[Luverse]

Originally Posted by tpoddar

Did you get your ECU remapped from somewhere before using bm3? If you have a 330i, there's no way you have a B48B20A. You can check on bimmercat using your VIN.

It's extremely strange that you're running a B48-F-H map on a 330i. Your tune may not be running right with this setup. I would check the vin first and then contact PTF accordingly.

i don't think so
maybe in my country, the 330i has different engine, since all the bmw is made locally here (to comply with gov. regulation)
in fact, BMW said the 20i and 30i share the same engine, since they had the same part number

i already checked with PTF and send couple of datalog to them, and they never mentioned about the wrong map.

[tpoddar]

Originally Posted by Luverse

i don't think so
maybe in my country, the 330i has different engine, since all the bmw is made locally here (to comply with gov. regulation)
in fact, BMW said the 20i and 30i share the same engine, since they had the same part number

i already checked with PTF and send couple of datalog to them, and they never mentioned about the wrong map.

330i is B48B20B and 320i is B48B20A across the globe. PTF is concerned with the datalog not what car you own, it would be better to enter your vin on bimmercat and check. You can also share your VIN over DM if you'd like, I can help you find out the issue. If your engine shows up as B48-F-H in Bootmod3, either it isn't a 330i or there is some issue with Bootmod3 reading your ECU codes which I doubt.

[Luverse]

Originally Posted by tpoddar

330i is B48B20B and 320i is B48B20A across the globe. PTF is concerned with the datalog not what car you own, it would be better to enter your vin on bimmercat and check. You can also share your VIN over DM if you'd like, I can help you find out the issue. If your engine shows up as B48-F-H in Bootmod3, either it isn't a 330i or there is some issue with Bootmod3 reading your ECU codes which I doubt.

already checked via bimmercat and BMW, mine is 320i M sport edition with all packages in the 330i

previous owner de-badge the car, so i wouldn't know unless it is checked thoroughly.

no wonder the price i paid is far below actual 330i price and little bit cheaper than 320i sport..
i thought i got a steal-deal

[tpoddar]

Originally Posted by Luverse

already checked via bimmercat and BMW, mine is 320i M sport edition with all packages in the 330i

previous owner de-badge the car, so i wouldn't know unless it is checked thoroughly.

no wonder the price i paid is far below actual 330i price and little bit cheaper than 320i sport..
i thought i got a steal-deal

Do you have any logs that you have collected for the stage 2 map? Are you running stage 2 91ACN or stage 2 91 map?

[RMMAGA]

I am convinced that cracked pistons are result of inadequate octane, timing, and AFR.

I have been running 12.2 AFR, 25 - 27 psi, at 5000 - 7000 RPM, with no issues with 17 deg of timing at 30 deg IAT, and 15 deg timing at 40 deg IAT, but you need e30 or better to do this

In log below you can see I am getting some timing corrections even though I raised the knock thresholds levels by 3dB (50%), so even with e30 fuel + e98 meth I am still at the limit of the octane

[tpoddar]

Originally Posted by RMMAGA

I am convinced that cracked pistons are result of inadequate octane, timing, and AFR.

Does this log seem safe to you in terms of timing and AFRs? Or are AFRs concerning to you too?
https://www.bootmod3.net/log?id=6069...729b6db1533568

[RMMAGA]

that looks about right for 95 RON (91), some corrections but nothing of concern

8 deg timing, (40 deg C IAT will have about 2-3 deg of IAT reduction)
12.1 AFR (I think this is about ideal)
18-19 psi (all you really want to do on the stock turbo)

title says your running 93 octane, maybe your gas is not great, you should be able to get a little better timing then that on 93, I think that BM3 uses the stock knock tables, so it should be pretty conservative with the knock protection that should be safe, but may reduce your power as the knock detections will driving your timing down a little due to adaptation

[tpoddar]

Originally Posted by RMMAGA

that looks about right for 95 RON (91), some corrections but nothing of concern

8 deg timing, (40 deg C IAT will have about 2-3 deg of IAT reduction)
12.1 AFR (I think this is about ideal)
18-19 psi (all you really want to do on the stock turbo)

title says your running 93 octane, maybe your gas is not great, you should be able to get a little better timing then that on 93, I think that BM3 uses the stock knock tables, so it should be pretty conservative with the knock protection that should be safe, but may reduce your power as the knock detections will driving your timing down a little due to adaptation

This is on 108 RON gas that I sourced from another place to try the 93 map out. IATs are really limiting timing advance but it's okay, I'm satisfied with the power of the car. I'm glad to hear that the AFRs are safe, they seemed a little lean in the 2k-5k rpm range.

