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Author Topic: Stingy OP discovers hardware failure with GTX2860R  (Read 17387 times)
_nameless
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« Reply #15 on: March 09, 2021, 08:10:15 AM »

I dont have the time to go threw your file and and point out the addresses you have. I dont have a map pack for that version so im finding them by hand. the file you uploaded in your last post looks the same as the original. Be Careful with what you are doing that setup can easily throw a rod threw the side of the block. hint: ldrxn caps irl. your changes dont make sense in regards to those maps. also your boost cap is still enabled at best youll make 14 psi. fueling is too lean then bts will kick in and drown it in fuel. you have a very long way to go and youre headed in the wrong direction. start with the basics like fueling, an appropriate maf housing size to accommodate the air flow, calibrate the new maf sensor housing, scale your tables to give you resolution so youre not running the last row (140 load) anything over that will run those timing values. Just my 2c. also, fwiw you have to play ball if you want help ie me7 logger logs, do some self education on the topic, do some reading on pid control systems so you have a understand on how boost control works in closed loop etc       
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« Reply #16 on: March 09, 2021, 08:12:35 AM »

also, for what reason do you think you need to change air over throttle maps? you think you can do a better job then the bosch calibrator who measured air flow tested it on a flow bench?
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« Reply #17 on: March 09, 2021, 09:52:24 AM »

Yes found them, KFVPDKSD/E. Marty, can you tell me what maps/functions are at the following addresses? Attached is where I had boost kind of where I wanted yesterday with your pressure ratios copied over, haven't had time to try the rest yet. 
13583-13587
19bc5-193cf
1f368,1f369
1fc46-1fe3b
8cda8-8cdb7
fffe0-fffe5
13583-13587
axis values for kfz
19bc5
kfldrapp: single boost duty cycle table used when in app mode (cwmdapp bit set to 8 in the file i uploaded you)
1f368,1f369
NDLDRAPU
1fc46-1fe3b
idk most likely checksum
8cda8-8cdb7
idk most likely checksum
fffe0-fffe5
idk most likely checksum
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kruftindustries
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« Reply #18 on: March 24, 2021, 08:58:34 PM »

I put the maf sensor in a larger housing, so that is mostly sorted for now..
I am still having issues with the boost pid. It's to the point where KFLDRL and DIMX almost look alien, it's kind of close but still overshooting.

RE:
Quote
for what reason do you think you need to change air over throttle maps? you think you can do a better job then the bosch calibrator who measured air flow tested it on a flow bench?
When I Read the wiki™ there was mention of changing the axis values of these maps under the bold Base boost and wastegate spring pressure heading. I thought that might help.

I have attached images this time for easier viewing
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nyet
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« Reply #19 on: March 24, 2021, 09:14:05 PM »

dude, your wgdc is ZERO

How did you miss that?
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ME7.1 tuning guide
ECUx Plot
ME7Sum checksum
Trim heatmap tool

Please do not ask me for tunes. I'm here to help people make their own.

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kruftindustries
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« Reply #20 on: March 24, 2021, 09:17:08 PM »

I thought higher wastegate duty cycle increases boost? It's already overshooting
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kruftindustries
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« Reply #21 on: March 24, 2021, 09:23:50 PM »

I can change the title to "plebeian n00b refuses to read wiki, has issues with boost duty PID" if you want  Roll Eyes

Or you can. Does anyone read posts anymore or are we here to unload full magazine of snarky car comments lol
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kruftindustries
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« Reply #22 on: March 24, 2021, 09:53:02 PM »

The above log was after I used Marty's edits.bin addresses to locate the KFLDRAPP table, do the whole 10% and log, %20 and log etc.. procedure to populate KFLDRL and KFLDIMX. CWMDAPP worked just fine and anything above 60% wgdc at higher RPM's got a throttle close, assuming >2550mbar. LDRXN is set to 180 flat.

