[xcelir8bmw]

HOLY SHIT - HOLY SHIT - HOLY SHIT - HOLY SHIT

Did I get your attention? LOL

So you all know that I am a mad scientist regarding my BMW X2M35i, etc. Well today it was nice out, 85F, and I decided to go ahead and test MAP 2, MAP 1, and MAP 0 (stock), all with the Pipercross air filter in and my updated aftermarket boost gauge going from a Koso to an AEM which is hella more precise. I haven't had a chance to test the vehicle in this type of heat.

MAP 2 = AEM max boost 30.2, 26.5 settled, felt kinda laggy
MAP 1 = AEM max boost 30.2, 24.5 settled, felt kinda laggy
MAP 0 = AEM max boost 29.8, 24.5 settled, felt kinda laggy
OBDII = 22.8

I decided to go from firmware v19 to 18 (remember, i have DWP at 0). Well, upon doing so (and I've done it a few times), everything goes good, then app times out with a 'error 69'. Get a load of that! Hah hah. And well, subsequent times, the app does indeed 'reconnect' to bluetooth adapter on JB4, handshakes, and just sits there spinning and says it can't talk to the unit. Well Bob's your uncle, cause I think the firmware re-writing bit the dust. To me, no big deal, but I have to buy a JB4 data cable to hook it up to my PC and to reflash it. But should I?

MAP 1 and MAP 0 with the JB4 had very similar results. Car felt fine, but still a little laggy.

So I COMPLETELY REMOVED the JB4 and put everything back together and did another test drive.

I put my OBD2 Bluetooth adapter in and ran an app to look at Boost and compare that to my AEM boost gauge which is what I rely on for realz...

Holy Shit. The car was peppy. I mean, really, no lag. Throttle response was improved, and by this time, though it was still 85F, the engine was even hotter. And my initial test run was a half hour or so running around, so it definitely was warmed up.

So what did the AEM say?

STOCK AEM Max boost 29.8, 24.5 settled, did NOT feel laggy
OBDII = 22.8

ME THINKS THE 22.8 NUMBER IS SOMETHING NOT TRUE TO SOMETHING ON THE ENGINE CAUSE I AM READING VIA THE 'AEM' WHAT IS REALLY GOING ON!

So I did what any crazy man would do and I drove around like an asshat and I feel some difference, and hear a little less pop-pop-pop, but the car feels pretty damn good.

So what am I going to do next? I really don't know. Probably buy a data cable and reflash the unit, just to do so, but I was pretty happy settled in at MAP 1, MAP 0, which is really stock with JB4 off. For some reason, I started getting nervous on MAP2 with the heat and the air filter like others have said. In all the air filter/box/pipe tests in the past I know that made things hella boosty and potentially problem some with the JB4, and now just an aftermarket filter, an AEM boost gauge, and I got the same MAP 1, MAP 0, Stock results WITHOUT the laggy feeling, makes me really wonder what good the JB4 is at this point. And that should surprise the hell out of you all because my mad hattery with this vehicle.

I mean I know I am planning a roadtrip still, and was thinking about MAP0ing it on the trip and ECO mode, but now that the JB4 is off, and things seem to perform well, I kinda mind F'd myself and wondering if I should put it back on. Don't get me wrong, MAP 2 is where I was at until it started heating up. Loved that I could change it all and everything the JB4 can provide - but now it just bugs the hell out of me with the results that I got.

Dayam.

Anybody have thoughts?

[xcelir8bmw]

Per my last post...

I just realized that I cannot flash the JB4 because it is required to be installed in car for me to do so and I no longer have a laptop that I can use. I have a desktop PC, but there is no way I am going to work that into the garage. The cost for me to procure a laptop, albeit a cheap one, is just not worth it to me at this point.

With that being said, I'm willing to sell the JB4 + BT module for cheap, with the understanding someone will have to spend $50 bux on getting a PC cable for their laptop to reflash it, and then install it into their vehicle. Looking to get $500 shipped USPS Priority Flat Rate Box.

If no one is interested, maybe I will change my mind post-August cross country trip where I might resurrect this project again. By that time, going to have to get the car serviced and they are going to lock the DME anyway. Wish there was a proper tune available for the car vs. piggy back.

-xcelir8bmw

[rice_rocket88]

I've thought about your situation and I can't really explain it other than perhaps the car has reached some type of adaptation and when you took it off it didn't revert itself back to factory... ie if it's running well it will be at peak, and if it needs to pull timing or see knock then it will ratchet down on itself. I'm still not sure how you get the OBDII reading stock at 22.8 and still get the "real" boost at 24.5 which is the same as your Map1. The boost value itself by JB4 needs to be higher than stock.

