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HPI Baja 5B vs 5T: Which Is The Best RC Car?

If you want to know the difference between the HPI Baja 5B & 5T keep reading. Also, learn the best fuel mixture for the 5B and how fast the 5T is.

Which Is The Best: HPI Baja 5B or 5T?

  • For Speed and Agility: If you’re seeking a lightweight and nimble racer that can easily tackle a variety of terrains, the Baja 5B might be your best pick.
  • For Durability and Rough Terrains: If you plan to race in harsher terrains and require something robust that can withstand more abuse, the Baja 5T is hard to beat.
  • Budget Considerations: If you’re on a tighter budget, the Baja 5B provides excellent value for its price. However, if you’re willing to invest a bit more for added protection and durability, the 5T is worth the extra cost.

In essence, both cars uphold the HPI Racing legacy and promise countless hours of fun. Assess your needs, track preferences, and budget to make the most informed decision.

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HPI Baja 5B


The Baja 5B is designed as a buggy-style RC car. It boasts a sleek and aerodynamic profile, making it ideal for those who love racing on diverse terrains. The open-wheel design provides a unique visual experience as the suspension does its work.


Equipped with a powerful 23cc gasoline engine, the 5B offers an impressive punch for its size. Its rear-wheel drive ensures solid acceleration and stability. The built-in tuning capabilities allow enthusiasts to tweak the car’s performance to their preferences.


The chassis is made of durable aluminum and nylon components, providing resilience against wear and tear. This makes it suitable for off-road terrains, ensuring longevity even in rough conditions.


Generally, the 5B is priced lower than the 5T, making it a more budget-friendly option for those new to the hobby or conscious about their spending.

HPI Baja 5T


Modeled after real-world trophy trucks, the Baja 5T sports a closed-wheel design, giving it a more rugged and aggressive look. Its larger body shell offers protection against debris, ensuring that the internal components remain unharmed during intense racing sessions.


While it shares the same engine as the 5B, the 5T’s weight and design make it behave differently on the track. It offers better stability during jumps and high-speed runs due to its slightly heavier build.


The 5T is built like a tank. With a reinforced body shell and heavy-duty suspension, it is designed to take on the harshest terrains without breaking a sweat. The additional weight and protection make it less susceptible to damage upon collisions or falls.


Due to its added features and enhanced durability, the Baja 5T typically comes at a higher price point compared to the 5B.

What is the fuel mixture for HPI Baja 5B?

The recommended mixture is a 25:1 gasoline-to-oil ratio. which means you should mix 25 parts gasoline with 1 part two-stroke oil. Following this ratio ensures that the engine receives proper lubrication while minimizing the risk of carbon build-up and other potential issues.

The Baja 5B runs on a two-stroke internal combustion engine, requiring a specific fuel mixture to operate optimally.

In addition, always adhere to and use high-quality components to ensure your RC car performs at its best. Regular maintenance, combined with the right fuel mixture, will keep your Baja 5B roaring across terrains for a long time.

Two-Stroke Engine Basics:

Before we go any further for the Baja 5B, it’s essential to understand the fundamentals of two-stroke engines. Unlike four-stroke engines, two-stroke engines require a mixture of oil and gasoline for lubrication and combustion.

The oil ensures the internal components of the engine remain lubricated, while the gasoline is responsible for combustion.

Steps to Mix the Fuel:

  • Safety First: Always mix fuel in a well-ventilated area, away from sparks, open flames, or any other ignition sources. Use safety gloves and goggles to protect yourself from splashes.
  • Selecting the Right Oil: It’s crucial to use a quality two-stroke oil designed for air-cooled engines. Such oils protect against wear, deposit formation, and ring sticking.
  • Measuring: Using a measuring container, first pour the required amount of two-stroke oil. For instance, for every liter of gasoline, you’d need 40ml of oil to achieve a 25:1 mixture.
  • Mixing: After adding the oil, pour the gasoline into the container. Seal the container and shake it vigorously for a minute to ensure a thorough mix.
  • Storage: Store the mixed fuel in a cool, dry place away from sunlight. Use a dedicated fuel container that’s clearly labeled. It’s a good practice not to store mixed fuel for extended periods, as it can degrade over time.

Tips and Considerations:

  • Avoid Overmixing: Too much oil can lead to excessive smoke, fouled spark plugs, and reduced performance. Conversely, too little oil can result in inadequate lubrication, leading to engine damage.
  • Freshness Matters: Always use fresh gasoline when preparing your mixture. Old or stale gasoline can result in poor engine performance and may even harm your engine.
  • Tuning: Remember, the Baja 5B, like all high-performance RC cars, may require some tuning based on the specific conditions you’re running it in. Factors like altitude, temperature, and humidity can impact the engine’s performance with a given fuel mixture.
  • Ethanol Content: It’s essential to be wary of the ethanol content in gasoline. High ethanol content can be detrimental to two-stroke engines, causing issues such as corrosion, rubber degradation, and phase separation. If possible, use ethanol-free gasoline.

How fast is the HPI Baja 5T?

Out of the box, the HPI Baja 5T can reach speeds of around 40 mph (64 km/h). This is quite fast for a model of its size and weight. However, it’s essential to note that various factors can influence this speed:

  • Terrain: On a smooth, flat surface, the Baja 5T can reach its top speeds. On rougher terrains or off-road conditions, the speed might be somewhat reduced due to the additional resistance and the need for control.
  • Tuning and Modifications: Many enthusiasts choose to modify their Baja 5T trucks. With the right upgrades, such as performance-enhancing parts and fine-tuning, the vehicle can push past its stock speed. Some hobbyists have reported speeds nearing 50 mph (80 km/h) with the right modifications.
  • Maintenance: Like all RC vehicles, regular maintenance ensures optimal performance. A well-maintained Baja 5T will likely hit its top speeds consistently, while a neglected one might lag.

History and Overview

Before going any further, it’s worth understanding the Baja 5T itself. Produced by HPI Racing, a company well-regarded in the RC community, the Baja 5T is a larger iteration of the Baja series, known for its high-quality build, durability, and off-road prowess.

Under the Hood

The HPI Baja 5T, out of the box, usually comes with a 26cc 2-stroke gasoline engine. This gives it an impressive amount of power for an RC vehicle, especially considering its size and weight.

The engine, paired with a responsive throttle and a high-quality exhaust system, makes the Baja 5T a force to be reckoned with on any track or terrain.

Safety First

While it’s exhilarating to push the Baja 5T to its limits, it’s essential to prioritize safety. Due to its size and power, the Baja 5T can be dangerous if not controlled appropriately. Always ensure you’re in a safe area, free from obstructions and bystanders, especially when testing its top speeds.