Diggs24
Autocross Champion
- Location
- de plains! de plains!
- Car(s)
- 2015 GTI
Very odd. Has the firmware been updated since you bought it from me? Does it do this high trims and high timing advance way too early in the rpm often?
7
JB4 Logging, stacking and Map 6 Discussion
- Thread starter George Smooth
- Start date
Very odd. Has the firmware been updated since you bought it from me? Does it do this high trims and high timing advance way too early in the rpm often?
bubbadubba
New member
- Location
- Upstate NY
- Car(s)
- 2015 Audi A3 2.0T Qu
Diggs24
Autocross Champion
- Location
- de plains! de plains!
- Car(s)
- 2015 GTI
Yes. Doesn't look bad. It degrades quickly. You could try using the overboost function and see if it helps. Set it to 80.
https://datazap.me/u/bubbadubba/log-1539623083?log=0&data=1-3-21
It's that touch too much boost causing it.
bubbadubba
New member
- Location
- Upstate NY
- Car(s)
- 2015 Audi A3 2.0T Qu
What is the overboost function?
Diggs24
Autocross Champion
- Location
- de plains! de plains!
- Car(s)
- 2015 GTI
It's should be called autoshift reduction or similar. From your csv....
AutoShiftRed
0
Try 80.
bubbadubba
New member
- Location
- Upstate NY
- Car(s)
- 2015 Audi A3 2.0T Qu
Ok Thanks. I just read a little bit about this and it makes more sense to me.
roystr
Ready to race!
- Location
- California
Looking to stack JB4 with Unitronic Stage 2. I assume I should start with map 4 and get some logs of the baseline tune? I'm running E25 (91 octane + 2.5 gallons of E85).
If everything is clean, how much additional boost should I start with? I feel like it needs it down low more than up top.
Thx
If everything is clean, how much additional boost should I start with? I feel like it needs it down low more than up top.
Thx
Diggs24
Autocross Champion
- Location
- de plains! de plains!
- Car(s)
- 2015 GTI
Nah. You're only down there once.
Map 6
4000 1
4500 2
5000 3
5500 2
6000 2
6500 1
Boost Safety 27
FOL=10
Fuel bias all 0
roystr
Ready to race!
- Location
- California
Thanks, Diggs!
Diggs24
Autocross Champion
- Location
- de plains! de plains!
- Car(s)
- 2015 GTI
It limits boost at the shift. JB4 tends to overshoot target.
bubbadubba
New member
- Location
- Upstate NY
- Car(s)
- 2015 Audi A3 2.0T Qu
It reduces boost at 3rd-4th, 4th-5th, and 5th-6th shift points to help prevent over boost with automatic transmissions. Someone more knowledgeable may be able to provide more detail.
I have the 220hp, is20 turbo. CHHA, how do you mean crazy? I thought 22-23 psi was well within the range of the is20. I don't think it stays there very long.
Right now it’s running 60/5//5 so I’m not sure it has been updated. I have newer firmware downloaded just need to flash the JB4. This is the first time I’ve seen the timing advance so early and the trims get high. Previously when I lived in SoCal I ran ~E25-E30 (91 mix) and FOL 60 and my all my logs were solid, see the example below:
https://datazap.me/u/dood/6-16-18map1e25t70?log=0&data=1-4-11-14-18-25-26-27-28
I wonder if the lower ambient temps are a factor. I know lower IAT means more timing. Ultimately before I romp on it more I’m going to update the firmware and get another log but on Map 1 this time.
Sent from my iPhone using Tapatalk
Diggs24
Autocross Champion
- Location
- de plains! de plains!
- Car(s)
- 2015 GTI
The stock tune doesn't advance before 4700/4800ish. I've had an odd log before where timing went weird, but car drove fine. Update the firmware and see if it continues.
I never saw a log from a is20 which ECU requests 18.5 psi at around 4500 rpm.
For example my ECU requests at nearly equal IAT's about 13-14 psi.
I see mine making 18.5 psi (and a little above) at 3-3500 rpm. It is not unusual to have this amount of boost in the rpm range of 3000-3500 but at much higher IAT / ampiant temps... Seems like Audi has a different software?