checked at idle - at least for what I have read from all articles that I have seen...

[blue62]

I don't think the average person understands what cam deviation values (as it apply to the Porsche Vario Cam system) represents.
What does the Camshaft Deviation value really represent???
Deviation of cams from factory set point in degrees of timing in relation to crankshaft position???
Deviation from factory set point in degrees of timing in the relationship of Exhaust cam timing to Intake cam timing??

OR????????


Secondly I don't think the Cam deviation values change with RPM unless there is an issue with the mechanic's.
The important thing is to have the engine fully warmed up when taking readings.