Timing in Ecuflash Vs Logged timing.
May 16, 2013, 10:07 AM
#32
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No. Ignition timing is measured in degrees before/after TDC. Reducing the compression does not affect that, since TDC is always the point where the piston is highest in the bore on the compression stroke. An 8.8:1 engine and a 7:1 engine both have 10*BTDC at the exact same place...10* before top dead center.
Now, if you were asking whether or not the engine could take more timing if you dropped the compression, then the answer is yes. By reducing compression, you reduce cylinder pressures (more or less), which helps reduce detonation. If the 8.8:1 engine was fine at 10* BTDC, but knocked at 11*, the 8.5:1 might be fine with 12* BTDC, and knock at 13*. This is purely an example, not fact. You've got to tune it to find out.
Now, if you were asking whether or not the engine could take more timing if you dropped the compression, then the answer is yes. By reducing compression, you reduce cylinder pressures (more or less), which helps reduce detonation. If the 8.8:1 engine was fine at 10* BTDC, but knocked at 11*, the 8.5:1 might be fine with 12* BTDC, and knock at 13*. This is purely an example, not fact. You've got to tune it to find out.
May 16, 2013, 05:38 PM
#33
Evolved Member
No. Ignition timing is measured in degrees before/after TDC. Reducing the compression does not affect that, since TDC is always the point where the piston is highest in the bore on the compression stroke. An 8.8:1 engine and a 7:1 engine both have 10*BTDC at the exact same place...10* before top dead center.
Now, if you were asking whether or not the engine could take more timing if you dropped the compression, then the answer is yes. By reducing compression, you reduce cylinder pressures (more or less), which helps reduce detonation. If the 8.8:1 engine was fine at 10* BTDC, but knocked at 11*, the 8.5:1 might be fine with 12* BTDC, and knock at 13*. This is purely an example, not fact. You've got to tune it to find out.
Now, if you were asking whether or not the engine could take more timing if you dropped the compression, then the answer is yes. By reducing compression, you reduce cylinder pressures (more or less), which helps reduce detonation. If the 8.8:1 engine was fine at 10* BTDC, but knocked at 11*, the 8.5:1 might be fine with 12* BTDC, and knock at 13*. This is purely an example, not fact. You've got to tune it to find out.
May 16, 2013, 05:55 PM
#34
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That's the way mitsubishi did it, what can I say 
. If it were incorrect, I'm sure Tephra, or any of the other folks out there who made this reflash tuning possible, would have noticed.
Factory ecu code is usually very different than standalone mapping, so it's an apples-to-hamburgers kind of comparison.
. If it were incorrect, I'm sure Tephra, or any of the other folks out there who made this reflash tuning possible, would have noticed.Factory ecu code is usually very different than standalone mapping, so it's an apples-to-hamburgers kind of comparison.
May 16, 2013, 10:24 PM
#35
Evolved Member
That's the way mitsubishi did it, what can I say . If it were incorrect, I'm sure Tephra, or any of the other folks out there who made this reflash tuning possible, would have noticed.
Factory ecu code is usually very different than standalone mapping, so it's an apples-to-hamburgers kind of comparison.
. If it were incorrect, I'm sure Tephra, or any of the other folks out there who made this reflash tuning possible, would have noticed.Factory ecu code is usually very different than standalone mapping, so it's an apples-to-hamburgers kind of comparison.
off topic.
I am getting my 1.3u flash cable today from a friend. What things i need to check in order to see if the cable is working properly or not ?
Last edited by mines5; May 16, 2013 at 10:26 PM.
May 17, 2013, 02:54 AM
#36
Evolved Member
You need to log Baro compensated load to know what load the spark routine is accessing.
Then take note of what the air temp is doing to get the final trimmed result.
Then take note of what the air temp is doing to get the final trimmed result.
May 18, 2013, 06:21 PM
#37
Evolved Member
106.618
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Baro
98.5
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May 18, 2013, 07:10 PM
#38
Air temp
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Baro
98.5
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Baro
98.5
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May 22, 2013, 10:04 AM
#41
Evolved Member
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