JB4 newbie

[Anicete21]

Hey everybody, apologies if this is a repost. I couldn't find exactly what I was looking for.

I'm brand new to my 2023 Stinger GT2. After some research and excitement I of course, purchased the HKS plugs (gapped at .022 to the best of my ability), the ARK downpipes, MBRP exhaust, MBRP resonators (yet to be installed (recommended?)) and of course, the JB4.

With that being said. I installed the plugs and JB4 myself. Went pretty smooth. Connected it and fired it up. Warmed the car up a bit and started with Map 0 then to Map 2. I am running 93 from Shell. I played around with the data logging and have been researching it to the best of my ability to understand how to. From what I've seen, my numbers don't seem too off but a concern of mine is ign_1 is all over the graph, is that normal? Most of the time ign_2-6 are reading 0.0 and sometimes 0.8 but here and there I've seen mainly ign_4 go to 3.0-3.8 and even one point all of ign_2-6 go to 3.8.

If there is a "how to" or "reading jb4 logs for dummies" I would really appreciate it. I'm really just looking for "safe" parameters.

I'm just nervous about causing damage to my vehicle.

Apologies again if this is a repost or if I sound completely ridiculous. Again, I am new.

If there is anything I need to share or post or anything please let me know what you'll need!

 

[Kamauxx]

Terry has his own forum for all things JB4. If you're into information overload go directly there! They also quickly respond to questions and help you out if you post the logs.

For your specific question, check out the below post.


"Ign1-6: Timing advance in the specific cylinder. Generally all cylinders will agree but as you start to approach a limit of Boost for a given fuel quality/octane level then you’ll start to see 3.5 degree timing drops in specific cylinders. The lower the grade fuel the more frequently you’ll see drops. If you see drops in the same cylinder repeating several times in a single gear then it’s usually an indicator that you’d be better off with a lower Target for the given fuel. Note that timing in all cylinders regularly drops negative during shifts and under some other driving conditions so do not confused mapped changes affecting all cylinders with cylinder specific timing drops when evaluating logs. Also note cyl1 is sampled via OBDII while cyl2-6 are sampled via RAM read so there will be some timing differences between the readings due to the different protocols. Cyl 2-6 are not available for all vehicle models. Note with firmware v20+ values 2-6 reflect timing drops rather than raw timing advance per cylinder. Set FUA = 1 to revert back to raw timing if needed. In the new format this shows how many degrees were removed from that specific cylinder. Also note it's normal to see timing drops. If you're trying to tune for zero drops then you'll end up leaving a lot of power on the table."

JB4 Logging Parameters - JB4tech.com - International Turbo Tuning Discussion

Hey guys, We’ll use this thread for details and discussions on Kia specific JB4 logging parameters. Fuel trims and wideband o2 sensor control explained here...

www.jb4tech.com

 

[Yves998]

Just unplug the ecu and try map1 again. It doesn't matter how people online says they're able to run which map with which fuel. A Texan car able to run map3 with Texan 93 wouldn't stop a Californian car knocked to death with ACN91.