RomRaider

So my 2012 STI has a new ROM that isn't supported yet - I had to submit the stock ROM to Romraider DEV for defs. My main motivation to tune the car is to delete the CL/OL delay that to my knowledge is the cause of running lean under boost and subsequent engine issues with newer STIs.

I was going to get an AP so I called the tech support for Cobb and they were not immediately aware that a new ROM was out for 2012 STIs - but did confirm that they are flashing brand new STIs with no issues. So to me this means that even if I bought an AP - it's just flashing a tuned version of an older ROM. So the question is - is there any reason I shouldn't do the same thing with Romraider? I have the defs and stock ROM for earlier build 2012 STI - just want to get a sanity check on my assumption before I try it....

Thanks in advance

They are zero from factory The fuel map is why they run lean along with the shocking AVCS and timing tables tables causing other issues etc

New maps are EXTREMELY different from the older maps.

Interestingly, it seems like the CLtoOL delay is actually set to 2EE (750 decimal) in this Rom. Busy pulling it apart.

Rom address for CLtoOLdelay is CBF9A, by the way.

Must be a US thing then, a fair few of the ones I have been doing lately are zero

Must be EPA regulations - the EDM ones are all zeroed out...

I'm nearly done with the full map - will post in the next day or so. Just have the DTCs to populate, and it's done.

Ecuflash definition uploaded - see viewtopic.php?f=34&t=8229

Thanks for the quick turnaround on the defs - much appreciated!

FWIW-
I just helped a guy review logs and fix his OTS stg2 map for his 2011 WRX - the tuner left in the 750ms delay and the thing was an absolute blowtorch under boost in certain driving conditions - from a medium cruise to WOT stab it would be as high as 18AFR while building significant boost - usually leaner than OL fueling for ~800ms or so (which went away as soon as we zero'd CL/OL delay). Based on the testing we did it wouldn't really show up in a dyno style run (low rpm-high gear-slower boost onset) as clearly as in our test which is much more representative of what really happens when you go WOT on the street. I'll guess this tuner doesn't road tune and the users of the map don't know any better....But the delay is defintely in the 2012 early and current USDM STI ROM, and was also in the USDM WRX ROM in 2011.

No problem - glad to help. It definitely looks like the CL/OL delay has been reintroduced in the newer USDM roms - busy looking at the 2012 WRX rom, same thing.

Just zero'd the CL/OL delay and set the 1st gear boost comp from -6% to 0% - much happier with what I'm seeing. Looks like I'm missing some knock parameters in RR logger so will leave it alone until I can monitor properly. Thanks again!

Now time to get busy with a 32bit SD map for the rallycar - it's a few weeks from being back on the road so time to get serious and start asking questions....

I'll upload the parameters shortly, glad it's working for you.

In regards to USDM roms, all the 08 + WRX and STi roms I've seen use a delay of 750 or so.

I ran 0 delay for a long time and that helped a lot but my fuel economy suffered quite a bit. Sometimes you don't want it going into open loop such as cruising up a hill or passing under medium to light loads.

The delay value is only part of the equation. You'll find that some tuners just zero it out while some make it smaller. If making it smaller, it is important to also tune the tables that control the logic for the transition. I spent a lot of time logging and understanding these tables so that I could tune them for better fuel economy. I've changed all the adjustment tables so that the transition can happen quickly when it should in addition to making the delay smaller.

One cool thing I've never seen anyone use is the separate delay value for I mode. I already use I mode as a gas saver by tuning it so that it doesn't have much pedal response. I set my delay value for I to 300 while I have 50 for S and S#. I use I mode for cruising on the highway and it stays in CL a lot better and helps a lot with gas mileage.

If you aren't really worried about it or don't want to mess with it then a zero delay is the way to go. If you decided to care about fuel economy then look into the transition logic. I didn't care much when running gas but now that I'm on E85 I like to stretch out my already short time between fill-ups.

I use a value of 1000 for Intel mode and let the rest of the tables clear the delay if/when required

I have my Intel mode scaled so it could be mistaken for a V6 toyota, only runs wastegate boost pressure(less than 10psi) and and it needs more than 50% accelerator pedal to even get out of closed loop in most cases!