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Author Topic: Cupra R - Me 7.5 Stage 2 - Tuning Experience  (Read 2470 times)
ezorba96
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« Reply #15 on: February 07, 2024, 04:25:01 PM »

I fixed between 3500-6000 rpm's now problem is boost drops after 6k rpm,

Car doesn't feel powerful with extra boost levels.. Tried to adjust ldrxn on higher rpms to request more boost but Its getting limp mode again even with %5 changes.

Attached log is while having 100-200 run starting from 4th gear, Its 21.4sec -%1 slope

File, xdf and log attached below. Any help is appreciated.

« Last Edit: April 01, 2024, 06:51:08 AM by ezorba96 » Logged
aef
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« Reply #16 on: February 08, 2024, 01:57:31 AM »

On the 1st of february you posted funny pictures of ldrl and dimx totally modified.
Have you actually read what prj suggested to do?

your boost request is following your load request just fine.

start from scratch without making unneccessary changes to the file.
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fknbrkn
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mk4 1.8T AUM


« Reply #17 on: February 08, 2024, 04:33:19 AM »

Start from scratch

change only last row of iop to make a ~95% torque request, raise irl last row(s) to inverse iop with target at ~220%, change iop axis to reflect irl changes, no need weirdo peacks here



imx/drl fucked up completely

0 make torque safety cap with kfzw/2 180+%@3000 to prevent rods failure, thats already done just nail it
1 fill HBN with 2.0s to limit charge pressure to 1 bar, optionally ff NDLDRAPU to avoid underboost dtc
2 fill drl with zeros or unplug n75 connector
3 go get base boost
4 reflect base boost with KFVPDKSE axis as described in wiki (if its CWPLGU = 1)
5 reset drl to stock. you can limit 95% row at the 3000 area with some lower values, yes its stupid (say hi to some tuners  Grin) but no worries for a novice, personally i prefer more linear drl all over the map for a hybrid turbos
6 reset imx to stock, change axis to cover up to 1500 mbar boost, copy column of 3000 and paste it to higher rpms. lower values at high rpm at the rows near the base boost 
7 get logs, change imx axis/rows to get pretty flat 1 bar boost curve as the base. made a few pulls as usual from 1500 rpms and a few from 4000 as its different story
8 limit with hbn to 2.2 , and so on (and vice versa with lower boost settings - check 1.6, 1.8 also)

and only when youre able to run with any request boost wo issues, only then limit it as you wish with ldrxn or hbn

btw you didnt want some peak with hybrid as its capable to hold all the way to redline just keep an eye to fueling/timing
« Last Edit: February 08, 2024, 04:50:52 AM by fknbrkn » Logged
ezorba96
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« Reply #18 on: March 13, 2024, 07:03:05 AM »

At the end we figured it out car warping intake pipe, which is installed by old owner. I replaced It with oem. Car is working perfectly fine

Added +5 Timing advance. Installed wmi, Maximum -1.5 retard 
1.3 peak 1.1 cont until 7000rpm , 17.8s (-1%) 100-200 time recorded. I think Its not bad for car that 18'' cupra wheels and brembo brakes.

Next goal is having 1.3 continious boost, maybe I will have less timing. Let see where It goes.

What is your opinions about afr, I'm targetting 11.8 most of time, Is It worth to try 12.2. What is best afr on your experiences.
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pinokio1979
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« Reply #19 on: March 19, 2024, 10:19:51 AM »

I'm not an expert, but it's better to set the ignition so that the ECU does not reverse the ignition, knocking can be reduced by enriching the AFR, but cold air works best.
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ezorba96
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« Reply #20 on: March 25, 2024, 04:57:50 AM »

Now running 1.4 peak 1.3 cont boost timing is 21 degrees at last column, 100-200 time is 16.3s

Depend on outside tempereture, there is ignition retard between -1.5 to -3 , I will change methanol nozzle 300 to 500cc to see If that helps

Otherrwise, decrease timing and giving a bit more boost. But I don't want to past 1.5 bar with this turbo. With current boost peak maf value is 237g/s

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ezorba96
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« Reply #21 on: April 01, 2024, 06:55:51 AM »

After having logs this all ignition retards makes me want to check injector duty,

After 5500rpm Its going more than %100

So I decided to change stock bam injectors to 0280 156 280 450cc injectors which I already have as a spare part

Tvub is changed according to post https://nefariousmotorsports.com/forum/index.php?topic=1863.0

KRKTE is changed according to hammersword's krkte calculator.

Expect fuel consumption display correction, do I need anything to change before trying car with new injectors?
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