ECU does add timing...discuss
Jan 14, 2008, 04:31 PM
#1
ECU does add timing...discuss
http://spreadsheets.google.com/ccc?k...tQxCRcag&hl=en
If you look in this log and compare the load values (actually it is recorded load+temp+baro for total corrected load) to the ignition map none of the timing values seem to match. My theory is that the MIVEC advance also alters total timing. The other idea is that maybe there is an ignition advance table based off a lack of knock akin to the Subaru. Thoughts and discussion to this subject only please (or related subjects if pertinent).
I noticed this yesterday when I was on a quick tune up/log compare and actually logged to file today to make sure I wasnt totally insane and had been seeing things.
JB
If you look in this log and compare the load values (actually it is recorded load+temp+baro for total corrected load) to the ignition map none of the timing values seem to match. My theory is that the MIVEC advance also alters total timing. The other idea is that maybe there is an ignition advance table based off a lack of knock akin to the Subaru. Thoughts and discussion to this subject only please (or related subjects if pertinent).
I noticed this yesterday when I was on a quick tune up/log compare and actually logged to file today to make sure I wasnt totally insane and had been seeing things.
JB
Last edited by JohnBradley; Jan 14, 2008 at 05:05 PM.
Jan 14, 2008, 05:01 PM
#2
First off the link you posted only goes to a login screen. Just a head's up for ya'. As for advancing timing, I don't think it's limited to the 9's either...I've logged advancing timing that according to my timing tables is just not there on my 8. I've seen upwards of 26* advance on a log that according to the corresponding cell is only supposed to have 14* or so max, and then once knock is triggered it seems to back itself off to the programmed number and try advancing again. I thought I was seeing things at first, and I'm not sure if it has anything to do with open-loop at all (I first noticed it during open loop part throttle tests to try and cure a pesky 3k rpm knock problem). It would be good to find out, as it would lend a bit of insight for tuning purposes.
Jan 14, 2008, 05:15 PM
#5
The main thrust of this thread is that the table obviously exists in more than one app. I always thought that the Subarus had it easy since realistically only needs fuel changes and the timing takes care of itself (more or less).
I am wondering (hint hint) if this table couldnt be decomplied and implemented into a patch more akin to the Subaru? I am not a lazy tuner, but it would definitely make racegas maps and changes at the track signficantly faster.
I am wondering (hint hint) if this table couldnt be decomplied and implemented into a patch more akin to the Subaru? I am not a lazy tuner, but it would definitely make racegas maps and changes at the track signficantly faster.
Jan 14, 2008, 05:18 PM
#7
I can get it, but I have a Gmail account. You can post a spreadsheet up here without zipping it by just changing the extension, and telling everyone to change it back when they download it. Granted that kind of circumvents the reason they limit it to certain extensions, but it works.
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Jan 14, 2008, 05:20 PM
#8
Apparently a Gmail or Googledoc account is needed but since its free I suggest getting it. Its where I put all my logs that are worth seeing.
Edit- As you can see I dont have that particular cruise area set all the same between the 3 high octane maps so the timing differs from 2-5*
Edit- As you can see I dont have that particular cruise area set all the same between the 3 high octane maps so the timing differs from 2-5*
Jan 14, 2008, 05:29 PM
#10
There are high det and low det ign advance maps. The high det map has 0* for all loads and RPM areas. The low det has some ign advancement in the low load areas. Mostly transition from idle to cruise loads.
They just aren't defined in Ecuflash but another app.
They just aren't defined in Ecuflash but another app.
Jan 14, 2008, 05:36 PM
#13
First off the link you posted only goes to a login screen. Just a head's up for ya'. As for advancing timing, I don't think it's limited to the 9's either...I've logged advancing timing that according to my timing tables is just not there on my 8. I've seen upwards of 26* advance on a log that according to the corresponding cell is only supposed to have 14* or so max, and then once knock is triggered it seems to back itself off to the programmed number and try advancing again. I thought I was seeing things at first, and I'm not sure if it has anything to do with open-loop at all (I first noticed it during open loop part throttle tests to try and cure a pesky 3k rpm knock problem). It would be good to find out, as it would lend a bit of insight for tuning purposes.
What the OP is talking about is at WOT and liked to MIVEC in the 9.
Jan 14, 2008, 05:41 PM
#15
However as we have covered it still doesnt change the cruise portions (as set by the factory map). The rest of my maps are all the same (slap my wrist later) as I had been chasing the phantom knock from my clutch. Thank you for your input everyone. Bryan, do think that if we altered the cruise map portions in non cruise areas it would give us a similar effect to what the Subarus have? OR am I dreaming...