[jack2829]

Hi All,

Newbie here. To be honest, i was a bit skeptical on JB4, during my desktop research about a month ago. I was comparing various chiptuning i.e racechip, DTE system, Ventura. Finally, all was down to Ventura and JB4. I've even called up ventura and scheduled for a meet up with the Ventura distributor in my country. The reason why i've shortlisted JB4 and ventura is that both have 2 additional connectors. V has one for the fuel press and camshaft while Jb4 has fuel press and wastegate.

Anyway, ive kinda booked a JB4 from my fellow bimmer bud earlier, i've to honor the bro code so i went on with JB4. Mine came complete with bt connect +ewg+ff.

Ive tested it progressively from MAP1 until now MAP6.The experience was educationally experimental. I've learned many things about how the turbo works based on the parameters in the log readings.

Initially there were sort of misfire/jerking on MAP 1-3 at mid RPM. Eventually it smoothed out and i can feel the additional power coming from the extra boost. The jerk was on and off, maybe my AFR was too lean.. idk..The AFR is lean maybe because the dropin BMC filter and i'm still on stock exhaust system.

Anyway, few weeks after i've moved to MAP 6. I did trial and error with the user adjustment settings until finally end up with the settings i'm currently using now. There was a few hiccups along the way, i.e my EWG went dead and my engine was not boosting. Error says wastegate sluggish. So what i did was changed the PID gain to 8 and set the FF/wg to 50 among other stuffs.

All went back to normal after that. The performance increase was substantial until i totally forgot about the Ventura dude. Anyways, went and met him eventually as he let me drive his car and tested the Ventura where he had it on MAP 5/6. OMG! its nowhere near JB4 performance! btw he's driving same car, maybe 2016 version, mine is 2017.

Anyway after each pull he's like, "can u feel the power bro" and i was like well... yeah.. good job bro" deep down i just smirk in happiness. So yeah, credits to all my friends who have pass me this black box of joy and guided me throughout my JB4 settings.

Owh yeah, i did a run on the dyno and the result was so satisfying.
312WHP 454Nm with stock meow and RON 98.

Sorry i doubted JB4, rookie mistake.

p/s: I've ordered few parts to be installed next week FTP aluminium intake, charge pipe and custom meowless exhaust.

Can't wait..

Appreciate experts comments on my log.

Thanks guys!

[Payam @ BMS]

That is very impressive for the B48! Log is very healthy as well.

[jack2829]

Originally Posted by Payam @ BMS

That is very impressive for the B48! Log is very healthy as well.

Thank you Sir. Just to add 0-100km is 5.8 sec. Feels good.

[CapitaineBeaver]

That is impressive and is giving me even more hope to squeeze out more horses without going to meth. The B48 is suprising quite a few cars at the track (including JB4’ed 335)

[jack2829]

Hi All,

so ive upgraded charge pipe and intake pipe. Reset FF to 50 and letting it learn again. Here's the log..

[jack2829]

Hi Guys,

So over the weekend i'e installed the ***** downP. The cold start and spooling sound is totally loud, significantly loud. i'm down with that.

So i did a few pulls and it seems its running a bit high at the low RPM AFR.

Then i did a century sprint, it seemed quick, sadly CEL came out.

101F01 Throttle valve opening angle pressure -- ignore, tuner code
123511 Wastegate Flap sluggish
120408 Reduced power mode

Appreciate experts review, comments and suggestion. Logs attached

[Payam @ BMS]

Looks really strong to me man. Raise open loop to 65 and get another log.

[jack2829]

Thanks for the review, Here's another log.
I was recommended to use this (attached) settings by my friend. The pull feels a bit restricted at low RPM and felt under boost.

Perhaps i should change back to my old settings but just with the FOL adjusted.

Appreciate your advice.

And i'm not sure the use of FuA. Do i have to set it due to the changed D-P?

Thanks

[jack2829]

I tried map 3 last night.. thrtl osculation throughout the pull.