Should I adjust the wastegate or should I be running much more boost in the first place?
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nyet
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« Reply #23 on: March 24, 2021, 09:57:01 PM »

You should start by consulting your compressor map, deciding on a PR, do some napkin estimates over your pressure drop over your IC, and pick a boost profile.

Then, set your wastegate to something reasonable (preferably lower than your boost target at redline, lower if you want decent part throttle response).

Then work on your PID.
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ME7.1 tuning guide
ECUx Plot
ME7Sum checksum
Trim heatmap tool

Please do not ask me for tunes. I'm here to help people make their own.

Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your ex
kruftindustries
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« Reply #24 on: March 24, 2021, 10:14:13 PM »

That makes sense Thank you. I had settled on 2.5CR@30lbs/min maximum. The MAF body is 74mm so I set MLMAX to 816.5kg/h based on that flow, hopefully that is ballpark correct? (I later found out MLMAX isn't used for engine calculations?)

If I can find the scavenger hunt 5120 functions I would like to run more than wastegate pressure. I actually think I have most of them found but one or more maps are not labelled correctly... Soon
« Last Edit: April 18, 2021, 08:24:09 PM by kruftindustries » Logged
kruftindustries
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« Reply #25 on: April 18, 2021, 08:00:33 PM »

While calibrating the MAF/larger housing I've noticed ps_w dives from 310millibar above to 270millibar below pvdks_w. At lower boost levels it's not such an issue but letting the turbo spool up a bit something is going to melt or adjust rods in a bad way.

I might need some MAF housing modification like a velocity stack and elements to promote laminar flow like the stock housing. I could be completely off here but judging by the voltage there is quite a bit of turbulence going on and the flow is not good enough for a velocity to flow translation the way it is now.

Could I calibrate my MAF using a known good MAP sensor or external pressure sensor vs rlroh_w or should I get a different MAF and be done with it? if so any suggestions on what part number?

Thank you.
« Last Edit: April 18, 2021, 08:23:06 PM by kruftindustries » Logged
aef
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« Reply #26 on: April 20, 2021, 01:18:57 AM »

http://nefariousmotorsports.com/forum/index.php?;topic=4839.0
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kruftindustries
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« Reply #27 on: April 20, 2021, 07:16:13 PM »

Thank you for that, my maf reads like a 66-67mm ID around idle and gets up to readings like a 73-74mm ID at higher rpm. I frankenstein'ed some curves together, fuel and timing are significantly better now. ps_w is slightly below actual all the way up. Wdkugdn needs some adjustment above 4k, the ps_w jump was from KFMLDMX being set too low. I guess I'll try to get msdk_w to match mshfm_w next.
« Last Edit: April 20, 2021, 07:42:26 PM by kruftindustries » Logged
nyet
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« Reply #28 on: April 20, 2021, 08:27:43 PM »

What you really are looking for is getting your fuel trims near zero with KRKTE/TVUB at theoretical.
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ME7.1 tuning guide
ECUx Plot
ME7Sum checksum
Trim heatmap tool

Please do not ask me for tunes. I'm here to help people make their own.

Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your ex
kruftindustries
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« Reply #29 on: April 20, 2021, 10:10:41 PM »

I started with KRKTE at odd values just to get idle right thinking I had a fuel delivery issue. Car had been sitting a long time before this thread. New MAF went into housing and got a new o2 sensor when I put the turbo on. I didn't think to investigate the maf values until I noticed timing was off and the weird KRKTE all made sense. KRKTE is theoretical now(TVUB from datasheet). Load tables fixed the calculated torque transmission kickdown problem too (last columns 100% I think). I learned a few bad habits using eurodyne way back, should have started here to begin with. I still haven't massaged the MLHFM all the way but it's becoming a driving car again

By the way, THANK YOU for tools and the wiki, hosted files all of it. I would be dicking with python and matplotlib and MIGHT have a puddle of oil and rods in my driveway if not for these resources.
I'm impressed by and have learned a lot from several people who have commented on this thread, it's nice to finally talk to some of you.
« Last Edit: April 20, 2021, 10:23:05 PM by kruftindustries » Logged
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