[Bash]

I think 50% of people using JB4 have meth.
But for the people who run on pump using JB4, have you ever logged your car, would love to see some logs up in here on different octane.
Please include RPM, IGN adv, Boost, PWM, IATs, throttle.. with a list of your mods if any. and of course the octane rating.

This would be really interesting in seeing how different cars react to geographical locations/octane/temps on similar platform.

BTW, if you are running with a CPS unit kindly add that to the log/graph.

[Bash]

to jump start this thread, heres a look at one of my old logs, notice the timing drops everywhere....
Mods were, free flowing DPs/midpipes, drop-in filter, Jb4 map 1.

[Bash]

lol no one is even interested

[Clap135]

You know what would be even funnier about that log, if you had the capabilities to log ignition and correction accross all cylinders. You think that looks bad, you are not seeing the whole picture as cylinder 1 is the "happiest" of the 6

[Bash]

lol comforting. Clap do you think this is normal to see with Euro 98 ron gas on map 1?
After seeing this log, how would you think that kind of fuel would perform on cobb stage 2 91 octane maps?

[enrita]

Originally Posted by Bash

lol comforting. Clap do you think this is normal to see with Euro 98 ron gas on map 1?
After seeing this log, how would you think that kind of fuel would perform on cobb stage 2 91 octane maps?

your issue is not the 98 fuel but too much boost/ignition advance and probably heat (IAT). You wont have this issues with Cobb stage 2 FBO and their 93 octane map.
You live in a very hot country. Get an FMIC !

[Clap135]

Sadly logging 1 cyclinder doesnt tell you a whole lot. However when the happiest cylinder shows multiple timing drops in one gear, you need to look into running higher octane, less boost, or figuring out a way to actually control timing. As far as stage 2 91 octance maps, they will be mapped for that just. I am not sure what Euro 98 is in terms of american octane ratings.

[enrita]

Originally Posted by Clap135

Sadly logging 1 cyclinder doesnt tell you a whole lot. However when the happiest cylinder shows multiple timing drops in one gear, you need to look into running higher octane, less boost, or figuring out a way to actually control timing. As far as stage 2 91 octance maps, they will be mapped for that just. I am not sure what Euro 98 is in terms of american octane ratings.

93

[M3 Eater]

HMM. strange. IAT doesn't seem out of check for the boost that is being run. NOT logged was the humidity during this run. I would like to see an early morning run, mid day, and a dusk run. Just post on the side the relative humidity when you log the runs. Most of us running meth and fmic upgrades stopped worrying about the ambient temp when we do logs. Everyone knows, the lower the temp and humidity, the better the timing will look on a log. Personally, That looks like DTC hiccups to me. Was DTC on during this log?

[Bash]

No DTC those are definitely timing drops, although I believe our 98 is not as good as it should be but nonetheless this is awful

[Mike@N54Tuning.com]

I've seen your posts on n54. As they said your "98 octane" in Beirut is acting more like 90 octane. You get lots of timing drops at only 10psi. So they sent you an early CPS module to test out and I guess it turned out to be defective. In your situation on very bad fuel the CPS would smooth the timing curve but that won't make your car any faster. You really need to up the octane to support more power.

Anyway here are a couple customer logs I had sitting on my PC from the CPS module, one with 91 octane and another with 93 octane.

Mike

[Joshboody]

Originally Posted by M3 Eater

HMM. strange. IAT doesn't seem out of check for the boost that is being run. NOT logged was the humidity during this run. I would like to see an early morning run, mid day, and a dusk run. Just post on the side the relative humidity when you log the runs. Most of us running meth and fmic upgrades stopped worrying about the ambient temp when we do logs. Everyone knows, the lower the temp and humidity, the better the timing will look on a log. Personally, That looks like DTC hiccups to me. Was DTC on during this log?

FYI: Humidity will help in suppressing potential detonation.

[themyst]

Originally Posted by Mike@N54Tuning.com

I've seen your posts on n54. As they said your "98 octane" in Beirut is acting more like 90 octane. You get lots of timing drops at only 10psi. So they sent you an early CPS module to test out and I guess it turned out to be defective. In your situation on very bad fuel the CPS would smooth the timing curve but that won't make your car any faster. You really need to up the octane to support more power.

Anyway here are a couple customer logs I had sitting on my PC from the CPS module, one with 91 octane and another with 93 octane.

Mike

Am I crazy, or IAT is not creeping up at all on that 93+CPS log? Meth maybe?

[enrita]

Originally Posted by themyst

Am I crazy, or IAT is not creeping up at all on that 93+CPS log? Meth maybe?

yep seems so... good catch.

[Mike@N54Tuning.com]

Originally Posted by themyst

Am I crazy, or IAT is not creeping up at all on that 93+CPS log? Meth maybe?

My notes on it say it is a tune / DCI only car with no meth on pump 93 octane. He used the CPS module to run map 2 instead of map 1. By locking out 4-5 degrees of advance he found it not any faster at the higher boost level but it does makes for a pretty chart.

Mike

[Mike@N54Tuning.com]

Originally Posted by Bash

to jump start this thread, heres a look at one of my old logs, notice the timing drops everywhere....
Mods were, free flowing DPs/midpipes, drop-in filter, Jb4 map 1.

