[OzBMR]

Originally Posted by Uni-Rapide

Thanks for the feedback.
What about the throttle closures? I assume that's due to boost being over target? Is that something that can be solved by a (custom) tune?

The fact that my second 98RON run showed higher power and torque is that within the tolerances of the measurement or is there another explanation?

The throttle helps to manage torque/load as part of the manifold boost pressure control system, along with the waste gate.

If in the logs you activate Load Required %, Load Actual RAM and Throttle Position you'll see that the throttle closes a bit where Load Actual exceeds Load Required. If it exceeds the target by too much you may also see a Torque Limiter activated. A custom tune would be able to reduce the throttle closing if it's concerning you.

If you use SAE correction in Virtual Dyno, adjusting for the different ambient pressure and temperature would make a difference. You're also using smoothing factor of 1. I'd recommend using smoothing of 3 as a minimum.

Edit: Check your tire size in VD as well, should be 26.03 if you have 255/40/18 or 255/30/19 rears.

[IMS-340C]

You already have 20 psi boost at top end and your timing is 5 degrees which is very low.

I think you should try 20 psi at midrange and reduce boost gradually to 18 psi from 5500 to redline.

Originally Posted by F80Moe

Just asked him to lower midrange to 20psi and hold till redline perhaps compensate with more timing

[InstigatorX]

Originally Posted by Uni-Rapide

First of all I would like to thank kern417 for staring this thread, very interesting and it has been a steep learning curve!

I was interested in finding out the difference between RON102 and RON98 fuel. A couple of weeks ago I went to Germany and got some Aral 102 and when my tank was almost empty I did a log. Last week when my Shell V-Power 98 was almost empty I did logs, you can find all three here: https://datazap.me/u/remko3dl/ron102...&data=3-19
All three runs were done on the same stretch of road in the same direction.

What really surprised me was the higher boost with the RON98 fuel! As I'm new with this I guess that it might have to do with the higher IAT's and charge air temps during the RON98 runs? What do you think?

I used Virtual Dyno as well to see the differences. (thanks to OzBMR for showing in this thread how to use it!)
In the first screenshot you can see there is not a lot of difference between RON102 and RON98, although 102 is much smoother. I expected RON102 to be clearly stronger than RON98 but the difference is not that big. Maybe it's because I'm still on the stock tune and it doesn't take much advantage of the higher octane?
The second screenshot shows my second RON98 run which I started at a higher rpm and according to Virtual Dyno I now made more power and torque on RON98?

Be careful running too low on fuel while logging. DME will not give full power to protect engine from fuel starvation and skews log results. I think when it hits 50 miles left warning it kicks in.

Freaked me out first time it happened as some said I had a boost leak.

[yokata]

Well Paul finished my e30 map all i can say he make excelent job imo. For my altitude and hot summer temps i think my log looks perfect (1800-2200DA) https://www.bootmod3.net/log?id=5f21...90c67e9ceed34b waiting for masterminds to comment

[F80Moe]

Originally Posted by IMS-340MP

You already have 20 psi boost at top end and your timing is 5 degrees which is very low.

I think you should try 20 psi at midrange and reduce boost gradually to 18 psi from 5500 to redline.

Yes but with 6psi less midrange boost, won't that help with the gradual increase of timing?

[Torinalth]

Think I've got a winner now between my current e30 blend, stage 2+ e30 map, and how my car likes to run. Probably the prettiest log I've produced. Only slight concern is the somewhat erratic HPFP up and down mid RPM. Thoughts?

2019 X3 M40i
BM3 Stage 2+ E30 map
~E32 fuel
MST intake
VRSF charge pipe
ER catted and coated downpipe
Dorch Stage 2 HPFP

5th gear pull.
https://www.bootmod3.net/log?id=5f22...90c67f30eb14f7

[IMS-340C]

It will help with lower IAT building up which will improve your timing, anyway you have to log and see the results and make changes from there.

Apparently the B58 combined with bad fuel doesn't like hot weather especially when it reaches 40 degrees C.

Here's my stock MPPSK log in 40 degrees C, a total mess:

https://datazap.me/u/ims/mppsk-40-de...og=0&data=4-22

Originally Posted by F80Moe

Yes but with 6psi less midrange boost, won't that help with the gradual increase of timing?

