Custom tune or MHD?

JonEQuest

Private
Nov 7, 2018
39
16
0
Kenner Louisiana USA
Ride
2008 335i Convertible
I have a 2008 E93 N54, rebuilt recently with 17t's, catless DP and exhaust, 2" inlets and outlets, index 12 injectors, Eldor coils, 2 step colder plugs, etc. I have just installed a 2nd walbro 450 fuel pump, Phoenix intake with PI (750cc injectors) and a BMS injection controller connected to the JB4 that I have had for while. I am trying to decide if I should pay for a custom tune (I was quoted $400) or just use some of the MHD ones for higher stages. If I use MHD, will I have to still custom adjust it? Is it risky to run and adjust an MHD pre-made tune? So far "tuning" for me has been just using map 5 on my JB4.
 

SlowE93

Captain
Jul 2, 2017
1,390
1
761
0
Ride
E93
I have a 2008 E93 N54, rebuilt recently with 17t's, catless DP and exhaust, 2" inlets and outlets, index 12 injectors, Eldor coils, 2 step colder plugs, etc. I have just installed a 2nd walbro 450 fuel pump, Phoenix intake with PI (750cc injectors) and a BMS injection controller connected to the JB4 that I have had for while. I am trying to decide if I should pay for a custom tune (I was quoted $400) or just use some of the MHD ones for higher stages. If I use MHD, will I have to still custom adjust it? Is it risky to run and adjust an MHD pre-made tune? So far "tuning" for me has been just using map 5 on my JB4.
Use a BEF for the JB4.
You can use an OTS BEF and tweak duty bias, fuel bias, etc as needed and you will be fine. If you want it a little more aggressive, go with a custom tune.
My E93 is set up very similarly to yours. I am currently on the BETA firmware which allows map 6,7,8 to be user adjusted vs map 6 only on regular firmware.
 

SlowE93

Captain
Jul 2, 2017
1,390
1
761
0
Ride
E93
OK, thanks. I just got the MHD flasher and didn't realize that. Does $400 sound alright? How does the process work for remote tuning?
400.00. For what ?
A custom tune ??
Does that tuner work with JB4 ??