Temp related knock

[steve99]

Originally Posted by Td-d

Most of the roms I've seen pull 2.11 degrees in the top cell.

Checked a WRX table at 212F pills 2.11 at 230F pulls 3.52. Thought they would have pulled more than that ,maybe -5 or so above 230f but their is probably a good reason they don't

strange we have no compensation in A or B ECT table think I will add some to next map after some more research

[Kodename47]

Does the ECU not pull timing based on oil temp?

[steve99]

Originally Posted by Kodename47

Does the ECU not pull timing based on oil temp?

I did not see a table fot oil temp vs timing retard. The Coolant vs timing retard is defined just all zero for whole temp range.

It possible oil temp vs timing retard not defined or does not exist
ECU may have hard coded coolant or oil temp limit at which it takes some action ie limp home mode and throws a cel code.

just strange other subaru ecu pull timing at high coolant temps and this one doesnt, might be like the transient ignition retard setting that was set to 10000 rpm in early rom

[akyp]

@steve99 I tried your IAT compensation for the first table, but left the second table alone: http://www.datazap.me/u/akyp/2014091...om=11500-12329

I have some work to do. The FLKC seems particularly bad at 5000rpm 1.0g load, but they are almost everywhere else. I think I'll try to change most of the cells in the second table from -50% to -100%, though I wonder how much of this is due to high IAT.

[steve99]

Originally Posted by akyp

@steve99 I tried your IAT compensation for the first table, but left the second table alone: http://www.datazap.me/u/akyp/2014091...om=11500-12329

I have some work to do. The FLKC seems particularly bad at 5000rpm 1.0g load, but they are almost everywhere else. I think I'll try to change most of the cells in the second table from -50% to -100%, though I wonder how much of this is due to high IAT.

I had terrible trouble with knock on our 98 ron fuel especially in high ambient temps once I switched to a 100 ron fuel with 10% ethanol it was heaps better, which you would expect, but maybe the cooler burning ethanol helps as well.

[Kodename47]

Originally Posted by steve99

I did not see a table fot oil temp vs timing retard. The Coolant vs timing retard is defined just all zero for whole temp range.

It possible oil temp vs timing retard not defined or does not exist
ECU may have hard coded coolant or oil temp limit at which it takes some action ie limp home mode and throws a cel code.

just strange other subaru ecu pull timing at high coolant temps and this one doesnt, might be like the transient ignition retard setting that was set to 10000 rpm in early rom

IIRC at 105 or 110C oil temps then timing is reduced. It may be that the cooling system on this car is well engineered that coolant temps aren't an issue, at least on a stock car. I'd rather oil temp based retard as its also likely to help reduce oil temps themselves.

[jflogerzi]

This car is a different car in 100F temps plus the AC running. There is something going on in the ECU.

[solidONE]

Originally Posted by steve99

I did not see a table fot oil temp vs timing retard. The Coolant vs timing retard is defined just all zero for whole temp range.

It possible oil temp vs timing retard not defined or does not exist
ECU may have hard coded coolant or oil temp limit at which it takes some action ie limp home mode and throws a cel code.

just strange other subaru ecu pull timing at high coolant temps and this one doesnt, might be like the transient ignition retard setting that was set to 10000 rpm in early rom

Where is this coolant/ignition timing table?

Originally Posted by Kodename47

IIRC at 105 or 110C oil temps then timing is reduced. It may be that the cooling system on this car is well engineered that coolant temps aren't an issue, at least on a stock car. I'd rather oil temp based retard as its also likely to help reduce oil temps themselves.

here is this oil temp/ignition timing table?

[steve99]

Originally Posted by solidONE

Where is this coolant/ignition timing table?



here is this oil temp/ignition timing table?

I cannot see an oil temp table, but the coolant table is just below the IAT temp compensation tables in RR its labeled ECT engine coolant temp.

if you fing thevcoil one let me know.

[solidONE]

Originally Posted by jflogerzi

This car is a different car in 100F temps plus the AC running. There is something going on in the ECU.

Ahh corona... located right up in the devil's buttcrack. Log it and find out what's going on man.

[jflogerzi]

Originally Posted by solidONE

Ahh corona... located right up in the devil's buttcrack. Log it and find out what's going on man.

Yup. Its gonna be 104 today! I just flash to the new 2.06 OFT Stg 2 for UEL 91. Gonna take some logs later when it cools down a bit

[JB86'd]

So I am now going on my 5th revision of this 2.01 tune after doing datalogging and still finding FLKC in the range of -.6 to some rare occurrences of -1 to -1.3 FLKC, along with very rare Knock Correction. IAM is still dropping to .8 at the lowest and rises back up and back down depending how I drive.

Knock is there at IAT under 86 degrees, but my knock is definitely worse in higher temps so I set IAT to pull a bit of timing in higher temps.

Here is my Revision 4 tune, COMPARED to the original B01C.



Here is a datalog I did on the Revision 4 tune in 95 degree ambient temp.

http://datazap.me/u/joshbustos86/frs...ta=1-4-9-11-12

Here is my latest Revision 5, COMPARED to Revision 4.




Before I flash Revision 5 my question is, am I being too proactive/aggressive in pulling timing, and if not, do my changes look smooth and correct?
Am I giving up a lot of power here by pulling timing unnecessarily or is it better to eliminate all knock and stay at a constant IAM of 1?

any input is greatly appreciated. @steve99 @Shiv@Openflash

[solidONE]

@JB86'd Your data log look really really strange with the engine RPMs and pretty much everything else jumping all over the place... Not sure what you can do with this data. Are you running a spliter after the OBD port?

[JB86'd]

Originally Posted by solidONE

@JB86'd Your data log look really really strange with the engine RPMs and pretty much everything else jumping all over the place... Not sure what you can do with this data. Are you running a spliter after the OBD port?

Nope. I was just doing some normal driving along with some spirited runs to high rpms. Maybe my log is just too long.