Logs on B46 for review - N54Tech.com

Ghozthunter · **Logs on B46 for review -** 01-01-2021, 01:45 PM

Am new to the tuning world and would like to learn more. This is my first time using a jb4 and got some logs starting at 2k rpms on 3rd gear turning off dsc and going WOT (hope i did it right)
This is on a 2019 bmw 330i b46 only mod I have is full CAI kit, temp outside was 55f.
One of the logs may not be done right but ill post it.
I have noticed the sound coming from turbo was louder on my jb+ than with jb4 and more pops from exhaust on jb+ but definitely feel more power now.
Any help will be greatly appreciated.

ckethe99 · 01-01-2021, 01:57 PM

Right now your currently using an additive boost map, the absolute maps are where the magic happens. Logs look ok, but fuel trims are high and are sometimes maxing out, bump your fuel open loop value up from its current 60, to 70 and relog.

Ghozthunter · 01-01-2021, 02:09 PM

Thank you, please forgive me for the dumb questions but what is absolute map? I have set it to map 3. Am a newbie I know lol
I have made the changes and will relog.

ckethe99 · 01-01-2021, 02:18 PM

You're currently using map 3, which is a additive map, meaning, it takes the boost the factory engine computer is making, and adds a value onto that number. In the case of map 3, its 6psi more than what the factory is making, so if the factory computer was sending 10psi of boost to the turbo, the jb4 will change that number to 16.

An absolute map completely overrides the computer, and the jb4 fully decides the boost, the advantage to this is that it is much smoother.

At some point when you choose to, you can move up to a absolute map provided you have the EWG control wires.

Ghozthunter · 01-01-2021, 02:23 PM

Got it. Thank you for clarifying that. I will purchase a EWG wire for it now lol

ckethe99 · 01-01-2021, 02:28 PM

Yup, no problem. Bump up the FOL to 70, and go enjoy your car! Happy New Year!

KnifeEdge87 · 01-01-2021, 07:35 PM

Quote:

Originally Posted by ckethe99

Yup, no problem. Bump up the FOL to 70, and go enjoy your car! Happy New Year!

It won't do anything on the B series engine

The jb4 for b series doesn't hook into the fuel pressure system

ckethe99 · 01-01-2021, 07:41 PM

Thats weird, I remember reading about the FOL adjustment actually working, but come to think of it, your right about there being no fuel interfacing with the jb4.

Ghozthunter · 01-01-2021, 08:21 PM

So its a no go then am assuming lol

Another dumb question coming. Which EWG connector do I order?

KnifeEdge87 · 01-01-2021, 08:44 PM

Quote:

Originally Posted by Ghozthunter

So its a no go then am assuming lol

Another dumb question coming. Which EWG connector do I order?

The B series one

It might be listed as B58 but it works on b48/b46 too

KnifeEdge87 · 01-01-2021, 08:44 PM

Quote:

Originally Posted by KnifeEdge87

The B series one

It might be listed as B58 but it works on b48/b46 too

Ask vipin for deets

VipinLJ · 01-01-2021, 10:12 PM

Quote:

Originally Posted by KnifeEdge87

The B series one

It might be listed as B58 but it works on b48/b46 too

Correcto.

https://burgertuning.com/products/n5...arness-adapter

From the drop down menu, choose the one for the B58.

Ghozthunter · 01-01-2021, 10:16 PM

Quote:

Originally Posted by VipinLJ

Correcto.

https://burgertuning.com/products/n5...arness-adapter

From the drop down menu, choose the one for the B58.

Much appreciated. Placed the order just now.

VipinLJ · 01-01-2021, 11:15 PM

Quote:

Originally Posted by Ghozthunter

Much appreciated. Placed the order just now.

You're welcome. The most difficult part for me was installing it in the JB4! I couldn't get the plastic box to close after. Had to tape it up temporarily and got the metal case instead :D

KnifeEdge87 · 01-04-2021, 01:31 AM

Map3 might be a bit too much for the the gas you're using

you have 0 timing advance for a very very long time

If you can get some E85 where you live put some in to get like E30 mix (30% E85, 70% 93AKI)

also

Are you sure you removed the BM3 tune ? It looks like it still might be there. I don't ever remember seeing vipinlj's car (also a B46 330i) having the DME command 20+psi before.

