for the noobs...what do all this things mean?

[imrj]

I know what the ECU and TCU mods are, but not sure about these, more importantly how do they relate (or not!), and what to combine for optimal (or not to ever combine!) ,
Fuel Wires
EWG
VMI
MAP(0,1,2,3)
LAP(#?)

 

[rpoffen]

I know what the ECU and TCU mods are, but not sure about these, more importantly how do they relate (or not!), and what to combine for optimal (or not to ever combine!) ,
Fuel Wires
EWG
VMI
MAP(0,1,2,3)
LAP(#?)

Fuel wires - these are part of the jb4 piggy back tuner, it allows it to modify the O2 sensor readings to trim the fuel ratio.
EWG - Electronic WasteGate - Optional connections to allow the jb4 to modify the signals that control the wastegate on the turbos. Not usually needed until you get into more aggressive tuning.
WMI (not VMI) - Water Methanol Injection - This is actually a very old concept, used quite a bit on military aircraft in WW2 to increase the effective octane of the fuel. Uses a separate tank filled with a water/methanol mix (or up to straight methanol) with a pump, controller, and separate nozzle in the charge pipe. The jb4 has support to drive such a setup.
Map (0,1, 2, etc) - these are the different mappings on a tuner (such as jb4) that have diofferent boost profiles depending on the fuel being used. Map 0 is stock, map 1-5 typically are for increasing octanes of fuel, 91, 93, 93+E30. Map 7 on our platforms enable WMI.
LAP3 - Another maker of tuning products, they have a number of products. Go to lap3usa.com.

 

[imrj]

great that helps....am going to get this JB4, but curious about the high price, in looking at the chips in this tuner it looks like is very old 8-bit chipsets...am a software engineer so am not used to seen these chips for over 15 years now....so the price tag must come from the code

I presume all the tuner is doing is getting input stream from the ECU and then injecting parameters back into the ECU based on its own computed closed-loop I/O logic function(s), not something very difficult to code per say, and nowadays such code could easily run on a $15 esp32 arduino or raspberry pi board, which is a lot smaller, builtin wifi/bt and can do a million other things too......I dont think JB will open source their code, but I wouldnt mind taking a crack at it if there is some Kia documentation or anything that shows how to interface with the ECU (OBD2 protocol I would think)?

 

[rpoffen]

great that helps....am going to get this JB4, but curious about the high price, in looking at the chips in this tuner it looks like is very old 8-bit chipsets...am a software engineer so am not used to seen these chips for over 15 years now....so the price tag must come from the code

I presume all the tuner is doing is getting input stream from the ECU and then injecting parameters back into the ECU based on its own computed closed-loop I/O logic function(s), not something very difficult to code per say, and nowadays such code could easily run on a $15 esp32 arduino or raspberry pi board, which is a lot smaller, builtin wifi/bt and can do a million other things too......I dont think JB will open source their code, but I wouldnt mind taking a crack at it if there is some Kia documentation or anything that shows how to interface with the ECU (OBD2 protocol I would think)?

You are right as in the HW is not that expensive, but surprisingly the connectors that Nate with the stock harness may not be cheap, plus assembly. I figure maybe $100 COGS, but yes the research and development is worth something.
They also give great customer support, Terry at BMS is always super responsive, that’s worth a lot too.
You can sometimes find a used jb4 for sale on the classified section of this forum to save a bit.
Just remember you need better plugs to run higher maps on the jb4
Good luck

 

[imrj]

i found this picture, i see the infineon SoC being updated via SPI pins, looks very familiar.....ill hit up the guy from BMS

 

[cpeckvt]

You are right as in the HW is not that expensive, but surprisingly the connectors that Nate with the stock harness may not be cheap, plus assembly. I figure maybe $100 COGS, but yes the research and development is worth something.
They also give great customer support, Terry at BMS is always super responsive, that’s worth a lot too.
You can sometimes find a used jb4 for sale on the classified section of this forum to save a bit.
Just remember you need better plugs to run higher maps on the jb4
Good luck

Hello, do you have a direct email for Terry? Ando is impossible to deal with, He now says my fuel trim is a bit high, going back and forth with him is not working, he does not listen.

 

[rpoffen]

Hello, do you have a direct email for Terry? Ando is impossible to deal with, He now says my fuel trim is a bit high, going back and forth with him is not working, he does not listen.

Yeah, terry@burgertuning.com
Good luck!