Ignition Timing Question
Feb 16, 2007, 10:02 PM
#1
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Ignition Timing Question
I am a new user of EVOScan and have a question related to ignition timing.
I have a tune that was done by a pro tuner and the car runs great. After doing some logging I found that the car was getting more knock counts than I was comfortable with.
I have done some changes to the ignition timing and fuel maps and am really happy with how the car runs.
Here is the question . . .
I have noticed that when looking at the log that where I do get a 1 or 2 (at most) count of knock that the timing value shown (at the knock count) does not exist in the timing map.
Does the ECU interpolate the timing values when moving from one cell to the next?
The reason I ask is if that's the case I should be maybe looking more at the timing in the load cell before the one I would think you would adjust to eliminate knock.
Maybe this would explain it better. In the example below if I was getting a knock count at 4500 and Load of 140 and the Evoscan log showed say 16 degrees of advance would it be better to adjust the timing in the 120 column?
Hope this long winded question makes some sense
Thanks,
Bob
I have a tune that was done by a pro tuner and the car runs great. After doing some logging I found that the car was getting more knock counts than I was comfortable with.
I have done some changes to the ignition timing and fuel maps and am really happy with how the car runs.
Here is the question . . .
I have noticed that when looking at the log that where I do get a 1 or 2 (at most) count of knock that the timing value shown (at the knock count) does not exist in the timing map.
Does the ECU interpolate the timing values when moving from one cell to the next?
The reason I ask is if that's the case I should be maybe looking more at the timing in the load cell before the one I would think you would adjust to eliminate knock.
Maybe this would explain it better. In the example below if I was getting a knock count at 4500 and Load of 140 and the Evoscan log showed say 16 degrees of advance would it be better to adjust the timing in the 120 column?
Hope this long winded question makes some sense
Thanks,
Bob
Feb 16, 2007, 10:43 PM
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At WOT I wouldnt think you would be at 140 Load
Timing doesnt run that simple. Its in a curve, hence the term timing curve.
Where are your logs
1-3 Counts is livable
Timing doesnt run that simple. Its in a curve, hence the term timing curve.
Where are your logs
1-3 Counts is livable
Last edited by Ph3n1x; Feb 16, 2007 at 10:51 PM.
Feb 18, 2007, 08:26 AM
#5
Evolved Member
Hi
Personaly I would never run a map like that in my car. It has no scaliing between the load cell in a lot of areas. If you start to run in load cells outside those you normal transition though. The map really should look graduated like the stock one. The idea is that if you run part throttle the engine will be tuned as optimaly as it is at WOT, if you run higher load cells then again the car will be also well tuned.
I would consider looking at the stock map and working up from that. If you have been sucsefull in modifiying the "pro" tune then you will be able to adjust the stock map to get the tune you desire.
MB
Personaly I would never run a map like that in my car. It has no scaliing between the load cell in a lot of areas. If you start to run in load cells outside those you normal transition though. The map really should look graduated like the stock one. The idea is that if you run part throttle the engine will be tuned as optimaly as it is at WOT, if you run higher load cells then again the car will be also well tuned.
I would consider looking at the stock map and working up from that. If you have been sucsefull in modifiying the "pro" tune then you will be able to adjust the stock map to get the tune you desire.
MB
