[Speed Test] Tamiya The Frog Suspension Upgrade Hits 49.9 km/h

The Frog

Keeping the power system identical, I’ve made several suspension upgrades.

Today, I’m testing the speed of “The Frog” with three major chassis modifications.

Let’s see how these geometry and tire changes affect our top speed.

Power System and Three Suspension Upgrades

The Tamiya The Frog setup used for today’s speed run.

The power system remains the same as my previous test run:

  • Motor: YOKOMO ZERO3 8.5T
  • ESC: YOKOMO BL-EP6
  • Battery: LiPo 2S 7.4V 50C 4000mAh

For this session, I modified three key areas of the suspension:

Rear wide-tread conversion installed.

Full details on the rear modification are available in this article.

Modified front suspension arms installed.

You can check the details of the front arm swap in this article.

Swapped to Kyosho Optima tires for better traction.

Read more about the tire selection in this article.

Speed Test Results at the Park

I took the modified buggy to the park to evaluate the new setup.

The result: 49.9 km/h, slightly breaking the previous record of 49.7 km/h.

The GPS speedometer clocked a top speed of **49.9 km/h**!

This successfully edges out my previous record of 49.7 km/h.

Thermal Issues and Future Solutions

However, I noticed a performance drop after a few high-speed passes.

Upon inspection, the ESC was running at a very high temperature.

This speed drop was likely caused by the ESC’s thermal protection kicking in.

To maintain consistent performance, I am now planning to install a cooling fan before the next run.

Conclusion

The three suspension adjustments successfully squeezed out a slightly higher top speed.

At the same time, it highlighted the critical need for proper thermal management with high-power electronics.

I’ll add a cooling fan and push for an even higher record next time!

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