FWIW I sent an email over to BMS to ask why they were not able to improve the tuning for you. Here is the reply:

"Yes that is Bashir's car. I've worked with him a lot via email. He's from Lebanon. From the get go he was getting repeated timing drops at even the 10psi map 5 minimum settings so I compared his logs with others and came to the conclusion that his fuel there was somewhere around 90 octane. I sent him one of the first CPS modules to test but unfortunately there was some problem with it, it would randomly throw VANOS codes on him. Probably a bad component the CPS board. Codes aside the CPS did work and we saw lots of improvement in his advance curve. This was the last log I got from him. I suggested we get him a working CPS module that doesn't throw those VANOS faults at minimum but ideally to make more power on that fuel he needs a methanol kit."

Mike

[themyst]

Originally Posted by Mike@N54Tuning.com

My notes on it say it is a tune / DCI only car with no meth on pump 93 octane. He used the CPS module to run map 2 instead of map 1. By locking out 4-5 degrees of advance he found it not any faster at the higher boost level but it does makes for a pretty chart.

Mike

Maybe I am not understanding how to read CPS on that log, but it indicates maxed timing with a CPS figure of some sort that I can't read. Still doesn't explain how iat is flatlined through the entire log. If he has some sort of magical intercooler I want to know where to score one!

[Joshboody]

Originally Posted by themyst

Maybe I am not understanding how to read CPS on that log, but it indicates maxed timing with a CPS figure of some sort that I can't read. Still doesn't explain how iat is flatlined through the entire log. If he has some sort of magical intercooler I want to know where to score one!

you subtract cps from timing I believe.

For IAT, the JB logs are tough to decipher for me. It is rising but very minimally... seems like the scaling is off. Is that really around 10, 15 degC for IAT?

[Mike@N54Tuning.com]

Originally Posted by themyst

Maybe I am not understanding how to read CPS on that log, but it indicates maxed timing with a CPS figure of some sort that I can't read. Still doesn't explain how iat is flatlined through the entire log. If he has some sort of magical intercooler I want to know where to score one!

On his IAT it's possible my notes on this folder are wrong and he actually has an intercooler. Hard to tell after the fact. I do have some other logs from the same car as he was dialing it in and testing different settings. For the CPS the curve shown is the amount of negative offset applied. You should subtract that from DME advance get the actual cylinder 1 advance. The CPS is applied globally across all cylinders. BMS does put in global offsets that come in and go out quickly based only on cylinder 1 information as I've seen done by others. They also don't do "hidden" offsets. Whatever is offset is shown in the CPS trace on the log.

Mike

[FirstBMWLA]

Forgive my ignorance, so the CPS essentially limits max advance? So if by default the car wished to run 10deg and you applied 4deg offset it would be at 6deg max when the DME thinks it's maxed?
I guess this is beneficial because the DME wouldnt be going through iterations of trying to increase advance only to have to lower it again?
Is that roughly correct??

[Bash]

Originally Posted by Mike@N54Tuning.com

FWIW I sent an email over to BMS to ask why they were not able to improve the tuning for you. Here is the reply:

"Yes that is Bashir's car. I've worked with him a lot via email. He's from Lebanon. From the get go he was getting repeated timing drops at even the 10psi map 5 minimum settings so I compared his logs with others and came to the conclusion that his fuel there was somewhere around 90 octane. I sent him one of the first CPS modules to test but unfortunately there was some problem with it, it would randomly throw VANOS codes on him. Probably a bad component the CPS board. Codes aside the CPS did work and we saw lots of improvement in his advance curve. This was the last log I got from him. I suggested we get him a working CPS module that doesn't throw those VANOS faults at minimum but ideally to make more power on that fuel he needs a methanol kit."

Mike

No disrespect or anything but the JB4 is not for me. I had to pay over 500$ to get it here and paid around 50$(ship+duties+tax) to get the faulty CPS here, im not about to pay another 85+50 to make this tune work. And im certainly not running meth as this is my DD and i dont want to drive worried all the time even with FSB, failsafes etcc. For the record my so called 90 octane as you stated is actually not that bad, my friend runs a flash tune 14-15 psi with clean logs.
Long story short, if you want to run the JB cleanly even your "clean" 93 octane wouldnt let it run properly thats why i started this thread anyway, to see if anyone is running the JB without meth and cps and has clean logs on map 2 heck map 1, you'd either need CPS or METH.

For the record this log you posted is in fact mine, the runs were not all as such, on that same log the run prior to that had timing drops.

And finally the Vanos code was thrown once, all the other dangerous limps on highways were from camshaft inlet/outlet and some crankshaft too.

FWIW i still think JB4 is the better when using Meth/Nos/race gas at the moment, plus all the features and good customer service.

[marconi118]

I see you have a 07 E92

I have the same 07 E92 with JB4 and have the same timing droppings, use 98 european premium gasoline (93 US equivalent)


I assume that this is caused by the fact that our 07 E92 are running on original DME program (prior 29.2) that has more aggressive advance tables.

Could you go to the dealer and read your key, to see if you are on the original DME version, or if flashed to what version?

Your friend with a flash has different advance tables for sure!