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Driveline, Engine & DME Tuning
Talk about driveline improvements, NA tuning and DME tuning your E46 BMW here. This includes diffs, intakes, exhausts, chips, software and OBD tuning.

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Old 09-14-2019, 05:01 AM   #7521
Blu302
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Originally Posted by e4646 View Post
Cheers all around.

Got some issue with my car through customizing.

My topic is not about the question if the max values are true or not. It is about the differences in them.

Following my logging output (see pics) the engine performs perfectly fine in 2.nd gear. Wonderful torque curve, perfect power line. Subjective, too! Pulls impressive out after 5000rpm.

In 3rd gear torque and power falls away above 5500rpm. No matter what I do, nor what I change in file. Subjective it fits, too.

Already tested different intake. Moved torque max and torque curve shape clearly and flattend the up rpm curve a little.

Used Car-Hardware:
-E46 330i, M54B30, ebay headers, underfloor cats (OEM), standard middle silencer, 330d final muffler (chamber free)

Used Logging Software:
-Scanmaster OBDII -> captures rpm and time, uses gearbox values and tire size (and weight / cw / etc.) to calculate acceleration and with this torque and power

Used settings:
-Scorps beginner values for nearly stock cars (and some mods from my own of this)
-"sharkish" settings

I am not sure if the problem is based on the logging algorythm / lack of logging speed intervalls or hardware based or custom file based.

Hints are welcome!

Btw: Everybody looking for a cheap, relativly silent muffler, go for the 330d one.
You need to account for the delay in the vanos getting into position.
The higher the gear, the more time it has to get where you tell it in the tune because the revs climb slower. The DME has a limited capacity in preempting the delay and position required, but I stress limited.

Don't forget that 5th is 1-to-1 in these cars.

If you can log the actual cam position to rpm and load, you will have the correct desired position for the tune.

That delay is why I have my full load position hit long before full load starts.

For those playing with the underlying code(sda2 etc), a way to help fix this delay is to change the vanos calculated load to be closer to the injection/ignition load. I.e. remove/reduce the filtering to allow the vanos load to catch/track faster.
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Old 09-14-2019, 06:17 PM   #7522
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Im looking for the maps that control air intake temp relations for timing and vanos. Anyone know?
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Old 09-15-2019, 01:29 AM   #7523
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So... for comparability reasons I also did a few runs with the road dyno tool.
For me I don’t see any advantages running it in second gear since engine speeds are high while the measurement is low in speed. You only get a good resolution while running a higher gear but you will need a good public road, no traffic or a proper highway also at night. Also wondering a lot about the „power“ delivered in second gear. I kept the steering wheel straight while going on a very flat road every single time.

I will also test run the 4th gear on the highway a few times and see where we go.

I am still pleased with the results at the moment.

First run in second gear, second in third.






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Old 09-15-2019, 04:24 AM   #7524
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Originally Posted by donBogi View Post
So... for comparability reasons I also did a few runs with the road dyno tool.
For me I don’t see any advantages running it in second gear since engine speeds are high while the measurement is low in speed. You only get a good resolution while running a higher gear but you will need a good public road, no traffic or a proper highway also at night. Also wondering a lot about the „power“ delivered in second gear. I kept the steering wheel straight while going on a very flat road every single time.

I will also test run the 4th gear on the highway a few times and see where we go.

I am still pleased with the results at the moment.

First run in second gear, second in third.






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What it the program?
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Old 09-15-2019, 05:46 AM   #7525
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Biggest MS43 tuning thread ever! Incl software...

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Old 09-16-2019, 02:02 AM   #7526
Blu302
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The software looks good, I have been stuck with Testo logging and doing the maths in Megalog Viewer.
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Old 09-16-2019, 03:18 AM   #7527
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MAF flow B25

Hi Guys, can someone share with me LOG or information about maximum MAF flow at engines M54B25 stock and B25 with B30 intake?

I try to log my M54B25 and in 6300 rpm have 540 kg/h but we also tune on dyno another B25 with B30 intake include MAF (changed in MS43 to B30 MAF) and measure max 480 kg/h in 6500 rpm. I dont know now, if my MAF is in bad condition or the another engine is dead ... on dyno B25 with B30 intake include B30 MAF, catless exhaust, 151,4 KW at 6500RPM on crank (calculated from wheels)
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Old 09-16-2019, 04:28 AM   #7528
e4646
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You need to account for the delay in the vanos getting into position.

[...]

That delay is why I have my full load position hit long before full load starts.
Did this and it worked well!

I increased values in PL cam in and ex from 325mg/strok up and 4100r/min and made FL map similar.

Also recognized that I made a mistake that distorted my measurements with increasing speed, explaining well the differences in my early measurement from second to third gear in upper revs (5000+).

For now I am really confident. I assume the third gear values to be the most realistic. Giving ~ 204kW and 350Nm at the engine with rev limit at 6600 and with only ebay header and still using cats.

