marto7
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« on: August 23, 2019, 08:18:56 AM »
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The car is 2005 Audi A4 B7 1.8T Quattro. The things i changed is:
- Turbo K04-064 from Audi S3 2.0tfsi
- Bosch 630mm injectors with 4bar FPR
- Maxspeeding rods 20mm with Pistons from S3 1.8t
- 3" downpipe with 2x2.25 pipes after that
- S3 1.8t Maf housing - 70mm
The problem is the car have a big lack of performance.I feel it like my previous Audi S3 with stock hardware and only tuned to 250hp. Now with car that weight almost same and a lot bigger turbo i feel same.The first thing that i found on my tune and already fixed was bad scalled MAF housing.Today i scaled it right with nefmoto tool and write it on the car.There is little or no difference than previous tune.I have log with me7logger and will upload it with my original tune and my last tune - after all the hardware changes. Please help, what causing this lack of performance and which things need to be corrected.Will upoad new logs if needed.Thanks.
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nyet
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« Reply #1 on: August 23, 2019, 08:21:17 AM »
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I can't find anything obviously wrong with this log.
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marto7
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« Reply #2 on: August 23, 2019, 08:44:41 AM »
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I can't find anything obviously wrong with this log.
IS that mean the tune is perfect and this is the max of this setup ? I expected more power from this turbo. |
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nyet
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« Reply #3 on: August 23, 2019, 08:49:44 AM »
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Well your actual boost is a bit short of requested (you might need a bit more IMX), but you're almost out of WGDC so there isn't much boost left anyway AND you shouldn't be requesting anything near the MAP limit (i assume this isn't a 5120 file)
You're also riding KR at -3deg, so no room left for timing.
The only thing you have left is some injector DC, so you could add fuel and see if you can get timing back, but at some point you'll just be puking black smoke.
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prj
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« Reply #4 on: August 23, 2019, 08:52:07 AM »
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Uhmmm....
What about 0.85 lambda and 6 deg ignition at revlimiter.
I think one pull to 200-250km/h and the engine will melt.
There is no power because there is way too much boost for the compression ratio and there is no timing. And it's way too lean.
-15% lambda trim etc etc.
Also makes me think OP didn't tune it himself either.
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nyet
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« Reply #5 on: August 23, 2019, 08:54:54 AM »
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Uhmmm....
What about 0.85 lambda and 6 deg ignition at revlimiter.
I think one pull to 200-250km/h and the engine will melt.
There is no power because there is way too much boost for the compression ratio and there is no timing. And it's way too lean.
-15% lambda trim etc etc.
Welcome to 91oct tuning. Well, except for the bad trims. |
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marto7
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« Reply #6 on: August 23, 2019, 09:16:18 AM »
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@nyet Yes this isnt 5120 file.I have boost meter in the car to check if the pressure goes above 1.5bar.
@prj What should be the timing and lambda on revlimiter ? Is this the only place where it need to be changed ?
The tune is made by tuner, not by me.Im newbie and now learning how the things works.The scaling of the maf is my first thing that i done to my tune.
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nyet
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« Reply #7 on: August 23, 2019, 09:21:20 AM »
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@nyet Yes this isnt 5120 file.I have boost meter in the car to check if the pressure goes above 1.5bar.
@prj What should be the timing and lambda on revlimiter ? Is this the only place where it need to be changed ?
The tune is made by tuner, not by me.Im newbie and now learning how the things works.The scaling of the maf is my first thing that i done to my tune.
For completeness you should fix your trims. But you aren't going to pick up any power. |
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marto7
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« Reply #8 on: August 23, 2019, 11:38:26 AM »
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For which map need to look? Thanks.
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BlackT
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« Reply #9 on: August 23, 2019, 11:48:10 AM »
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Log ps_w
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marto7
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« Reply #10 on: August 23, 2019, 02:29:27 PM »
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Log ps_w
Made 2 logs.All previous map + ps_w. First Log is 3rd gear to redline. 2 is 2nd full, 3rd full + part of 4rd. |
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marto7
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« Reply #11 on: August 24, 2019, 04:58:25 AM »
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Is ps_w good ? Where i need to enrich ? From 4500 till end ? And how much ? 0.5 or less ? Can somobody help with fuel trims
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BlackT
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« Reply #12 on: August 24, 2019, 06:22:24 AM »
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your MAF is underscaled
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marto7
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« Reply #13 on: August 24, 2019, 06:33:14 AM »
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I used MAF scalling tool here in Nefmoto to scale it.Older housing was 60mm inside diameter and now i am with 70mm.
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BlackT
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« Reply #14 on: August 24, 2019, 07:35:58 AM »
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Still not good, scale it more... ps_W need to be below boost presure(you have all description in wiki tuning, read it several times i sugest you)
If you dont have boost leak
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