[proTUNING Freaks]

UPDATE:
https://f87.bimmerpost.com/forums/sh....php?t=1731097

[David.m]

Might be of interest to anyone thinking about a tune on their N55 and what extra pwr to expect (I at least couldn't find much reliable info). I've just had a custom stage 2 tune, bolt-ons are Fabspeed sport cat, Wagner EvoII Comp, VRSF CP otherwise stock.

Hub dyno showed stock 232kw/474Nm which seems about right assuming 15% drivetrain loss. Tuned 273kw/608Nm.

I also used the Custom Throttle Mapping feature (again I couldn't find any user feedback on this) and can say it works great. Having a 6MT I don't see any benefit to having changing throttles, in fact it's a negative having to adjust throttle/clutch action to maintain smooth shifting. I also didn't like the sensitive Sport+ throttle, coupled with MDM it was just to easy to induce too much throttle oversteer when driving at/near the limit. My Sport+ mode now has Sport throttle/MDM, so effectively I have the same Sport throttle whether I select full traction on, MDM or DSC OFF (just like M2C owners can select). I also added rev-match to DSC OFF, flame away

[3t3p]

Thank you that is interesting.

232 Kw = 311whp

273kw=366whp

Drive train losses are fixed amount rather than a percentage, but unless BMW release that then its hard to say but roughly if it is meant to be 365hp at the crank and you measured 311 then the drive train takes a fixed amount of ~54hp to turn it over

so your tuned crank hp is roughly 366 + 54= 410hp/305Kw

[David.m]

Originally Posted by 3t3p

Drive train losses are fixed amount rather than a percentage

Another instance of google misinforming me

[3t3p]

Everyone does it and I see why but it's too simplistic and doesn't make sense especially as power levels change.

Something I learnt back when electric motors sometimes needed gearboxes in R/C planes. We deduced they took a fixed amount of power to turn over, provided you can provide an excess of that power it just draws the same amount.

Not sure if that explains things that well but view the drivetrain as a seprate machine you need to turn over. Provide that power and anything extra comes out the other end. Add more power and it doesn't magically know to draw more parasitic power so we on the forums can say it takes 15% the whole time.

[mr_lab_rat]

Originally Posted by designatedposter

custom throttle mapping is not a feature in bm3 per se, but it can certainly be done if you make your own tune. Bm3 allows you to use the stock tune as a baseline for which you build your own custom tune. They do not allow you to edit their ots tunes, aside from the drop down menu items like Burble and speed limiter.

With that said, dzenan did say a while ago he would consider it as a feature like Burble that allowed customers to customize their ots tune. I have not heard of any progress on this

Do you know if there has been some progress? I would like to get BM3 and run OTS map but the additional features are quite important to me.

It looks like disabling cold start, enabling rev match with DSC off, is configurable with OTS maps but no custom throttle mapping which is one of the main reasons I would like to tune the car.

[David.m]

Originally Posted by mr_lab_rat

Do you know if there has been some progress? I would like to get BM3 and run OTS map but the additional features are quite important to me.

It looks like disabling cold start, enabling rev match with DSC off, is configurable with OTS maps but no custom throttle mapping which is one of the main reasons I would like to tune the car.

PTF confirmed with me again only a month or so ago that Custom Throttle mapping is only available via a custom tune (assuming you want it with a tune). They told me a while back I could use the custom throttle feature as a user but only if staying with the oem stock tune.

Getting rid of the Sport+ throttle has made such an improvement to spirited driving. I now just use Sport+ or DSC OFF modes (which I added rev-match) depending on conditions and don't have to worry about re-calibrating the right foot.

[mr_lab_rat]

Originally Posted by David.m

PTF confirmed with me again only a month or so ago that Custom Throttle mapping is only available via a custom tune (assuming you want it with a tune). They told me a while back I could use the custom throttle feature as a user but only if staying with the oem stock tune.

Getting rid of the Sport+ throttle has made such an improvement to spirited driving. I now just use Sport+ or DSC OFF modes (which I added rev-match) depending on conditions and don't have to worry about re-calibrating the right foot.

Thanks, that sucks. I really don't need a custom tune. I wonder if PTF would modify an OTS tune for me for a small fee. I'll ask.

[KevM2]

Originally Posted by D CHOI

Planning to get a DYNO run with Stage 2 93 (100 octance mix with 91) since I'm in the west coast.

-Fabspeed downpipe HJS 200 cel
-VRSF 5" HD FMIC + Chargepipe
-FI catback exhaust

A knowledgable friend told me I should be around 380whp? Anyone have some idea what I should be pushing?

I'm very curious if you ended up getting a dyno and what it showed. I have the same exact bolt ons and deciding if i should go ahead with stage 2 BM3. But I only have access to octane 91.

Are you happy with how the car feels? Any issues/codes/weird noises etc?

[D CHOI]

Originally Posted by KevM2

I'm very curious if you ended up getting a dyno and what it showed. I have the same exact bolt ons and deciding if i should go ahead with stage 2 BM3. But I only have access to octane 91.

Are you happy with how the car feels? Any issues/codes/weird noises etc?

Stage 2 93 feels nice especially at the higher rpms. You can feel the small difference between 91 vs 93. The higher octane mixing with 100 is addictive. I noticed a very small lag if I dont run stage 2 because of the intercooler.

I've also ran a full 100 octane map and was told that is supposed to be lil over 400whp. I've yet to dyno anything yet.

[KevM2]

Originally Posted by D CHOI

Stage 2 93 feels nice especially at the higher rpms. You can feel the small difference between 91 vs 93. The higher octane mixing with 100 is addictive. I noticed a very small lag if I dont run stage 2 because of the intercooler.

