Use this table as a quick reference for the lfs rev limiter 6r. (Values approximate for the XR GT Turbo on KY3R).
| Goal | Rev Limiter (RPM) | 6th Gear Ratio (6R) | Final Drive | Result | | :--- | :--- | :--- | :--- | :--- | | Top Speed Run | 8,500 | 0.680 | 3.20 | Huge top end, slow acceleration. | | Short Circuit (No draft) | 7,800 | 0.750 | 3.60 | Never hits limiter on straights. | | Oval Racing (Draft heavy) | 8,200 | 0.720 | 3.40 | Bounces lightly in draft; optimal for passing. | | Fuel Saving | 7,200 | 0.800 | 3.80 | Short shifts; never reaches 6R limiter. |
Installation sits between your engine’s ECU and the ignition/fuel system. The LFS 6R intercepts the RPM signal (typically from the crank position sensor or ECU tach output).
Note: Professional installation is recommended for vehicles with CAN-bus ECUs (most cars after 2010).
Unlike street cars that have a progressive soft-limiter (like a fluttering hesitation), the 6R limiter feels like hitting a brick wall. At 10,500 RPM, power is abruptly cut. The car lurches forward. This is dangerous in corners because the sudden deceleration can shift weight to the front tires, causing a spin.
Developed by Scawen Roberts, Eric Bailey, and Victor van Vlaardingen, LFS is a PC racing simulator renowned for its tire physics and force feedback. Unlike arcade racers, LFS punishes poor throttle control. It is in this unforgiving environment that rev limiter tuning becomes critical.
You will see a list:
Next to Gear 6, you will see a number. In LFS, gear ratios are displayed as a number (e.g., "0.750" or "1.100"). Lower numbers = taller gears (higher top speed). Higher numbers = shorter gears (faster acceleration, lower top speed).
The GTR cars (FZ6, FX6, XR6) are high-consumption vehicles. If you have set your fuel load too low for a race distance, you will encounter this limiter near the end of the race.