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  1. N54 MHD Back End Flash Maps - JB4tech.com

    6) The JB4 is widely used and widely supported including free unlocked back end flash maps and custom mapping support from BMS via the n54tech support forum. BMS sponsors and attends …

  2. Jb4 Default settings - JB4tech.com - International Turbo Tuning …

    Oct 4, 2022 · Cant seem to find the default settings for the jb4 can someone send a link. Thanks!

  3. FNG with some questions, results, and install tips (Cadillac CT5-V + JB4)

    Dec 14, 2023 · Last week, I installed a JB4 on my new CT5-V (3.0TT). I drove the car for a week in both highway and city (with a little play time on both) and the car ran flawlessly without any CELs. The …

  4. Boost control by gear, JB4 or MHD - JB4tech.com

    The JB4 boost by gear can be set on the fly in seconds while in the staging lanes, bypassed on the fly for a burnout, and bypassed on the fly if traction is better than expected during a run. Very common …

  5. Tunerpro "how to" - JB4tech.com - International Turbo Tuning Discussion

    jb4 g5 w/n20 tmap & e85 bef bms 2.3 meth w/DO 5 & 7 nozzles Vrsf dp's Ebay chargepipe w/ 2 meth bugs and tial 50 6x6x23 intercooler mmp inlets and outlets E50 mix w/fuel it stg 1 lpp Bosch n55 …

  6. Total Newbie to N54, JB4 and Back End Flash - JB4tech.com

    Aug 17, 2021 · JB4 = piggy back or pass through only, does NOT overwrite the cars computer (ECU/DME). JB4 alters the signals the computer sees so the car ECU alters its behavior. MHD = …

  7. No boost after installing JB4 - JB4tech.com

    Oct 14, 2022 · I recently installed the JB4 in my car. Everything seems like it works because i can use the different setting but I do not get any boost in any of the maps. So then I took the jb4 out and had …

  8. JB4 Menu 4 - 2 Alternative pedal to boost mapping - JB4tech.com

    May 15, 2014 · JB4 Menu 4 - 2 Alternative pedal to boost mapping 05-15-2014, 12:22 PM Hi my friends I am doing a upgrade in my N54 with the Rb Turbos . I already installed the BMS Flash PUMP: For …

  9. JB4 for Acura TLX TypeS Dyno Testing - JB4tech.com

    Sep 21, 2022 · Would the JB4 be able to adjust on the fly for potential knock? Im finishing up a custom short ram this weeked, just waiting for the MAF flange to be delivered. There's a slight size increase …

  10. Lotus Emira (3.5L V6) - jb4tech.com

    Jul 28, 2025 · Installed a JB4 unit in my Lotus Emira 3.5L V6 and testing it out on the local fuel here in Tokyo. As there are no legal requirements to display the octane content at the pumps, I am a bit …