Transient Ignition Retard Tables from RomRaider
 

I know a lot of folks have been wondering just what was done for the 01C rom. It's not subtle!

Here are the transient ignition retard tables from ZA1JA00C and ZA1JA01C (USDM) factory ROMs as read by Ecuflash and RomRaider betas. This table contains the only difference between the roms (which share a nearly common definition) according to RR.

Many thanks and mad respect to the RR and Ecuflash crew!! (I am merely a happy end user).

Edit: updated definitions, but still alpha. Thanks Td-d!!


http://i1143.photobucket.com/albums/...H/tables-2.jpg

How does the timing on the newer rom differe in layman's terms?

Also, if Subaru/Toyota isn't willing to flash early adopters to the latest rom, can you just buy an ECU and have the latest rom included?

The newer tune pulls timing during hard redline shifts where the old tune doesn't. Cars tuned to the edge of knock can experience "shift knock" due to transients that the air/fuel/spark delivery system can't keep up with. The transient retard system provides a way to compensate this and keep the engine knock safe. It's a very good capability to have.

That said, looking at these tables, I question the "hole" that remains between 3800 and 5600 rpm.

As far as flashing a rom with a new table: no problemo, and this is what I would do if I had an 00C car (no ECU replacement necessary, it's simply software). As far as flashing a rom with a different definition, well, you go a little slower here. Some WRXs (for instance) go through a few different roms with different definitions on identical hardware, and in these cases I've flashed a different generation rom over another -- usually because I didn't have a complete definition of the rom that was on the car. Scared me to death the first time I did this, but no issue. As long as the ECU hardware or anything attached to it hasn't changed functionally, it can probably be done (check twice, flash once, and for heaven's sake get a better opinion on it than mine).

I have no earthly idea why Toyobaru has any reluctance to flash 00C cars. This is dirt simple and fast to do with RR and ecuflash, it ought to be just as fast for a dealer.

Yeah no kidding. Something isn't right there.

All I see is, aside from the lower left square. They subtracted 20 across the boards.

I've just been looking at these same tables in tunerpro. 00C matches, 01C varies from the RR table (there are a bunch of 90 degree offsets).

Looks like there will be some revisions to the definitions.

Have you driven a car with the 01C calibration + RR? For me it feels like a lot of ignition retard on throttle tip in, makes the car bog sometimes on quick throttle input

Basically, it sparks later during rapid throttle position changes to ENSURE that there is no knock. The cost is that it also feels like the throttle is "laggier", and gives the feel of older drive-by-wire systems.

This helps prevent DI seal failure; the older tune is the cause we lost multiple STOCK engines.

@Ralph Spoilsport

If this stuff interests you, then have a search for @mad_sb 's discussions on the topic. Tables have been previously shared and explained.

My car has 01C from the factory (05/13 USDM) and I haven't modified anything. Throttle response is okay, for a stocker, it does not bog. I made a lot of mods to the DBW tables in my WRXs (which were horrible off the lot!) for driveability and I expect I'll do likewise for the BRZ once I figure things out to my satisfaction.

[...] Stuff deleted pending RR definition update

I had the 00C calibration on my car from the factory, ran a 00C ecutek calibration from visconti, and most recently an 01C ecutek calibration from fa20club.... the tip in throttle stumble is only there on the 01C calibration for me, throttle response on the 00C calibrations was always far better at least for me

Just to update those who may not be following the RR thread closely:

Link is up: https://raw.github.com/TD-D/SubaruDe...R_ZA1JA01C.xml

I've added Transient Ignition Retard ECT, RPM, Load, and TPS Threshhold tables - above (RPM and Load) or below (ECT, TPS) these threshholds, the retard table does not kick in.

@DJCarbine -- I think the fact that there is only this one definition change between 00C and 01C is going to trip people up. I'm looking right now at an 01C stage one tune done by one of the pros, which when opened in RR using our 01C definition shows a TIR table that has 20 degrees too much retard everywhere.

http://i1143.photobucket.com/albums/.../bad_table.jpg
http://www.ft86club.com/forums/data:...AASUVORK5CYII=