[B58]

MHD Flex Fuel with E35-E36
Dorch Stage 2 HPFP
ER Catted DP
AFE drop-in-filter
XHP Stage 1

Added another 2 gallons of E in today and was able to get up to E35-E36. Ill be adding in another 3 gallons tomorrow to bring it over 40% and log again, but its def pulling better than being on the original E25-E26. I see more timing advance. Once I get over 40% I'm going to try out the Stage 2+ HPFP tune and compare the difference with the flex-fuel auto adjusting logs.

https://datazap.me/u/n54tt/b58-mhd-f...32-33-34-35-37

[Ciaran2903]

If you are seeing corrections with a flex-fuel map, is there anything you can do to help?

In the log you posted above, there are some corrections. If you increase the E content, the map will get more aggressive so I’m assuming you would still get corrections?

[B58]

Originally Posted by Ciaran2903

If you are seeing corrections with a flex-fuel map, is there anything you can do to help?

In the log you posted above, there are some corrections. If you increase the E content, the map will get more aggressive so I'm assuming you would still get corrections?

You're never going to not get corrections. This has been discussed since the N54 days. A lot of tuners like Ken @ Wedge and BM3 will tell you if you're not getting minor corrections then you're leaving out a lot of potential power. Timing corrections aren't always a bad thing if it's not knock. I run full E85 port on my 335is with charge pipe meth for intake cooling on RB GF turbos pushing 646rwhp with 26 psi and I still get timing corrections. Back to topic, but once I increase the ethanol content to 50% we'll see what happens in the logs and I'll also compare the Stage 2 HPFP E40 tune logs and see how they look. The ideal logic behind the flex fuel kit is having the ability to pump and go without having to worry about mixing all the time or swapping over tunes. So far we know it's working just by seeing the timing increase on the E35 compared to the E25 logs.

This was a post made a while back when people were worried about timing corrections with the N54: https://blog.protuningfreaks.com/201...eliable-power/

[talontdone]

https://www.bootmod3.net/log?id=624c...0b436526bd04ef

Breaking up at 6K....

[B58]

Originally Posted by talontdone

https://www.bootmod3.net/log?id=624c...0b436526bd04ef

Breaking up at 6K....

When is the last time you changed out your spark plugs? It might be a spark plug blow out and that usually happens in the higher rpms with my experience. I believe the stock gap is .030 out the box on the champion plugs and time to time the gap naturally opens when the spark plugs starts to wear out.

[Ciaran2903]

Originally Posted by B58

You're never going to not get corrections. This has been discussed since the N54 days. A lot of tuners like Ken @ Wedge and BM3 will tell you if you're not getting minor corrections then you're leaving out a lot of potential power. Timing corrections aren't always a bad thing if it's not knock. I run full E85 port on my 335is with charge pipe meth for intake cooling on RB GF turbos pushing 646rwhp with 26 psi and I still get timing corrections. Back to topic, but once I increase the ethanol content to 50% we'll see what happens in the logs and I'll also compare the Stage 2 HPFP E40 tune logs and see how they look. The ideal logic behind the flex fuel kit is having the ability to pump and go without having to worry about mixing all the time or swapping over tunes. So far we know it's working just by seeing the timing increase on the E35 compared to the E25 logs.

This was a post made a while back when people were worried about timing corrections with the N54: https://blog.protuningfreaks.com/201...eliable-power/

Here is my log with the 91 Flex Fuel Stage 2 map, mix is at E40. Everything looks good, except Torque limits. Not sure why, it was taken with DSC OFF…

https://datazap.me/u/ciaran2903/flex...48-49-50-51-53

Definitely not as quick as the Stage 2+ E40 map, but MHD said they are releasing Flex Fuel Stage 2+ Maps very soon.

[B58]

Originally Posted by Ciaran2903

Here is my log with the 91 Flex Fuel Stage 2 map, mix is at E40. Everything looks good, except Torque limits. Not sure why, it was taken with DSC OFF…

https://datazap.me/u/ciaran2903/flex...48-49-50-51-53

Definitely not as quick as the Stage 2+ E40 map, but MHD said they are releasing Flex Fuel Stage 2+ Maps very soon.

I have yet to try the Stage 2+ HPFP map. I'm at exactly 40% right now I'll probably give it a go tomorrow just for fun. Are you running the XHP trans tune?

[Ciaran2903]

Originally Posted by B58

I have yet to try the Stage 2+ HPFP map. I'm at exactly 40% right now I'll probably give it a go tomorrow just for fun. Are you running the XHP trans tune?

It’s a great map. Only issue for me is I’m at altitude - can’t quite hit boost target and working my stock turbo pretty hard.

Yes, running xHP and checked the “Manual or xHP flashed 8AT”.

[B58]

Originally Posted by Ciaran2903

It's a great map. Only issue for me is I'm at altitude - can't quite hit boost target and working my stock turbo pretty hard.

Yes, running xHP and checked the "Manual or xHP flashed 8AT".

How much boost does the Stage 2+ E40 map see in general?

[Ciaran2903]

Originally Posted by B58

How much boost does the Stage 2+ E40 map see in general?

