Fiesta Products 7305 manual Transmission Tuning, Wheels and Tires

TUNING ADJUSTMENTS

TRANSMISSION TUNING

Adjusting the Slipper Clutch

Your model is equipped with an adjustable Torque Control slipper clutch which is built into the large spur gear. The purpose of the slipper clutch is to prevent over-stressing of the drivetrain and transmission gears. It may also be used to regulate the amount of power sent to the rear wheels to prevent tire spin. When it slips, the slipper clutch makes a high-pitch, whining noise.

To adjust the slipper clutch, first remove the receiver box cover. Next, remove the single large hex screw from the motor plate using the supplied 2.5mm wrench. Then rotate the motor and mount to the side of the model. The slipper clutch

is integrated into the main spur gear on the transmission.

The slipper clutch is adjusted using the spring-loaded locknut on the slipper shaft. Use the supplied universal wrench. To tighten or loosen the slipper nut, insert the 1.5mm hex wrench into the hole in

the end of the slipper shaft. This locks the shaft for adjustments. Turn the adjustment nut clockwise to tighten (less slippage) and counter- clockwise to loosen (more slippage).

Tuning the Sealed Gear Differentials

You model is equipped with sealed, bevel gear differentials. The differentials allow the left and right wheels to spin at different speeds while turning. You can increase or decrease the torque transmitted between the left and right wheels by changing the viscosity of the silicone oil inside the differentials. The viscocity of the oil is indicated as a weight (W). Higher weights are more viscous, meaning the oil

is “thicker.” Lower weight numbers are less viscous, meaning the oil is “thinner.” Filling the differential with higher viscosity (thicker) oil “tightens” the differential, transferring more power to the wheel with the most traction. Filling the differentials with lower viscosity (thinner) oil “loosens” the differential, transferring less power to the wheel with the most traction. Traxxas sells a variety of differential tuning oils specifically designed for use in your model.

Your model’s gear differentials have been tuned specifically to provide balanced handling and authentic gymkhana-style drift- cornering. The front differential has been filled from the factory with high-viscosity 50,000W silicone oil. The 50,000W oil allows the front wheels to pull the model through the turn when counter steering through a drift. Increasing the fluid viscosity increases the authority of the steering while drifting, but decreases the steering when not drifting (“grip driving”). Increasing the front differential viscosity too much will make the model difficult to drive (“twitchy”). Decreasing the front differential viscosity will decrease the ability of the model to drift, but will increase steering response when grip driving.

Front Differential oil viscosity tuning suggestions

•For drift cornering with a single Series 1 battery (6-cell NiMH), use the stock differential oil.

•For drift cornering with dual Series 1 batteries (12-cell NiMH in parallel, see page 11), use thicker/higher viscosity differential oil (higher weight number).

•For grip driving with single or dual batteries, use thinner/ lower viscosity differential oil (lower weight number).

Tuning the rear differential fluid will allow you to fine tune the amount of angle the model will exhibit during a drift. The rear differential is filled with 30,000W oil to keep the rear of the model from sliding out completely when drifting around a turn. Increasing the viscosity of the fluid will cause the model to over-rotate resulting in a spin. Decreasing the viscosity of the fluid will reduce the model’s drift angle. For grip driving, lowering the viscosity will allow the model to turn more easily.

Rear Differential oil viscosity tuning suggestions

•For drift cornering with a single Series 1 battery (6-cell NiMH), use the stock differential oil.

•For drift cornering with dual Series 1 batteries (12-cell NiMH in parallel, see page 11), use thicker/higher viscosity differential oil (higher weight number).

•For grip driving with single or dual batteries, use thinner/ lower viscosity differential oil (lower weight number).

WHEELS AND TIRES

You model is equipped with standard-size touring car wheels and tires that fit 12mm axle hexes. The wheels are 26mm wide and have a +4mm offset. The wheels are engineered specifically for your model, but many aftermarket touring car wheels and tires can also be fitted to alter the styling and handling characteristics of your model.

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