DIY Flash Tune Issue. Log attached. (N54)

digitalashley

Specialist
Apr 8, 2019
50
Hi everyone,
Hoping someone can shed some light on why my N54 is having throttle closures in this section of RPM range (3,500-5,000 RPM).
Can feel the car having some type of trouble getting up there when trying to do the runs until higher RPM is reached, log shows fluctuations in throttle position.
Traction control is fully off.
Timing corrections are looking fine.
I'm assuming it might be related to my fueling ratios which are based from stock, i've only adjusted the higher rpm and load range with the (11.000) as attached image references to.
Here is my log;
[url=https://datazap.me/u/digitalashley/4th-gear-pull-throttle-closure?log=0&data=2-3-24-25-26-27]https://datazap.me/u/digitalashley/4th-gear-pull-throttle-closure?log=0&data=2-3-24-25-26-27
I've attached a screenshot of my fuel map if it helps at all.
Also here is my car with it runing on a OTS MHD Stage 2+ map for comparison;
[url=https://datazap.me/u/digitalashley/n54-stge-2-intrcoolr-etc?log=0&data=2-3-5-22-23-24-25]https://datazap.me/u/digitalashley/n54-stge-2-intrcoolr-etc?log=0&data=2-3-5-22-23-24-25
New to this all so hopefully ive added enough infomation.
Ashley.
Attached Files
 

Attachments

digitalashley

Specialist
Apr 8, 2019
50
You run way to rich.
your TC is from running boost over target, lower wgdc or raise target.
Thank you for replying, am I running way to Rich at high RPM high load? .
When you say lower wgdc do you mean the percentage? I have that at 75% and lowering Target would that be load Target your referring to?

Thanks again
 

chrisdfv

Corporal
Aug 29, 2017
260
You need to lower base wgdc. The easiest way is to lower your adder above 200 MAF since Pid is removing duty cycle the entire log. You also have oscillations, but take care of the base first, and you can focus on smoothing things out if need be. AFR is pretty rich as well. You can run 11.6-11.8 in high load, high RPM.
27104
 
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digitalashley

Specialist
Apr 8, 2019
50
You need to lower base wgdc. The easiest way is to lower your adder above 200 MAF since Pid is removing duty cycle the entire log. You also have oscillations, but take care of the base first, and you can focus on smoothing things out if need be. AFR is pretty rich as well. You can run 11.6-11.8 in high load, high RPM.
View attachment 27104
Chris thank you for the detailed info I'll make some adjustments today and see how I go, probably will post up results as well.

May I ask,
With my stft are those bad? I was assuming that I needed to richen the 3,500-4,500 rpm area in my map since they were adding fuel would that be incorrect as I've seen others mention that as long as they are under 10% it's fine?
Or maybe I'm getting ahead of myself and just need to correct the boost first.

I'm trying to learn and create my own map where it can within some reason reach higher boost levels than mhd stage 2+ . Was thinking 20psi peak.

I've started a couple courses over at hpacademy.com to build my knowledge as well which has been helping.

Thanks again
 

chrisdfv

Corporal
Aug 29, 2017
260
Your fuel trims could be bumped up maybe by .02 in your scalar from 3.5-4.8k. The rest looks fine. They're not bad, but if you want them perfect you can adjust.

I would still suggest adjusting you AFR target like I mentioned before, 11.0 target is pretty rich.
20psi is pretty aggressive for 93, but you can do it. Just keep on eye on your timing. That much boost will most likely yield corrections. Log and evaluate.
 
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digitalashley

Specialist
Apr 8, 2019
50
Since my adders were too high i would post what i had them set to for Ref.

27109



and now, before testing out, still might be set too high im not sure. but i shall log and see
27110
 

digitalashley

Specialist
Apr 8, 2019
50
hey guys i tried the lower adders like in my last reply.

here is a link if you could have a look would be great.
theres a couple logs you can switch between also.

https://datazap.me/u/digitalashley/couldnt-read-log-mhd?log=2&data=3-6-24-29-30-31

still having the issue with the base being high.
i haven't actually made any changes to P.I.D not sure if thats the issue though, do people adjust that when increasing boost?

ive been trying to follow V8Baits great guide.
 

Jeffman

Captain
Jan 7, 2017
1,410
You’re WGDC still oscillating. Have you tried the stock WGDC PID tables? They’re pretty good for controlling WGDC. IIRC, that’s what I have essentially in my self-tuned IJEOS car.
 

chrisdfv

Corporal
Aug 29, 2017
260
Your base is probably good as is. Just lower D factor multiplier in the rpm range that’s giving you oscillations. That’s the easy way out. It looks like you may have started off with an SPX map. iirc they have very high p-factor to add pid but very little to remove in overboost. If you want to put some more balance into your p-factor you can try stock values and tweak. The stock ones are a little too touchy for my taste but you can log and tweak as you see fit.
 

digitalashley

Specialist
Apr 8, 2019
50
okay ill leave the base for now. a SPX map? ive only used my stock bin file from factory, and changed in v8baits guide.
i did however not change any PID values based on v8baits information. i have just looked at that guide and lowered my D-factor based off him saying he divides the whole table in half then the top left in half again. that should help. ill test and if oscillations continue then lower my D factor multiplier? should i adjust my p-factor as its currently stock?
 

chrisdfv

Corporal
Aug 29, 2017
260
okay ill leave the base for now. a SPX map? ive only used my stock bin file from factory, and changed in v8baits guide.
i did however not change any PID values based on v8baits information. i have just looked at that guide and lowered my D-factor based off him saying he divides the whole table in half then the top left in half again. that should help. ill test and if oscillations continue then lower my D factor multiplier? should i adjust my p-factor as its currently stock?
If your p-factor is stock just leave as is for now. One change at a time is best. If you've already lowered the d-factor table, that should help with the oscillation.
 

digitalashley

Specialist
Apr 8, 2019
50
The last log looks very good. Base can still come down some in the mid range, and You can probably taper load less up top and see how she does.

here is a log after fuel base leaned to 11.8 in high rpm/high load and scalar increased in 3300-5000 rpm. d-factor lowered a little more also -.02
d-factor multiplier not changed yet though.

there is two logs on that page to switch between also.
https://datazap.me/u/digitalashley/...cillations-better?log=1&data=3-23-27-29-30-31

should i lower d-factor or the d-factor multiplier more so wgdc after pid is further away/higher than it.

tapering load up high would help with that base and after pid?

im wanting to aim for my logs to look like;
so i guess smoother

https://datazap.me/u/digitalashley/n54-stge-2-intrcoolr-etc?log=0&data=2-3-5-22-23-24-25-29-30-31

but with more power, higher boost.
 

chrisdfv

Corporal
Aug 29, 2017
260
Your base is pretty much spot on. After pid is so close because you’re hardly having to add PID to base, to reach your target.

I would add more load request simply because there’s power left on the table with so much taper.
 

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