N54Tech.com - International Turbo Racing Discussion
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Na6691 Na6691 is offline
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Default Jb4 bef or mhd flash for pure stage 2 turbo? - 05-31-2020, 05:00 AM

Which option is better jb4 bef or mhd flash for a pure turbo stage 2?
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jpuehl jpuehl is offline
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Default 06-01-2020, 03:17 PM

Quote:
Originally Posted by Na6691
Which option is better jb4 bef or mhd flash for a pure turbo stage 2?
If you have the JB4 then you'll want the JB4 BEF which requires the MHD app to flash. I have a PS2 with JB4 and the JB4 BEF that I'm slowly tuning to work with my setup. It would be nice however if there was a JB4 BEF for a "large turbo" setup like the PS2, but I think once you get away from the stock turbo you'll want/need to tune to the individual setup to get the most out of it because there would be a lot of variables to consider.


Jim
'12 135i DCT N55 : FBO : PS2 : JB4 : MHD BEF
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Na6691 Na6691 is offline
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Default 06-13-2020, 12:45 AM

I have both jb4 n mhd. Just want to know which one will be safer and more reliable until i get a custom tune
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jpuehl jpuehl is offline
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Default 06-16-2020, 10:57 AM

Quote:
Originally Posted by Na6691
I have both jb4 n mhd. Just want to know which one will be safer and more reliable until i get a custom tune
If you plan to go with a custom tune and not use the JB4 afterwards, just use the JB4 and don't worry about the BEF. The JB4 has lots of safeties so it won't hurt using just the JB4. Adding the BEF will help if run better.


Jim
'12 135i DCT N55 : FBO : PS2 : JB4 : MHD BEF
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schmidty335i schmidty335i is offline
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Default 06-17-2020, 05:49 PM

If you plan on using meth hands down BEF!


2012 335i M3 Kombi, FBO, JB4, BMS meth kit with direct port injection, Spool Performance FX-150 HPFP, Stg2 LPFP, Mfactory SMFW, PS2 w/ inlet and GFB DV
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Na6691 Na6691 is offline
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Default 06-17-2020, 05:51 PM

No meth or pi
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blackhat75 blackhat75 is offline
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Default 07-15-2020, 06:28 AM

Quote:
Originally Posted by Na6691
No meth or pi
You're running a PS2 w/o meth/PI? Are you running straight E85 or race gas then?
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KevinC39 KevinC39 is offline
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Default 07-15-2020, 11:29 AM

Quote:
Originally Posted by blackhat75
You're running a PS2 w/o meth/PI? Are you running straight E85 or race gas then?
You don't need any of that just because you swapped the turbo. You'll need it if you really want to push it but it's not a requirement.
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Na6691 Na6691 is offline
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Default 07-15-2020, 06:58 PM

93 for now until i upgrade my hpfp than e50.
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cmcacmca75 cmcacmca75 is offline
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Default 07-18-2020, 10:24 AM

I use a ps2 up to 24 psi. No need for pi or meth. I add wmi for cooling and yes there is added fueling, but running E30 wound be enough.

Ots, or jb4 bef it doesn't matter, the jb4 gives great advantage over either one. I have an ethanol ps2 ots from mhd and produced just under 600ftlbs and 500whp on my 2013 535iXdrive. Trying a custom tuner now but there is no improvement over my 3.5 sec 0-60 time, or 11.6 sec 1/4 mile time. It's about your setup and with a pwg ps2 and a max 24psi this is where I'm ps2 bound. I'm playing with tuner pro now to see if i can system my upper rpm torque on the Burger Motorsport supplied E85 bef.

Pure Turbo Stage 2
Custom large turbo intake
Turbosmart V9 Diverter
Mamba Actuator
VRSF Chargepipe
AR ******* ********
JB4 map , 25psi target
MHD PS2 E30 Beta
N20 3.5Bar TMap
walbro 450 lpfp
precision raceworks coils MSD super conductor wires
NGK 1-Step colder, .020"
k&n air filter, stock air box
BMS WMI BM10, 55/45 MIX
Flex Fuel sensor, E35
VRSF large intercooler
XDI-35 HPFP
xHP stage 3
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blackhat75 blackhat75 is offline
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Default 07-18-2020, 12:01 PM

Did you miss something from your list? I know you did
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