[BMWILUVU]

Originally Posted by GT500R

Reverse that statement.

Price lowered not too long ago.

[B58 parts]

Just flashed stg1 93. Something isn't right. It surges. Wot 3rd gear, it hits real hard, cuts back, builds back up, cuts back .. repeat 4 or 5 times all the way to redline. Any thoughts? Car ran perfect on stock map. Only engine mod is bms intake. I am always in DSC off mode.

[eric97h]

Originally Posted by HLJustin

There's no options to select closed valves for comfort mode. When I originally had MPPSK installed exhaust valves were always defaulted to closed in comfort with exception of cold start. Tune has valves open at all times but no burbles in comfort. Sport and sport + only changes throttle response and burble aggressiveness. Would really like having silent comfort mode back

I have Mppk as well are you sure valves are open in comfort and eco as well ?

[HLJustin]

Originally Posted by eric97h

I have Mppk as well are you sure valves are open in comfort and eco as well ?

Positive. When I switch between modes there's no sound from electronic valves actuating. However when I use iCarly to manually control valves it works

[TreDirtyFive]

Originally Posted by YuminNuman

Just flashed stg1 93. Something isn't right. It surges. Wot 3rd gear, it hits real hard, cuts back, builds back up, cuts back .. repeat 4 or 5 times all the way to redline. Any thoughts? Car ran perfect on stock map. Only engine mod is bms intake. I am always in DSC off mode.

Sounds like throttle pull from torque limiter intervention?

[eric97h]

Originally Posted by HLJustin

Positive. When I switch between modes there's no sound from electronic valves actuating. However when I use iCarly to manually control valves it works

So I can’t even make bootmod close the valves ? From exhaust valve actuation ?

[j1980mac]

Originally Posted by G.Newt

Did you try resetting codes and adaptations?

Would I do this through the BM3 app?

[HLJustin]

Originally Posted by eric97h

So I can’t even make bootmod close the valves ? From exhaust valve actuation ?

Yep, which I find strange. Only works with iCarly valve actuator.

Do you have MPPSK and not have this issue after flash? Bc normally on stock MPPSK car is loud on start up bc cold start, but then settles in after a min or so with valves closed. If I switch to sport it stays closed until you throttle is applied, at which point you hear it actuate. If you switch back to comfort you hear valves actuate right away

[eric97h]

Originally Posted by HLJustin

Yep, which I find strange. Only works with iCarly valve actuator.

Do you have MPPSK and not have this issue after flash? Bc normally on stock MPPSK car is loud on start up bc cold start, but then settles in after a min or so with valves closed. If I switch to sport it stays closed until you throttle is applied, at which point you hear it actuate. If you switch back to comfort you hear valves actuate right away

Ya exact same as you I really don’t want my valves to be open in comfort and eco this is really bad and loud with my downpipe

[HLJustin]

Originally Posted by eric97h

Ya exact same as you I really don’t want my valves to be open in comfort and eco this is really bad and loud with my downpipe

Here's to hoping that someone is able to provide solution! We out in California got CHP and PDs with no chill when it comes to car mods. Can't afford exhaust violation and trip to BAR, spent all my money on mods and tunes already haha

[eric97h]

Originally Posted by eric97h

Ya exact same as you I really don’t want my valves to be open in comfort and eco this is really bad and loud with my downpipe

Why can’t it work just like how Mppk does I emailed them already about this

[kern417]

Originally Posted by Araemo

No, but it is traditionally used for dyno runs because it should have the 'least' drivetrain loss. That wouldn't effect the datalogging on the street any though.

Really it's because every other gear has a larger multiplier on torque. The gear that's closest to 1:1 will be the gear that's closest to telling you actual engine output.

Originally Posted by HLJustin

There's no options to select closed valves for comfort mode. When I originally had MPPSK installed exhaust valves were always defaulted to closed in comfort with exception of cold start. Tune has valves open at all times but no burbles in comfort. Sport and sport + only changes throttle response and burble aggressiveness. Would really like having silent comfort mode back

Originally Posted by HLJustin

Here's to hoping that someone is able to provide solution! We out in California got CHP and PDs with no chill when it comes to car mods. Can't afford exhaust violation and trip to BAR, spent all my money on mods and tunes already haha

Sorry I mentioned the wrong menu. This is what I am talking about, under the diagnostics section. Select "Auto" or "closed" and see if that changes anything? Maybe I'm misunderstanding what this menu is used for.

