Gpepes2012
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« Reply #15 on: September 30, 2021, 11:31:00 AM »
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Thank you very much for the help. I appreciate it. What exactly does kftlws represent? I see in the axis that it has a percentage of throttle rpm and load.I know that all these are noob questions but I try to understand how it works from the logs
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Leonhard
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« Reply #16 on: September 30, 2021, 02:28:01 PM »
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you are asking the right questions  It's the load-calculation (precontrol) very simple explained: driver's demand (throttle position) of load (injection in first place) over rpm. Corrections are following, like warmup, afterstart, lambda-control, WOT enrichment ect. and yes...it should be corrected/lowered as well, after increasing injector size. Bigger injectors needs less opening time ti[ms] for same inj.quantity -> ti is part of this load unit |
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ZpiXDK
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« Reply #17 on: October 01, 2021, 01:11:06 AM »
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Anyone know the correct factor for M3.8.1 (VR6) MAF Linearization? Don’t look the same as M3.8.3 (AGU), and the damos say they use same factor, but that don’t really make sense tbh.
-Didn’t look at ir awhile, so can’t remember why it dosn’t look right (:
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You want some tuning with that pop and bang?
-Nahh it’s not good for the engine
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Gpepes2012
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« Reply #18 on: October 02, 2021, 07:36:39 AM »
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So kftlws needs adjustment or not since the injectors end at 16.32 ms? After proper injector calibration kflf needs adjustment?In general, the strategy from now on is based on the actual load? Can I increase the request load and the valve duty kfldtv by% to achieve the desired?Thanks in advance
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Leonhard
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« Reply #19 on: October 03, 2021, 01:47:57 AM »
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adjusting KHFM to bigger injectors will reduce load scale, means all load related maps/values needs to be shifted.
For example: 14psi are about 10ms load with original setup, changed KHFM in your case will lower this to around 7ms.
K04-20/23 won't need more than 12ms with new scale.
match fueling first at part load, measure boost and get (a feeling for) the new boost/load/airmass ratio (Data Block 002)
check/adjust base boost (N75 -> 0%), than build your new KFLDTV for desired boost target.
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Gpepes2012
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« Reply #20 on: October 03, 2021, 03:04:42 AM »
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Thank you Leonhard for helping me a lot to understand how it works. One last question about kflf.Assuming I make changes to% in kflf at idle and in normal driving according to block 099 lambda reg and everything is ok does this automatically mean that everything will be fine in wot?I ask why a wideband gauge is not available at the moment. Or do I definitely have to have a wideband?
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Leonhard
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« Reply #21 on: October 03, 2021, 04:30:09 AM »
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KFLF is actually not the map for basic fuel tune, it's for enrichen fuel at higher loads, outside lambda=1.
you see an factor and not lambda within KFLF. Factor 1.0 should stay for desired lambda=1, you can/should shift these factors according to new load scale. Check also TLRAN(load threshold lambda control) and TLWARN(load threshold fuel adaption) for shifting to new scale. Tweak KHFM to get close within lambda=1 area, KFLDSAK can help and TVUB might be a choice too.
And yes...Wideband is a must to verify at higher loads.
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Gpepes2012
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« Reply #22 on: October 04, 2021, 03:57:46 AM »
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Thanks again. I made a log to see if everything is ok. I have it all but I have not installed anything(vr6 maf,bam injectors) yet except the k04 turbo.Everything stock except turbo. Does the wastegate need some adjustment? Why do I have a higher actual than the request?
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Leonhard
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« Reply #23 on: October 04, 2021, 05:39:36 AM »
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KFLDTV (N75) precontrol starts with 62% at this point(map), too high for requested load with K04.
Boost (air mass) control isn't fast enough to hit Target. K04 just delivers more air mass.
If you like to match K04 with ori setup, reduce values in KFLDTV.
Try not to touch wastegate-actuator hardware, you might need this setting for later.
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BlackT
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« Reply #24 on: October 04, 2021, 09:32:29 AM »
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If that log is with K03 than I would say that is a mehanical problem
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Gpepes2012
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« Reply #25 on: October 04, 2021, 12:49:11 PM »
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k04-023
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Gpepes2012
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« Reply #26 on: October 05, 2021, 04:49:43 AM »
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Thank you very much Leonhard. I appreciate your help. I have to reduce the tlran so that I am in a close loop so that the ecu is in control? Can you tell me in simple words what exactly does kfvakl and kffa do?My car is decat.Need to zero kffa?Can i adjust kfvakl by log ms on deceleration?
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Leonhard
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« Reply #27 on: October 06, 2021, 05:02:46 AM »
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yes, TLRAN is the threshold for close loop lambda=1 control and should be corrected for bigger MAF and injectors too.
KFFA is for cat protection against overheating, it will be added to factor of KFLF.
For example 1,21+0,08=1,29 at 7ms-5500rpm, get's very rich for cooling exhaust gas. And yes, no need without cat.
You might think about measuring exhaust gas temperature, if I remember correctly, K04-023 has a hole for sensor.
You can adapt a common NiCr-Ni thermocouple to tweak full load lambda.
You need at least the voltage signal of ori NB lambda sensor for checking KFVAKL, being still too rich or lean enough.
Respect dead times of these values. WB-sensor would be more precise.
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Gpepes2012
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« Reply #28 on: October 06, 2021, 02:06:48 PM »
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I have never seen so many details and help anywhere. The best site with the best tuners ever.One last question. How can I tell if the injectors have reached the limit?Stock injectors max 16.32 ms and bam injectors 16.32 ms too.If I put 630cc later I will do the same procedure in the calibration?Khfm,TVUB,TEMIN,TLST.....?
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Leonhard
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« Reply #29 on: October 07, 2021, 01:21:13 AM »
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basically you can calculate:
injector opening time(te) - that being injection quantity - is limited by duration of 2 revs (4-stroke)
for example: 1000rpm -> 1 rev = 60ms -> 2 revs at 1000rpm are taking 120ms; 6000rpm -> 20ms; 8000rpm -> 15ms
If you reach these values for te, get bigger injectors.
And yes, but with 630cc Injectors you might be able to max out the range of VR6-MAF.
Good luck, looking forward to read from your project
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