Tuned my F15 50i - BM3

[ProjektAutoScott]

Sure you can always find something better aftermarket, but that’s a pretty beefy stock rod nonetheless. Read: a bad tune, or detonation will always find something to kill. Pay to play includes your cheap generic flash or piggyback tunes. No safe tune with safe torque limiting is going to bend a tu rod like that. You know what will? 27 pounds of boost, a cheap flash tune/map/poor timing, bad gas, or bad luck. And yes, believe it or not, there is plenty of headroom before you are risking anything serious. You don’t have to take my word for it, obviously you’re aware of this.

Glad to hear you meant spark plugs, I’ll take back my condescending comment for that.

[pits200]

Picasso, please chill, you're passing doomsday small percentage information.

BMW builds a ton of headroom into their boosted engines. With a proper tune, proper octane, and proper maintenance, these engines can easily handle 200/200 addtl tq and hp.

The wide band sensors on bmws are some of the best I've worked with an leave a lot of room for tuning issues but it's not good to rely on those which is the best practice.

[pits200]

Originally Posted by Picasso

Not the tune itself, but it's the much higher boost. Increased boost (basically a highly compressed mix of air pushed inside under huge pressure) just prevents spark from conducting successfully across center and ground electrodes on spark plug and you get misfire. Notice it happens usually only under increased boost (like WOT and metal to the pedal etc)

LOL so it is the tune that increases the boost. More aggressive the tune with boost and IA, the more exact your plug gap needs to be

Please please please stop passing around so much info. Do you know the saying, a little bit of knowledge is dangerous.

[Picasso]

Originally Posted by pits200

LOL so it is the tune that increases the boost. More aggressive the tune with boost and IA, the more exact your plug gap needs to be

Please please please stop passing around so much info. Do you know the saying, a little bit of knowledge is dangerous.

I know I'm probably not helping and just creating unnecessary stress for us n63tu guys. Ok, ok, I got the point.

[Hotea]

I’m just installed bm3 with stage 1 today get drive train malfunction error and miss fire on cylinder 1 and also said injector is off, So I just want know are you Guys also have injector off code? Is dealership can fix it under warranty?(since someone said dealership can see it been tuned even tune back to stock and lock it?)

[Picasso]

Originally Posted by Hotea

I’m just installed bm3 with stage 1 today get drive train malfunction error and miss fire on cylinder 1 and also said injector is off, So I just want know are you Guys also have injector off code? Is dealership can fix it under warranty?(since someone said dealership can see it been tuned even tune back to stock and lock it?)

When you get misfire (due to bad spark plug) car (DME) will turn off corresponding injector to avoid damaging piston/rod. So injector is not bad, it's just turned off on purpose due to misfire. You just need to restart the car and most of the time it clears itself and injector will start working again. You don't have to go to dealership.
However, the issue of bad spark plug will most probably repeat itself, so you probably need to address it by changing all 8 plugs to a new/proper ones, so you won't get misfires anymore.
If you restart the car and the issue remains - then you need to start looking into it, get codes, check coil (swap with any other coil) etc.

[pits200]

Surprisingly the car started stumbling again on a long road trip yesterday. Temps were really hot, around 97 degrees. Cruising and slight acceleration, everything was finw but when I punched it and got into the higher rpm range, the car began to stumble, no codes.

Leads me to believe this tune doesn't taper off IA and boost to account for high IATs due to hot weather or heat soak. Wish I had meth again lol.

I really need to do a log of this tune, I've been slacking

[CT335xi]

Originally Posted by pits200

Surprisingly the car started stumbling again on a long road trip yesterday. Temps were really hot, around 97 degrees. Cruising and slight acceleration, everything was finw but when I punched it and got into the higher rpm range, the car began to stumble, no codes.

Leads me to believe this tune doesn't taper off IA and boost to account for high IATs due to hot weather or heat soak. Wish I had meth again lol.

