'octane level'
Thread Starter
Newbie
Joined: Jun 2004
Posts: 83
Likes: 0
From: UK
hmm, so whats the point of it? knock can be caused through many things so i cant see a point of it simply lowering in relevance to the knock count?
or is that exactly what it is? another way of seeing knock?
ie if you didnt log knock, and you logged octane level and it showed 85% you can safely presume your getting some form of knock of the ecu is swapping to the 2nd timing or lower octane maps?
or is that exactly what it is? another way of seeing knock?
ie if you didnt log knock, and you logged octane level and it showed 85% you can safely presume your getting some form of knock of the ecu is swapping to the 2nd timing or lower octane maps?
Yes, it should be 100% at all times.
It's basically a trim value that the ECU uses to determine how well the car is running. Before it applies timing or fuel, the octane value is considered to determine how much of which map to use.
It's basically a trim value that the ECU uses to determine how well the car is running. Before it applies timing or fuel, the octane value is considered to determine how much of which map to use.
hmm, so whats the point of it? knock can be caused through many things so i cant see a point of it simply lowering in relevance to the knock count?
or is that exactly what it is? another way of seeing knock?
ie if you didnt log knock, and you logged octane level and it showed 85% you can safely presume your getting some form of knock of the ecu is swapping to the 2nd timing or lower octane maps?
or is that exactly what it is? another way of seeing knock?
ie if you didnt log knock, and you logged octane level and it showed 85% you can safely presume your getting some form of knock of the ecu is swapping to the 2nd timing or lower octane maps?
Yeah, if you are logging it and it is showing 85%, then something is wrong if it is not going back up to 100%.
Either you are knocking really bad, or something is possibly wrong with your formula.
Trending Topics
Yeah, amen to that one. For your octane level to be dropping into the 85% region, correct me if I am wrong, but you must be seeing some really hefty knock counts/numbers. I have seen on my personal car knock logs going up to very low 30's (Oops, he he) and my octane flag only dropped into the 95-96% region.
Yeah, I am glad I have mine running well now. That 95-96% was because of a typo I made while manually entering numbers into my ignition tables.
Now I very rarely ever see below 99.6%.....
Thread Starter
Newbie
Joined: Jun 2004
Posts: 83
Likes: 0
From: UK
i have a log from a poorly car someone bought yesterday and it shows knock of 38 on tickover! with octane level of 15, im sure this is totally messed up car, but im also sure octane level simply goes down with knock? will check some more car logs
Evolved Member
Joined: May 2006
Posts: 2,399
Likes: 6
From: UK
Evolved Member
Joined: May 2006
Posts: 2,399
Likes: 6
From: UK