[MyleMan]

Hello, this is my first post on bimmerpost. I have been lurking around the forums and cant seem to find any decent info about XHP on the 21-22 models of the g20 M340xi with the silly Mild Hybrid engine. I want to do it, but I want to ensure it will be somewhat reliable aswell as being worth the money. Considering the adapter will run me 80$ and the license and tune pack is about 400$ its a pretty serious cost. For some background info, I have a 2022 BMW M340xi, DME unlocked by femto running a BM3 93 octane stage 2 tune with a vrsf catless downpipe aswell as the oil catch-can from BurgerTuning. Anyone's experience will be welcome!

[KyK]

Originally Posted by MyleMan

Hello, this is my first post on bimmerpost. I have been lurking around the forums and cant seem to find any decent info about XHP on the 21-22 models of the g20 M340xi with the silly Mild Hybrid engine. I want to do it, but I want to ensure it will be somewhat reliable aswell as being worth the money. Considering the adapter will run me 80$ and the license and tune pack is about 400$ its a pretty serious cost. For some background info, I have a 2022 BMW M340xi, DME unlocked by femto running a BM3 93 octane stage 2 tune with a vrsf catless downpipe aswell as the oil catch-can from BurgerTuning. Anyone's experience will be welcome!

It should be similar to non-mild hybrids when it comes to performance. You can try searching the FB group as a lot more people there are tuned etc. I have a 2020 and I think the difference is pretty noticeable, I'm just not a fan of the bad 3-2 downshift, I can't seem to get it to work properly even with custom settings and redownloading the map. Kind of infuriating that the Supra guys got an entirely revised map that fixed this and the g20 folks haven't yet when it's the same drivetrain.

I personally think it's worth the money especially since you're tuned but they have some issues/bugs to fix IMO.

[AusX3]

Originally Posted by KyK

It should be similar to non-mild hybrids when it comes to performance. You can try searching the FB group as a lot more people there are tuned etc. I have a 2020 and I think the difference is pretty noticeable, I'm just not a fan of the bad 3-2 downshift, I can't seem to get it to work properly even with custom settings and redownloading the map. Kind of infuriating that the Supra guys got an entirely revised map that fixed this and the g20 folks haven't yet when it's the same drivetrain.

I personally think it's worth the money especially since you're tuned but they have some issues/bugs to fix IMO.

Have to reached out to xHP?

They seem to be pretty responsive and helped me out within 24 hours

[isaiahramsey1]

Originally Posted by MyleMan

Hello, this is my first post on bimmerpost. I have been lurking around the forums and cant seem to find any decent info about XHP on the 21-22 models of the g20 M340xi with the silly Mild Hybrid engine. I want to do it, but I want to ensure it will be somewhat reliable aswell as being worth the money. Considering the adapter will run me 80$ and the license and tune pack is about 400$ its a pretty serious cost. For some background info, I have a 2022 BMW M340xi, DME unlocked by femto running a BM3 93 octane stage 2 tune with a vrsf catless downpipe aswell as the oil catch-can from BurgerTuning. Anyone's experience will be welcome!

I’m looking to tune mines as well how much whp does yours have with everything you done to it?

[Russd456]

Originally Posted by isaiahramsey1

I’m looking to tune mines as well how much whp does yours have with everything you done to it?

[IMG][/IMG]

With 93 oct it should be around 420-430 depending on stock numbers. E30 should be between 450-460whp I have the same tune and in the same situation. I bought the license and then saw on the forums that people were having issues

[KyK]

Originally Posted by AusX3

Have to reached out to xHP?

They seem to be pretty responsive and helped me out within 24 hours

I did they were responsive to me as well but suggested redownloading the maps and reflashing and it didn't work so I'm waiting on another suggestion from them.

[billnchristy]

I know it doesn't help you personally, but it has been noted in the XHP thread that the mild hybrids don't suffer from this problem so it's kinda N/A for the OP.

I do hope it gets sorted though, sounds like a PITA

[Simar209]

Originally Posted by KyK

It should be similar to non-mild hybrids when it comes to performance. You can try searching the FB group as a lot more people there are tuned etc. I have a 2020 and I think the difference is pretty noticeable, I'm just not a fan of the bad 3-2 downshift, I can't seem to get it to work properly even with custom settings and redownloading the map. Kind of infuriating that the Supra guys got an entirely revised map that fixed this and the g20 folks haven't yet when it's the same drivetrain.

I personally think it's worth the money especially since you're tuned but they have some issues/bugs to fix IMO.

