[cola.p]

Originally Posted by 330eJL

Those are good times. That was with the MST intake right? Most say the MST intake do not yeild any performance gains and some
say it does but very minimal. For me, it made my car a tad bit slower lol. But that can be explained by environmental factors not the intake. I didn’t have it on for that long. Do you have any 100-200km/h times?

Yes, with MST Intake

If I have a chance I’ll compare mst and stock intake with dragy. For 100-200, I haven’t tried push WOT from 100-200 but I did 0-200. 100-200 from 0-200 was around 15s because xtraboost can hold only 10s. Let me try and let you know.

[330eJL]

Originally Posted by cola.p

Yes, with MST Intake

If I have a chance I’ll compare mst and stock intake with dragy. For 100-200, I haven’t tried push WOT from 100-200 but I did 0-200. 100-200 from 0-200 was around 15s because xtraboost can hold only 10s. Let me try and let you know.

How long have you been running that map? I think +9psi addidive is high, specially at that mid range of the rpm. I bet you will be as fast if you lower those boost levels by 1.5-2psi but make the boosts peak at around 5k. If you go WOT through the gears, the rpms starts at around 5k. So making the boost peak before 4k is kinda useless. Peaking at +9psi at low rpms might be too aggressive when you push hard from 0 or from a dig, I don’t know if that is safe in a long run.

[cola.p]

Originally Posted by 330eJL

How long have you been running that map? I think +9psi addidive is high, specially at that mid range of the rpm. I bet you will be as fast if you lower those boost levels by 1.5-2psi but make the boosts peak at around 5k. If you go WOT through the gears, the rpms starts at around 5k. So making the boost peak before 4k is kinda useless. Peaking at +9psi at low rpms might be too aggressive when you push hard from 0 or from a dig, I don’t know if that is safe in a long run.

Around 6 months LOL
Lower boost on 4k and higher at 5k is very interesting. Thx for your suggestion. Let me try

[330eJL]

Originally Posted by cola.p

Around 6 months LOL
Lower boost on 4k and higher at 5k is very interesting. Thx for your suggestion. Let me try

No lower your boost from 3k rpms and up to about 1.5 - 2psi lower. But make the peak at 5k rpm. If you want you can copy what I have and see how that goes. But my duty bias is set to 50 which is the default. I’ve actually tried upping the boost at +8.2psi with e30 and it didn’t make any significant improvements in performance. My fuel trims were also maxing out so I scaled it down to what I have. This is the most I will do as far as boost even if I get a flash tune. If anything, I would just get a costom tune just to smoothen everything out and make it more consistent. I find Jb4 is not as consistent.

[cola.p]

Originally Posted by 330eJL

No lower your boost from 3k rpms and up to about 1.5 - 2psi lower. But make the peak at 5k rpm. If you want you can copy what I have and see how that goes. But my duty bias is set to 50 which is the default. I’ve actually tried upping the boost at +8.2psi with e30 and it didn’t make any significant improvements in performance. My fuel trims were also maxing out so I scaled it down to what I have. This is the most I will do as far as boost even if I get a flash tune. If anything, I would just get a costom tune just to smoothen everything out and make it more consistent. I find Jb4 is not as consistent.

Ok got it. let me try your custom map.

[cola.p]

Originally Posted by 330eJL

No lower your boost from 3k rpms and up to about 1.5 - 2psi lower. But make the peak at 5k rpm. If you want you can copy what I have and see how that goes. But my duty bias is set to 50 which is the default. I’ve actually tried upping the boost at +8.2psi with e30 and it didn’t make any significant improvements in performance. My fuel trims were also maxing out so I scaled it down to what I have. This is the most I will do as far as boost even if I get a flash tune. If anything, I would just get a costom tune just to smoothen everything out and make it more consistent. I find Jb4 is not as consistent.

330eJL hello,
have you tried or looked into this “bit2 - Full Time IAT Spoofing”? I saw from this post https://g80.bimmerpost.com/forums/sh....php?t=1962213

[330eJL]

Originally Posted by cola.p

330eJL hello,
have you tried or looked into this “bit2 - Full Time IAT Spoofing”? I saw from this post https://g80.bimmerpost.com/forums/sh....php?t=1962213

i haven’t played with it yet but I revised my map a little bit to get get better boost curve. I will be doing some 1/4 mile runs and 100-200km/h runs this weekend, if weather permits. I try not to make major adjustments on other settings because I am not well versed plus I feel like Jb4 is still limited for the hybrid models or at least with the newer ones. It’s a piggy back so I give the car time to learn and make the adjustments, specially on additive maps. I think if the absolute maps can work with our cars, you will see much more performance gains. It might take a new firmware for that though.

