utc_pyro Posted March 19, 2010 Share Posted March 19, 2010 I pulled the ROM from my car today, and starting looking around in RomRaider on how we can do this. Looks like it's not NEARLY as cut and dry as with accesstuner. We just have this compensation table to mess with, and there are some "hidden" tables as well. CL Fueling Target Compensation (Load) - This is the compensation to the closed loop base fueling target based on load and engine speed. Other compensations (some undefined), are also applied. Note: Lean compensation in this table will potentially force open loop during normally closed loop fueling conditions.This is going to be fun figuring out.... Link to comment Share on other sites More sharing options...
Boostin1657615274 Posted March 19, 2010 Author Share Posted March 19, 2010 somebody on the opensource side is going to have to disassemble the ROM further, what else can I say. It's still the same ECU. I can't find anything in my ECUflash definitions that are equivalent to the AccessTuner table I have been manipulating. On the search for a new DD... Link to comment Share on other sites More sharing options...
Yamarocket630 Posted March 19, 2010 Share Posted March 19, 2010 I pulled the ROM from my car today, and starting looking around in RomRaider on how we can do this. Looks like it's not NEARLY as cut and dry as with accesstuner. We just have this compensation table to mess with, and there are some "hidden" tables as well. This is going to be fun figuring out.... Actually, the Closed loop fueling target (load) table is the same as the Access tuner table, just it is a modification of the primary open loop table rather than another AF table. For example at 0.6 load and 3200 RPM the O/L fuel table is 14.7AF and the closed loop table is -0.132. Add -0.132 to 14.7 and you get 14.568 AF which rounds to 14.57, exactly what is shown in the access tuner table (stock) for that load and RPM. So if you want your closed loop target to be 16.2 AF at 0.6 load and 3200 RPM, change your closed loop target in that cell to +1.50. A little more tedious but the same result. Link to comment Share on other sites More sharing options...
utc_pyro Posted March 20, 2010 Share Posted March 20, 2010 Heh, lack of sleep can do funny things to you, like making me stupid after 11PM. It even says "Additive" at the botton of the table. Based on MechaGod's post over a romraider regarding this, the highest AFR possible is 15:5:1 though. Kind of low to do a true "lean burn" tune. Link to comment Share on other sites More sharing options...
bugblatterbeast Posted March 20, 2010 Share Posted March 20, 2010 16.5 is already plenty lean, possibly past the point of peak fuel economy. why would you want to run any leaner? it is not like we have stratified charge combustion chambers or direct injection which can take advantage of super lean mixtures. has anyone done experiments to find out when the ecu goes open loop on the lean side? I've pushed to 15.5 in CL but haven't had time to go any leaner. Link to comment Share on other sites More sharing options...
utc_pyro Posted March 20, 2010 Share Posted March 20, 2010 Opps, sorry, that was a typo.... 15.4 is the max that was stated (here) that it could be changed to. One needs to get a hair leaner (.3 points or so) to get the max fuel economy, and really the ability to go past that at 16 would offer more room for testing/tuning. Here's an article I found useful on it: http://www.hondatuningmagazine.com/tech/0510ht_fuel_economy_tuning/index.html Link to comment Share on other sites More sharing options...
ClimberDHexMods Posted March 21, 2010 Share Posted March 21, 2010 Not promising words from most of those who have tried it on RR, but cleaner plugs alone would be worth it IMO. [CENTER][B][I] Front Limited Slip Racing Differentials for the 5EAT now available for $1895 shipped, please inquire for details! [/I][/B][/CENTER] Link to comment Share on other sites More sharing options...
bugblatterbeast Posted March 21, 2010 Share Posted March 21, 2010 Opps, sorry, that was a typo.... 15.4 is the max that was stated (here) that it could be changed to. One needs to get a hair leaner (.3 points or so) to get the max fuel economy, and really the ability to go past that at 16 would offer more room for testing/tuning. Here's an article I found useful on it: http://www.hondatuningmagazine.com/tech/0510ht_fuel_economy_tuning/index.html if you want to go leaner, just skew the front O2 sensor calibration. just keep in mind that you need to push the timing forward to see the mileage gains. Link to comment Share on other sites More sharing options...
_MFB_ Posted June 27, 2010 Share Posted June 27, 2010 Mine's fxt 09 edm, leaned cl comp table by .84 to test. Your af learning B will lean out and as computer learns, there will be some fbkc. I richened up those cells that were affected as I want AF B at -2. Target afr is made leaner, got some fuel savings in. :-) Link to comment Share on other sites More sharing options...
bugblatterbeast Posted June 28, 2010 Share Posted June 28, 2010 you guys must have different limits for you close loop afr compensation table. if I enter anything much greater than 0.75, the ecu gets pissed off and goes to some fail safe OL mode. have you logged your cl/ol status? Link to comment Share on other sites More sharing options...
Boostin1657615274 Posted June 29, 2010 Author Share Posted June 29, 2010 Haven't messed with this much since the thread began. I have nothing new to report. Had to replace plugs and the FPR failed. Besides those two things the car is still driving fine. On the search for a new DD... Link to comment Share on other sites More sharing options...
farmerz24 Posted September 27, 2012 Share Posted September 27, 2012 how much timing are you running up at cruise? 45+ degrees? Link to comment Share on other sites More sharing options...
Skidude Posted September 28, 2012 Share Posted September 28, 2012 Did anybody ever figure out how to lean out the cruise sections with RR? Link to comment Share on other sites More sharing options...
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