[Uni-Rapide]

Originally Posted by OzBMR

If you use SAE correction in Virtual Dyno, adjusting for the different ambient pressure and temperature would make a difference. You're also using smoothing factor of 1. I'd recommend using smoothing of 3 as a minimum.

Edit: Check your tire size in VD as well, should be 26.03 if you have 255/40/18 or 255/30/19 rears.

Unfortunately I didn't select the ambient temp during the logs and can't remember the temp when I did the 102RON run so SAE correction is a bit of a guess. For future logs I have selected ambient temp ;-)
I selected smoothing factor 1 based on the smooth 102RON but will try the higher smoothing factor.

I'm running 265/35/19 rears so that's why my tire size is a bit larger.

[F80Moe]

Originally Posted by IMS-340MP

It will help with lower IAT building up which will improve your timing, anyway you have to log and see the results and make changes from there.

Apparently the B58 combined with bad fuel doesn't like hot weather especially when it reaches 40 degrees C.

Here's my stock MPPSK log in 40 degrees C, a total mess:

https://datazap.me/u/ims/mppsk-40-de...og=0&data=4-22

Will do, add then 5 gallons of ms103 (98 total 50/50 mix) log again

[designatedposter]

Originally Posted by yokata

Well Paul finished my e30 map all i can say he make excelent job imo. For my altitude and hot summer temps i think my log looks perfect (1800-2200DA) https://www.bootmod3.net/log?id=5f21...90c67e9ceed34b waiting for masterminds to comment

i haven't looked into many b58 logs, however, your boost data is interesting:

your pre throttle boost is consistently ~4 psi over target.. yet the "boost deviation" channel only reports 0.4 psi..makes me wonder when DME will intervene, if at all. weird thing is your MAP is flatline with the target, so, is this a limitation of that sensor? did you upgrade the tmap sensor?

timing looks good.

[yokata]

Originally Posted by designatedposter

i haven't looked into many b58 logs, however, your boost data is interesting:

your pre throttle boost is consistently ~4 psi over target.. yet the "boost deviation" channel only reports 0.4 psi..makes me wonder when DME will intervene, if at all. weird thing is your MAP is flatline with the target, so, is this a limitation of that sensor? did you upgrade the tmap sensor?

timing looks good.

Look at boost target (actual) bro im with vt gc ,boost is perfect I didnt upgrade the sensor.

[OzBMR]

Originally Posted by Torinalth

Think I've got a winner now between my current e30 blend, stage 2+ e30 map, and how my car likes to run. Probably the prettiest log I've produced. Only slight concern is the somewhat erratic HPFP up and down mid RPM. Thoughts?

2019 X3 M40i
BM3 Stage 2+ E30 map
~E32 fuel
MST intake
VRSF charge pipe
ER catted and coated downpipe
Dorch Stage 2 HPFP

5th gear pull.
https://www.bootmod3.net/log?id=5f22...90c67f30eb14f7

Does look good. HPFP rail pressure is OK.

[OzBMR]

Originally Posted by yokata

Well Paul finished my e30 map all i can say he make excelent job imo. For my altitude and hot summer temps i think my log looks perfect (1800-2200DA) https://www.bootmod3.net/log?id=5f21...90c67e9ceed34b waiting for masterminds to comment

Looks good Yokata, especially considering ambient conditions.

Did you do anything with the coil pack because cylinder 1 is much better timing now?

Will you revert to 100RON tune or stick with ethanol?

[yokata]

Originally Posted by OzBMR

Looks good Yokata, especially considering ambient conditions.

Did you do anything with the coil pack because cylinder 1 is much better timing now?

Will you revert to 100RON tune or stick with ethanol?

Ill drive it to enjoy one more month and after just from time to time cuz ethanol is 3,50euro per liter here I didnt change coil pack

[Sleeper340i]

Been having a weird sound with my car and after a few week of shop time and not getting it fixed I'm pretty sure i narrowed it down to wastegate issue.
Trying to verify before I bring the car back to the shop a second time for weeks again.

Wondering if you guys can see anything weird with this log? Wastegate specifically but anything abnormal is fine.

https://datazap.me/u/alfanzo2/pure-8...;zoom=560-2911

When comparing my WGDC% to my previous logs it seems about the same. First 3rd gear pull is under boosting but the pull after is hitting target PSI which is weird..

