Overview
The Hobbywing EZRUN Heat Sink with Fan (HW86080120) is a precision-engineered cooling solution designed specifically for 36mm diameter brushless motors, including the popular 3660 and 3674 motor sizes. This compact yet highly effective cooling accessory is an essential upgrade for anyone running high-performance RC vehicles with these motor specifications. Whether you're operating a competitive RC car, off-road buggy, or high-speed RC truck in the UK or beyond, maintaining optimal motor temperature is crucial for achieving maximum performance and extending component lifespan during extended running sessions.
Built for serious RC enthusiasts who demand reliability and performance, this heat sink and fan combination addresses one of the most critical challenges in RC motorsport: thermal management. When your brushless motor is operating at high load during competitive racing or weekend bashing, temperatures can quickly escalate beyond safe operating ranges. The Hobbywing EZRUN Heat Sink with Fan works in tandem with your motor's existing cooling system to actively dissipate excess heat, ensuring your motor maintains stable performance throughout your session without thermal throttling or damage.
This is the perfect accessory for RC hobbyists in the UK who are looking to upgrade their existing 3660 or 3674 motor setup, or for those building a new high-performance RC vehicle from scratch. Compatible with standard 36mm diameter motors, the EZRUN cooling solution represents excellent value for money and has become a trusted choice among recreational and competitive RC drivers alike.
Key Features
- Active Cooling Fan — The integrated electric cooling fan actively circulates air across the heat sink fins, dramatically improving thermal dissipation compared to passive cooling alone. This active cooling system ensures your motor remains within safe temperature ranges during sustained high-load operation, which is particularly important during racing events or extended weekend bashing sessions.
- Aluminium Heat Sink Construction — The heat sink body is manufactured from high-quality aluminium alloy, a material chosen specifically for its excellent thermal conductivity and lightweight properties. Aluminium dissipates heat far more efficiently than plastic alternatives, allowing your motor to shed excess thermal energy quickly and maintain consistent performance.
- Precision Design for 36mm Motors — This cooling solution is specifically engineered for 36mm diameter brushless motors, including the 3660 and 3674 variants. The carefully calculated dimensions ensure optimal fit and thermal contact with your motor, maximising the effectiveness of the cooling system.
- Compact and Lightweight Profile — Despite its powerful cooling capability, the EZRUN heat sink and fan assembly maintains a compact profile that won't significantly increase your vehicle's weight or alter its weight distribution. This is crucial for maintaining the handling characteristics of your RC car or truck.
- Efficient Fan Motor — The built-in fan motor is engineered for efficient operation, providing strong cooling airflow whilst maintaining reasonable power draw from your vehicle's battery system. The fan operates independently of your main motor circuit, ensuring dedicated cooling power throughout your run.
- Versatile Compatibility — Designed to work with standard 36mm diameter brushless motors, this heat sink offers broad compatibility across the RC hobby market. Whether you're running a Hobbywing EZRUN motor or another manufacturer's 3660/3674 specification motor, this cooling solution can enhance your vehicle's thermal management.
- Cost-Effective Performance Upgrade — Representing outstanding value for money, this heat sink and fan combo is an affordable way to significantly improve your motor's performance ceiling and component longevity. It's an investment that pays dividends in extended run times and more consistent lap times during racing.
Technical Performance
The Hobbywing EZRUN Heat Sink with Fan is engineered to address the thermal challenges of high-performance 36mm diameter brushless motors used in 1/10 scale and similar RC applications. When integrated with your 3660 or 3674 motor, this cooling system works to maintain optimal operating temperatures even during sustained high-load conditions. The aluminium construction provides superior thermal conductivity compared to plastic alternatives, whilst the active fan-assisted cooling actively drives air across the heat sink fins to maximise heat dissipation. This is particularly important when running high-KV motors (the 3660 and 3674 motors are available in multiple KV configurations including 2600KV, 3400KV, 1900KV, and 2300KV variants) at their maximum power output with 2S to 6S LiPo battery configurations. The compact design ensures the heat sink doesn't interfere with standard motor mounting arrangements or vehicle chassis clearances. For RC enthusiasts in the UK running competitive or casual setups with 36mm diameter motors, this cooling accessory represents a practical solution to thermal management that has proven its effectiveness across numerous RC applications. The fan motor operates independently from your main drive motor and battery system, providing dedicated cooling power that ensures consistent motor temperature throughout your entire run session, whether you're racing on the track or enjoying weekend bashings in the countryside.
What's in the Box
- Hobbywing EZRUN Heat Sink with integrated cooling fan
- Precision engineered for 36mm diameter motors (3660, 3674 sizes)
Frequently Asked Questions
- Will this heat sink and fan fit my 3660 and 3674 brushless motors? — This cooling solution is specifically designed for 36mm diameter brushless motors including 3660 and 3674 specifications. However, some users have reported that the assembly may require minor modification (such as careful trimming with a hacksaw) to fit perfectly in existing installations, particularly if your motor already has external wires or mounting brackets. We recommend measuring your motor diameter and checking clearances in your chassis before installation.
