BM3 Stage 2 currently, Switch to BEF with JB4?

MINERALGREY_F80M3 · 10-15-2020, 10:48 AM

As the title shows, when I purchased my 15 M3 the previous owner had a JB4 installed. I was running Map2 with an E50 mix for a while and then switched to BM3 to run their Stage 2 map 93.

The car feels great, I am just curious if I am missing out by not taking advantage of the fact that I have the JB4 still installed. Would I benefit more from running the E85 BEF through my BM3 so I can run a E50 mix, or is there really no benefit/difference noticeable between the two?

Very new to JB4's/BMW, Honda guy here so sorry for the noob questions!

dcpatters · 10-15-2020, 12:01 PM

JB4 + BEF on E85 would make some really good power. There are options for custom tunes from a BM3 tuner. But with what you already have, the JB4 flashed with a BEF via BM3 would be an alternative. Go full E85 though.

MINERALGREY_F80M3 · 10-16-2020, 08:13 AM

Quote:

Originally Posted by dcpatters

JB4 + BEF on E85 would make some really good power. There are options for custom tunes from a BM3 tuner. But with what you already have, the JB4 flashed with a BEF via BM3 would be an alternative. Go full E85 though.

Cool! I'm going to do a little more research before making the switch. The reason I wanted to go E50 was in the event I do not have a E85 station near by I could pump some 93 in.

Car is on the stock Crank Hub so I also dont want to push it THAT much more. I guess I just like the idea of running the E50 haha

MINERALGREY_F80M3 · 11-03-2020, 11:13 AM

With BM3's news of a release for map switching I began to think on the following set up:
Map1 Stage 2 BM3 93 Map
Map2 Stock CS map with JB4 on MAP2 and E50 mix
Map3 Full stock map

Would be interested to run back to back the car on the JB4 Map2 E50 mix vs 93 Stage 2 BM3

That would really settle the debate for me

Houck1224 · 08-01-2021, 12:01 PM

If you're looking for a jb4 with Bluetooth I have one for sale

10-15-2020, 10:48 AM	#1
MINERALGREY_F80M3 Private First Class 103 Rep 177 Posts Drives: BMW M3 - F80 Join Date: Jun 2019 Location: MIAMI, FL iTrader: (0)	BM3 Stage 2 currently, Switch to BEF with JB4? As the title shows, when I purchased my 15 M3 the previous owner had a JB4 installed. I was running Map2 with an E50 mix for a while and then switched to BM3 to run their Stage 2 map 93. The car feels great, I am just curious if I am missing out by not taking advantage of the fact that I have the JB4 still installed. Would I benefit more from running the E85 BEF through my BM3 so I can run a E50 mix, or is there really no benefit/difference noticeable between the two? Very new to JB4's/BMW, Honda guy here so sorry for the noob questions!
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10-15-2020, 12:01 PM	#2
dcpatters Lieutenant 250 Rep 446 Posts Drives: 2017 BMW M4 Join Date: Dec 2015 Location: Laguna Hills, CA iTrader: (2)	JB4 + BEF on E85 would make some really good power. There are options for custom tunes from a BM3 tuner. But with what you already have, the JB4 flashed with a BEF via BM3 would be an alternative. Go full E85 though.
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11-03-2020, 11:13 AM	#4
MINERALGREY_F80M3 Private First Class 103 Rep 177 Posts Drives: BMW M3 - F80 Join Date: Jun 2019 Location: MIAMI, FL iTrader: (0)	With BM3's news of a release for map switching I began to think on the following set up: Map1 Stage 2 BM3 93 Map Map2 Stock CS map with JB4 on MAP2 and E50 mix Map3 Full stock map Would be interested to run back to back the car on the JB4 Map2 E50 mix vs 93 Stage 2 BM3 That would really settle the debate for me
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08-01-2021, 12:01 PM	#5
Houck1224 First Lieutenant 57 Rep 366 Posts Drives: 2018 440ix gc Join Date: Dec 2019 Location: Albany, NY iTrader: (1)	If you're looking for a jb4 with Bluetooth I have one for sale
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