[Terry @ BMS]

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With the recent release of F series OBDII flashing tools for MHD its time for a central thread for S55 MHD BEF development discussion.

Wireless Flashing Device: https://www.burgertuning.com/product...-flash-adapter


S55 MHD Flash Maps

S55 JB4 BEF Map Designations:

RACE: Suggested for most applications including pump fuels and E85 mixtures up to 40%.
E85: Intended for use on E85 mixtures of 40-60%.
E85_IGN: Intended for use on heavy E85 mixtures 60-100% and features more aggressive timing advance for maximum stock turbo performance.
AL or ANTILAG: Added rolling anti-lag logic, requires JB4 wiring change to activate.

JB4 Map Guide with BEF:

Map0: JB4 fully disabled
Map1: Flash only map with JB4 active for logging/gauges
Map2: 22psi peak absolute target map
Map3: Additive map +5psi tapering to +2psi at redline (same as factory flash)
Map4: Low boost valet map, 11psi absolute target
Map5: //M style map, 13psi down low ramping up to 23psi at high RPM
Map6: Custom tuning map (can be used for absolute or additive based on RPM1500 setting above or below 4psi)
Map7: Race gas map, 28psi peak target
Map8: WMI safety map, profile for stock and larger turbos set based on boost safety above or below 31psi, boost level determined by meth additive and meth flow.

[spammer]

Nice!

[Terry @ BMS]

Working on some updated v13 MHD S55 maps too. Will post when ready wider testing!

[TideMD]

Sweet!!!!!

Count me in for testing those new maps.

[Ldenne123]

Hi if using shell vpower 99ron in the uk should I be using the the pump or race BEF ?
Thanks ..

[Terry @ BMS]

RACE

[Ldenne123]

Okay thanks for reply ive been using the pump is this one only for regular unleaded then
Whats the difference
Thanks mate...

[Terry @ BMS]

This is the S55 thread, sorry. For N55 then yes PUMP.

[Ldenne123]

Okay sorry , so for the n55 running vpower 99ron run on the pump flash is fine
Here's a quick log everything look okay ?
Thanks

[Terry @ BMS]

Use the correct thread for N55 stuff.

[Phlonx]

So glad to have ///M BEF thread!

I think my thread on the support section may be useful to some people that come through here.

http://www.n54tech.com/forums/showthread.php?t=54145

I’ll also take the opportunity to get your feedback on the latest questions I asked:

1. Before going to map 7, I updated the BEF with the latest 08/02/18 release. It seems to have improved partial throttle a little but I'm feeling a hiccup in the 4,500-5,000ish RPM. Attaching logs.

2. On both this BEF and the previous, I'm having trouble when the car is warm only, to start. It cranks and cranks and won't start. After 3 or 4 tries, it eventually starts.

3. I've also noticed the downshifting (DCT) has become less precise. Seems to over rev then engage abruptly, makes for harsh shifts in sport mode. I guess the 100% E85 is pushing other systems in the car a little too far?

[Terry @ BMS]

On the latest JB4 firmware we have an E85 startup option under FUD bit2. Email me for the firmware and you can test it out. We've also reworked the boost by gear, improved map5, and made partial throttle control a lot smoother. Could use some feedback on it!

[Kingofqueenz788]

cable comeing to me and I am mixing my jb4 with the mhd do I need to buy the license for 299 to load map 0

[Terry @ BMS]

Yes, MHD charges $299 for an S55 flash license and then you load the BEF maps we post which are free. No additional expenses from MHD.

[DSCOFF]

Originally Posted by Terry @ BMS

On the latest JB4 firmware we have an E85 startup option under FUD bit2. Email me for the firmware and you can test it out. We've also reworked the boost by gear, improved map5, and made partial throttle control a lot smoother. Could use some feedback on it!

Hi Terry, this e85 start up is on 1.8.4 test 5 firmware? I’ve updated this yesterday and yes definitely smoother and timing in all cylinders more consistent and I’m still on the 11d Bms jb4 s55 bef. I’m still waiting for u to email me the latest bef 😂

This boost by gear improves traction ? Do I need to set max boost values for each gear for it to work or it’s already incorporated? Tx

[Terry @ BMS]

v13 S55 Maps:

1) Adjusted throttle tables on all maps for smoother operation. Very happy with comfort and sport mode but sport+ still needs a bit of work. There is no performance difference between any of the modes, only how responsive the gas pedal is, so feel free to use whatever mode you prefer. We normally leave our cars on comfort for a more linear gas pedal travel.
2) Added E85_IGN maps which features increased timing advance and a leaner air/fuel ratio, for those who are trying to push stock turbo performance to it's limit. Most vehicles can run the latest map5 with these changes on straight E85 which peaks at around 24psi. From 24psi to 27psi (map7) is a crap shoot and depends on weather, how strong your fuel pump is to start with, exact E85 mixture, etc.
3) These post maps superseded all previous test versions of v13 maps that were being passed around in email.

