[Lush335]

In a nutshell, why won't the MHD OTS maps work properly with a PS2?

[CoffeeBean]

Originally Posted by Lush335

In a nutshell, why won't the MHD OTS maps work properly with a PS2?

They're designed for the stock turbo which is much different than the PS2.

[Lush335]

Originally Posted by CoffeeBean

They're designed for the stock turbo which is much different than the PS2.

Say you were running stage 2+ FBO on a stock turbo and then just upgraded to a PS2, wouldn't it just be easier for the PS2 to make the same boost without closing the wastegate as much?

[uber]

Originally Posted by Lush335

In a nutshell, why won't the MHD OTS maps work properly with a PS2?

Stock turbos have a narrower powerband than the ps2s, so if you use an OTS tune meant for stock turbos, you will lose out on power from 6000k to redline.

[Lush335]

Originally Posted by uber

Stock turbos have a narrower powerband than the ps2s, so if you use an OTS tune meant for stock turbos, you will lose out on power from 6000k to redline.

Will everything still work properly though or will the DME still try and push the PS2 harder than it should because it still thinks it has the small stock turbo? Sorry if these are noob questions but trying to figure some stuff out.

[CoffeeBean]

Originally Posted by Lush335

Say you were running stage 2+ FBO on a stock turbo and then just upgraded to a PS2, wouldn't it just be easier for the PS2 to make the same boost without closing the wastegate as much?

I couldn't tell you exactly what would happen, but it definitely wouldn't be good. There's so much more to it than I think you realize. This might help: https://www.enginelabs.com/engine-te...-turbocharger/

18 psi from the stock turbo is a lot different than 18 from a PS2. The F series has a separate PS2 OTS map, but unfortunately we don't.

[uber]

Originally Posted by Lush335

Will everything still work properly though or will the DME still try and push the PS2 harder than it should because it still thinks it has the small stock turbo? Sorry if these are noob questions but trying to figure some stuff out.

I don't think I know the full answer to this, but I have seen other forum members run an OTS map as a placeholder waiting for a custom tune. I think you should be okay because MHD tunes based on target engine load, not target boost, so it'll just be an unoptimized tune (missing out on 6k to redline), but you should let more experienced members chime in.

[Jmontans]

Anyone experience this with the new map update?

Flashed the 1.6 map and upped from 1+ to 2+. Put about 250km on the car since then, everything feels good except for a slight throttle oscillation when cruising between 100km/h -120km/h.

It happened twice under these conditions:
If I’m on flat ground (100+km/h) holding throttle input steady, the car feels like it’s almost choking (loss in power) and it’ll keep choking until you add or release throttle - I’ll try logging it next time I’m on the highway.

Not the end of the world, just curious if it’s my car or if someone else has felt the same.

[bimmerfan1972]

Has anyone had issues with the Logging feature of MHD? I find that the Boost (PSI) log does not always work for me. Sometimes it works just fine and I get a good graph, but most of the time it shows that I am at 0.1 Boost the whole time. I was thinking about re-flashing the DME, not sure if that would help.

[Xdrive35i2014]

Originally Posted by Jmontans

Anyone experience this with the new map update?

Flashed the 1.6 map and upped from 1+ to 2+. Put about 250km on the car since then, everything feels good except for a slight throttle oscillation when cruising between 100km/h -120km/h.

It happened twice under these conditions:
If I’m on flat ground (100+km/h) holding throttle input steady, the car feels like it’s almost choking (loss in power) and it’ll keep choking until you add or release throttle - I’ll try logging it next time I’m on the highway.

Not the end of the world, just curious if it’s my car or if someone else has felt the same.

I am getting custom tuned maps from Twisted Tuning. I too feel oscillation at crusing speeds. The oscillation is the most pronouce on steady throttle input going up a hill.

Hopefully this can be resolved down the road.

[FireBlaze]

Can someone tell me what Coolant Target options you have on MHD? I only see Normal, Performance, & Track. I want to set the coolant to 95 degree Celsius but Normal is 105 Celsius and Performance is 85 Celcius (track is 80C). Shouldn't there be a sport option too?

[Ladooo]

Mhd v1.60, my available options are also: Stock, Performance & Track. Set to Performance & temp sits around 98 Celsius most of the time.

Before mhd it was between 110-120c!

[Supermoon]

With the performance coolant target, my fan often blows 100% at stoplights to keep the coolant temperature low.
It's pretty annoying tbh. Did anyone else notice that?
With the old sport coolant target, I only had it happen maybe once or twice a year.
I guess my old radiator is struggling to keep the coolant temperature that low.
Wish MHD added the option, not replace it.

