How to remove the speed limit on Dongfeng Tianjin KR?
3 Answers
Method to remove the speed limit on Dongfeng Tianjin KR: The speed limit of Dongfeng Tianjin's electronically controlled fuel injection engine has a lead seal, which can be removed by dismantling it. The following is a related introduction to Dongfeng Tianjin KR: 1. Dimensions: The overall external dimensions are 10980X2500X3850mm, with a wheelbase of 2000+5000mm, and the tank size is 8100X2500X2250mm. 2. Tank body: The tank body is made of high-quality carbon steel plate conforming to national standards. The vehicle is equipped with 3 augers, driven by three 5.5KW motors. The top auger is hydraulically controlled for lifting and can rotate 180 degrees. The tank body is divided into 4 independent compartments, allowing independent control of the unloading sequence and speed for each compartment.
I've been driving trucks for over a decade and helped many fellow drivers deal with speed limiter issues. The Dongfeng Tianjin KR comes with factory-set electronic speed limiters mainly for transportation safety. To remove it, you'll need to visit a professional ECU tuning shop where they'll use diagnostic equipment to modify parameters in the vehicle's computer. But be warned - after removal, fuel consumption will increase significantly, engine load will rise making overheating likely, and braking distance will lengthen. I've seen many cases where speed limiter removal caused premature failure of rear axle gears - the gains aren't worth the losses. If you really need temporary removal, some repair shops can provide temporary unlocking, but you'll need to sign a liability waiver. For regular cargo transport, 90 km/h is usually sufficient - safety should always come first.
The two Tianjin KR trucks our fleet purchased last year have both had their speed limiters removed. Just take them to a repair shop where they can use a diagnostic tool to access the engine system and modify the maximum speed parameter. However, after the modification, the acceleration does become noticeably faster, so you need to be more careful with the throttle. Remember to recalibrate the transmission program after the modification, otherwise, the gear shifts will become jerky. It's also a good idea to check the tires when modifying the vehicle, as the factory tires are only rated for speeds up to around 100 km/h. Once, I drove a de-limited truck in the rain, and the brakes were noticeably less effective on the highway. Thinking back on it now, it's quite frightening, especially when hauling heavy loads—extra caution is necessary.
