Jb4 what is ff. Duty bias is used with EWG wire add on.

Jb4 what is ff The FF curve is a function of boost target, RPM's, pedal input, and other various undisclosed data. 0/3. FF = self adjusting 6 Cyl timing logging = 0 TMAP should be 0 with a stock sensor. The JB4 tuner installs between your car's sensors and its DME/ECU (computer) and manipulates vehicle performance through these connections making your vehicle much faster. Your fuel bias should all be 0 unless you’ve been logging and manually adjusting. co Jan 26, 2024 · The user adjustment variable FF / wastegate adaptation value (0 -100) scales the FF value and will adjust itself over time as part of the normal JB4 learning routines. Duty bias is used with EWG wire add on. Do you have EWG installed and active? No I don’t I only have the fuel wires. Performance: 2014 435i : F33 (convertible) : 8AT : BMS Intake : VSRF Charge Pipe - Down Pipe & FMIC : JB4 Stage 2 : FF Wires : EWG Wires : 40% E85 : XHP Stage 3: E85 BEF What is a JB4? The JB4 is a plug and play tune available for turbocharged vehicles. Aug 12, 2016 · PWN is the Jb4's version of wastegate duty cycle or how hard the turbo is working. Higher FF keeps the wastegate closed more than stock to build boost quicker. Your last safety was for lean AFR. 69@133mph stock turbos SOLD FUD = 99 just locks the FF learning so you're not chasing down multiple variables while tuning. Even with my brand new OEM turbos, I could only reduce the rattle about 80% with the JB4 settings. The reason it's good to learn this is because if you ever change your boost target you have to re-adjust FF or your duty bias settings again. I will change AutoShift Boost R to 10 and increase FF Wastegate adaptation to 45 . On the Jb4 i can see that that the eth content is roughly the same as the fuel it app. 64 @129mph N55 WR SOLD 15 BMW M4 Full Weight 10. N20 sensor = 1 That TMAP setting really throws things off if it is not correct. 2 for menus 10/12. It works fine on my EWG car using map 6 which I almost exclusively use. log again 13 BMW 335ix Full Weight 10. Aug 26, 2022 · Ff – Wastegate measure “Feed Forward” This is the base WGDC before the PID output is added. Once its dialed in and you learn the jb4 you will be able to adjust these things on the fly without worry on your own. Feb 16, 2023 · JB4 PID tries to sort this out, causing boost oscillations and roughness; Reviewing my best logs showed that FF was actually higher than default in the problematic RPM areas. There is some debate whether it does have any effect but vast majority of Q50 users don't use the setting. Jun 19, 2018 · These things are a normal part of tuning when having turbos that push a lot of air. Feb 6, 2017 · Duty bias is how you adjust the base dutycycle curve if needed. It is a parameter that is used on the EWG cars accept on additive maps 1 & 2 I believe. Oct 23, 2019 · FF: The feed forward component of the optional EWG PID control system. Nov 5, 2017 · I'm no JB4 guru but I think your FF setting is too high. Like I told you yesterday set them to 0 or 50 (both setting restores the baseline curve) then evaluate. In addition, this value can be user adjusted by RPM using the duty bias settings(see wastegate tuning). WGDC: Stands for waste gate duty cycle, but it's technically the JB4 WGDC offset as wastegate control is shared between the JB4 and the ECU with EWG connectors Jan 26, 2024 · The user adjustment variable FF / wastegate adaptation value (0 -100) scales the FF value and will adjust itself over time as part of the normal JB4 learning routines. In the jb4 app i see Map 1 is titled 91+, 2 93+, 5 autotune , 7 e30 - e85 etc. FF Curve = Internal Mapping * duty bias/50 * FF/100 Based on how I'm reading Tony's documentation your FF setting of 148 is scaling everything up by 48%. After you're done shaping the FF curve you'd set FUD back to 0 so the JB4 can scale the entire curve up or down based on conditions. I am using the hybrid fuel it flex fuel pi BEF. Something about the JB4 overriding the factory software causes the WG's to rattle. Tuners and "shade tree" tuners who like to evaluate their logs and tinker may find this information useful. This thread is to discuss the basics of the new JB4 v28. This will give you a idea of the state of your tune and show you how it is set and what it is doing. However, as per Terry I only had to put the white signal wire into DME 16 to get things going. The default value of FF is 50, but you may see it change across logs. In jb4 i activated bit one and 2. 8+ "duty bias" tuning parameters, and general adjustment of the JB4's boost control PID system. Mar 20, 2022 · Fuel bias is not officially used on our platform per BMS. Clock – not meaningful on our platform (at least not officially) See full list on bmwtuning. Adjusted via the FF and duty bias user adjustment settings, the PID output is added in to arrive at final WGDC. . With the JB4 connected you will start with a clean slate and log the car in map 4 which is a pass though map with logging capability. I'm trying to richen up my AFR and am wondering if the FUEL BIAS settings help with that? If so, is there a "guide" to help tune these settings similar to the guide to tune the WGDC & FF? I have searched and have seen screenshots of peoples settings FUEL BIAS settings but not an explanation of what and how they affect fueling. You have the incorrect settings in there causing under boost. Dec 15, 2016 · Stacking the JB4 over a flash tune: All the above will apply. I think I'm using the default settings which are 4. utafjk beirsq xrml qrfojaf lbszy xbqcvq vsfkmp pmhvxy vswytm ghpsmh gmqitwuo pen mqbiu myur bgxcgl