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Bostons335i Bostons335i is offline
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Default E85 in NorthEast winter advice - 11-20-2020, 08:40 AM

Hey all ,

I was wondering if some e85 users could help me make a decision on weather or not to run the BMS e85 BEF with e40 through this upcoming winter? My car is a FBO with inlets and a stage 2 fuel pump , and I have been running an e30 mix ever since putting in that stage 2 pump just to help some timing corrections in the summer but still using the pump BEF. Ive read a bunch on this forum and on e90 post that people do run their car in winter but all the people who do seem to live in warmer climates. Im in Boston and we just had a 27 degree day already and on e30 the car had a tough time starting. I herd that many people can fix that by adding fuel to the start up, does the BMS flash have that as well? And just overall is this a safe thing to do on a daily driver with stock turbos? Please shed some light as im pretty confused and conflicted on what to do. The tuner at BMS has told me the only thing with the winter and e85 is a rough start up at times, is that really the only downside? How is daily aspect with the e85? And with e85 in winter in general? E85 users please help !

Ryan
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Bostons335i Bostons335i is offline
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Default 11-21-2020, 05:41 PM

Bump!
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Bostons335i Bostons335i is offline
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Default 11-23-2020, 11:04 PM

no one here runs e85 on their n54? lol
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BeatupVR4 BeatupVR4 is offline
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Default 11-24-2020, 06:28 AM

I'm in NH and we don't have good E85 access so I don't run it and probably never will. My take on it though would be tame back the tune and just run normal pump gas. I have a Forester on studded snows for the winter but also have studded snows on my E60 in case it needs to be driven and I see no reason to have more than stock power for the cold ass months. I had to run map 0 recently for my annual inspection and it'll probably stay on that until spring.
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Bostons335i Bostons335i is offline
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Default 11-24-2020, 06:29 PM

hey thank you for the reply! Yeah im not sure on what to do it seem like everyone on the fourms runs it thru their winters or atleast for when they hit the dyno so im still conflicted
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BMWSwede BMWSwede is offline
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Default 11-26-2020, 03:01 PM

I live in northern Sweden and daily my car on E40 all year.
In winter it can get as cold as -30. (Sometimes even colder)
Cant say i have had any issues at all. But ofc i use an electric pre-heater when it gets freezing.

But even if i forget to use it or have to leave in a hurry, the car always starts. It doesnt always sound happy, but it sure wouldnt on petrol either. ��


2007 E91 335Xi M-Sport MT
FBO W In/outlets
Custom BEF
Stock turbo @ 23psi
E40
440 AWHP
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Bostons335i Bostons335i is offline
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Default 11-26-2020, 03:11 PM

Hey thank you so much for replying! This is really good news to me because i was planning on using e40 with that e85 BEF if i decided to go with it. I was wondering what exactly is a pre electric heater? prob a noob question but had to ask lol!
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BMWSwede BMWSwede is offline
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Default 11-27-2020, 10:35 AM

I use one of these: Find your engine heater DEFA
(Not sure if link works) with connection cabels

There are probably lots of different brands.

Every engine has a different heater and
This heater is mounted on the oilpan to warm up the oil before starting the car. (The entire engine gets a bit warm, starting with the oil)


2007 E91 335Xi M-Sport MT
FBO W In/outlets
Custom BEF
Stock turbo @ 23psi
E40
440 AWHP
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Bostons335i Bostons335i is offline
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Default 11-27-2020, 02:44 PM

Quote:
Originally Posted by BMWSwede
I use one of these: Find your engine heater DEFA
(Not sure if link works) with connection cabels

There are probably lots of different brands.

Every engine has a different heater and
This heater is mounted on the oilpan to warm up the oil before starting the car. (The entire engine gets a bit warm, starting with the oil)
Hey thanks so much for the reply! I might go and try to do without it and if it gets too tough in the cold starts ill go ahead and give it a go. I was also looking more into e85 tunes and saw manny people add fuel for better start ups when cold im wondering if the BMS flash has this ? Hopefully Terry @ BMS or any one @BMS could chime in for this question! thank you again!
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Bostons335i Bostons335i is offline
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Default 11-30-2020, 09:19 AM

bump for some @bms support!
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zach1328 zach1328 is offline
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Default 11-30-2020, 09:24 PM

Can't speak to the BMS flash having anything like that or not.

However, I've run E30-E40 mixes in Colorado year round for the last 6-7 years. Never had any issues starting my N54. It's daily driven and goes up to the mountains often in the winter when temps can easily drop near or below 0F.


2007 335i - JB4 + MHD BEF, RB Twos Plus, BMS DCI, VRSF **, VRSF 7.5" FMIC, VRSF CP w/ TiAL BOV, MMP inlets, VRSF aluminum outlets, XHP Stage 3, TC Kline SA, M3 F/R control arms
2008 535i
N54
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Bostons335i Bostons335i is offline
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Default 11-30-2020, 11:25 PM

Quote:
Originally Posted by zach1328
Can't speak to the BMS flash having anything like that or not.

