mike96
15+ Year Contributor
- 1,010
- 19
- May 6, 2008
-
Phoenix,
Arizona
Question for those of us running a 9653 rom or I guess any other rom for that matter I suppose. Now that I have my talon up and running, I have started going back through my rom again and was trying to get my AFR's in check. So I opened up my rom and went into the Periphery bits to set up a rom to stay in open loop (just so I can check my injector scaling) and I noticed in the most recent XML I downloaded FAA bit 10 is labeled "Timing knockdown on light acceleration and less than 3000rpm". This bit apparently is disabled from the factory (or at least on my rom it was) and I am wondering if anyone has any idea what effects this will have on the tune, how much timing it pulls assuming it is pulling timing and not adding to? I will ask on EvoM as well to see what they say...
Edit...
Never mind, I found my answer by doing some digging around on EvoM... Guess you tend to forget what things do when you don't mess around with them for over a year. But just in case someone else wants to know and hasn't done the digging themselves yet, it causes the ECU to pull anywhere form 3 - 8* of timing under light acceleration below 3K rpm. Apparently in some other roms it is active and evo owners are turning this bit off so that they can get their timing to actually match what they want their timing map to be. It is still unclear on EvoM if it is related to the lean spool function on the ROM or not, from what I have read they have been able to figure out what it does and have stopped researching it there...
Edit...
Never mind, I found my answer by doing some digging around on EvoM... Guess you tend to forget what things do when you don't mess around with them for over a year. But just in case someone else wants to know and hasn't done the digging themselves yet, it causes the ECU to pull anywhere form 3 - 8* of timing under light acceleration below 3K rpm. Apparently in some other roms it is active and evo owners are turning this bit off so that they can get their timing to actually match what they want their timing map to be. It is still unclear on EvoM if it is related to the lean spool function on the ROM or not, from what I have read they have been able to figure out what it does and have stopped researching it there...
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