lepich Posted April 10, 2009 Share Posted April 10, 2009 Doing maf scalling, set OL area to 11.4 AFR, running WGDC = 0. Please look at the log. LC-1 shows one data, stock shows another. Should I use Lc-1 for a scalling, as stock sensor will not be good anyway, after MAF will be fixed?romraiderlog_20090410_093820.csv There are no bad people, just differeent. Link to comment Share on other sites More sharing options...
mickeyd2005 Posted April 10, 2009 Share Posted April 10, 2009 Only use AFR #1 for closed loop and diagnosis purposes. At WOT, always use WBO2. Link to comment Share on other sites More sharing options...
mickeyd2005 Posted April 10, 2009 Share Posted April 10, 2009 For scaling purposes, you should set AFR to something richer since your MAF scaling is off. Your MAF scaling looks dangerous. Link to comment Share on other sites More sharing options...
lepich Posted April 10, 2009 Author Share Posted April 10, 2009 ^This is waht I was thinking, thank you for the confirmation! Was surprised that stock was reading AFR, it was not on its bottom (11.2 for me) There are no bad people, just differeent. Link to comment Share on other sites More sharing options...
lepich Posted April 10, 2009 Author Share Posted April 10, 2009 For scaling purposes, you should set AFR to something richer since your MAF scaling is off. Your MAF scaling looks dangerous. yes, it way off. i use drop-in KN filer, strange why it is so off from off-shell MAF scaling for a drop-in. There are no bad people, just differeent. Link to comment Share on other sites More sharing options...
Spec B Posted April 10, 2009 Share Posted April 10, 2009 You are running way too lean...but you have enough info to scale the upper portion of your MAF scale. Use Airboys sheet..you basically determine what the % error is between your target ARF (11.4 in your case) at each data point and maf V. Assuming there are no leaks, right now you are pulling in more g/s than your scale is seeing. You need to bump up the maf scale amounts accordingly. Just watch your WB02 afrs...like MickeyD said, that is dangerously lean. Link to comment Share on other sites More sharing options...
lepich Posted April 10, 2009 Author Share Posted April 10, 2009 I am usning airboy's excel plus this: http://forums.nasioc.com/forums/showthread.php?t=1714223&highlight=MAF+scaling Very helpfull tool. Thank you! There are no bad people, just differeent. Link to comment Share on other sites More sharing options...
Spec B Posted April 10, 2009 Share Posted April 10, 2009 Man...now I hear about this..I was doing all the calcs by hand. Great tool! Link to comment Share on other sites More sharing options...
mickeyd2005 Posted April 10, 2009 Share Posted April 10, 2009 yes, it way off. i use drop-in KN filer, strange why it is so off from off-shell MAF scaling for a drop-in. Not unusual at all. I think enthusiast saw the same thing with just a purolator filter. Swapped back to OEM and everything was fine. Link to comment Share on other sites More sharing options...
lepich Posted April 10, 2009 Author Share Posted April 10, 2009 Yeah.. and I've cleaned it yesterday, which sets MAF scalling off even more. Always glad to learn more:-) There are no bad people, just differeent. Link to comment Share on other sites More sharing options...
qikslvr Posted April 10, 2009 Share Posted April 10, 2009 Heres another handy spreadsheet tool from cobb. It has injectors scaler, intake calibration and some other stuff. Got to the intake calibration tab and there is a formula right under the Cobb logo that is pretty handy. Simply put in the requested and the actual AFRs and it tells you the multiplier to apply to correct the difference. http://www.cobbforums.com/forums/images/AccessTUNERCalibrationTuningGuideWorksheetforSubarusv131.xls There are some other semi-relevent Cobb tuning documents here(worded for StreetTuner not RR tuning): http://forums.cobbtuning.com/forums/showthread.php?t=31091 Let's kick this pig! Link to comment Share on other sites More sharing options...