[TideMD]

Hey Terry,
Had a lengthy road trip today that allowed me to get some E85 in the tank, mixed with 93 octane to make E35 blend.

I got a few pulls with the S55 RACE v12 BEF, running Map 5 on latest firmware (1_8_4_TEST10).
Those logs are attached here.

Midway through the trip I received the thread email notification about the new BEF maps, so of course, had to pull over and update to the RACE v13 BEF . I will add those logs in a separate post to help keep things organized.

[TideMD]

Here are the initial S55 RACE v13 logs I got after re-flashing the DME. Other than the updated BEF map, everything else is the same:
- same tank of E35 blend
- JB4 running 1_8_4_TEST10 firmware
- Map 5

[TideMD]

Finally...

I had to refuel, which allowed checking the new BEF using straight pump 93 octane.

One thing I noticed was a surging sensation when gently accelerating at partial throttle. I grabbed a couple logs while this was happening.

All but one of the logs I attached in this and the above posts were obtained in Sport+, DCT set to S3, and MDM (Euro) DSC mode. The other pull was logged while trying Launch Control, just to see how the car handled it with the new firmware and BEF, as well as the new tires.

[DSCOFF]

Originally Posted by Terry @ BMS

v13 S55 Maps:

1) Adjusted throttle tables on all maps for smoother operation. Very happy with comfort and sport mode but sport+ still needs a bit of work. There is no performance difference between any of the modes, only how responsive the gas pedal is, so feel free to use whatever mode you prefer. We normally leave our cars on comfort for a more linear gas pedal travel.
2) Added E85_IGN maps which features increased timing advance and a leaner air/fuel ratio, for those who are trying to push stock turbo performance to it's limit. Most vehicles can run the latest map5 with these changes on straight E85 which peaks at around 24psi. From 24psi to 27psi (map7) is a crap shoot and depends on weather, how strong your fuel pump is to start with, exact E85 mixture, etc.
3) These post maps superseded all previous test versions of v13 maps that were being passed around in email.

Ok tx Terry. Will try them out. Does this mean also that I shouldn’t use Map 6 any longer and just go to Map 7 on E70 at 25psi. Will Map 6 run leaner too with the new v13 bef?

[Terry @ BMS]

The AFR targets will effect all JB4 maps, but you can use map6 or whatever you'd like with them.

[Terry @ BMS]

Originally Posted by TideMD

Here are the initial S55 RACE v13 logs I got after re-flashing the DME. Other than the updated BEF map, everything else is the same:
- same tank of E35 blend
- JB4 running 1_8_4_TEST10 firmware
- Map 5

Thanks! Checking em out now.

Sport+ can be a bit of a problem with the new JB4 partial throttle logic, I have a request in to MHD for a table change I want to adjust it.

Also working on an adjustment to the JB4 side that will also resolve it in a different way. Will post that when ready so you can try it out.

[DSCOFF]

Originally Posted by Terry @ BMS

The AFR targets will effect all JB4 maps, but you can use map6 or whatever you'd like with them.

Ok tx Terry. So just to confirm, if all maps are going to be absolute target maps, what will map 6 target? Will map 6 be user adjustable target defined still like before?

Also, afr will target 14.3 midrange and 13.3 up top for all the maps?

[Terry @ BMS]

Map6 works the same way it worked previously. Enter the target you want.

E85_IGN BEF has mid 14s mid 13s for all maps at full throttle on target boost.

[DSCOFF]

Originally Posted by Terry @ BMS

Map6 works the same way it worked previously. Enter the target you want.

E85_IGN BEF has mid 14s mid 13s for all maps at full throttle on target boost.

So in theory, even at E70, map 6 25psi I should be making more power with the new leaner afr targets?

With leaner afr can I stay with e70 or I need to inc to e85 if boost is at 25psi? Not quite clear on the logic on having leaner afrs except that it means u can run 100% e85 without affecting the fuel pump.