Supported vehicles › Jac › JS4
Jac · Cars & LCV
Jac JS4 tune files, remaps & software solutions
1 engine · 1 ECU/TCU type · files for Autotuner, KESS3, Flex, Dimsport DFOX / New Genius, PCMflash, MMCFlash, BitBox and more
Custom files for the Jac JS4 built in WinOLS from your own read — not a generic file pulled from a database. Send the read from your tool and Josh builds the calibration for your exact software version, usually back within 10–20 minutes during file-service hours (9am–9pm Mon–Sat AEST), and supports it afterwards. Typical Stage 1 figures are shown per engine below and confirmed per calibration.
Jac JS4 1.5 Тurbo HFC4GB24D petrol
Controllers and read methods
- Delphi MT62.1 AutotunerKESS3FlexDFOXPCMflashbFlashBitBoxOBD
What we build for this engine
- Stage 1 and Stage 2 calibrations built from your read
- Pops and bangs, launch and rev-limit changes where the platform allows
- Catalyst, flap and DTC work
- WinOLS map packs and DAMOS where we hold our own definitions
Jac JS4 FAQ
Do you have a tune file for the Jac JS4?
Yes — for every engine and ECU listed above. Files are built from your own read in WinOLS for your exact software version, not supplied from a generic database.
How do I get a Jac JS4 file?
WhatsApp the read to 0466 659 997 with the engine, ECU, your tool and what you want, or upload it at tacfiles.com for an automated return where a matching project exists.
What gains will a Jac JS4 Stage 1 give?
Typical Stage 1 figures are shown on each engine card above — measured on our dyno where marked, otherwise the typical gain for that engine class. Final numbers depend on the calibration and hardware, so we confirm per file. Reliability comes first — files stay inside what the engine, injectors and cooling handle comfortably.
Send your Jac JS4 read
WhatsApp 0466 659 997 with the engine, ECU, your tool and what you want. Hand-built files typically return in 10–20 minutes during file-service hours (9am–9pm Mon–Sat AEST).
Vehicle, ECU and read-method data compiled from the published compatibility lists of the flashing tools we work with (files are returned for Autotuner, KESS3, Flex, DFOX, PCMflash, bFlash, BitBox and more). Stock figures are manufacturer-published values as listed by those tools and may vary by market. All tuning files are intended for off-road, motorsport, agricultural or commercial use only; it is the responsibility of the vehicle owner to ensure compliance with local regulations.