[Eric SS]

I just did mine over the weekend and this is very easy to do on the F30. This is an adapter that is added on to the JB4 Stage 2 so don't bother unless you already have that. The plug is on the back of the fuel rail and is much easier to get to than on the E90/92. All you have to do is take off the engine cover and a piece of styrofoam on the back half of the engine. The styrofoam can be a bit hard to get on and off. Mine ripped in half but it's not a big deal. You can see part of it still on the engine where it ripped. Other than that, just cut the 2 green wires in the JB4 harness and use a wire nut to hold them together.

This mod took about 15 minutes on the F30 platform. The AMP plug is labeled so finding the right hole (21) on it is a piece of cake. Just make sure that you put something below the two tiny nuts that hold the connector together before you unscrew them. One of mine fell off to never be found again. If you have an F30, don't let this mod scare you at all!

If you follow the metal fuel rail back, the plug is attached to the end of it. You can see it is easy to get to. You can see the 1/2 of the foam piece that broke and stayed on the engine. That's not a problem. The other 1/2 still goes right back on.


Here's a little closer shot with the BMS adapter plugged in showing how easy it is to reach.


For $25, it's nice to be able to throw in 50/50 E85/91 and not worry about Map 2 giving me issues and it feels like a different animal compared to Map 1.

[tdizzle]

Nice, I was just saying the other day that the BMS instructions left a bit to be desired. I'd like to see more pictures of the process but your last picture is better than any of the BMS ones of that area I think.

[Eric SS]

Originally Posted by tdizzle

Nice, I was just saying the other day that the BMS instructions left a bit to be desired. I'd like to see more pictures of the process but your last picture is better than any of the BMS ones of that area I think.

Thanks, I thought about taking more photos but the only other photo we need is on Terry's instructions (That I agree are pretty bad. I told him he can use my photos ). Just cut the two green wires in the JB4 harness. Attach the two that go to the sensors together with a wire nut. Attach the two that go to the JB4 with the black wire on the Flex Fuel adapter with a wire nut. Once you take the AMP/DSUB connector apart (2 tiny screws) just push the pin into the correct hole and reassemble the DSUB connector.

There's no need to take apart the cowl to get to the JB4 in the F30 which makes it so nice.

[ppatel223]

BMS directions are written by kids who lack simple knowledge about directions and pictures.

[buildbright]

That fuel rail plug is a mother f!er. Also the foam gets destroyed after you remove it a few times. Great power though. I don't recommend most people run above 40% E85 mix without sending logs to the mad scientist known as Terry.

[JN1]

I'm really surprised instructions and/or anyone is just simply splicing wires and reattaching the connections with a wire nut on a car.

I've always been hesitant to attach any wires that didn't just plug in without soldering. Cars move around too much. That's just me though.

[mikew2069]

Thanks for posting this. I need to do this!

[Eric SS]

Originally Posted by JNLBC

I'm really surprised instructions and/or anyone is just simply splicing wires and reattaching the connections with a wire nut on a car.

I've always been hesitant to attach any wires that didn't just plug in without soldering. Cars move around too much. That's just me though.

I agree 100% with you but my guess is the everyday BMW driver can cut a wire and plug a plug in, but may not have a soldering iron, solder, and shrink wrap laying around. This makes it easier for everyone to do. That being said, I'm going to go home and solder mine today since you brought it up. I didn't even think about it. The wires are inside a loom and pretty tight in there so I don't think people will run into issues if done correctly.

[Eric SS]

Originally Posted by buildbright

That fuel rail plug is a mother f!er. Also the foam gets destroyed after you remove it a few times. Great power though. I don't recommend most people run above 40% E85 mix without sending logs to the mad scientist known as Terry.

Really? I thought the fuel rail was a piece of cake to get to. WAY easier than the E90/92. And yes, the foam sucks. I'm thinking of just keeping it off.

[tdizzle]

Anyone know the technical reason these allow you to use E85? Curious to how it works.

[Eric SS]

Originally Posted by tdizzle

Anyone know the technical reason these allow you to use E85? Curious to how it works.

From what I understand on the other site, the N55 has pretty low maximum fuel trims. This mod allows that to be bypassed so the injectors can inject more fuel than the original DME would ever allow them to do. Since ethanol isn't as efficient, it needs that extra pulse width when you get above a certain ethanol percentage

[tdizzle]

Originally Posted by Eric SS

From what I understand on the other site, the N55 has pretty low maximum fuel trims. This mod allows that to be bypassed so the injectors can inject more fuel than the original DME would ever allow them to do. Since ethanol isn't as efficient, it needs that extra pulse width when you get above a certain ethanol percentage

That sorta makes sense. But it seems like it would require the tune to 'tell' the injectors they're allowed to do that. I never noticed any of the maps being E85 specific.

So running E85 on map 1 would have no effect (power) than running 93? What about map 2 since it's primarily for DPs? Maybe the tune is smarter than that and knows when there is E85 in the mix?

