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JB4 Logging, stacking and Map 6 Discussion

ChrisMk77

ChrisMk77

Autocross Champion
Location
Sweden
Car(s)
2018 GTI Performance
MillaTyme said:
Thanks guys!

Here's two logs on I did once it cooled down. Map 2, 91oct, 5400ft altitude. My AFR's seem to be a little rich? You guys notice anything to tweak for Map 6?

https://datazap.me/u/millatyme/log-1596396258?log=0&data=1-4-9-11-18
https://datazap.me/u/millatyme/log-1596396258?log=1&data=1-4-9-11-18
Click to expand...
Looks ok, ECU is not letting the engine make much power in the first log. Try a log in 4th with your shorter gearing for more load, and you should consider running E-blend for a stronger map6.

@shovelhd Golf r adjusts throttle to control torque, look at pedal.
 
ChrisMk77

ChrisMk77

Autocross Champion
Location
Sweden
Car(s)
2018 GTI Performance
Doge said:
Thanks for the quick response! I've been mixing Chevron, Shell, and 76, but I guess I'll have to drop Chevron from that list.
I haven't done any E85 mix before so before doing some research I thought I'd increase the gas quality by putting in some 100 oct racing fuel (~4.8 gallons).

Here are a few pulls with 100mix @ Map 2:
https://datazap.me/u/davidhahn/log-1596421341?log=0&data=1-4-11-25-26-27
https://datazap.me/u/davidhahn/log-1596405078?log=0&data=1-4

This is Map 1 logging pre-100 mix
https://datazap.me/u/davidhahn/log-1596404890?log=0&data=1-4

EDIT:
My logs seem to be all over the place... I'll try to do a clean pull later today.
Click to expand...
Looks better but IATs is killing timing advance and it got pretty rich with the race fuel blend, trims got fairly low to and it must be costly so just blend with E85.
 
D

Doge

Go Kart Newbie
Location
MI
Car(s)
2016 GTI
ChrisMk77 said:
Looks better but IATs is killing timing advance and it got pretty rich with the race fuel blend, trims got fairly low to and it must be costly so just blend with E85.
Click to expand...

Thanks -- as always, really appreciate your response! I have BMS intercooler that's going to be installed soon so hopefully that'll help.

Yeah I can't keep pouring money into 100 oct fuel so I'll definitely do some research around my area for E85. I'll just run my tank empty, start fresh, and go from there.
For the current tank, since it's running rich, should I be pulling back on the fuel bias? or FOL? And would that be the case for E85 as well? Sorry in advance if these are stupid questions -- pretty new to this :D
 
D

Doge

Go Kart Newbie
Location
MI
Car(s)
2016 GTI
Diggs24 said:
No. It's running rich because IATs. Get IATs down.
Click to expand...
Thanks for chiming in! I went back and looked but my IAT seems way too high even for stock IC... I was cursing for a good time and I remember the ambient temp being high 70’s...

I’ll log again after the new IC is installed
 
shortyb

shortyb

Autocross Newbie
Location
Upstate SC
Car(s)
Felon Taxi,Dad Wagon
Listen to the professor.
1596538132000.png
 
A

acorazza

Go Kart Newbie
Location
NYC
Car(s)
2018 GTI 6MT
Recently started blending Ethanol to combat this summer heat. Everything I've read said to up FOL to 60 on E but I felt like I was getting some weird AFR readings so I backed it down to 55. I think the trims look good but AFR seems a little lean to me. Nothing crazy and I know the JB4 can only do so much in regards to the ECU targets but always can use another opinion. How does everything look? Should I go back to 60?

E27 3rd gear 4K-6K
https://datazap.me/u/acorazza/e27-3rd-4k-6k-dp-fmic-map-3?log=0&data=1-4-14-18

E27 2nd Gear
https://datazap.me/u/acorazza/e27-2nd-gear-dp-fmic-map-3?log=0&data=1-4

E22 full pull
https://datazap.me/u/acorazza/bear-mtn-return?log=0&data=1-4

A 93 pull (no ethanol) from April. The temps were cooler and FOL was 50
https://datazap.me/u/acorazza/25k-65k-3rd-gear-ambient-55?log=0&data=1-4-6-14-18-25-26-27-28
 
Z

ZuMBLe

Autocross Champion
Location
NY
Car(s)
Alltrack 6MT
acorazza said:
Recently started blending Ethanol to combat this summer heat. Everything I've read said to up FOL to 60 on E but I felt like I was getting some weird AFR readings so I backed it down to 55. I think the trims look good but AFR seems a little lean to me. Nothing crazy and I know the JB4 can only do so much in regards to the ECU targets but always can use another opinion. How does everything look? Should I go back to 60?

E27 3rd gear 4K-6K
https://datazap.me/u/acorazza/e27-3rd-4k-6k-dp-fmic-map-3?log=0&data=1-4-14-18

E27 2nd Gear
https://datazap.me/u/acorazza/e27-2nd-gear-dp-fmic-map-3?log=0&data=1-4

E22 full pull
https://datazap.me/u/acorazza/bear-mtn-return?log=0&data=1-4

A 93 pull (no ethanol) from April. The temps were cooler and FOL was 50
https://datazap.me/u/acorazza/25k-65k-3rd-gear-ambient-55?log=0&data=1-4-6-14-18-25-26-27-28
Click to expand...

Your trims look fine so I wouldn't worry about the AFRs. They don't look dangerously high. The ECU is doing what the ECU wants to do in terms of fuel. One of your E27 logs shows AFRs in the 11s, so your ECU is able to do it if it wants to.
 
shortyb

shortyb

Autocross Newbie
Location
Upstate SC
Car(s)
Felon Taxi,Dad Wagon
Check to make sure all your fuel bias is set to 100. Also, when you log, put your pedal all the way down and keep it there. Log 3rd gear from 2500 all the way to 6500 and shift, then keep the pedal down and log into 4th gear.

Its getting hot, do you have access to E85?
 
scasey

scasey

Passed Driver's Ed
Location
Oregon
Car(s)
2019 GTI
Thanks for the tips. I do not have access to E85. I'll do a better run tomorrow when I have more space to rev it out and I'll set the fuel bias. Appreciate it.

Edit: Checked, all fuel bias is set to 100.
 
Last edited:
Z

ZuMBLe

Autocross Champion
Location
NY
Car(s)
Alltrack 6MT
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