[eric97h]

Originally Posted by kern417

Really it's because every other gear has a larger multiplier on torque. The gear that's closest to 1:1 will be the gear that's closest to telling you actual engine output.





Sorry I mentioned the wrong menu. This is what I am talking about, under the diagnostics section. Select "Auto" or "closed" and see if that changes anything? Maybe I'm misunderstanding what this menu is used for.

I Litterally spammed and tried this for a hour straght I pressed it while engine was on and off it did nothing lol

[eric97h]

Originally Posted by BMWILUVU

Price lowered not too long ago.

LmAoo so whoever bought it back than they got ripped hard ?

[B58togo]

Originally Posted by E90ROXS

Why is Mission Tuning is more expensive than this tune?

Originally Posted by GT500R

Reverse that statement.

Originally Posted by BMWILUVU

Price lowered not too long ago.

Supply and demand isn't rocket science. When you're the only game in town (well....as of last summer anyway), you can charge whatever you want. It's no coincidence the new Mission group buy price commenced the same day PTF dropped. You'll soon see Mission's price permanently drop to a price point right in line with the rest.

[B58 parts]

Originally Posted by TreDirtyFive

Sounds like throttle pull from torque limiter intervention?

Maybe .. i can't tell if the big hit is over boosting or if the big hit is the stg 1 and it's cutting back to save itself. Partial and 3/4 throttle seems to be smooth, quite a bit spicier. It's only WOT the turbo noise changes back and forth through the rev range and the power curve is a wave .. it feels like a throttle cut or it's not getting fuel.. but it also feels like it is going to run up off the cliff as it gets quite loud

Car is a manual in dsc off mode so i don't know why else it would be cutting. I tried sport+ and it did the same. Plugs are new OEM everything else really seems fine.

I guess I will try reset adaptations and get the logs .. I assumed flashing the entire module like that would reset them but apparently not.

[Sub1427]

Originally Posted by YuminNuman

Maybe .. i can't tell if the big hit is over boosting or if the big hit is the stg 1 and it's cutting back to save itself. Partial and 3/4 throttle seems to be smooth, quite a bit spicier. It's only WOT the turbo noise changes back and forth through the rev range and the power curve is a wave .. it feels like a throttle cut or it's not getting fuel.. but it also feels like it is going to run up off the cliff as it gets quite loud

Car is a manual in dsc off mode so i don't know why else it would be cutting. I tried sport+ and it did the same. Plugs are new OEM everything else really seems fine.

I guess I will try reset adaptations and get the logs .. I assumed flashing the entire module like that would reset them but apparently not.

Originally Posted by YuminNuman

Maybe .. i can't tell if the big hit is over boosting or if the big hit is the stg 1 and it's cutting back to save itself. Partial and 3/4 throttle seems to be smooth, quite a bit spicier. It's only WOT the turbo noise changes back and forth through the rev range and the power curve is a wave .. it feels like a throttle cut or it's not getting fuel.. but it also feels like it is going to run up off the cliff as it gets quite loud

Car is a manual in dsc off mode so i don't know why else it would be cutting. I tried sport+ and it did the same. Plugs are new OEM everything else really seems fine.

I guess I will try reset adaptations and get the logs .. I assumed flashing the entire module like that would reset them but apparently not.

I'm in the same boat... It's not smooth at all.. Surges and quits... WOT has waves of power then dies.. Around town driving is fine. May need to let the car adapt the 50 miles to see... Time will tell... Downpipe goes in in 10 hours... Stg 2 here we come... Probably surge(y) stg 2...Hopefully not

[Araemo]

Originally Posted by YuminNuman

Just flashed stg1 93. Something isn't right. It surges. Wot 3rd gear, it hits real hard, cuts back, builds back up, cuts back .. repeat 4 or 5 times all the way to redline. Any thoughts? Car ran perfect on stock map. Only engine mod is bms intake. I am always in DSC off mode.

Post a datalog or else people can only guess.

[hybris]

Those with problems should probably post a datalog to support to get a good answer

And for reference to a number of other questions in this thread, here's the manual - it's quite good https://bootmod3.atlassian.net/wiki/...d3+User+Manual

[BMW4RVR]

I have a stock 340i xdrive with 48k miles. I am planning to get BM3 and use the stage1 91 octaine map. This will be the first time I am tuning a BMW and need your help.

My questions are:

1.How does it impact the life of the engine and Turbo if I keep it at Stage 1?

2 . Is it true that if I install a DP and use the related map it would extend the life of the Turbo (a safer tune)?