I really need to do a log of this tune, I've been slacking

That sucks , you would think they would keep it a little more conservative up top to compensate for all kinds of conditions we will see. Would it stumble for a second like a miss or was it longer durations?

[adonnan]

Ok, wow. Replaced all eight coils and rechecked spark gap (also weren’t tight enough oops). Ran stock tune, stage one 93 and stage two 93 and a few pulls in 3rd gear for each.
2017 X5 with N63tu motor, x5m filters, arm cat less downpipes, ngk plugs 97506. No codes. A few minor hiccups in smoothness, but much better now. I watched the fuel gauge needle drop after a few test pulls.

Stock
https://www.bootmod3.net/log?id=5eff...0b431f18a318a5

Stg 1 93
https://www.bootmod3.net/log?id=5eff...90c60719a21394

Stg 2 93
https://www.bootmod3.net/log?id=5eff...729b0eeaca9a66

Awaiting protuning freaks suggestions for improvements.

[Goodfella10]

Originally Posted by pits200

Surprisingly the car started stumbling again on a long road trip yesterday. Temps were really hot, around 97 degrees. Cruising and slight acceleration, everything was finw but when I punched it and got into the higher rpm range, the car began to stumble, no codes.

Leads me to believe this tune doesn't taper off IA and boost to account for high IATs due to hot weather or heat soak. Wish I had meth again lol.

I really need to do a log of this tune, I've been slacking

I’m in the same boat. It’s been a bit hot here and my recent pulls have been stumbling a bit. I’m in the same boat where I need to log and see if they can make some adjustments.

[pits200]

Originally Posted by Goodfella10

I’m in the same boat. It’s been a bit hot here and my recent pulls have been stumbling a bit. I’m in the same boat where I need to log and see if they can make some adjustments.

Ya, too many people with the same issues, this tune has to be too aggressive or something.

Please let me know what you find, I'm on vacation and won't be able to do much this week.

[pits200]

This is really starting to piss me off. Had the Racechip for over a year and never one misfire or stutter. While the BM3 is a bit more powerful, probably 30/30 more, the reliability of this tune is atrocious.

I now can't even punch the car, say being in 3rd gear at 3.5k rpm and after one second of going wot, complete throttle cutoff. It was only 81 degrees out when I tried it and the car wasnt run all day and also was just into the proper operating temp range.

I'm actually going to buy a laptop today while being on vacation and flashing my car back to the stock tune, it's that bad.

This is uncalled for that so many people on this site are having issues. Do we have any stories of people using one of the ots tunes with no problems?

For $900 I am going to aggressively not recommend this product and will be getting a refund when I return home.

[pits200]

Originally Posted by adonnan

Ok, wow. Replaced all eight coils and rechecked spark gap (also weren’t tight enough oops). Ran stock tune, stage one 93 and stage two 93 and a few pulls in 3rd gear for each.
2017 X5 with N63tu motor, x5m filters, arm cat less downpipes, ngk plugs 97506. No codes. A few minor hiccups in smoothness, but much better now. I watched the fuel gauge needle drop after a few test pulls.

Stock
https://www.bootmod3.net/log?id=5eff...0b431f18a318a5

Stg 1 93
https://www.bootmod3.net/log?id=5eff...90c60719a21394

Stg 2 93
https://www.bootmod3.net/log?id=5eff...729b0eeaca9a66

Awaiting protuning freaks suggestions for improvements.

I only looked quickly at the stage 2 93 tune. Im unable to download the csv but is it actually showing an afr steady around 12 across the whole rpm range? I'm new to the N63 tuning world but typically you have leaner afrs at lower rpm range then gradually get richer higher the rpms.

Also, a flat boost curve is terrible, I want them to show us a compressor efficiency chart for stock snails and show that running 21psi at upper rpm band is worth much hp. Typically, for safety sake, there should be a bit of a boost taper as you don't gain much being outside the efficiency range.

