3.3TT JB4 Fuel (RON/ROZ) and logs

[Dubso]

Hello all,

Question about fuel and logs.

I have a '21 3.3l Stinger GT awd (Euro Spec) with the 450whp jb4 kit to include the silicone inlets (denso plugs gapped)
I am currently in Germany and have following fuels available:
98 RON (up to 5% Ethanol)
95 RON (up to 5% Ethanol)
95 RON E10 (up to 10% Ethanol)

I think euro 98 should be equivalent to US 93 Oct.

I am running map 3 that that I think looks ok, but would appreciate a look over by someone more experienced. Map 0 log attached for reference.

I am scheduled to go get dynoed soon and hopefully that will give more info.

Not sure if a octane booster would help?

Thanks

 

[MetalMania80]

No logs are attached.
Our Europ 98 is like US 95, 95 like US 91.
Some gas stations in Germany should have about 100-102.
I live in Poland and don't have access to E85, the best fuel is Shell V-Power 100 (so gives around US 95). I mix it with chemical alcohol. That gives me about E22 with 98 US octan.

 

[Dubso]

Here the logs...

 

[MetalMania80]

Do you have some ECU tune, like BEF? I don't know what happens with your ignition and throttle, it's being shut down with a full pedal.

Map0 ign4 corrections up to 5.3, too much, this same map3.

Try to do logs starting 3rd gear at 2k rpm to red, and some beginning of 4th.

You need TCU tune too, shifts are too late.

 

[Dubso]

Thanks. No other tunes than the 450whp kit from burger. No bef or tcu.

The car runs fine. Pulls subjectively harder in map3 than 0. No loss in power. Pulls performed in sport mode if that matters

How would I go about resolving the ign4 corrections?

I will try to run more logs this weekend.

 

[MetalMania80]

Timing corrections are related to fuel/ spark plugs. Now I see that you have this same up to 5.3 on map0. Check sparks/gaps; try to reset adaptives by disconnecting the battery for 5-10 minutes or with Ek1 if you have one.

 

[Dubso]

Ok, now that you mention it… I never did disconnect the battery. I will do that, then run the logs again.

I was also thinking I jacked up the denso’s when gapping them…

We will see hopefully

 

[Dubso]

Here some more logs. Map0 and 3. I did a bunch of pulls on map3 but for some reason it didn't save and create a log file, but i did a few more, hopefully that worked. I did also disconnect the battery for 30min to see if that makes a difference.

 

[MetalMania80]

It doesn't look good, but I forgot to tell you that you need to do 50-100km of normal driving for the new adaptation.

 

[Dubso]

Doesn't look good as in remove the jb4 all toghetger, take in for a service or what?
I have in the meantime Sent the original logs to Terry to look them over. He said "looks ok, do map3 if that's faster than map0". As a log reading illiterate, I'm super confused now.

 

[Thomby]

Doesn't look good as in remove the jb4 all toghetger, take in for a service or what?

The 3.8s and 5.3s in Ign2-5 which indicate cylinders pulling timing that amount, likely due to knock. However, it looks like you're manually logging as the files are like 5000 rows of mostly off-throttle cruising with a couple bursts of throttle. We need to see WOT through a couple of gears, so just floor it from 20-30mph up to 75-85mph without lifting, and let the JB4 auto-log (should trigger at like 80% throttle by default) so you don't have all the off-throttle filler.

Here's a writeup I did on reading logs, with example values and links to BMS' own explanation:

T

Post in thread 'Wondering if anyone could let me know if I am running at a safe level I have no idea. What my air fuel ratio should be. Please help someone.'

Mar 21, 2023

I’ve had my JB4 for a while now just installing it what a difference it makes I’m only a little concerned that I am not really able to read the logs do you know if I am running in a safe range love how fast it is but I really don’t want to hurt my car

I'm still an amateur at this, but here's BMS's guide, and how I'm learning to look at these:

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

I start by looking at Pedal, Gear, and MPH (light orange) to get my bearings...

• Thomby

• 

 

[MetalMania80]

I wouldn't be happy seeing things like that in my logs...

 

[Dubso]

Yeah, i got it. But what's the fix? I will drive the 50-100km "normal" to see if that does anything. Or should i not drive at all with what you are seeing? Next would be plugs? Fuel is from ESSO/EXON, so i don't think it's that

 

[Thomby]

But what's the fix? Or should i not drive at all with what you are seeing?

You're fine driving around like normal. The octane limitation, knock, and timing pulls are going to be under high load: high throttle, boost, rpm, and timing. And the fix is to increase your octane.

But what I would do first is pull a decent log on Map 0 as a baseline, then Map 1 and Map 2. This will let you see where you have clean runs and where you start to hit the limits of your fuel.

 

[MetalMania80]

Don't panic, I wouldn't blow your engine immediately

I will tell you, how I do it. Put on JB4 app pedal, Ign1-6. Observe Ign2-6. In the beginning, after you reset timing adjustments you will see after low load (pedal 20-40%) values like 0,8-1,5 and when the pedal is 60-80% 1,5-2,3. After some driving and pulls they will go down, to zero. Sometimes you will see one ign value higher than others. When you stop seeing the same corrections on Ign2-6 you are ready to go. You can do it on map0 or map1-2, not higher- we don't know what is going on.

Then you can make a log. Make the engine hot, make 3-4 short runs with 80-100% of a pedal, delete log and make a proper one. Autologin 90%, start 2nd gear at 3-4k rpm, auto shifts, WOT to 140-150 km/h. In one log you can do different maps, like 0,2 and 3.

 

[MetalMania80]

PS: map 0 and 3 show the same correction on cylinder 4. It's not hard to reach them, you can check the spark plug and gapping, and maybe switch the coil with cylinder 2.

 

[Volfy]

Hello all,

Question about fuel and logs.

I have a '21 3.3l Stinger GT awd (Euro Spec) with the 450whp jb4 kit to include the silicone inlets (denso plugs gapped)
I am currently in Germany and have following fuels available:
98 RON (up to 5% Ethanol)
95 RON (up to 5% Ethanol)
95 RON E10 (up to 10% Ethanol)

I think euro 98 should be equivalent to US 93 Oct.

Correct.

87 AKI = 91 RON
91 AKI = 93 RON
93 AKI = 98 RON

US gasoline stations displays AKI, which is the average between RON and MON.

 

[Dubso]

Thanks for confirming that

 

[Dubso]

PS: map 0 and 3 show the same correction on cylinder 4. It's not hard to reach them, you can check the spark plug and gapping, and maybe switch the coil with cylinder 2.

Ok, I'll check the plugs and swap the coil of cyl 2 and 4.
To confirm, 2 is closest to radiator driver side, 4 is middle driver side

Here some baseline logs prior to swapping coils and checking plugs. Map0-2

 

[MetalMania80]

2 is closest to radiator driver side, 4 is middle driver side- YES