18-22psi. I top out at 20psi

[B58]

Originally Posted by Ciaran2903

18-22psi. I top out at 20psi

Interesting. Maxed out stock turbo on the E40 HPFP map? With 17 psi it's already close to 90% WGDC.

[Ciaran2903]

Originally Posted by B58

Interesting. Maxed out stock turbo on the E40 HPFP map? With 17 psi it's already close to 90% WGDC.

Lot’s of people run the map at target. I’m at 1,000m of elevation though, so the turbo has to work harder. The E40 HPFP map is a touch too much

[IMS-340C]

Interesting, timing increased while boost almost the same.

Originally Posted by B58

MHD Flex Fuel with E35-E36
Dorch Stage 2 HPFP
ER Catted DP
AFE drop-in-filter
XHP Stage 1

Added another 2 gallons of E in today and was able to get up to E35-E36. Ill be adding in another 3 gallons tomorrow to bring it over 40% and log again, but its def pulling better than being on the original E25-E26. I see more timing advance. Once I get over 40% I'm going to try out the Stage 2+ HPFP tune and compare the difference with the flex-fuel auto adjusting logs.

https://datazap.me/u/n54tt/b58-mhd-f...32-33-34-35-37

[B58]

Originally Posted by IMS-340C

Interesting, timing increased while boost almost the same.

Boost figures are based on the Stage 2 ots. They are working on releasing the flex fuel Stage 2+ HPFP map so I'm sure that one will have more boost when you go under the multi map selection. It sounds a bit confusing as I was confused myself, but its slowly starting to make sense.

Originally Posted by Ciaran2903

Definitely not as quick as the Stage 2+ E40 map, but MHD said they are releasing Flex Fuel Stage 2+ Maps very soon.

[IMS-340C]

I have to correct Ken's statement: if you're not getting minor timing corrections WHILE HAVING GOOD TIMING ADVANCE you're leaving potential power.

Originally Posted by B58

You're never going to not get corrections. This has been discussed since the N54 days. A lot of tuners like Ken @ Wedge and BM3 will tell you if you're not getting minor corrections then you're leaving out a lot of potential power. Timing corrections aren't always a bad thing if it's not knock. [/url]

[B58]

Originally Posted by IMS-340C

I have to correct Ken's statement: if you're not getting minor timing corrections WHILE HAVING GOOD TIMING ADVANCE you're leaving potential power.

Lets keep IAT out of this, but has anyone tested a open filter intake and the closed stock air-box with a drop in filter to see if it helps the turbo WGDC drop?

[Jnat]

My latest log of MHD E40 STG2+
Boostane plus E40

https://datazap.me/u/nat/log-1666525...35-36-37-38-47

[B58]

1 more log. Running cleaner with a bit more of ethanol reading around 43-44%

https://datazap.me/u/n54tt/b58-mhd-f...32-33-34-35-37

[B58]

Stage 2 HPFP E40 log file. It still seems to be shy on boost with target. Maybe overall it doesn't like my ER catted down-pipe even though it's a 200 cell.


https://datazap.me/u/n54tt/b58-stage...30&mark=27

[abbike18]

Stage 2 91 BM3 tune. I flashed it a while ago and had come knock in the logs, so reverted to Stage 1. I'm at altitude, and the stock turbo has a lot of trouble hitting stage 1/2 boost levels, so I figured the compressor was just at terrible efficiency and it caused high IATs.

But now that PTF released the max boost slider I was able to bring the Stage 2 tune down by 1 psi to go easier on the turbo and got the following logs.

3rd gear pull with some timing at the beginning but all resolving by redline (redline weirdness is from me not shifting)
https://www.bootmod3.net/log?id=626c...90c66c2a210f28

4th gear pull that's super clean with the exception of cylinder 1.
https://www.bootmod3.net/log?id=626c...0b433ba3a4fcff

Any thoughts are welcome.

[IMS-340C]

Boost relatively low in both maps.

Originally Posted by B58

1 more log. Running cleaner with a bit more of ethanol reading around 43-44%

https://datazap.me/u/n54tt/b58-mhd-f...32-33-34-35-37

Originally Posted by B58

Stage 2 HPFP E40 log file. It still seems to be shy on boost with target. Maybe overall it doesn't like my ER catted down-pipe even though it's a 200 cell.


https://datazap.me/u/n54tt/b58-stage...olo=30&mark=27

[IMS-340C]

Log looks safe but yeah turbo working very hard and also low timing.

Originally Posted by abbike18

Stage 2 91 BM3 tune. I flashed it a while ago and had come knock in the logs, so reverted to Stage 1. I'm at altitude, and the stock turbo has a lot of trouble hitting stage 1/2 boost levels, so I figured the compressor was just at terrible efficiency and it caused high IATs.

But now that PTF released the max boost slider I was able to bring the Stage 2 tune down by 1 psi to go easier on the turbo and got the following logs.

3rd gear pull with some timing at the beginning but all resolving by redline (redline weirdness is from me not shifting)
https://www.bootmod3.net/log?id=626c...90c66c2a210f28

4th gear pull that's super clean with the exception of cylinder 1.
https://www.bootmod3.net/log?id=626c...0b433ba3a4fcff

Any thoughts are welcome.