[Axetivo]

I've had a 'flash map' done by a very reputable company that shares files worldwide as they convinced me when I did my exhaust... They quoted 260hp and about 420nm torque. Went on a dyno next day and it made 261 and 430nm,even the dyno man said the map looks clean.. But since there were few failures including the guy from germany on 102ron fuel, I decided to flash it to stock again. A lot of people seem to be blowing it up randomly on motorway when cruising and since I do a lot of mileage, with my luck... It would prob blow up. I guess I'll have to wait a few months and get a b58. Don't get me wrong when tuned, b48 really surprised me for what it is, even if it was only a safe map but totally changed the slow ass car. Everyone had their ideas why them engines blow up but since the guy from germany had a failure, everything went bust and now obviously you are trying to dig deeper and I wish you good luck with that. Maybe just pistons are really poorly made and all of them will eventually fail, just depends how good the afr is etc, as you said earlier. I'm back to my boring 180hp where a fiesta can overtake me now 😂.

[tpoddar]

Originally Posted by Axetivo

Everyone had their ideas why them engines blow up but since the guy from germany had a failure, everything went bust and now obviously you are trying to dig deeper and I wish you good luck with that. Maybe just pistons are really poorly made and all of them will eventually fail, just depends how good the afr is etc, as you said earlier. I'm back to my boring 180hp where a fiesta can overtake me now 😂.

Would going back to stock make any difference now? Like the guy from Germany said, piston damage isn't just a sudden incident but a problem that occurs over time. It is possible that the damage is already done, and all the tuned 20is are just playing with their luck.

Also, it must be noted that there hasn't been a reported case of damage using Bootmod3 except when using terrible quality fuel (see cases of damage in Egypt)
Being an OTS map, I assume there are hundreds if not thousands of users currently using bm3 on their 320i without issues. Maybe the OTS maps are just safer if not the most powerful.

I too thought about going back to stock but until I see evidence of people having issues on the OTS bn3 map, I'll stick to using it with my fingers crossed.

[RMMAGA]

FYI I do think that too much boost with pump gas in low RPM can be an issue or can detonate causing cracked pistons, at high loads the high compression engine is very sensitive to knock in 2000-3000 RPM region, in my tune I ramp the boost in and pull timing out, see below, basically I limit TQ to about 450nm and no more, but I ramp in the boost to maintain 400nm at red line to get the higher power.

Below you can see, I only run 16 - 20 psi at 2500 - 3500 RPM, where engine is more knock prone, and I have also cut our a good amount of timing (about 2 deg) there vs the stock table, I reach peak TQ at 4500 rpm, then try to maintain it until about 6000rpm, where it tapers it off towards reline as the ECU hits the 2 bar boost limit.

I think that one reason why some tuners may have issues is that they have not increased the load scale on the timing map and they run too much boost and timing at low RPM, that could be a deadly combo, they think the stock map is safe, it is not, note that the maximum load scale for B48 is only 170% load, that's like 14-15 psi. So if you mapped at 20 PSI and actually running 200% load, you running off the chart and the timing is not getting reduced when load increased as it should, you can see in my own tune, I have rescaled out the load axis to 220%, and also rescaled the IGN values to represent the higher load by reducing them by 4 degrees across (-4), and that is even running e30 fuel, on pump gas I would want to reduce it even more like >6 degrees at 220% vs the stock table. On the right side you can see the difference map I apply to the stock table to generate my tuned table, and also see that by 4500 RPM I am ramping in the timing and also the boost to generate maximum power

[tpoddar]

Originally Posted by RMMAGA

FYI I do think that too much boost with pump gas in low RPM can be an issue or can detonate causing cracked pistons, at high loads the high compression engine is very sensitive to knock in 2000-3000 RPM region, in my tune I ramp the boost in and pull timing out, see below, basically I limit TQ to about 450nm and no more, but I ramp in the boost to maintain 400nm at red line to get the higher power.

So if you mapped at 20 PSI and actually running 200% load, you running off the chart and the timing is not getting reduced when load increased as it should, you can see in my own tune, I have rescaled out the load axis to 220%, and also rescaled the IGN values to represent the higher load by reducing them by 4 degrees across (-4), and that is even running e30 fuel, on pump gas I would want to reduce it even more like >6 degrees at 220% vs the stock table.