I've also ran a full 100 octane map and was told that is supposed to be lil over 400whp. I've yet to dyno anything yet.

I'm only now learning about bm3, is stage 2 different from their CS or GTS maps? If so, have you tried those? Also, have you upgraded your diverter valve? I'm waiting to try the turbosmart one as I hear it improves any turbo lag

[Anthony1s]

Originally Posted by KevM2

I'm only now learning about bm3, is stage 2 different from their CS or GTS maps? If so, have you tried those? Also, have you upgraded your diverter valve? I'm waiting to try the turbosmart one as I hear it improves any turbo lag

CS and GTS maps are transmission tunes, not engine tunes.

I haven't seen anyone who has upgraded the DV with the stock turbo, because it's a timely install and easier to do if you're swapping the turbo at the same time. But yes, it will improve lag.

[KevM2]

Originally Posted by Anthony1s

CS and GTS maps are transmission tunes, not engine tunes.

I haven't seen anyone who has upgraded the DV with the stock turbo, because it's a timely install and easier to do if you're swapping the turbo at the same time. But yes, it will improve lag.

Ah thanks for that info!! So if mine is a MT I should just choose stage 2 and will be good to go?

I've seen some videos on YouTube of the DV being done at the same time as the IC and charge pipes and they say the trickiest part is accessing the 3 bolts for the DV, otherwise it's pretty easy. They also say the stock one is prone to having some boost leaks

[K_C_]

Originally Posted by KevM2

Ah thanks for that info!! So if mine is a MT I should just choose stage 2 and will be good to go?

I've seen some videos on YouTube of the DV being done at the same time as the IC and charge pipes and they say the trickiest part is accessing the 3 bolts for the DV, otherwise it's pretty easy. They also say the stock one is prone to having some boost leaks

I DIY my own GFB DV and all I can say is, the most effective way to access the top bolt of the DV is to loosen the coolant pump. You don't have to release any coolant to do that.

[Fedorov]

Originally Posted by Fedorov

Thx man, yes I sort of suspected the log to be a bit dry of useful information..
I will get back with logs when I get my new charge pipe.

Finally got the charge pipe installed by a reputable shop and the mechanic said that the clamp holding the air filter pipe was on a bit skew.

Now, the whistling sound is gone which is good. But I won't know if it was because any defect in the stock charge pipe or the skew clamp.. No visible damage to the stock pipe though so probably the skew clamp making the intake air cause a whistle..

[D CHOI]

To clarify the lag I feel is mainly down low in the rpms. I think naturally with a bigger intercooler that will happen so being on the stage 2 helps it. As u guys know with stock tune the turbo runs out of breath up top but with the IC and tune its a decent pull to redline.

[proTUNING Freaks]

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[proTUNING Freaks]

UPDATE:
https://f87.bimmerpost.com/forums/sh....php?t=1834773

[MONSTAR]

Ive been on ACN 91 stage 1 tune since November of last year. Updated in January with 5.9.

No problems until this week. I've only been driving once or twice a week since tuning. I noticed Monday on my way to work (transitioning back into the office) that when I stepped on it, I got a little stutter/break up while in boost. I thought maybe it was my low fuel (1/4 tank) and possibly old fuel (probably about a month since my last fill up). On the way home, I filled up but the station is right next to home so I didn't really drive afterwards.

Today I had an errand to run and once warmed up, I had hit the gas and keep getting that same stumbling and breaking up feeling. I don't know how else to describe it. Maybe misfire? It used to pull great with 0 issues. The car only has 13k miles. No errors came up.

Mods are: VRSF catless dp, VRSF 6.5" intercooler, VRSF charge pipes, Turbosmart VR11 diverter valve, MST v2 inlet, dinan intake, dinan axle back.

I guess for any type of help, I need to run some logs. What is preferable when logging..3rd gear WOT for the full gear? (6MT)

My only thoughts are either spark plugs (originals; about 1k miles with the tune) or HPFP.

[Dj_Quik]

Originally Posted by MONSTAR

Ive been on ACN 91 stage 1 tune since November of last year. Updated in January with 5.9.

No problems until this week. I've only been driving once or twice a week since tuning. I noticed Monday on my way to work (transitioning back into the office) that when I stepped on it, I got a little stutter/break up while in boost. I thought maybe it was my low fuel (1/4 tank) and possibly old fuel (probably about a month since my last fill up). On the way home, I filled up but the station is right next to home so I didn't really drive afterwards.

Today I had an errand to run and once warmed up, I had hit the gas and keep getting that same stumbling and breaking up feeling. I don't know how else to describe it. Maybe misfire? It used to pull great with 0 issues. The car only has 13k miles. No errors came up.

Mods are: VRSF catless dp, VRSF 6.5" intercooler, VRSF charge pipes, Turbosmart VR11 diverter valve, MST v2 inlet, dinan intake, dinan axle back.

I guess for any type of help, I need to run some logs. What is preferable when logging..3rd gear WOT for the full gear? (6MT)

My only thoughts are either spark plugs (originals; about 1k miles with the tune) or HPFP.

Do you feel the stumble around 5k rpms? Most likely your hpfp dipping. But yeah will need logs to confirm

[tenkies]

For the CA folks any concerns with this new Smog guidelines they are adding to check ECU https://www.carbibles.com/california...his-month/?amp

[steven.dbc]

Originally Posted by proTUNING Freaks

UPDATE:
https://f87.bimmerpost.com/forums/sh....php?t=1834773

Will you guys ever add a full e85 map i seem mhd just did it hoping for an update soon!!