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THIS PART IS LEGAL FOR USE ONLY IN COMPETITION RACING VEHICLES AS DEFINED UNDER CALIFORNIA LAW, AND IS NOT LEGAL FOR USE IN ANY OTHER MOTOR VEHICLE. California law defines a "racing vehicle" as "a competition vehicle not used on public highways." (Calif. Health & Safety Code 39048) This part may only be used on competition racing vehicles operated exclusively on a closed course in conjunction with a sanctioned racing event. Competition-only motor vehicles may not be driven to a racing event on a public highway and must be transported on a trailer or other carrier. USE OF THIS PART IN ANY OTHER VEHICLE MAY SUBJECT YOU TO FINES AND PENALTIES FOR VIOLATION OF FEDERAL AND/OR STATE LAW, WILL VOID YOUR WARRANTY FROM BURGER MOTORSPORTS, INC, AND CAN VOID YOUR VEHICLE'S WARRANTY. It is your responsibility to comply with all applicable federal and state laws relating to use of this part, and Burger Motorsports, Inc hereby disclaims any liability resulting from the failure to use this part in compliance with all applicable federal and state laws.
Order Here: https://burgertuning.com/products/jb...for-subaru-wrx
Install guide: http://www.jb4tuned.com/instructions/WRX_JB4_Guide.pdf
BMS Intake Testing: https://www.jb4tech.com/forum/model-...686#post815686
JB4 Map Guide:
Map0: Fully disable JB4
Map1: +3psi peak over stock, default map, suitable for all fuels.
Map2: +4psi peak, suggested for 93 octane or higher
Map3: +6psi peak, suggested for 30% E85
Map4: +7psi peak, suggested for 30% E85 along with bolt on modifications
Map5: +7psi peak, no boost taper, more aggressive version of map4.
Map6: User adjustable by RPM map on user adjustment page, values are peak boost over stock by RPM under heavy throttle.
Map7: Progressive WMI mapping, under development
Default Settings:
User Adjustment:
Fuel bias is used to adjust the MAF offset which impacts both the air/fuel ratio and peak timing advance. For those with aftermarket intake systems sometimes fuel bias needs to be lowered to richen the air/fuel ratio. If needed you can lower across the board in increments of 10-20 until AFR at full throttle, higher RPM, is in the 12s. Note with v6 and newer firmware, default fuel bias settings are 80 across the board, and levels below 50 provide a "negative" offset giving additional tuning flexibility that was not possible in earlier firmware.
Open loop can be set to 30 by those running E85 mixtures and/or aftermarket intakes. Open loop is used to adjust the fuel trims by altering the fuel pressure reading. A higher level increases fuel pressure and lowers fuel trims. Going too high will trigger false alarm fuel pressure codes. For those running pump gas and the factory intake, the default setting of 0 is fine.
For those who want to reduce wear and tear when launching boost by gear can be enabled. Setting boost reduction 1st (called max boost 1st in older interfaces) to 3psi will reduce the JB4 boost target by 3psi in 1st gear when launching.
For those who have installed the optional EWG connection FF can be used to scale up and down WGDC to drive boost up to target. The default setting of 50 can be incremented in values of 5 as desired. If you prefer to make adjustment by engine speed duty bias can also be adjusted up and down to provide a similar effect.
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