Formula 90-97 Chassis - Hard

The Scaleauto SC-6670A Chassis: Precision to the Millimetre for Your Formula 90-97

The SC-6670A is the official chassis from Scaleauto for its Formula models from the 90s up to 1997. Made from black injection-moulded plastic, with a minimum thickness of just 0.65 mm, it combines lightweight construction and controlled stiffness to provide a very interesting preparation base both on Sport track and in club environments.

Main Features

• Material and Thickness: black injection-moulded plastic with a thickness of 0.65 mm, optimised to minimise weight without sacrificing structural integrity.
• Standard Hardness: Hard version, designed for predictable and balanced behaviour, compatible with the inline motor mount SC-6523C.
• Pre-cut Front Wheel Diffusers: ready to be removed and adapted according to the wheel configuration you choose, without special tools.
• Adjustable Front Axle Height via M2.5 allen screws, allowing for precise regulation of steering behaviour and front ride height.
• 6 Optional Suspension Points for the chassis, offering advanced configuration possibilities for those who wish to explore setups with active suspension.
• Body Adjustment at the front and rear using M2.5 screws, facilitating a firm and repeatable fit during preparation sessions.

Compatibility and Assembly

This chassis is specifically designed for Scaleauto's two Formula 90-97 models. The motor configuration is inline (motor perpendicular to the rear axle, in line with the car), which helps lower the centre of gravity and improves cornering stability. The compatible motor mount is the SC-6523C.

The adjustment system with M2.5 allen screws makes work on the bench easy without the need for special tools: a suitably sized allen key is sufficient to make all height adjustments and body fixings.

Behaviour and Performance

The Hard version of this chassis offers a more direct response and less flex than softer versions, resulting in greater stability at high speeds and more predictable behaviour in fast corners. It is a common choice for tracks with high flow or when consistency from lap to lap is prioritised over agility in chicanes.

The 6 optional suspension points open the door to experimenting with chassis geometries that are not available in conventional standard chassis, something that more advanced builders will particularly appreciate.

Ideal for…

• Enthusiasts who want to build or rebuild one of their Scaleauto Formula 90-97 from scratch.
• Club competitors who need to replace a damaged chassis while maintaining original specifications.
• Builders who wish to explore optional suspension configurations on a scale formula chassis.

Points to Consider

This chassis is exclusive to the Scaleauto Formula 90-97 models and is not interchangeable with other chassis from the brand. The recommended motor mount is the SC-6523C; using other mounts could compromise the alignment of the drivetrain. Always check compatibility before combining parts from different references.

Frequently Asked Questions

Which Scaleauto models is this chassis compatible with?

The SC-6670A is designed for the two Scaleauto Formula 90-97 models. It is not intended for other models from the brand outside of that specific range.

What motor mount do I need for this chassis?

The compatible motor mount indicated by Scaleauto for this chassis is the SC-6523C, which corresponds to an inline configuration.

What is the difference between the Hard version and a softer version?

The Hard version offers less flex, resulting in a more direct response and greater stability at high speeds. