Jb4 BCM and E85

[Jhenka]

Does anybody on here run their m5's with e85?
If so, what are the pro's and cons?
What map do you run?
How much e85 do you add per tank?
What supporting mods are absolutely required?

I keep reading about people running it on the n/s55's but haven't really heard anybody running it in the n/s63's.

[momos750]

You can run up to 25-30% e85 without modifications. Which is 3-5 gallons on a full tank of 91+.

On a side note, you should monitor your fuel trims to make sure they are safe.

[Mike@N54Tuning.com]

The current S63TU fuel trim situation does not allow for any E85 use unless you also have methanol injection or a back end flash map loaded to lower the fuel trims.

Mike

[KMORGSM5]

Originally Posted by Mike@N54Tuning.com

The current S63TU fuel trim situation does not allow for any E85 use unless you also have methanol injection or a back end flash map loaded to lower the fuel trims.

Mike

Dumb question, you need meth and full tune to properly run E85? Or can you do JB4+BCM with meth and run. E85?

[apexlocator]

I run ~3 gallons/tank of 91, even before I got my tune.

[13M5F10]

I consistently ran about 3 gallons of e85 with a full tank of 93. FBO M5 with flash tune.

[m5james]

I've run 5 gallons at most on a full tank in my X5M...feels slightly quicker but definitely worse mileage.

[Mike@N54Tuning.com]

Originally Posted by KMORGSM5

Dumb question, you need meth and full tune to properly run E85? Or can you do JB4+BCM with meth and run. E85?

With a JB4+Meth you can also run E85 mixtures.

Mike

[mike@x-ph.com]

Originally Posted by Jhenka

Does anybody on here run their m5's with e85?
If so, what are the pro's and cons?
What map do you run?
How much e85 do you add per tank?
What supporting mods are absolutely required?

I keep reading about people running it on the n/s55's but haven't really heard anybody running it in the n/s63's.

BMS does not recommend running E85 with flash and/or meth as Mike suggested.
You can probably start with a very low mix, datalog check your fuel trims and adjust as needed

[LI-M5]

in my car i've literally put about 5-6 gall's e85 in everytime i fill up cause its very easy for me to get!

no dyno to back up but the car was nite/day fassster ! downside was by half tank its was gone and as stated mpg was affected a lil nothing to stop me from doing it !

Ran like this for well over 2 years w out an issue , had a jb4 , rpi scoops , bms drop ins
car was a beast ! my 16 is still bone stock but im sure ill use it again

[MuffinFlavored]

Originally Posted by apexlocator

I run ~3 gallons/tank of 91, even before I got my tune.

Did this do anything for you?

[MuffinFlavored]

Originally Posted by 13M5F10

I consistently ran about 3 gallons of e85 with a full tank of 93. FBO M5 with flash tune.

Why your MSR Stage 3 Tune over JB4?

[MuffinFlavored]

Originally Posted by LI-M5

in my car i've literally put about 5-6 gall's e85 in everytime i fill up cause its very easy for me to get!

no dyno to back up but the car was nite/day fassster ! downside was by half tank its was gone and as stated mpg was affected a lil nothing to stop me from doing it !

Ran like this for well over 2 years w out an issue , had a jb4 , rpi scoops , bms drop ins
car was a beast ! my 16 is still bone stock but im sure ill use it again

Any issues running this setup? Did you put the E85 before you had the JB4?

[Msizzle]

it maxed my fuel trims, def don't recommend without a tune, the but dyno can be very deceptive snd i suggest not doing anything without monitoring logs

[m5james]

It maxed my trims as well, which in turn I've bumped up my FOL to 80 on my JB4 but I still won't run it anymore until I'm either running meth at the same time and/or we get an E85 pump flash like the N54 guys have.

[13M5F10]

Originally Posted by MuffinFlavored

Why your MSR Stage 3 Tune over JB4?

Originally Posted by MuffinFlavored

Why your MSR Stage 3 Tune over JB4?

I had the JB4 and i did not feel like the car was running as efficient as it should and felt like there was more wear and tear happening because of it. The JB4 increases boost and the car does its best to adapt/adjust to accommodate but can only do so much. Switching to a tune was a night and day difference.

Terry with BMS recommends that you pair the JB4 with a backend flash to make the necessary adjustments needed to support the JB4 and make the most efficient power.

[Msizzle]

i think it maxes the the trims on the vast majority of non competition pkg cars, the owners all think it "feels" faster but i think its dangerous. If you want more octane mix a little race gas or use octane booster, at least that won't max the trims.

[ur20v]

Originally Posted by Msizzle

i think it maxes the the trims on the vast majority of non competition pkg cars, the owners all think it "feels" faster but i think its dangerous. If you want more octane mix a little race gas or use octane booster, at least that won't max the trims.

Yep, a lean mxer may give the best power BUT is very dangerous, miss fires and detenations will melt the pistons or break the ring land

[TrevorM3]

Originally Posted by LI-M5

in my car i've literally put about 5-6 gall's e85 in everytime i fill up cause its very easy for me to get!

no dyno to back up but the car was nite/day fassster ! downside was by half tank its was gone and as stated mpg was affected a lil nothing to stop me from doing it !

Ran like this for well over 2 years w out an issue , had a jb4 , rpi scoops , bms drop ins
car was a beast ! my 16 is still bone stock but im sure ill use it again

your car was also always in limp dick mode....

[TheHouseWon]

If pre-LCI you will starve the engine of fuel with too much e85... You would need a tune or meth. LCI models have slightly improved fuel management but it's still better to have a tune.