Also, 2 timing drops through that 2 gear pull, not terrible though.

Overall, that single log was not terrible but definitely not an ots map that a company should be releasing as part of their product line.

[CT335xi]

Originally Posted by pits200

I only looked quickly at the stage 2 93 tune. Im unable to download the csv but is it actually showing an afr steady around 12 across the whole rpm range? I'm new to the N63 tuning world but typically you have leaner afrs at lower rpm range then gradually get richer higher the rpms.

Also, a flat boost curve is terrible, I want them to show us a compressor efficiency chart for stock snails and show that running 21psi at upper rpm band is worth much hp. Typically, for safety sake, there should be a bit of a boost taper as you don't gain much being outside the efficiency range.

Also, 2 timing drops through that 2 gear pull, not terrible though.

Overall, that single log was not terrible but definitely not an ots map that a company should be releasing as part of their product line.

Definitely not like tuning the n54 ! Good luck man!

[pits200]

Originally Posted by CT335xi

Definitely not like tuning the n54 ! Good luck man!

That's for sure, wish I had the time and dedication to build my own tunes again.

[Fasterthanu68]

I have a 16 xdrive50i with the stage 2 93 octane, catless dps, 90c thermostat, 97506 plugs. I have been trying to figure out super knock codes since being tuned. Only happens on wot and hard downshift mostly. Sounds just like problem others are having. I am at the point where I think the injectors are not flowing enough. Has 59k miles

Attached datalog
https://www.bootmod3.net/log?id=5ea2...90c677c16c19f6

[skoold2003]

Originally Posted by pits200

I only looked quickly at the stage 2 93 tune. Im unable to download the csv but is it actually showing an afr steady around 12 across the whole rpm range? I'm new to the N63 tuning world but typically you have leaner afrs at lower rpm range then gradually get richer higher the rpms.

Also, a flat boost curve is terrible, I want them to show us a compressor efficiency chart for stock snails and show that running 21psi at upper rpm band is worth much hp. Typically, for safety sake, there should be a bit of a boost taper as you don't gain much being outside the efficiency range.

Also, 2 timing drops through that 2 gear pull, not terrible though.

Overall, that single log was not terrible but definitely not an ots map that a company should be releasing as part of their product line.

This thread may be helpful..

https://f15.bimmerpost.com/forums/sh....php?t=1683278

Also, I have an extra BM3 wifi agent if you're interested.. Instead of buying a laptop

[Picasso]

Been there, done that. This is why I still recommend to stay at Stage 1 and call it a day. Safe, much less misfires, and still 90-95% of Stage 2 power. IMHO for n63tu that's the golden balance line you would like to stay. Stage 2 taxes way too many components like fuel pump, injectors maxing out, turbos degrading from higher boost, coils failing, plugs overheating and many other components - just asking for troubles on borrowed time.

[pits200]

Originally Posted by skoold2003

This thread may be helpful..

https://f15.bimmerpost.com/forums/sh....php?t=1683278

Also, I have an extra BM3 wifi agent if you're interested.. Instead of buying a laptop

Thanks but a small laptop is only like 150 bucks and I planned on getting one anyways for other use. Didn't want to buy the wifi agent till after I decided if I was going to keep the bm3 or not.

[pits200]

Everyone's tunes still driving like garbage?

Loaded stage 1, seemed to work good for 2 days but once again, stumbling and hesitating during acceleration.

Now that I'm back home I'll grab some logs of this terrible terrible tune.

[skoold2003]

Originally Posted by pits200

Everyone's tunes still driving like garbage?

Loaded stage 1, seemed to work good for 2 days but once again, stumbling and hesitating during acceleration.

Now that I'm back home I'll grab some logs of this terrible terrible tune.

Is it version 5? Maybe you can ask them to give you version 4 to try out..

[pits200]

Anyone still running this junk of a tune.

How's it running for everyone?