[Eric SS]

Originally Posted by tdizzle

That sorta makes sense. But it seems like it would require the tune to 'tell' the injectors they're allowed to do that. I never noticed any of the maps being E85 specific.

So running E85 on map 1 would have no effect (power) than running 93? What about map 2 since it's primarily for DPs? Maybe the tune is smarter than that and knows when there is E85 in the mix?

On the F30, you can Map 7 with no other mods but a 50/50 mix of E85 and 91 octane no DP, meth, or race gas needed

I actually just did a log this morning with the 50/50 mix on Map 7 and no other mods. Emailed it to Terry and he said it looks good

[tdizzle]

Originally Posted by Eric SS

On the F30, you can Map 7 with no other mods but a 50/50 mix of E85 and 91 octane no DP, meth, or race gas needed

I actually just did a log this morning with the 50/50 mix on Map 7 and no other mods. Emailed it to Terry and he said it looks good

Nice. I'm guessing you should use map 7 with E85 or race gas.

What's the power feel difference between other maps with no other mods? I'd assume map 7 with that E85 would be at least equal to map 2 with DP, maybe more?

[Eric SS]

Map 2 definitely feels stronger than map 1. I just put it on Map 7 this morning and only got on it once to log 3rd gear (Gotta love the 8AT in Sport+. no auto kickdown!) so I don't know the difference yet. In looking at the logs, boost was consistently a few psi higher on map 7 and AFR's looked about the same on both which is a good sign.

[tdizzle]

Originally Posted by Eric SS

Map 2 definitely feels stronger than map 1. I just put it on Map 7 this morning and only got on it once to log 3rd gear (Gotta love the 8AT in Sport+. no auto kickdown!) so I don't know the difference yet. In looking at the logs, boost was consistently a few psi higher on map 7 and AFR's looked about the same on both which is a good sign.

Map 2 has more boost so I'd guess it would feel quite a bit stronger, same with Map 7, although map 2 > 7 may not be as noticeable than map1 > 2.

I guess my question was how the E85 and different maps work. Is Map 2 (and flex fuel wires), which is adding boost over map 1 realizing the different fuel and utilizing the cooling features/higher octane of E85? The notes didn't seem to indicate that, but maybe it does.

Just wouldn't want to be running Map 2 without DPs and E85 mix only if that isn't safe. It looks like Map 7 does definitely utilized higher octane fuel.

I guess if I really understood what the tune and flex fuel wires were actually doing... Ahh nerd problems.

[Eric SS]

Originally Posted by tdizzle

Map 2 has more boost so I'd guess it would feel quite a bit stronger, same with Map 7, although map 2 > 7 may not be as noticeable than map1 > 2.

I guess my question was how the E85 and different maps work. Is Map 2 (and flex fuel wires), which is adding boost over map 1 realizing the different fuel and utilizing the cooling features/higher octane of E85? The notes didn't seem to indicate that, but maybe it does.

Just wouldn't want to be running Map 2 without DPs and E85 mix only if that isn't safe. It looks like Map 7 does definitely utilized higher octane fuel.

I guess if I really understood what the tune and flex fuel wires were actually doing... Ahh nerd problems.

My guess is it won't matter on map 1 and 2 since they have set parameters. You really don't need this at all for either of those maps because you can run up to E30 without it. That's enough to run map 2 if you only have access to 91 octane and not 93 octane. It will be more beneficial once they come out with map 5 for the F30 which is the autotune map. That's what map I'll be running when it's released

[RollingLower42]

I already got stage 2 and run map 2 all the time. I do not have the flex fuel wires yet. But basically if I were to upgrade with the flex fuel wires, I will be able to run a mixture of E85?

Also, if I were to upgrade the flex fuel, i would have my shop do the install. I do not trust myself with engine, wires and what not when it is not my specialty..

[tdizzle]

Originally Posted by RollingLower42

I already got stage 2 and run map 2 all the time. I do not have the flex fuel wires yet. But basically if I were to upgrade with the flex fuel wires, I will be able to run a mixture of E85?

Also, if I were to upgrade the flex fuel, i would have my shop do the install. I do not trust myself with engine, wires and what not when it is not my specialty..

Yes.

I hope you have HFC or Catless DPs if you're running Map 2 though.

[Nickf10]

What map are u guys running with downpipe stage 2 jb4 and 50/50 e85/93 ? Terry told me to run map 5 and I saw someone on the forum say its not developed?

[tdizzle]

Originally Posted by Nickf30

What map are u guys running with downpipe stage 2 jb4 and 50/50 e85/93 ? Terry told me to run map 5 and I saw someone on the forum say its not developed?

Map 5 isn't developed yet for the F30 N55. It is for the N54 and possibly the E9X N55, not sure on the E9X N55s though.

Did terry know you were asking about the F30?

[Eric SS]

Originally Posted by Nickf30

What map are u guys running with downpipe stage 2 jb4 and 50/50 e85/93 ? Terry told me to run map 5 and I saw someone on the forum say its not developed?

Run map 7 until map 5 is ready