Hey bro I have a 2020 M340i xdrive, just got a stage 2 bm3 tune done by SSR. I was wondering if you think the XHP is worth it? I’ve heard things about torque limiters removed and shift line pressure etc etc, honestly have no idea what that means as I am new to tuning. Our zf8hp51 transmission has max torque of like 370 ft lb. Where as with stage 2 tune we are pushing near 500ft lb. I asked SSR if I need it and they said not really. What do you think? Did you feel any difference in power or “fastness”? Do you think it’s necessary with a stage 2 tune? It is m daily so don’t want to mess with anything too much. Also, since I am already stage 2 bm3, if I get XHP tcu tune will I need to retune the ecu to compensate for the tcu tune? Or in other words modify the bm3 tune I just got? I just don’t want the transmission tune to negative effect the custom ecu tune I received from SSR

[mike@x-ph.com]

I did it on my G82 M4; I'm not too impressed, to be honest.

The transmission is too jerky and aggressive at low speeds.
It reminds me of the F chassis M4 DCT, which I hated.

Im going back to stock soon.

[lebaaron]

Would be worth it on a not tuned 2020 M340i xdrive?

Thx

[b58.fazil]

As some one who occasionally does pulls and races, the Stage 3 xHP trans tune helps a lot especially paired with my Stage 1 Built Transmission. I also daily the car and have absolutely no problems. 90% of the driving is done in Comfort/Eco and feels much better than stock TCU.

My 1/4 mile, 0-60 and 60-130 did increase a tad bit I should add.

Definitely worth it!

[KyK]

Originally Posted by Simar209

Hey bro I have a 2020 M340i xdrive, just got a stage 2 bm3 tune done by SSR. I was wondering if you think the XHP is worth it? I’ve heard things about torque limiters removed and shift line pressure etc etc, honestly have no idea what that means as I am new to tuning. Our zf8hp51 transmission has max torque of like 370 ft lb. Where as with stage 2 tune we are pushing near 500ft lb. I asked SSR if I need it and they said not really. What do you think? Did you feel any difference in power or “fastness”? Do you think it’s necessary with a stage 2 tune? It is m daily so don’t want to mess with anything too much. Also, since I am already stage 2 bm3, if I get XHP tcu tune will I need to retune the ecu to compensate for the tcu tune? Or in other words modify the bm3 tune I just got? I just don’t want the transmission tune to negative effect the custom ecu tune I received from SSR

To be completely honest with the current downshift bug I don't think its worth it as you'll get the most benefit from stage 3. I don't know why they don't just port over the update they did with the supra. It is noticeably faster when you're on it though. That being said you don't need a retune as its completely separate unless they messed with your torque tables but I have yet to confirm if that was even the culprit of the rough downshifts and I kind of doubt that it is given that other people also had the issue. It is something that is fun to have but as a daily commuter the rough 3-2 downshift got annoying quite quickly, if they fix the bug then yes completely worth it.

[NoTanks52]

Does the referenced down shift bug affect the 2020 non-mild hybrid? And is it in all stages? Trying to narrow down potential issues before pulling trigger on purchasing.

[KyK]

Originally Posted by NoTanks52

Does the referenced down shift bug affect the 2020 non-mild hybrid? And is it in all stages? Trying to narrow down potential issues before pulling trigger on purchasing.

Its only on stage 3

[NoTanks52]

Originally Posted by KyK

Its only on stage 3

Thanks, think you answered my question. Doesn’t sound worth it currently for those with the 2020 if we can’t stage 3 xhp

[jpowers36]

I'm enjoying the benefits of stage 2 on my 2020. I'm sure the 3-2 downshift will be fixed eventually on stage 3. I think there is a new revision out after version 1.0, I need to check.

[Insane435]

Originally Posted by jpowers36

I'm enjoying the benefits of stage 2 on my 2020. I'm sure the 3-2 downshift will be fixed eventually on stage 3. I think there is a new revision out after version 1.0, I need to check.

I would be curious if this is fixed.

[Wet Fish]

Originally Posted by Insane435

I would be curious if this is fixed.

There is a 1.1 dated 12/12/2022 but the release notes make no mention of that specific issue.

[Insane435]

Originally Posted by Wet Fish

There is a 1.1 dated 12/12/2022 but the release notes make no mention of that specific issue.

I reached out to XHP and they stated the issue has been resolved. I am not sure which version this was implemented on. They also stated it only occurred on Stage 3 flashes.