3. For the safest tune and power increase, what would be your recommendation? (Except for leaving it stock)

Thanks,

[NISFAN]

Originally Posted by BMW4RVR

I have a stock 340i xdrive with 48k miles. I am planning to get BM3 and use the stage1 91 octaine map. This will be the first time I am tuning a BMW and need your help.

My questions are:

1.How does it impact the life of the engine and Turbo if I keep it at Stage 1?

2 . Is it true that if I install a DP and use the related map it would extend the life of the Turbo (a safer tune)?

3. For the safest tune and power increase, what would be your recommendation? (Except for leaving it stock)

Thanks,

I often read the principle that a decat is somehow 'easier' on the turbo. It seems the posters of this message have the idea that the cat creates a blockage which somehow adds additional pressure and load to the turbo.
I've even heard that decat helps thermal management of the turbo by allowing the hot gasses to pass freely. This second part is especially hilarious to those in the know.

The above idea is completely flawed. It's what happens when untrained people try to make logic out of complex science.

Reality: It is common for OEM turbo installations to have a physical turbo exit restriction. This helps the wastegate control boost pressures as it softens the ability of the turbo to overspeed in high flow conditions. It can also help with turbine surge, but that is another subject. This restriction limits the volume flow of gas that can pass through the turbo and therefore the turbine speed. In the case of the B58, that restriction appears to be the cat.
Remove the cat and you place all the effort of controlling turbine speed on the wastegate alone. Now whilst that is the WG's job, it will be tuned in standard form to react to stock system requirements, this includes PWM of the control signal. Remove the physical flow control device 'the cat' and you are almost certainly going to experience spikes of overboost and turbine overspeed that the WG just cannot react to in the time it happens. That in no way makes it 'easier for the turbo'.

Conclusion: removing the cat places higher strain on the turbo. Period.

[BMW4RVR]

Originally Posted by NISFAN

I often read the principle that a decat is somehow 'easier' on the turbo. It seems the posters of this message have the idea that the cat creates a blockage which somehow adds additional pressure and load to the turbo.
I've even heard that decat helps thermal management of the turbo by allowing the hot gasses to pass freely. This second part is especially hilarious to those in the know.

The above idea is completely flawed. It's what happens when untrained people try to make logic out of complex science.

Reality: It is common for OEM turbo installations to have a physical turbo exit restriction. This helps the wastegate control boost pressures as it softens the ability of the turbo to overspeed in high flow conditions. It can also help with turbine surge, but that is another subject. This restriction limits the volume flow of gas that can pass through the turbo and therefore the turbine speed. In the case of the B58, that restriction appears to be the cat.
Remove the cat and you place all the effort of controlling turbine speed on the wastegate alone. Now whilst that is the WG's job, it will be tuned in standard form to react to stock system requirements, this includes PWM of the control signal. Remove the physical flow control device 'the cat' and you are almost certainly going to experience spikes of overboost and turbine overspeed that the WG just cannot react to in the time it happens. That in no way makes it 'easier for the turbo'.

Conclusion: removing the cat places higher strain on the turbo. Period.

Originally Posted by NISFAN

I often read the principle that a decat is somehow 'easier' on the turbo. It seems the posters of this message have the idea that the cat creates a blockage which somehow adds additional pressure and load to the turbo.
I've even heard that decat helps thermal management of the turbo by allowing the hot gasses to pass freely. This second part is especially hilarious to those in the know.

The above idea is completely flawed. It's what happens when untrained people try to make logic out of complex science.

Reality: It is common for OEM turbo installations to have a physical turbo exit restriction. This helps the wastegate control boost pressures as it softens the ability of the turbo to overspeed in high flow conditions. It can also help with turbine surge, but that is another subject. This restriction limits the volume flow of gas that can pass through the turbo and therefore the turbine speed. In the case of the B58, that restriction appears to be the cat.
Remove the cat and you place all the effort of controlling turbine speed on the wastegate alone. Now whilst that is the WG's job, it will be tuned in standard form to react to stock system requirements, this includes PWM of the control signal. Remove the physical flow control device 'the cat' and you are almost certainly going to experience spikes of overboost and turbine overspeed that the WG just cannot react to in the time it happens. That in no way makes it 'easier for the turbo'.

Conclusion: removing the cat places higher strain on the turbo. Period.

Thank you for your great reply. I appreciate it . In this case do you recommend simple Stage 1 tuning? I am not looking for crazy power increase.