However, I've run E30-E40 mixes in Colorado year round for the last 6-7 years. Never had any issues starting my N54. It's daily driven and goes up to the mountains often in the winter when temps can easily drop near or below 0F.
Hey ! thank you for the reply ! Just to clarify are you running the BMS e85 BEF?
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zach1328 zach1328 is offline
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Default 12-01-2020, 05:48 AM

Quote:
Originally Posted by Bostons335i
Hey ! thank you for the reply ! Just to clarify are you running the BMS e85 BEF?
I've always run the MHD BEF maps. Switched back and forth some between the pump map for E30 and the E85 map for slightly heavier mixes. I'm now on the Race BEF for hybrid turbos and intend to soon run the E85 map on E50 fuel even in the winter.

I can't imagine the different tunes available would have a huge difference in cold starts on E30 or E40. I'm certainly no expert in that, though. I don't think you should have any issues. Cold weather is a bit harder on batteries too so Id check the basics. Might also just be as simple as the car adapting to the beginning of the colder weather.

Anyways, no complaints on my end from running E85 in the long-run. Haven't had any issues with reliability of the stock fueling system. My stock LPFP even held up on E30-E40 for all this time running 17-19psi. Finally upgrading that since I just got upgraded turbos.


2007 335i - JB4 + MHD BEF, RB Twos Plus, BMS DCI, VRSF **, VRSF 7.5" FMIC, VRSF CP w/ TiAL BOV, MMP inlets, VRSF aluminum outlets, XHP Stage 3, TC Kline SA, M3 F/R control arms
2008 535i
N54
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Bostons335i Bostons335i is offline
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Default 12-02-2020, 09:14 PM

Quote:
Originally Posted by zach1328
I've always run the MHD BEF maps. Switched back and forth some between the pump map for E30 and the E85 map for slightly heavier mixes. I'm now on the Race BEF for hybrid turbos and intend to soon run the E85 map on E50 fuel even in the winter.

I can't imagine the different tunes available would have a huge difference in cold starts on E30 or E40. I'm certainly no expert in that, though. I don't think you should have any issues. Cold weather is a bit harder on batteries too so Id check the basics. Might also just be as simple as the car adapting to the beginning of the colder weather.

Anyways, no complaints on my end from running E85 in the long-run. Haven't had any issues with reliability of the stock fueling system. My stock LPFP even held up on E30-E40 for all this time running 17-19psi. Finally upgrading that since I just got upgraded turbos.
hey ! thank you for all the info! I went ahead and full sent that e85 BEF and filled up with e40. Felt really responsive and felt as though I had a ton more power up top! Took a fast look at the log and saw my HPFP is acting a bit odd (gives a good value than drops than comes back up) so I went and did 3 logs and sent them over to BMS ! hoping my HPFP is not going because I really want to keep the e85 tune!
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Bostons335i Bostons335i is offline
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Default Yesterday, 01:18 PM

Got it all sorted out ! here's the final log with the e85 BEF and e40, also found out on this forum the newest maps from BMS does have systems in place to help with e85 cold starts! Was 37 F here this morning and started up no long crank or anything !

P32_M2_R1_201203_134333.csv
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zach1328 zach1328 is offline
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Default Today, 06:08 AM

Quote:
Originally Posted by Bostons335i
Got it all sorted out ! here's the final log with the e85 BEF and e40, also found out on this forum the newest maps from BMS does have systems in place to help with e85 cold starts! Was 37 F here this morning and started up no long crank or anything !

Attachment 99762
Looks solid. Keep logging on occasion and pay attention to the HFPF pressure. You had a pretty severe drop to about 900-1050psi (6-7 on log) in the mid-range just past 5k rpms. You didn't lean out at all so that's good.

Just keep an eye on things and ensure the HPFP isn't dropping too much and causing the engine to run lean.

Looks good, otherwise. Your cylinder 4 seems to be a little noisy, but that's not too concerning. Rare to get a log without some timing drops, and my cylinder 4 is also a bit noisier than the other cylinders. Always been the case for me and my engine has always run very well, so the cyl 4 timing drops aren't concerning IMO. Just watch those AFRs and HPFP.


2007 335i - JB4 + MHD BEF, RB Twos Plus, BMS DCI, VRSF **, VRSF 7.5" FMIC, VRSF CP w/ TiAL BOV, MMP inlets, VRSF aluminum outlets, XHP Stage 3, TC Kline SA, M3 F/R control arms
2008 535i
N54
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Bostons335i Bostons335i is offline
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Default Today, 06:34 AM

Quote:
Originally Posted by zach1328
Looks solid. Keep logging on occasion and pay attention to the HFPF pressure. You had a pretty severe drop to about 900-1050psi (6-7 on log) in the mid-range just past 5k rpms. You didn't lean out at all so that's good.

Just keep an eye on things and ensure the HPFP isn't dropping too much and causing the engine to run lean.

Looks good, otherwise. Your cylinder 4 seems to be a little noisy, but that's not too concerning. Rare to get a log without some timing drops, and my cylinder 4 is also a bit noisier than the other cylinders. Always been the case for me and my engine has always run very well, so the cyl 4 timing drops aren't concerning IMO. Just watch those AFRs and HPFP.
Hey ! Thank you for that information! Ill try to do a log every week or so like you said just to make sure things are in check! I was told by BMS that map 5 is actually a better map to use with the e85 BEF so I did some pulls and waiting for any revisions if needed ill post that log up!

Im happy to hear that cyl 4 also acts up for you as well because I always noticed that too, even on pump would behave the same exact way !

Thanks again for all the help and support!

P32_M5_R1_201203_222307.csv
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