[330eJL]

cola.p I just finished reading the whole thread about IAT spoofing. Seems like it makes sense for car in hotter environment running meth or e85 but I don’t think it is something I will mess with since I live in a cold environment. Plus I don’t like
pushing the car when it is hot outside. It might be useful in certain situations and on occasions but I would not run it on a regular.

[cola.p]

Originally Posted by 330eJL

i haven’t played with it yet but I revised my map a little bit to get get better boost curve. I will be doing some 1/4 mile runs and 100-200km/h runs this weekend, if weather permits. I try not to make major adjustments on other settings because I am not well versed plus I feel like Jb4 is still limited for the hybrid models or at least with the newer ones. It’s a piggy back so I give the car time to learn and make the adjustments, specially on additive maps. I think if the absolute maps can work with our cars, you will see much more performance gains. It might take a new firmware for that though.

330eJL I totally agree with this clause “I feel like Jb4 is still limited for the hybrid models or at least with the newer ones”

I tried absolute maps but it didn’t work. It always not reach (or near) target. Don’t know why. Agree with you that if our car can work, it must be very good.

[cola.p]

Originally Posted by 330eJL

cola.p I just finished reading the whole thread about IAT spoofing. Seems like it makes sense for car in hotter environment running meth or e85 but I don’t think it is something I will mess with since I live in a cold environment. Plus I don’t like
pushing the car when it is hot outside. It might be useful in certain situations and on occasions but I would not run it on a regular.

I live in Bangkok which is very hot. Temp here is around 30-37C (86-99F) and IAT usually around 45-51C (113-124F). Thinking about to try

[330eJL]

Originally Posted by cola.p

I live in Bangkok which is very hot. Temp here is around 30-37C (86-99C) and IAT usually around 45-51C (113-124F). Thinking about to try

Try it and see. I would test it on a conservative map first though like maybe Map2 and compare the results before and after IAT spoofing. Your map6 is very aggressive so I would start with a lower map to be safe.

[cola.p]

Originally Posted by 330eJL

Try it and see. I would test it on a conservative map first though like maybe Map2 and compare the results before and after IAT spoofing. Your map6 is very aggressive so I would start with a lower map to be safe.

330eJL I’ll try in a few days and will show you the result!!

[cola.p]

Originally Posted by 330eJL

i haven’t played with it yet but I revised my map a little bit to get get better boost curve. I will be doing some 1/4 mile runs and 100-200km/h runs this weekend, if weather permits. I try not to make major adjustments on other settings because I am not well versed plus I feel like Jb4 is still limited for the hybrid models or at least with the newer ones. It’s a piggy back so I give the car time to learn and make the adjustments, specially on additive maps. I think if the absolute maps can work with our cars, you will see much more performance gains. It might take a new firmware for that though.

330eJL have you tried 0-200 and what is 100-200 result from that run? I think it should less than 100-200 due to limited time of xtraboost. Mine 100-200 from 0-200 run was not better than 13.9s

FYI, now I know how to avoid the throttle closure. Please check the attached photo. I’ll summarize how to set JB4 soon.

[330eJL]

Originally Posted by cola.p

330eJL have you tried 0-200 and what is 100-200 result from that run? I think it should less than 100-200 due to limited time of xtraboost. Mine 100-200 from 0-200 run was not better than 13.9s

FYI, now I know how to avoid the throttle closure. Please check the attached photo. I’ll summarize how to set JB4 soon.

i’ve never tried 0-200. I’ve only done 1/4 mile runs and 100-200. i just don’t have a place to do 0-200.

Nice! please share how you can avoid throttle closure. can you share an excel file with that graph?

[330eJL]

It’s interesting how you car’s boost targets are much higher on the higher gears. Also have you tried doing absolute maps with your throttle closure fix? I think that would be a game changer.

[cola.p]

Originally Posted by 330eJL

i’ve never tried 0-200. I’ve only done 1/4 mile runs and 100-200. i just don’t have a place to do 0-200.

Nice! please share how you can avoid throttle closure. can you share an excel file with that graph?

330eJL Hi,

The key to avoid throttle closure is keep DME_BT above ECU_PSI. When ECU_PSI higher than DME_BT, throttle always close. I just knew this info from one of JB4 tuner.

From my understanding ECU_PSI is boost that JB4 tell ECU and DME_BT is boost target from ECU. Target must more than current boost (that ECU think). JB4 use this to control the throttle open-close. Normally, other cars like 330i, m340i DME_BT usually above ECU_PSI then no throttle closure close issue but our platform 30e is not like them. I don’t know why.