[Wet Fish]

Originally Posted by Insane435

I reached out to XHP and they stated the issue has been resolved. I am not sure which version this was implemented on. They also stated it only occurred on Stage 3 flashes.

I haven’t experienced it on stage 2 but only been on it a few days and not done much driving.

When any of you lot were on stage 3, how would you describe it? Good for daily or a little too hard code?

[cyam]

I am looking at buying this tool as soon as my warranty expires. I have the G20 2020 M340i.

I have no tunes or mods done, but I want to improve the gearbox mappings because I can't find a mapping I love.

I have never used Comfort or Eco modes. I only use Sport individual and Sports +. My Sport Ind is essentially everything Sprts+ except the gearbox is set to Sport.
Sport Ind setup like this is fine, but I am constantly switching between sport and sports plus in everyday driving. I like the quicker and more aggressive downshifts of sports+ but sports+ doesn't change into the higher gears when cruising. So in everyday traffic I use sports + when I slow down or take off, then switch to Sports Ind when cruising. Yes, a bit annoying, but that gives me the experience I like. (Although sometimes I will leave it in Sports Ind and instead of switching to Sports +, I just flick the gear lever to S - that's good, but not as good as Sports +, but it is easier than completely changing modes.)

So I am buying it to modify the maps I use. I am looking to change sport gearbox mode (in D) so that it changes up quicker in the higher gears - like 6->7->8 quicker than it does. BUT get it to downshift those gears MUCH quicker and more aggressively. By doing this I am sure I'll have to switch modes a lot less. Then I can stay in Sport Ind and just switch to Sports + when I am driving hard in some twisting country roads.

Sports+ is a little too aggressive for everyday driving and Sport is not quite aggressive enough and yet it takes a while to shift to the higher gears when cruising (but it does eventually). I do know there is an option within XHP "Switch Off Sport Mode in Cruise" which may be all I need, I guess I'll see, but more than likely I'll do some custom re-mapping.

I don't care about their "stage 1/2/3" maps - in reading them none are really what I want.

The other silly little thing that I love is the gear displayed in D mode like it is in S and M modes.

I don't want to change settings that will reduce the longevity of the gearbox so am not about to remove limiters or things like that. Although I may massage them a tiny bit.

But for me its about customizing the maps so the car does what I would do if it were a actual manual. I find using the paddles a bit troublesome (the issue is not the car but me) I find that using the paddles when driving the car hard because with 8 gears I find it hard to figure which gear I should choose before I enter a corner, and I seem to get it wrong more often than Sports+ does, so I'd rather adjust the mappings so that it behaves like I want it to.

I don't know what some of you are referring to with this 3->2 shifting issue. I don't have any issue there.

[Wet Fish]

Originally Posted by cyam

I am looking at buying this tool as soon as my warranty expires. I have the G20 2020 M340i.

I have no tunes or mods done, but I want to improve the gearbox mappings because I can't find a mapping I love.

I have never used Comfort or Eco modes. I only use Sport individual and Sports +. My Sport Ind is essentially everything Sprts+ except the gearbox is set to Sport.
Sport Ind setup like this is fine, but I am constantly switching between sport and sports plus in everyday driving. I like the quicker and more aggressive downshifts of sports+ but sports+ doesn't change into the higher gears when cruising. So in everyday traffic I use sports + when I slow down or take off, then switch to Sports Ind when cruising. Yes, a bit annoying, but that gives me the experience I like. (Although sometimes I will leave it in Sports Ind and instead of switching to Sports +, I just flick the gear lever to S - that's good, but not as good as Sports +, but it is easier than completely changing modes.)

So I am buying it to modify the maps I use. I am looking to change sport gearbox mode (in D) so that it changes up quicker in the higher gears - like 6->7->8 quicker than it does. BUT get it to downshift those gears MUCH quicker and more aggressively. By doing this I am sure I'll have to switch modes a lot less. Then I can stay in Sport Ind and just switch to Sports + when I am driving hard in some twisting country roads.

Sports+ is a little too aggressive for everyday driving and Sport is not quite aggressive enough and yet it takes a while to shift to the higher gears when cruising [...]

After you flash the stage 1 or stage 2 map there is the option to apply custom settings which includes a ‘custom shift map’ and it basically does exactly that…

You can increase or decrease the shift between each gears based on a percentage of the underlying map - make it downshift earlier or later etc.

I did stage 2 and then custom shift points and it’s pretty close to what I want. Just needs a bit of iterative tweaking over time, especially as it takes 40 miles or so for the flash to settle I believe.