[FireBlaze]

Originally Posted by Supermoon

With the performance coolant target, my fan often blows 100% at stoplights to keep the coolant temperature low.
It's pretty annoying tbh. Did anyone else notice that?
With the old sport coolant target, I only had it happen maybe once or twice a year.
I guess my old radiator is struggling to keep the coolant temperature that low.
Wish MHD added the option, not replace it.

Same issue here. I never noticed the fan running before either. I think the sport coolant target option is missing something. The release notes states there is a 95c option but I can’t get it to work. Under normal target my coolant temp is 225f but performance target it drops to 185f. Before I was at 205f with sport/performance target.

[Lush335]

Originally Posted by uber

I don't think I know the full answer to this, but I have seen other forum members run an OTS map as a placeholder waiting for a custom tune. I think you should be okay because MHD tunes based on target engine load, not target boost, so it'll just be an unoptimized tune (missing out on 6k to redline), but you should let more experienced members chime in.

I was bored so I did a run on Stage 2 ACN91 and boost followed target at 12psi no problem.

I switched to Stage 2+ ACN91, reset load and vanos adaptations and the boost blew past the 16 psi target and went on to over 21 psi and closed the throttle instead. I'll be getting a custom tune at some point anyway but just don't understand why stage 2 would work fine with the PS2 but not stage 2+.

[FireBlaze]

Originally Posted by Supermoon

I pulled this from the updated manual:



I checked my logs and confirmed the new coolant targets are working as intended.
Before the update, my coolant temperature stayed flat at 93c (199f) throughout a WOT pull.

After the update, under WOT, the coolant temperature gradually decreased from 90c (194f) to 85c (185f).

When going WOT in 4th gear, however, the temperature gradually increased from 83c (185f) and it was at 93c (196f) at the end of the pull.
I guess my radiator was being heat soaked due to too much heat

I suspect the hard-running fan issue at a stoplight is coming from the 14c difference between ECO and normal target assuming the old version sport option was targeting constant 95c including the ECO mode.
[EDIT]: I check one of my old logs doing a minute of hot idling. The coolant was staying at 93c (201f) during a minute of hot idling. I'm pretty sure this is the situation ECO mode should kick in so I think it's safe to say the previous sport target was lowering the target temperature for the ECO mode.

How much efficiency is to be had with 109c on ECO mode?
I would rather be less efficient than hearing loud fan noises because the hard running fan at a stoplight reminds me of the day I got stranded due to water pump failure.
The fan noise is one good way to know if the water pump is on its way out so I'd prefer to have the old sport coolant target option back.

Any way to solve this hard running fan issue, please? MHD Tuning

I have a manual transmission so I don't have a Sport button. Is that what Sport mean? Do I need to have a Sport button to access 95c option?

[brooks1005]

Originally Posted by anjuna

This is the OTS map right?

Several users have reported this complaint.

This evening I'll send you a map to try out. Expect it around 8pm CST or so

anjuna Has a fix been created to deal with the oscillation? I'm currently running stage 2+ on a 2013 e92 and it's troubling to feel the car do what is doing.

[FireBlaze]

Originally Posted by Supermoon

6AT sport mode. Pull the shift knob to the left.

Gotcha so manual transmission cars don't get the 95C option. Hopefully MHD adds a sport target coolant option so we can run sport mode all the time.

[FireBlaze]

Originally Posted by Supermoon

No I don't think the type of transmission has anything to do with the coolant target feature.
Sorry I was half awake when I was replying.

What I meant by sport was the sport coolant target option in MHD flash options.
Before the update, it had stock, sport, and track.
After the update, it has stock, performance, and track.

What the update did was managing the coolant temperature dynamically per different driving situation. Before the patch it was targetting a flat temperature.

If you want your coolant at 95c you'll have to roll back to the previous app version.
With the performance option, you should be able to see 85c under WOT.

So if I flash Performance now it should be at 95c with normal driving and go down to 85c when I go WOT?

[Supermoon]

Originally Posted by FireBlaze

So if I flash Performance now it should be at 95c with normal driving and go down to 85c when I go WOT?

Yup

[bimmerfan1972]

Ok, I figured out what is happening with my app. I will start the log, set the phone down, look at it a few minutes later and it has stopped, only logging a little bit. I must be accidentally hitting something and stopping it. Anyone run into this? What is the best way to do this?

[FireBlaze]

Originally Posted by Supermoon

With the performance coolant target, my fan often blows 100% at stoplights to keep the coolant temperature low.
It's pretty annoying tbh. Did anyone else notice that?
With the old sport coolant target, I only had it happen maybe once or twice a year.
I guess my old radiator is struggling to keep the coolant temperature that low.
Wish MHD added the option, not replace it.

I noticed just cruising around no WOT my fan on 100% at stoplights too with performance coolant target setting. Seems unnecessary as the weather outside was 60f outside.