[RMMAGA]

Originally Posted by yokata

Well Paul finished my e30 map all i can say he make excelent job imo. For my altitude and hot summer temps i think my log looks perfect (1800-2200DA) https://www.bootmod3.net/log?id=5f21...90c67e9ceed34b waiting for masterminds to comment

The log looks very good, your tuner is knows what he is doing. I think for boost control this is a really nice log, one of the best

I think he basically used the boost limit to limit the top end boost / load > 5500RPM, then used the load limit to regulate the boost < ~5500rpm, that is exactly what I do and it works a treat, and I think give nice feeling power band.

there are some odd discontinuous in your timing, and its not correction related (knock & IAT), as you correction is stable, so you should ask him to see if anything odd in the IGN tables, like some changes that need to be smoothed out, with IGN vs load for example, as you should not see the IGN change by my almost 2 deg when load is only changing by a few %, or did you leave your TC on? if so that may also be some TC issue

[kern417]

Originally Posted by RMMAGA

The log looks very good, your tuner is knows what he is doing. I think for boost control this is a really nice log, one of the best

I think he basically used the boost limit to limit the top end boost / load > 5500RPM, then used the load limit to regulate the boost < ~5500rpm, that is exactly what I do and it works a treat, and I think give nice feeling power band.

there are some odd discontinuous in your timing, and its not correction related (knock & IAT), as you correction is stable, so you should ask him to see if anything odd in the IGN tables, like some changes that need to be smoothed out, with IGN vs load for example, as you should not see the IGN change by my almost 2 deg when load is only changing by a few %, or did you leave your TC on? if so that may also be some TC issue

Mine does the same thing. Paul has VERY high sensitivity for adjustments in his logs. I think it allows him to safely tune while pushing your hardware. So there are a million tiny adjustments being made in the logs, but from the driver's seat everything feels smooth.

[alyabiev]

Originally Posted by kern417

Mine does the same thing. Paul has VERY high sensitivity for adjustments in his logs. I think it allows him to safely tune while pushing your hardware. So there are a million tiny adjustments being made in the logs, but from the driver's seat everything feels smooth.

The problem is that Target Timing is all over the place instead of being a smooth line rising with RPM. There should be no dips in target timing in the "load path" in the Ign Table. These dips indicate either a torque intervention or lazyman's tuning approach that touches only the cells used through the runs at fixed IATs/CTs.

[InstigatorX]

Latest w/ MG ST1+ v2.11 on E20 mix & Injen CAI on 2018 440i GC...

https://bmw.***********.com/graphs/log-07-31-2020-20-09-45.2059/?series=1&zoom=-1,137

I ran out of road at 6000 rpm, but figured better than nothing.

EDIT: just realized the url was redacted...street of spool 😁

[OzBMR]

Here's the log file from my 10.93@127MPH run at the drag strip today. Did two almost identical runs within 0.01s.

https://datazap.me/u/ozbmr/ozbmr-dra...23-24-25-26-27

[alyabiev]

Originally Posted by InstigatorX

Latest w/ MG ST1+ v2.11 on E20 mix & Injen CAI on 2018 440i GC...

https://bmw.***********.com/graphs/log-07-31-2020-20-09-45.2059/?series=1&zoom=-1,137

I ran out of road at 6000 rpm, but figured better than nothing.

Looks really solid, I notice nothing abnormal. I bet the torque delivery is very smooth and seamless with these torque and ignition curves.

Also for everyone saying that anything leaner than 12.5 throughout the RPMs is dangerous - look closely at the AFRs here and take a note.

Direct injection fuel system does not need excessively rich AFR (<12.5:1) to keep the engine safe. Significantly higher fuel rail pressure with DI systems provides very good fuel atomization which helps dissipate heat in the cylinder. Running richer not only does waste gas but can also reduce torque.

[cosworthpower]

Originally Posted by OzBMR

Here's the log file from my 10.93@127MPH run at the drag strip today. Did two almost identical runs within 0.01s.

https://datazap.me/u/ozbmr/ozbmr-dra...23-24-25-26-27

Wow! What tyres did you run?