Seems kind of weird about your flashing. I would go online and see who has the jb4 cable locally. I think they use all the same serial to USB connector and you could just as easily hook it up. I guess I never thought of it any different since I'm using the cable myself vs the bluetooth. I do like the idea of connecting it via bluetooth, but I've always believed in a good 'ol cable and then just leaving it alone. I still am thinking of a boost gauge because I'm a ricer and I miss it... plus real boost reading all the time is kind of nice.


You could "try" to request the dealer not to lock your DME.. but the way that I see it, this piggyback will be the only way you can keep a tune whether they lock the DME or not! There are a few places locally that will DME flash tune, but they still output the same 30hp increase, so I'm just as happy keeping my setup with the JB4. If BMW does manage to lock the DME and render any of my money/flashing useless I would be rather upset!

[xcelir8bmw]

I had a thought to bench install JB4.

Faith renewed.

Back in business!!! Installed 2.0

Firmware through BT installed!!!!

Yeah.

[xcelir8bmw]

Interesting results

map 2, 32 spike, 26.5 settle
map 1, 30.2 spike, 24.7 settle
map 0, 27.5 spike, 23 settle

85F

performs more normal

jb4 app and aem match spikes

no fail safe issues

maybe it was heat plus firmware 19?

going back to map 1 cause it performs like map 2 when cold

happy

[xcelir8bmw]

Yup, I drove around a lot today back on firmware 18. Everything is normal, like it was months ago before it got hot and v19 trials.

map 0 does drive like stock on v18

map 1 drives like map 2 when cold on v18 and boost spikes to 30

map 2 is just insane with it hot on v18 and several boost spikes to 32 (only running map 1 now because of this, but I don't get failsafes)

With it being hot outside, I noticed that it is harder to get to 'settled boost' in either of the maps, and I need tarmac.

I haven't logged anything yet, just to see, but, meh, I'll do that tomorrow.

Nonetheless, regrown love for this thing.

[//TMT]

Originally Posted by 21M235IXGC

I just purchased 4 bottles of boostane professional . If I add 3 oz of a container to a 10 gallon tank of 93 it will produce to 97 octane . 👍🏻👍🏻

The US X2 M35i has a standard 15+ gallon tank, btw.

[BlownLSX]

I went to v17 software and the car feels wayyyyy better.

[xcelir8bmw]

Stable version 17, 18 beta, 19 alpha

[BlownLSX]

Originally Posted by 21M235IXGC

Xcel have you tried v17 . I'm currently back on v18 . Is it worth to drop back down to v17.

Blown what do you notice different in v17

Just overall better, holds timing all the way to redline now. Shifts arnt jerky anymore. Seeing consistent 26-27 psi in 3rd.

[xcelir8bmw]

Haven't tried 17 yet. But will do so hopefully soon.

[xcelir8bmw]

17 installed

65 degrees

map 1

rear tires chirped twice and kicked in hard

had rev hang once

will continue to test as temps get warmer

and I don't recall why I never ran 17

wow

[xcelir8bmw]

17 too soon to tell

18 was good for me across board

19 sucked

and you are right about 18 availability, good thing I have it backed up as 19 was alpha and now beta

[//TMT]

Originally Posted by 21M235IXGC

Does anyone know the difference with the labels stable , alpha , beta etc and the reasoning behind it

There's plenty of room for interpretation by each developer, but...

https://en.wikipedia.org/wiki/Softwa...ase_life_cycle

[//TMT]

Yeah, but "stable" can be boring and leave room for improvement.

Generally, when a developer tags as "beta" it means there's something new and it's good enough for broad testing, but they're looking for feedback. So be sure to pass along your impressions to them!

[billnchristy]

I run motul 0w20 specific.
I have had one instance where I had to add oil as well.

[BlownLSX]

Dealer filled shell 0-20.

[//TMT]

It's fairly normal for a tune to cause additional oil consumption if you drive it hard. The mixture goes rich, which washes oil film from the cylinder walls. The cost of performance!

Be careful using thicker oil. It will flow more slowly into the bearings, and won't necessarily fix the root cause.

[rice_rocket88]

Used to run a catch can on all my cars.. so there's no real downside. I could honestly say none of my cars had enough blow by that would fill any of my catch cans... however there would be a little bit of oil in the intercooler piping. I doubt a car this new would have that much issue, but I guess it wouldn't hurt long term. Not on my radar yet unless there's something nicely made and cheap enough.. It really is just a few hoses and a can...

[//TMT]

I'd be very surprised if this engine needs one. Personally, I wouldn't add it.

[BlownLSX]

Do not add a catch can. The pcv is heated and monitored. Don't fix something that ain't broken. The car doesn't need one.

[xcelir8bmw]

I had the Mishimoto fail twice on me due to pin sized weld issues. Two different ones! Pissed me off! That was on my STI.

We don't need it in the X2.