While I do not have access to the OTS map itself to look at timing tables etc. I'll try and compare it to the logs I have. My observations -
1. Peak torque in OTS maps comes around 2700-3500 rpm. None of the OTS maps have more than 400nm torque as per PTF estimates so in terms of torque it seems to be safe.
2. If you have a look at the log I have attached here you will see that compared to stock, 4-5 degrees of less timing is being targeted in the 2500-3500 rpm range like you suggested.
3. In the OTS maps, boost slowly ramps down from 19 psi to 17 psi in the 2000-6800rpm and timing ramps up.
4. My logs don't show any knock so overall boost levels do seem to be safe.

[RMMAGA]

The logs looks good, no corrections, note that on spool corrections are normal, its still more boost then I would run at 2-3k, at about 20psi (200% load), but only at 0-2 deg timing, so it is similar to mine but remember I am running e30 fuel. Personally I would take out 2 degrees on 93 there if it was me, and also run a few psi less boost there, it looks like they have same target as me,

over boosting a little with too much waste gate duty cycle form 2-3k, but I think any OTS will not have a perfect WGDC profile, and the throttle can control it so it safe, it can just result in a lack of smoothness sometimes if it really bad as the throttle kicks and out in to regulate the load you can feel that

I think the OTS maps can be safe, especially as they use the stock knock threshold, if you don't see corrections like in your log your good, if you paranoid, just run one grade higher fuel then you map, that should be very safe.

FYI I am running a hybrid turbo so I can run more boost up top

[tpoddar]

Originally Posted by RMMAGA

I think the OTS maps can be safe, especially as they use the stock knock threshold, if you don't see corrections like in your log your good, if you paranoid, just run one grade higher fuel then you map, that should be very safe.

Yeah, since I am really concerned about this engine's safety I'll continue to use 95 RON map on 99 RON which should give enough safety headroom. I don't get corrections or any other issues. I'll contact PTF to confirm if they alter the stock knock threshold.

[Freddie_Rome]

Do you use max cooling option?

[tpoddar]

Originally Posted by Freddie_Rome

Do you use max cooling option?

I use the option during peak summers (48 degrees C ambient temperature) and on trackdays. Otherwise I dont.

[Freddie_Rome]

Originally Posted by tpoddar

I use the option during peak summers (48 degrees C ambient temperature) and on trackdays. Otherwise I dont.

Mg Flasher allows to set "regular engine temperature". In fact I set 100 C°

[tpoddar]

Originally Posted by Freddie_Rome

Mg Flasher allows to set "regular engine temperature". In fact I set 100 C°

There is no such option available in bootmod3. I'm surprised that such a feature exists in Mgflasher and wonder how it works since engines are designed to work at a specific temperature only.

[Freddie_Rome]

Originally Posted by tpoddar

There is no such option available in bootmod3. I'm surprised that such a feature exists in Mgflasher and wonder how it works since engines are designed to work at a specific temperature only.

It should be simple: thermostat opens earlier. 110°C is the oem (oil) temperature. Pretty high due to ecological restrictions.
In addiction, Max Cool mode gives you an extra temperature decrease, with higher pump flow

[Freddie_Rome]

Finally, I did some tests.
It seems better: no knocks, no timing correction.
Obviously, there is a loss in terms of power/torque, this custom map is de-tuned respect OTS Stage 2 (95RON), which gaves me at least 300 hp and over 400nm (but a lot of knocks and timing correction).
These are 4 datalogs:
https://logs.mgflasher.com/log/9fca5...1-c57f743f8d84

[Luverse]

Originally Posted by tpoddar

Do you have any logs that you have collected for the stage 2 map? Are you running stage 2 91ACN or stage 2 91 map?

https://www.bootmod3.net/log?id=5ff0022fae729b406cb66323

That’s the last log i had, before PTF had to reset all my accounts and clear all the logs

BMW 320i B48 engine
Stage 2 91 Oct (AGG)
93 oct fuel (pertamax turbo)
Catless downpipe
Valvetronic exhaust
Stock intake
FTP Charge pipe
FTP intake pipe
20k miles

How’s your opinion about my log?

[tpoddar]

Originally Posted by Luverse

https://www.bootmod3.net/log?id=5ff0022fae729b406cb66323

How’s your opinion about my log?

The log has been deleted from the server. I can no longer view it.