KnifeEdge87 · 01-04-2021, 01:50 AM

ok sorry i confused you for someone else but couple things

1) going forward do not combine logs and try to make sure each file is one particular run (turn off combine logs), don't manually start the logging, just let the automatic logging (based on pedal position) do it's job (have the log trigger threshold as like 50-60% pedal)

2) go back to map 0 for now, did you buy your car new or 2nd hand? your dme boost target is quite high (your "R4" log) at like 20+psi, that's way higher than any B46 or B48 I've seen. If you bought your car used you could already have a tune on the car.

Ghozthunter · 01-13-2021, 05:19 AM

Quote:

Originally Posted by KnifeEdge87

ok sorry i confused you for someone else but couple things

1) going forward do not combine logs and try to make sure each file is one particular run (turn off combine logs), don't manually start the logging, just let the automatic logging (based on pedal position) do it's job (have the log trigger threshold as like 50-60% pedal)

2) go back to map 0 for now, did you buy your car new or 2nd hand? your dme boost target is quite high (your "R4" log) at like 20+psi, that's way higher than any B46 or B48 I've seen. If you bought your car used you could already have a tune on the car.

Was this message meant for me or someone else? Lol
If its for me to answer your question, the car was a demo car and had 2300 miles in it. So technically new I guess.

I received the ewg connector so ill get another log and change the settings like you mentioned. Thank you.

Ghozthunter · 01-13-2021, 05:55 PM

Uploading new log for review using ewg connector. Thank you for the help.

KnifeEdge87 · 01-13-2021, 10:23 PM

Yes it was meant for you

I'm not sure if you have a particularly hot example of the b46 but your ecu is commanding much higher boost pressures than other B series engines I've seen

The boost curve is also extremely biased towards the low end. It doesn't look "normal"

If you bought it as a demo (showroom) car it probably doesn't have a tune in it but there's definitely something weird going on.

Its definitely worth investigating but no matter what, just move on back to map 0 and log first. We can work on putting your map 6 together from what we see there.

Ghozthunter · 01-13-2021, 10:29 PM

Quote:

Originally Posted by KnifeEdge87

Yes it was meant for you

I'm not sure if you have a particularly hot example of the b46 but your ecu is commanding much higher boost pressures than other B series engines I've seen

The boost curve is also extremely biased towards the low end. It doesn't look "normal"

If you bought it as a demo (showroom) car it probably doesn't have a tune in it but there's definitely something weird going on.

Its definitely worth investigating but no matter what, just move on back to map 0 and log first. We can work on putting your map 6 together from what we see there.

Got it, ill do a map 0 run in the morning.
Thank you.

Ghozthunter · 01-14-2021, 09:23 AM

New log using map 0 attached. Thank you very much for the help.

KnifeEdge87 · 01-14-2021, 05:12 PM

Why do you keep stopping at 5500rpm

You have another 1000rpm till redline

KnifeEdge87 · 01-14-2021, 05:42 PM

Your throttle never fully opens up throughout the entire run

You're boosting above dmebt but I assume that is because you still have your EWG wire on and the jb4 is doing something funky there

I suggest we move onto a really low absolute target just to make sure you're engine is "healthy" and the throttle is capable of opening up before we start to try and ramp things up.

Your engine is also only at the minimum temps for what one would call "warmed up"

Is it absolutely freezing where you are?

Try and wait until your engine oil and water temps are at 90c (195f) or higher before making your pulls

Just drive around a bit longer, you really should refrain from stressing your engine until operating temps are reached, it's extremely bad for the components.

Go to settings /view jb4.... /user adjustment

In the boost column put 12 across the board, 0 for fuel bias and 50 for duty bias

Save it (you should be connected to the car if I recall correctly)

Wait for the car to warm up and run another log starting from about 2200rpm in 3rd gear (keep the pedal at max but without activating the switch at the end that makes it downshift, until the car shifts into 4th on its own)

Do two map 0 runs and two map 6 runs

Be safe, either find a sparsely used road or do highway pulls in early morning /late night

Obviously do it on an straight a road as possible

What we are looking for is 1)your throttle smoothly and fully opening as rpm increases 2)your timing to climb smoothly from the beginning of your run until the end reaching atleast the double digits

It goes without saying use good gas, please let us know what the best gas you have available that you will reliably be able to access.... Even if 100+ octane race gas is available next door, if it is so expensive you will never buy it on your regular fillups, it's not something you want to tune with.

I'm hoping you're throttle problem is because either the engine isn't warmed up or you have an EWG that is acting funny because the dmebt curve drops so sharply. That's why I'm asking for a low boost map 6.

Ghozthunter · 01-14-2021, 06:18 PM

Ok going for a drive and then provide new logs shortly.

Ghozthunter · 01-14-2021, 06:46 PM

New logs attached