FBL-3 at 22,400rpm

Contained power in short can: the FBL-3 KRAHS motor from MB Slot

The FBL-3 is the KRAHS motor from MB Slot with reference MB-17003. With 22,400 rpm, 178 g/cm of torque, powered at 12 V, and an integrated cooling system, this short can motor is designed to provide a solid balance between top speed and torque, two key parameters when tuning a slot car for a specific track.

Main features

• Speed: 22,400 rpm at 12 V
• Torque: 178 g/cm
• Operating voltage: 12 V
• Format: Short can
• Cooling system: Yes, integrated
• Reference: MB-17003

Recommended applications

The short can format facilitates installation in chassis where space is limited. The 22,400 rpm places it in a performance range suitable for both club circuits with fast layouts and setups aimed at regular competition. The torque of 178 g/cm provides agile response out of corners without compromising stability at high speed.

Whether mounting the motor in a sidewinder configuration (parallel to the rear axle) or inline (longitudinal, in line with the car), the FBL-3 responds well as long as the gear ratio is adjusted to the type of track. For short and technical circuits, a shorter ratio is advisable; for long layouts with straights, a longer ratio will better utilise the rpm range.

Behaviour and performance

The integrated cooling is one of the features that distinguishes this motor during long sessions or in competition where the motor operates continuously. Maintaining controlled temperature extends the lifespan of the windings and contributes to a more consistent response throughout the race or championship.

The torque of 178 g/cm is generous for this rpm range, translating into good traction on the exit and in sections with elevation changes or chicanes where the car needs to regain speed quickly.

Usage recommendations

• Check the condition of the braid before installing the motor: poor contact limits actual performance.
• Adjust the crown/pinion ratio according to the layout: there is no universal combination valid for all circuits.
• Check the motor alignment in the chassis to avoid vibrations that penalise grip.
• Initial run-in recommended at low voltage (6-8 V) for several minutes to settle the braids and optimise contact.

Frequently asked questions

What does "short can" mean in a slot motor?

The short can indicates that the length of the motor is shorter than that of a standard long can. This allows it to be installed in chassis with limited longitudinal space, making it compatible with a wider variety of setups.

Is it suitable for club competition?

Yes. The 22,400 rpm and 178 g/cm of torque place it in a typical range for club competition categories. It is advisable to check the specific championship regulations to confirm that it is homologated in the category you are participating in.

What advantage does the integrated cooling provide?

The cooling helps dissipate the heat generated during continuous operation. This is especially relevant in long sessions or in competition, where a motor operating at high temperatures may lose performance or shorten its lifespan.

What motor configuration can it be mounted with?

The FBL-3 can be installed in a sidewinder configuration (motor parallel to the rear axle) or inline (motor in line with the rear axle). The choice depends on the chassis and the type of track. The provided information does not specify additional mounting restrictions.

What crown/pinion ratio is recommended?

The optimal ratio depends on the layout and type of track. There is no universal combination: for short and technical circuits, a shorter ratio is recommended, while for layouts with long straights, a longer ratio is advisable to take advantage of the motor's rpm range.

The MB Slot FBL-3 KRAHS motor (ref. MB-17003) delivers 22,400 rpm and 178 g/cm of torque at 12 V in a short-can format with integrated cooling. Designed for slot car competition and club racing, it offers a reliable balance between top speed and torque response. Compatible with sidewinder and inline drivetrain configurations, this motor is a solid choice for hobbyists and competitive slot car racers looking for consistent performance on both technical and fast-flowing tracks.

Information not found

It has not been possible to verify with official sources the exact compatibility with specific chassis or the dimensions of the axle or mounting of the FBL-3 motor. If you need to confirm these measurements before proceeding with the installation, we recommend contacting MB Slot directly or reaching out to our team.