lepich Posted April 14, 2009 Author Share Posted April 14, 2009 Ok, here is an update with a question, as usual :-) After I've scalled MAF for OL, car runs great. with Meth, I am targeting 13.5-14.5 AFR in some areas, getting 12-12.5 on most WOT area. However, at 3600 - 3800 RPM, 3.2 load still getting 11.5 -11.9 AFR (14.47 targeting there) . If I would like to have 12-12.5 AFR there, is there is another way to make it lean, beside OL table? I do not have room for adjusting OL anymore, can't have more that 14.7. So, I am thinking to change MAF scalling, lower g/s numbers in that area (3.8-4.0v), so ECU will inject less fuel in order to hit AFR target. Does it sound right? Can't think of any other way to make it run leaner. There are no bad people, just differeent. Link to comment Share on other sites More sharing options...
Spec B Posted April 14, 2009 Share Posted April 14, 2009 Why don't you scale your Maf so whatever you target on your map you hit? Is it because you are running Meth? Link to comment Share on other sites More sharing options...
lepich Posted April 14, 2009 Author Share Posted April 14, 2009 Yes, I have scalled MAF without Meth, was hitting my OL AFRs. Now, tuning for Meth, need to raise target AFR, so real AFR will be in 12-12.5 range. But in some areas I cant rasie it anymore. So, if I change my MAF to a lower airflow values, ECU will think - less air, less fuel needs to be injected. As a result, my real AFR in that area will go leaner. Actually, I've tried this, and it works . 12 AFR with meth where I need it. Just not sure if this the best way to get AFR leaner. There are no bad people, just differeent. Link to comment Share on other sites More sharing options...
yamie700 Posted April 15, 2009 Share Posted April 15, 2009 I am trying to scale my K&N Typhoon right now. For closed loop I'm using RR tab for MAF. Just want to make sure I am scaling for open loop low range correctly. I set WGDC to 0, using the simplified primary open loop fueling, with most of the targets at 11.0. So I log at various speeds, 5th 50-70% throttle, and 3rd WOT. Lets say with my lc1 I see AFR of 11.2, target 11.0. So difference of 1.8%, I would then multiply the corresponding Mass Airflow g/s by 1.018 for that volts cell right??? How close, percentige wise, is good enough for scaling? Link to comment Share on other sites More sharing options...
lepich Posted April 15, 2009 Author Share Posted April 15, 2009 ^ Yes, for OL I did almost rthe same. except i did only WOT, from 2K to 7K RPMs. several runs, corrected using these excels I've posted above, adjust, runs againa,.. 4 times like this. Now need to do CL scalling, RR is not showing anything for me at that Scalling TABfor soem reson. will look into it closely There are no bad people, just differeent. Link to comment Share on other sites More sharing options...
yamie700 Posted April 15, 2009 Share Posted April 15, 2009 In the RR MAF tab make sure you adjust the max intake temp filter. I think it defaults at 35degrees. I usually just set it a little above air temp and go log. Link to comment Share on other sites More sharing options...
lepich Posted April 15, 2009 Author Share Posted April 15, 2009 Oh, Ok. Thank you! There are no bad people, just differeent. Link to comment Share on other sites More sharing options...
Legacy_GT_Pilot Posted April 16, 2009 Share Posted April 16, 2009 If you're injecting a lot of meth, you'll have to adjust you MAF values to compensate as you cannot target AFRs leaner than 14.7 to reach your target. A few others have done the same thing you're suggesting. I didn't have to as I'm running less meth than most (mainly because my Perrin system cannot handle anymore. Yes, I have scalled MAF without Meth, was hitting my OL AFRs. Now, tuning for Meth, need to raise target AFR, so real AFR will be in 12-12.5 range. But in some areas I cant rasie it anymore. So, if I change my MAF to a lower airflow values, ECU will think - less air, less fuel needs to be injected. As a result, my real AFR in that area will go leaner. Actually, I've tried this, and it works . 12 AFR with meth where I need it. Just not sure if this the best way to get AFR leaner. Link to comment Share on other sites More sharing options...
lepich Posted April 16, 2009 Author Share Posted April 16, 2009 ^^ Thanks for confirming. There are no bad people, just differeent. Link to comment Share on other sites More sharing options...
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