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BMS JB4 R specific thread

Diggs24

Diggs24

Autocross Champion
Location
de plains! de plains!
Car(s)
2015 GTI
TAZZ said:
Hey all,
I'm currently running DM stage 2 software on 98RON pump gas, with a JB4 stack on map 6 (additive not absolute target). George has helped dial-in the settings nicely. Boost is hitting 25psi, timing climbs up to 15-16, afr looks spot on and fuel trims are in check. I have some minor timing pull but all kept under -2. The car is running really great.

I am not running the afr wire tap as my understanding is that it's not needed for a stack over tune, I am not sure though? Any thoughts on that from the experts would be appreciated!
Thx!
Click to expand...

If George says you don't need it then you don't. Looks good.
 
B

B95zP

Ready to race!
Location
AZ
Installed the JB4 w/ BT on the 2018 R today, other mods include a CTS TIP and APR intake. Decided to try my hand at logs, however I didn't read up though on what the best method is, just went from a standstill up through to 4th.

There were a few runs where I swear I felt a pulse in/surge in boost, and overall it didn't feel as strong as I was expecting. The JB4 was previously on my GTI, and was experiencing some errors which George believes were most likely related to Plug D. As far as I could tell Plug D looks OK.


https://datazap.me/u/dcourt/log-1526785557?log=1&data=1-4
https://datazap.me/u/dcourt/log-1526785557?log=2&data=1-4
https://datazap.me/u/dcourt/log-1526785557?log=0&data=1-4
https://datazap.me/u/dcourt/log-1526786809?log=1&data=1-4

Could we maybe update the 2nd post by George to include directions on what the best method for logging is?
 
Last edited:
Diggs24

Diggs24

Autocross Champion
Location
de plains! de plains!
Car(s)
2015 GTI
B95zP said:
Installed the JB4 w/ BT on the 2018 R today, and decided to try my hand at logs. Didn't read up though on what the best method is, just went from a standstill up through to 4th.

There were a few runs where I swear I felt a pulse in/surge in boost. Overall it didn't feel as strong as I was expecting. Other mods include a CTS TIP and APR intake. I did 6-8 runs, but seems Datazap only lets you upload 3.

https://datazap.me/u/dcourt/log-1526785557?log=1&data=1-4
https://datazap.me/u/dcourt/log-1526785557?log=2&data=1-4
https://datazap.me/u/dcourt/log-1526785557?log=0&data=1-4

Could we maybe update the 2nd post by George to include directions on what the best method for logging is?
Click to expand...

3rd gear 3k-6500. get a little into 4th if you can.

I can tel you right now this is way too high. You need an intercooler STAT.

https://datazap.me/u/dcourt/log-1526785557?log=1&data=1-4-6-11-19-25-26-27
 
M

MadMen

Ready to race!
Location
Mooresville, NC
The surging is probably the timing being pulled....
 
B

B95zP

Ready to race!
Location
AZ
T

tsivas27

Let's Go Blackhawks!
Location
New York
Last edited:
Diggs24

Diggs24

Autocross Champion
Location
de plains! de plains!
Car(s)
2015 GTI
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