You’ll see my graph comparison that when throttle closes, boost2 less than boost (pre-boost). When throttle opens, boost2 very near or equal to boost (pre-boost) and overall boost is much more stable. Someone said, there is useless of making a lot of boost but boost2 is low. Here is what Terry describe boost2 in JB4Tech.

Boost2: Pressure behind the throttle body in the intake manifold. This is generally a “better” indication of how much boost the engine is actually under. Normally Boost2 will mirror Boost unless the throttle blade is closing enough to limit manifold boost.

More info here here



I accidentally knew the technique to keep ECU_PSI from Terry. I have to tell you that I’m not understand the WGDC, PID, FF things. But the factor that control the ECU_PSI are FF and Duty Bias.

FF and Duty Bias are the same thing. FF is overall adjustment effect to all RPM. Duty Bias is adjustment for each RPM.

Adjusting FF and Duty Bias lower will make ECU_PSI lower. I adjust FF from 50 to 20, almost ESU_PSI is below DME_BT accept in the middle of 3rd gear. Then I adjust Duty Bias on high RPM lower to keep ECU_PSI on all RPM and all gear to be lower than DME_BT.


Please note that after adjusting FF and Cycle Duty, boost will be lower (because ECU_PSI is lower). You should dial more additive boost to keep boost as high as before but beware of Trims max.


Check the attached for before-after graphs and settings and also excel files.

[cola.p]

Originally Posted by 330eJL

It’s interesting how you car’s boost targets are much higher on the higher gears. Also have you tried doing absolute maps with your throttle closure fix? I think that would be a game changer.

330eJL
You saw the boost ramp up in 5th gear, right? Actually, boost target is not higher but DME_BT and ECU_PSI are much higher (ramp up), the additive boost is the same then Boost is much higher.

This is very weird for my 530e (an also my friend's 530e). ECU_PSI usually ramp up around end of 4th gear and beginning of 5th gear only high or full pedal. It usually around 7-9 sec after push full pedal and then ECU_PSI will ramp up. I'm not sure that it is related to Xtraboost or not.

I'be been trying to find why and what are variable for this ramp up but not get the answer yet.

One thing that effect for sure is add more ethanal. Normally, I use E20. When I mixed E85 to E25 or E30, the ramp up events were very slow. Around 15s after full pedal and and the end of 5th gear or 6th gear. Then I get back to E20. Now I use E10 which is a little bit ramp up faster (not confirm).

My ECU_PSI in normal state is around 6-8psi (some point reach 9.x psi) but not reach 10psi. I guess your 330e is more than mine.

The ramp up thing is very difficult for me to tune map 6. If I push the additive higher, during ramp up range will be over boost.



For absolute target, I'll try soon. But before the throttle closure tip, I tried many times and it didn't work.

[330eJL]

This is a good find and I will definitely experiment. I’ve made my FF down to 20 before but I’ve never adjusted Duty Bias. How was your AFR on these runs? And did you get faster times?

[330eJL]

Originally Posted by cola.p

330eJL
You saw the boost ramp up in 5th gear, right? Actually, boost target is not higher but DME_BT and ECU_PSI are much higher (ramp up), the additive boost is the same then Boost is much higher.

Sorry I meant DME_BT and ECU_PSI when i said your boost targets are much higher in higher gears.

[cola.p]

Originally Posted by 330eJL

This is a good find and I will definitely experiment. I’ve made my FF down to 20 before but I’ve never adjusted Duty Bias. How was your AFR on these runs? And did you get faster times?

Try adjust (lower) Duty Bias on some RPM that ECU_PSI touch DME_BT.


For our platform 30e, AFR will be around 14.7 at any pedal and RPM (except 0% pedal). Actually, AFR vary a bit around 14.3-15.5. This is the same before and after this adjustment.

I have not get faster time yet but I think it is safer due to lower boost (no peak) and I can feel much smooth.

[330eJL]

Originally Posted by cola.p

Try adjust (lower) Duty Bias on some RPM that ECU_PSI touch DME_BT.


For our platform 30e, AFR will be around 14.7 at any pedal and RPM (except 0% pedal). Actually, AFR vary a bit around 14.3-15.5. This is the same before and after this adjustment.

I have not get faster time yet but I think it is safer due to lower boost (no peak) and I can feel much smooth.

The graph after the fix definitely looks much better and boost is much smoother. This is great. I will definitely try this and update you.

[330eJL]

cola.p

This did not fix throttle closures for me. It made my preboost and boost2 match much more closely. I tried this a few times with different duty bias from different rpm range. I actually lowered Duty Bias all the way down to 0 starting from 5K and FF to 20. I still had throttle closures. I will do some runs with the latest setting (attached) I have which seems to give me the smoothest boost curve (3rd graph) but I doubt I will be faster.