Thanks John, that is what I was looking for. Seems 1284 and 1285 are linked, if you change one th other changes as well.

When put my settings to 2500/2500 my AFR's dropped just about 1 point of more. I am remapping the fuel map now, but seems awkward putting that much fuel back into the fuel map. This is what is suspected correct?

 

i am only finding 1280 and 1282 where is 85 and the other? sounds like you are saying that they are basically the same values?

thanks guys...

been wondering this lately, as ive been playing with my 05 rom (2.3 car)... and almost all of the cars we have done lately were 06+


would raising the values both (80 and 82) to say 9000 rpm effectively also disable the feature?

cb

 

"Before the lean spool enable (3500 or 2500 RPM) the AFR has a fixed lean value during spool."

Therefore you're better having the word at 1280 (1281 if you work in a byte) and 1284 (1285 if you work in a byte) values low rather than high to disable the feature, otherwise you run a fixed lean map all the way.

However, mine is still enabled from 2000-7500 RPM and I just tune around it. Just what I've got used to.

 

Are you guys talking about the Boost enhancement (Anti-lag) Start Rpm and Boost enhancement (Anti-lag) Stop Rpm? I look at the numbers in these two little tables and I find 2500 rpm for the former and 4531 rpm. Are these the numbers that need to be changed or is something else? Is it in the xml file with the ecu id that I have (96940011)?

 

Guys:

We researched this earlier, but while it affects the antilag stop rpm as well this is separate. 1280/1282 is the antilag switch point in the 05/06, but as JCS pointed out we are altering a different trailing address. 3GTurbo figured out that there are actually 3 lean spool maps (hi, mid, lo) but disabling the 1281(1681 in older VIII's) takes care of all 3. The way I have it configured is it put me closer to a real AFR and seemed to be more consistent between the gears. I dont think the IX (that I have seen anyway) has the same 1-3 AFR and then 4th being different issue but my AFR's are very stable.

 

https://www.evolutionm.net/forums/sh...d.php?t=217264

This show the Target AFR (afrmap) flatlining during spool-up. The blue line also shows that after a shift the Target AFR is quite a bit richer.

 

Ok, this may be a coincidence, but I put the enable and disable at 2500. I have changed the fuel maps and made sure the low map was about .5 lower in the high load cells. When testing I noticed the octane remained at 100 and knock was zero or 1. Yet, it seemed the fuel map was running off the low map. I matched the high and low maps and everything was right again.

WHen testing this AM I noticed that I was running 13* timing at 6000 rpm around 220 load. In my high timing map it is 15, but the low map is 13.

Any thoughts that disabling the lean spool automatically puts you in the low fuel map and timing? I need to test more, but just checking with others that have done the disable.

 

Yes that is odd, I have never had that happen. You sure you didn't confuse the two maps? hehe

 

Razor, don't think I confused them. But I am blonde!! The only reason I noticed was that I actually started to detune the Low octane maps and noticed the values in the high octane cells where not what I was hitting. I am going to test again with a back to back tune. One with both maps the same and one with the low octane maps detuned. Let you know what I find. Could be something else I have done to mess this up too!!

 

I am consistently getting a bump in my IDC and load values at ~4500 rpm, and after reading this thread, I'm thinking that it has something to do with the boost-enhancement anti-lag setting and/or these other lean spool settings. I can't quite figure out what's-what in this thread though. Does anyone know the hex addresses and byte length of these settings for an USDM Evo 9 ROM (88590015)? Would anyone be willing to try to summarize what you all have been talking about?

 

NM. I got the address info from the 3rd gear thread. Still trying to get a handle on what everyone was discussing on the effect of these settings. May have to do some testing to see what changing the "anti-lag" stop setting does to the bump I see in IDC.

 

My understanding is not complete on this topic and I'm still confused because these lean spool and antilag maps often refer to the same thing.

Talking 2 byte RPM values here... before 0x1280 (or 0x1680 on some ROMS) the AFR value at 0x1282 is used. Between the 0x1280 and 0x1284 RPM values the AFR is about 1 AFR leaner as per a conversion table. There are also timers and load thresholds for operation of lean spool, and also there is an "antilag" table that has RPM and a lookup value that 3gturbo posted. There are also funny antilag tables that are related to advance. I've not yet tied all this together yet, at some point I hope to once I've got the realtime/RAM maps running, and I'm also spending time in the disassembly looking at multibyte OBD II type stuff to see what developments can be made. I also want to put more time into speed density stuff, but I need to work on one bit of the puzzle at once.

 

I didn't notice an mention of the 03 ecu. I'm in the process of richening up my spoolup on my 03. Seems odd doesn't it to counter the factories plans.

 

Its there, 1681/1685 for the 1 byte.

 

I may be having the same problem with my 05. I can't seem to get the car to richen up after 5,000RPM or soo. I have the values maxed at 7.4 for the entire top end with little effect. knock is 0-1 yet The AFR's are still 11.9-12. I see no reason for the car to be running off the low oct. map.

I'm going to check the igntion timing and see which map the car is really running in.

to you guys who say you simple "tune around" the lean spool, could you please elaborate? Do you tune a combination of 100 & low octane maps? My personal car seems to follow the 100oct. map to about 4500rpm (even with no knock and datalogging octane flag in the 99.6-100) and then ignores my values, leaning the car out from 10.8@3500-4000rpm to 12.@5000 up