[RMM]

does your engine have the 10.2:1 compression of the 30i or the 11:1 pistons of the 20i's?

for 11:1 motors should have max 18 psi target unless you have better fuel, your last log targeted about 20 psi, that too much I think....

try map 6 with like 17 psi peak boost and you should be smoother, also can try to set FF lower as your WGDC is too high and it is over boost

[jack2829]

The last log is from map 3. i`ve never used that previously, i was just testing it out.. it went over boost target and it was scary..

i normally use map 6 and boost is set at 15 flat, (65)FOL and (50)FF and it always goes bck to 1.

btw mine is 11:1.

so now im back at map 6 playing with the FUA and FOL..

I`ll post logs soon.

[RMM]

it looks like same engine as my car basically, I ran up to 17 psi with 93 RON fuel and it ran pretty good

comment on your map 6 log:

add more negative WG offset until the FF goes up to a more normal value like 50 or something

try 16 psi up form 15 but at 3500 to 5000 RPM, and keep watch on your fuel trims

take your WG offset form 8 to lets say 12-15, that should give the FF a chance to do something, increase your duty bias values if you need more WG / boost at different RPM, for example increase form 30 to 40 at 4500, 5000, 5500 RPM may give you more boost in that region based on your log

might want to try increase PID gain to 10 as well, this will increase the amount of WG offset when you are under or over target

[jack2829]

Hey guys here's my log and settings.

So i've increased the PID to 10 FUA dropped to 2. Not sure what u mean by WG offset? u referring to FUA? if so, higher numbers doesnt really work for me setup.

Anyway do check out the logs.

Thanks!

[Payam @ BMS]

I don't see anything wrong with the log, looks strong and exactly where it should be.

[jack2829]

Hi Payam,

Thanks for reviewing, i guess it's just the thrill/obsession with speed. Getting used to the current speed, and wanting more felt like the car is under performing.. maybe its just me.. i'll run a dyno this weekend and see what the numbers say.

or perhaps i need a new sets of rubber for better traction.. these Pirelli P7 doesn't put the power down..

[RMM]

yah looks pretty good, I'm interested to see what you run at the dyno, please post your results, try to get log of the dyno run as well if you can

FF is 42 as well which is more normal, so just leave your FUA at 2 should be fine, you could try FUA higher like you had before if FF learns a little higher to compensate it may be better overall like that, less chance to over boost for example, at 8 where you first had it, you may need to make 3-4 runs to give time for FF to learn and get the boost back up again

if your FF is 42 and your duty bias at that RPM is 30 and your FUA is 2 the actual FF component would be something like ((42/100)*(30/50) - 2/100)

https://www.n54tech.com/forums/showthread.php?t=29893

[jack2829]

Thanks RMM, appreciate it. I still feel like trying to increase duty bias at 40 as per recommended and see how it react..

will update soon.

[jack2829]

Hey Guys,

Fortunately i have to go for a road trip for work today, and traveled for 500km.

I've managed to log before and after FF learning.

Appreciate your comments.

Below are the settings ive used.

[Payam @ BMS]

Very good after the second pull on adaptations. Looks healthy.

[jack2829]

Thanks Payam.

[jack2829]

Hi All,

It's been a busy week for me.. However i've managed to let the FF learn and adapt throughout the week and did a dyno run with logs.

After the dyno i did a long pull in a close drag strip, and its a long pull..

Attached logs and dyno results.

Appreciate any comments...

My tingling feeling that i'm allllmost there! just a lilllll bit more.....

Feeling good...

p/s: for those thinking of getting one.. go ahead and buy one.. its worth it.. it's a learning curve.. endure it and get rewarded with sweet G force!

Thanks.

[RMM]

might try rise your target to 17 form 3500 - 4500 RPM, that will help with the throttle closure shown in the dyno run

or alternatively reduce the DB in that region a little (by 5-10) to prevent it form boosting over target, either way should prevent the throttle closure to occur

[Terry @ BMS]

Originally Posted by RMM

might try rise your target to 17 form 3500 - 4500 RPM, that will help with the throttle closure shown in the dyno run

or alternatively reduce the DB in that region a little (by 5-10) to prevent it form boosting over target, either way should prevent the throttle closure to occur

The throttle movement is caused by the DME dropping it's target there. You can see minimal impact on the manifold boost, though. So probably not causing an issue.

[jack2829]

Thanks Terry, and finally i think it's normalized..
FF stable at 40 ish

It was a nice pull..smooth..

Attached log.

[Nanometer]

Is that your timing on some of the cylinders taking a hit?