[FastFrog]

Hi all,

So the MHD flexfuel kit for B58 is finally getting available in Europe. I'm considering pulling the trigger, but I've a concern that currently prevents me from doing so, let me explain.
As the readers of the 'B58 log review thread' know, the best results in terms of timing corrections are often obtained with a E content slightly above the map's advertised one. As an example, it's not rare to feed an 'E40 stage 2 HPFP' map with E42 to E45 or even above that. Knowing that, how will flexfull adaptation deal with that extra-added E, for timing smoothing purpose? I mean if I put E45 in, will timing target get higher than it is with E40 maps? If so I would end up having more timing corrections with a flexfuel system than without? That would be more than unfortunate...

I may have missed something here and would greatly appreciate any insight from actual users.
Thanks.

[abbike18]

Havent dealt with this issue myself, so just an idea here. But maybe you could turn the power down a touch? IE if you adjust the power down to 95% in the slider, then maybe the resulting interpolated tune will be a little.more conservative, while still correcting for the differing fuel volumes required.

[B58]

It's the best thing for the B58. I have the MHD ECA and ran it with the ots maps and it worked flawlessly. I'm flex fuel tuned right now on a Pure 800 by Pure Boost and I can pump any where from 91 up to E60 and the tune self adjusts and runs real clean with minimal to no timing corrections.

[johnung]

Originally Posted by FastFrog

Hi all,

So the MHD flexfuel kit for B58 is finally getting available in Europe. I'm considering pulling the trigger, but I've a concern that currently prevents me from doing so, let me explain.
As the readers of the 'B58 log review thread' know, the best results in terms of timing corrections are often obtained with a E content slightly above the map's advertised one. As an example, it's not rare to feed an 'E40 stage 2 HPFP' map with E42 to E45 or even above that. Knowing that, how will flexfull adaptation deal with that extra-added E, for timing smoothing purpose? I mean if I put E45 in, will timing target get higher than it is with E40 maps? If so I would end up having more timing corrections with a flexfuel system than without? That would be more than unfortunate...

I may have missed something here and would greatly appreciate any insight from actual users.
Thanks.

I'm a Bootmod3 user, so I don't know MHD. I would think that it would be a huge benefit to have an ethanol sensor to know exactly what your % is, even if you are running a non-FlexFuel tune. That way you'll know for sure if your E40 tune is really receiving E43, etc.

[FastFrog]

Thanks guys.
You are right to call it a "ECA" instead of a "flexfuel kit" as I did in the thread title. Also, I agree that knowing the exact E content of the tank brings a lot of value in terms of reliability of fueling conditions.
What I'm not comfortable with is how this is managed along with the flex fuel capabilities. Keeping maps at a 95% power capabiltiy might be a good safety measure, although not most optimal performence-wise.

I may stick with "fixed-fuel" OTS maps and simply use the device as a convenient ECA then.

[GrizzyDanglez]

Originally Posted by FastFrog

Hi all,

So the MHD flexfuel kit for B58 is finally getting available in Europe. I'm considering pulling the trigger, but I've a concern that currently prevents me from doing so, let me explain.
If so I would end up having more timing corrections with a flexfuel system than without? That would be more than unfortunate...


Thanks.

I can't answer your exact question on timing, but I can say that I use the MHD ECA flexfuel kit and paired it with a P3 ethanol sensor and I absolutely love it. I can check my ethanol content instantly with the P3 gauge or I can see it through bluetooth on the MHD app. I am super happy with the flexibility this has given me

[dinan5m3]

If we are referring to the following kit from BIMECU,



, then is the kit really as it says, i.e. 100% plug-n-play, no messing with pins, re-pinning, and no harness/cables need to route through firewall, and tap the BDC like it is with Dorch's kit?

With BIMECU, you just plug into the harness in the ECU area, and that's it, and still able to put the ECU cover down?

And talking with BIMECU, i can leverage my existing bluetooth ECA (Fuel-It kit), and just buy BIMECU's electronics only. Of course, this will lock me down to MHD only to use their ECA based tunes with this CAN bus ECA option.




I doubt MG and BM3 supports this MHD flexfuel kit.

[PEREZRAPHAEL]

Originally Posted by B58

It's the best thing for the B58. I have the MHD ECA and ran it with the ots maps and it worked flawlessly. I'm flex fuel tuned right now on a Pure 800 by Pure Boost and I can pump any where from 91 up to E60 and the tune self adjusts and runs real clean with minimal to no timing corrections.