Problem here is the same as bogis. To find a straight street long enough to come in third from 2100 to 6500.

Edit: @scorp

Base maps were already oriented at the "shugu" map (you shared already earlier). Again also big THANK YOU.

Edit: BTW @Deathstalker256 for comparison -> maximum measured airflow at my engine is 630kg/h.
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Old 09-16-2019, 05:06 AM   #7529
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Originally Posted by Deathstalker256 View Post
Hi Guys, can someone share with me LOG or information about maximum MAF flow at engines M54B25 stock and B25 with B30 intake?



I try to log my M54B25 and in 6300 rpm have 540 kg/h but we also tune on dyno another B25 with B30 intake include MAF (changed in MS43 to B30 MAF) and measure max 480 kg/h in 6500 rpm. I dont know now, if my MAF is in bad condition or the another engine is dead ... on dyno B25 with B30 intake include B30 MAF, catless exhaust, 151,4 KW at 6500RPM on crank (calculated from wheels)


Your reading with 540 kg/h is quite good, stock should be around 520-530 as far as I can remember. Mine is 530 around 6000 u/min and goes up to 570-580 kg/h depending on environment, having the intake and b30 cam in.
As far as I remember, gains are around 15-20 kg/h with the intake.

The other engine sucking in only 480 kg/h has some issues somewhere...


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Old 09-16-2019, 10:05 AM   #7530
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Originally Posted by scorpionreptyle View Post
https://drive.google.com/open?id=1vy...FIm4FeWAnFdUQQ -e36 swaps ,manual ,v56 ,stockish engines ,EU

https://drive.google.com/open?id=1V8...wm1dYu27CZBK35 -was on e46 manual ,v56 ,stockish engine, EU



moderate improvements , use them as you pleased ,on your own risks. Those are old, but puffier over stock at that time
i see that you've uploaded recently another file called "shugu" in the ms4x forum and it's totally different.
Which is the best one?
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Old 09-16-2019, 12:18 PM   #7531
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Originally Posted by donBogi View Post
Your reading with 540 kg/h is quite good, stock should be around 520-530 as far as I can remember. Mine is 530 around 6000 u/min and goes up to 570-580 kg/h depending on environment, having the intake and b30 cam in.
As far as I remember, gains are around 15-20 kg/h with the intake.

The other engine sucking in only 480 kg/h has some issues somewhere...


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look for leaks, i have this issue after a intake swap.
log and you will read poor mix
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Old 09-16-2019, 04:07 PM   #7532
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lol, found the axis adjustment at the top of the window
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Old 09-17-2019, 12:56 AM   #7533
Deathstalker256
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look for leaks, i have this issue after a intake swap.
log and you will read poor mix
I thinking same, but lambdaintegrators was ok, portable wideband show AFR ok also....
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Old 09-17-2019, 02:12 AM   #7534
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I hit the apex this morning on the highway at rather low temperatures (16 degrees Celsius)



This was the measurement from yesterday going downhill on the left and uphill on the right diagram.

Don’t see much room left for improvement without a proper exhaust manifold.




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Old 09-17-2019, 02:17 PM   #7535
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i see that you've uploaded recently another file called "shugu" in the ms4x forum and it's totally different.
Which is the best one?

honestly...i dont know whats the last/better one ,i made 1 variant that went good, then i try a second variant where i changed some of the things that "shugu" (its a person) didnt like. If you take the e36 variant,you can compare it against those 2 shugu bins,the one closest its the last. Or you can simply try them both and see whats suits you. I usualy try on the road the car where i make changes and keep all the files from all the cars we fiddle with,this produce lot of mess. But since i am a "private" guy that dont do services,except for me and my friends) ,its not a real problem.
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Old 09-17-2019, 02:26 PM   #7536
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Originally Posted by donBogi View Post
I hit the apex this morning on the highway at rather low temperatures (16 degrees Celsius)



This was the measurement from yesterday going downhill on the left and uphill on the right diagram.

Don't see much room left for improvement without a proper exhaust manifold.




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i still think that you should go for the second gear,starting from lowest rpm possible through highest one. The good result is the one with a nice power band (NM) ,without wheelspin and without SPIKES. On a bounce the wheels may loose contact and after regain it will smudge the chasis,making calculations wrong (higher reading at that grip regain moment). All the "calculators" on the road MUST be done in the lowest gear possible that wont loose grip and last at least 4~5 secs. On a gasoline car ,2nd gear is the best,except where lots of power is in charge- this case,the next gear is recomended. Diesels runs fine in 3rd gear, with the same rule applied. Exact weight of the vehicle in the moment of test is CRUCIAL for accurate calculations.


Look on 2nd vs 3rd gear powerband (on those pics) and depict wich one is more accurate... Also,you can overlook on eventual problems relating vanos setup when smooth graphs are displayed. If those graphs are accurate,there is an unoptimised cams position between ~6k-6.5k rpm
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