Tamiya Mini 4WD Basic Knowledge

Mini 4WD Basic Knowledge

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You can enhance the performance of your Mini 4WD by using many of Tamiya's upgrade parts, which can provide increased power or faster speeds. In order to do this, you will need to understand the basic elements of Mini 4WD vehicles.

1. Motor

The installation of a tune-up motor is the best way to increase the speed of your car. There are seven kinds of motors available as upgrades. All of them achieve higher performance than the standard motor included in the kit. It is essential to select the right motor since some are designed for top speed, while others are geared more for cornering.

2. Gear Ratio

At a given motor's output, top speed and acceleration are determined by the gear ratio. In comparison, between a 4:1 gear ratio and a 5:1 gear ratio, the smaller 4:1 ratio is more suitable for speed oriented circuits, while the bigger 5:1 produces more acceleration.

Performance Differences Among The Various Gear Ratios

Different gear ratios are available for all chassis. Use a small ratio for high speed courses and a bigger one for technical courses with many curves and downs. Set up the gears according to the track you are racing on.

3. Tires

Tires play an important part when it comes to your car's performance. Take into consideration tire weight, diameter, and width, to determine what type of tire will work best for the course you will be running.

Difference in Diameters

Small Diameter: Good for a quick start, but not for top speed. Small diameter tires lower the center of gravity and help your car corner better.

Large Diameter: Good top speed and suitable for long straights. Better shock absorption for bumpy course joints.

Difference in width

Wide Tires: Provide stability during cornering. Good for technical courses with banking curves and ups and downs.

Narrow Tires: Good for long straights. Less drag on the motor, which may give the advantage of longer run times.

Difference in Material

Rubber:: Weighs more than the sponge type, but grips better. Useful for jumps and lower center of gravity.

Sponge: Weighs less than rubber type, but has a lower grip characteristic.

Reston: Lighter than the regular sponge type and has better gripping. Can be used on all kinds of wheels.

Tire Maintenance

Use transparent tape to clean your sponge tires. Clean rubber tires with an eraser and remove the eraser pieces with tape.

4. Wheels

Wheels, as well as tires, play an important role in tuning up your car. There are various types with different diameters and structures. Select the right one for your application. Most types can be used on any Mini 4WD; however, if you have a Fully Cowled Mini 4WD, body modification will be required if you use anything other than the standard, small-diameter type wheels.

Type of Wheels

Small Diameter Type: Narrow Wheels (which are standard for the Fully Cowled Mini 4WD), Wide Super Low-Height Wheels and Wheels for semi-pneumatic tires.

Large Diameter Types: Included in a Super Mini 4WD snap kit. A lot of designs are available. Pick one that appeals to you.

One Way Type: Light One Way Wheels, Wide One Way Wheels, Low Height One Way Wheels, Narrow One Way Wheel.

Normal Wheel vs. One Way Wheel

Normal: The speed of the wheels on both sides of a car is the same. This is good for the straights; however, the outer wheel tends to be dragged during cornering and this may slow your car down. .

One Way: The outer wheel rotates faster than the inner wheel does, which ensures smooth cornering and is preferred for technical courses with many curves. .

5. Rollers

Rollers are a must when racing on walled circuits. Altering the rollers will enable you to set up your car for the demands of any track. Key points in using rollers are their size, location and angle. Make sure you have clearance between the rollers and the body tires. Any contact will slow your car down or even damage parts. Most races have regulations concerning the number and size of rollers. Also the position and size of the rollers can affect your overall length and width of your Mini 4WD. Check the local regulations to make certain that your car is in compliance before you race.