Since you have more experience with the flex fuel sensor can you let me know if I would make the same amount of power on the stage2+ MHD flex fuel tune if I put in E40 as if I was on the regular flash e40 tune. Thanks

[B58]

Originally Posted by PEREZRAPHAEL

Since you have more experience with the flex fuel sensor can you let me know if I would make the same amount of power on the stage2+ MHD flex fuel tune if I put in E40 as if I was on the regular flash e40 tune. Thanks

It should be the same power if anything a bit more because it runs cleaner since its able to self adjust. You have minimal to almost no timing corrections with a flex fuel setup at least with my experience. I always ended mixing around 45% to 50% and I was hitting about 18° of timing advance with the OTS flex fuel map.

https://datazap.me/u/n54tt/b58-stage...29-30-31-32-34

[B58]

Originally Posted by dinan5m3

If we are referring to the following kit from BIMECU,



, then is the kit really as it says, i.e. 100% plug-n-play, no messing with pins, re-pinning, and no harness/cables need to route through firewall, and tap the BDC like it is with Dorch's kit?

With BIMECU, you just plug into the harness in the ECU area, and that's it, and still able to put the ECU cover down?

And talking with BIMECU, i can leverage my existing bluetooth ECA (Fuel-It kit), and just buy BIMECU's electronics only. Of course, this will lock me down to MHD only to use their ECA based tunes with this CAN bus ECA option.




I doubt MG and BM3 supports this MHD flexfuel kit.

This is the correct kit to purchase. Its plug and play. Goes right into the DME connectors and it takes about 10-15 minutes to install it. Here is a video on how to enable it once the kit is installed:

[dinan5m3]

Originally Posted by B58

This is the correct kit to purchase. Its plug and play. Goes right into the DME connectors and it takes about 10-15 minutes to install it. Here is a video on how to enable it once the kit is installed:

Thanks.

Any issue people reported or seeing from having the BIMECU's ECA located in the engine bay?

I'm assuming i'll have the BIMECU ECA located about where my current bluetooth ECA (Fuel-It) is located near the center, toward the firewall/behind the engine.

And the ECU cover can be closed back after the installation to the DME connectors?

Any picture of BIMECU mounted ?

[B58]

Originally Posted by dinan5m3

Thanks.

Any issue people reported or seeing from having the BIMECU's ECA located in the engine bay?

I'm assuming i'll have the BIMECU ECA located about where my current bluetooth ECA (Fuel-It) is located near the center, toward the firewall/behind the engine.

And the ECU cover can be closed back after the installation to the DME connectors?

Any picture of BIMECU mounted ?

The harness is long enough to route the module under the cover and near the brake fluid reservoir area. It does not directly sit in the hot engine bay. Yes the DME cover closes and I'll try to post a picture of how I routed mine some time later.

[GrizzyDanglez]

Originally Posted by dinan5m3

Thanks.

Any issue people reported or seeing from having the BIMECU's ECA located in the engine bay?

I'm assuming i'll have the BIMECU ECA located about where my current bluetooth ECA (Fuel-It) is located near the center, toward the firewall/behind the engine.

And the ECU cover can be closed back after the installation to the DME connectors?

Any picture of BIMECU mounted ?

Mine fits really nicely, I have it on the drivers side of the engine by the brake resevoir, and I spliced my P3 sensor directly into the fuel sensor cable. ECU cover fits snug, but it fits. You would never know I have it until you start taking plastic pieces off. Very straight forward install.

[dinan5m3]

I wonder if possible to splice so that i can keep both my current bluetooth sensor (Fuel-It) and the MHD ECA, both electronically.

[kern417]

I made a video discussing this.

MHD specifically will pull power above e40

Best bet is map switching for performance, flex fuel for convenience

[FastFrog]

Spot on my initial question! Thanks a ton.

[dinan5m3]

Originally Posted by kern417

I made a video discussing this.

MHD specifically will pull power above e40

Best bet is map switching for performance, flex fuel for convenience

Good video, information. I had to replay few times to have all the details sunk in.

Few things i noticed:

a) MHD does have a manual check box that lets the app know that you are "enabling" the CAN bus ECA with the fuel maps.

b) MHD states if CAN bus ECA is enabled then "do not" select E maps in any of the stage fuel maps, including in multi map stage slots.

c) Yeah, if CAN bus ECA is selected for flexfuel "convenience" then map is adjusting to what's "actually" in the tank as the E content rather than non-flexfuel setup of selecting the "apparent" E content map whereas the tank may "actually" have slighter higher E blend to add extra safety headroom, to help compensate for the (crappy) fuel quality.

d) But let's suppose the tank has the E40 blend. I would think that for that given fuel in the tank, between statically selecting E40 map versus letting flexfuel tune "adjust" to E40 blend in the tank, the power output "ought to be" the same. Right?

[dinan5m3]

Hrm,

So the MHD doc says, for the flexfuel, you need to flash multimap.

Which means, flexfuel as the video states, E blend adjusting cannot occur from flashing stage 1, 2 and 2 HPFP pump gas non-E maps.

I stand corrected.

[GrizzyDanglez]

Originally Posted by dinan5m3

I wonder if possible to splice so that i can keep both my current bluetooth sensor (Fuel-It) and the MHD ECA, both electronically.

yes you can

[Freddie07]

Would a B58 kit fit an N55? Both F series.