DIY Flash Tune Issue. Log attached. (N54)

[digitalashley]

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

 

[digitalashley]

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.

okay ill add a little load +5 in 4200rpm and taper from there with a little higher values.
peaking at 198 - 143 load. see how she likes.

i feel like i must owe you a cold one now thanks again chris

 

[TiAgAu]

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.

Something that was probably overlooked is your AFR, still very rich during spool to 4500rpm almost flat 11afr. I see you leaned it out 11.7ish up top which is good but compare it to the second log you posted here thats more like what you want.

 

[digitalashley]

Something that was probably overlooked is your AFR, still very rich during spool to 4500rpm almost flat 11afr. I see you leaned it out 11.7ish up top which is good but compare it to the second log you posted here thats more like what you want.

I leaned out 3k-4k a little and did some logs today .
I didn't wanna go too lean, but let me know what you think cheers,

datazap.me | Digitalashley | Custom v1.0.5.2 3-4k rpm leaned a little (3)

datazap.me

How's my timing corrections looking? Most logs the look fine but I do see some times early in the logs it's correcting a bit, this something to be looking into?

I find when going up through the gears 2,3,4 that there seems to be a bit of a bogging?, hard to explain but dies off a bit more than I think I used to get with stage 2+ like something's going on. Didn't get any logs with multiple gears except one but I don't think it was any good of a log so haven't uploaded. Might try logging tomorrow and see.

 

[chrisdfv]

Log looks much cleaner. Still has some oscillations, but it's not bad. I would lower base just a tad so PID stays adding just a little during the whole log. You are less likely to see oscillations this way. AFR is still very rich. During spool especially.

 

[digitalashley]

Log looks much cleaner. Still has some oscillations, but it's not bad. I would lower base just a tad so PID stays adding just a little during the whole log. You are less likely to see oscillations this way. AFR is still very rich. During spool especially.

okay ill use the d-factor multiplier to lower the base a little.
with the AFR during spool should i still be using the base fuel map or the fuel spool specific map?

 

[chrisdfv]

okay ill use the d-factor multiplier to lower the base a little.
with the AFR during spool should i still be using the base fuel map or the fuel spool specific map?

Base should be lowered using the adder or WGDC Base Table.

Depends if you have spool mode enabled and what RPM exit is, compared to where you are in the logs.
If you are out of the spool mode range, then it will be the main table.

 

[digitalashley]

Base should be lowered using the adder or WGDC Base Table.

Depends if you have spool mode enabled and what RPM exit is, compared to where you are in the logs.
If you are out of the spool mode range, then it will be the main table.

my bad misunderstood. i was thinking lowering the base was lessening the oscillations via the d-factor.
with lowering the base via this log
https://datazap.me/u/digitalashley/custom-v1052-3-4k-rpm-leaned-little-3?log=0&data=3-23-26-29-31
would i need boost set point logged? as its axis y on wgdc base?

i dont believe i have touched spool mode except the max rpm set to 2750rpm
that does make sense so im definitely looking at the main table then

 

[chrisdfv]

would i need boost set point logged? as its axis y on wgdc base?

i dont believe i have touched spool mode except the max rpm set to 2750rpm
that does make sense so im definitely looking at the main table then

Yes. You need to log boost set point, to determine where in the table you will need to bump the values down.

 

[digitalashley]

Yes. You need to log boost set point, to determine where in the table you will need to bump the values down.

okay awesome, so setpoint and maf req wgdc g/s or just the maf g/s ?

 

[chrisdfv]

Req wgdc g/s

 

[digitalashley]

Req wgdc g/s

Cool that's what I used to adjust the base made sense to me.

I'll probably try logging the newest map tomorrow and see how she goes.

With regards to timing, is that something you have changed yourself or know what could work based from logs?

I should have good stft now, and the base will hopefully be lower and result in no oscillations. If so I wanna work through what else I should improve for my n54

 

[digitalashley]

How's it going thought I'd put up a link to my current log I'm curious if I should/if it's okay that I have a small amount of overboost (over Target) early in the run.
I'm thinking I should lower my wgdc base a little more but before I do felt it might be a good idea to get some info while on break.

datazap.me | Digitalashley | V1.0.5.8

datazap.me

 

[chrisdfv]

It's not really an issue, but why not make it perfect. Log looks good.
Good work.

 

[digitalashley]

It's not really an issue, but why not make it perfect. Log looks good.
Good work.

I'll do my best to make it nicer toward the start. Pretty happy now with my own map it's fun learning what changes what etc.
Are there any tables or things people improve I should log and look at. I was thinking timing might be interesting. But probably only if I lower the load a little (boost) ?

 

[chrisdfv]

I think your timing looks pretty good for 93oct.

 

[digitalashley]

With the max spool rpm mine was stock at 3000 rpm it seems like other online have theirs at a lower number stock,
I've currently got it set 2750rpm can't recall why if it was from v8baits xl sheet or somewhere else but I was wondering what might happen if I put it back to 3000rpm .
It'll stay in spool mode longer would that mean boost would be quicker or better in someway?

Chris do you run your n54 on an E mix or 98ron/93oct map?

I might look into prices and methods for fueling upgrades in future for better knock resistance/POWER! Haha.

 

[chrisdfv]

You can raise spool mode to 3k. It won't be an issue. The dme will exit spool mode as you reach target anyways.

At the moment I run full e85.
On stock turbos i ran a walbro 450 with the rest of the stock fuel system. With an e50 blend, I made around 450whp with inlets.

 

[digitalashley]

Oh I see, that makes sense.
Nice where I live currently is a tiny Town just outside the city I go to for work and the city has 1 petrol station that sells e85 so I could get away with fueling just e85 it'd be a little bit of a pain, but worth it once I've got the correct fueling system .
Are you currently upgraded with your turbos?

The walbro 450 I assume was like this one in the link

Walbro 450lph High Pressure E85 Intank Fuel Pump

Walbro high pressure E85 compatible intank 450lph fuel pump

www.msel.co.nz

Did you just pull out stock and replace? No extra parts to have it fit/work?
450whp sounds nice haha

 

[TiAgAu]

How's it going thought I'd put up a link to my current log I'm curious if I should/if it's okay that I have a small amount of overboost (over Target) early in the run.
I'm thinking I should lower my wgdc base a little more but before I do felt it might be a good idea to get some info while on break.

datazap.me | Digitalashley | V1.0.5.8

datazap.me

Fuel trims were looking good before. What did you change there since last log? DME is trying to add fuel almost 20% personally i'd rather see a slightly -negative number

As for walbro fuel pump here is a DIY. Or some go for the bucketless setup

 

[digitalashley]

I put about 13litres of e85 into the tank a week back just to see what it's be like.
So that'll be why the fuel trims took a bit of a beating.
But yeah I was slowly moving the trims so they were 0 or negative.

As for the tuning now though I'll have to put on hold since I had a person pull out and stop, causing me to ruin my car. just now. rain didn't help . FML right before heading home.

So sad car was mint