- What voltage does the cooling fan require to operate? — The integrated fan motor operates independently and draws power from your main battery system. Specific voltage requirements and current draw specifications are not detailed in the manufacturer documentation, so we recommend contacting our expert team at RC Model Shop for detailed installation guidance specific to your setup.
- Is this cooling solution suitable for beginners? — Whilst this is a straightforward accessory that bolts onto your existing motor, the installation may require some minor fitting and customisation depending on your specific motor and chassis combination. If you're new to RC modification, we recommend visiting our physical store in Walsall where our experienced team can advise on fitment and assist with installation if needed.
- How much does this heat sink improve motor cooling? — Active cooling systems significantly improve thermal dissipation compared to passive heat sinks alone. By combining an aluminium heat sink with an electric cooling fan, this accessory maintains much lower motor operating temperatures during sustained high-load operation. This translates to more stable performance, higher peak power output, and extended component lifespan.
- Will adding a heat sink and fan affect my RC vehicle's handling or weight distribution? — The EZRUN heat sink and fan assembly is designed with a compact, lightweight profile to minimise impact on your vehicle's overall weight and weight distribution. For most 1/10 scale and similar RC applications, the addition is negligible and won't significantly affect handling characteristics.
- Is this compatible with different motor brands or only Hobbywing motors? — This cooling solution is designed for any 36mm diameter brushless motor, regardless of manufacturer. Whether your motor is from Hobbywing, Spektrum, or another quality RC motor supplier, as long as it meets the 36mm diameter specification (typically 3660 or 3674 size designations), this heat sink should provide effective cooling.
Why Buy from RC Model Shop?
RC Model Shop is a trusted UK RC retailer and authorised dealer for all the brands we stock, including Traxxas, ARRMA, Losi, FTX, Hobbywing, Spektrum and more. Based in Walsall, we have a physical store where customers are welcome to come in, view products and purchase in store. Whether you are a seasoned competitor, a weekend basher, or just discovering the world of RC for the first time, our team of experienced RC enthusiasts is here to help you find the perfect setup and provide ongoing support. Order the Hobbywing EZRUN - Heat Sink with Fan for 3660,3674 motors HW86080120 today with confidence, knowing you are buying from an authorised retailer with genuine products, expert knowledge and a commitment to customer satisfaction. Shop online or visit us in Walsall — we look forward to helping you get the most out of your RC experience.
- Brand: Hobbywing
- Model Number: HW86080120
- EAN: 5051294081591
- Product Type: Motor Heat Sink with Integrated Cooling Fan
- Motor Size Compatibility: 36mm diameter (3660, 3674 motors)
- Heat Sink Material: Aluminium alloy
- Cooling Type: Active fan-assisted cooling
- Cooling Fan: Integrated electric fan motor
- Compatible Motor Specifications: 3660 and 3674 brushless motors, 36.5mm outer diameter, 60-74mm length, 5mm shaft diameter
- Compatible Motor KV Ratings: 1900KV, 2300KV (3674), 2600KV, 3400KV (3660)
- Compatible Battery Systems: 2S to 6S LiPo (dependent on motor KV configuration)
- Compact lightweight design for minimal impact on vehicle weight distribution
We want to make sure your delivery goes smoothly, so here are some important details about our service:
- For orders above £120, we offer delivery to most mainland UK addresses. For orders under £120, we can still deliver to Northern Ireland and the outlying isles, as long as the item can be sent by Royal Mail, weighs less than 30kg, and fits within 61cm × 46cm × 46cm. Some highland and remote areas may carry an extra delivery charge as couriers often apply surcharges in these locations. If you live in one of these areas, feel free to contact us before ordering so we can confirm the delivery options and costs for you.
- Most of our products include delivery in the price. If your order is under £90, a small delivery fee will apply but do not worry this will always be clearly shown at checkout before you complete your purchase.
- Depending on what you choose at checkout, your order will usually be delivered either the next working day or within 2 working days. For next day delivery please place your order before 2:00pm. Orders are dispatched Monday to Friday only. Some items may take a little longer and if that is the case we will always show the expected delivery time on the product page.
- If your order includes items with different dispatch times we will normally wait and send everything together once all items are in stock. If one of the items is going to take a while we will give you the choice either wait for everything to arrive or let us send the available items now and deliver the rest later. It is up to you.
- We use trusted delivery partners to make sure your order gets to you safely and on time. We use DPD for next working day deliveries and Royal Mail for the 2 day option.
- As soon as your order is on its way we will send you a tracking number by email. If you provide your mobile number at checkout we will also send delivery updates straight to your phone so you can keep an eye on progress.
- If a product is marked as "Dispatched within 3 working days" delivery usually takes around 3 to 5 working days from when your order is placed.
- For customers in Inverness and other parts of the Scottish Highlands deliveries can take up to 2 working days even if you select next day delivery as couriers do not currently offer a guaranteed next day service to those areas.
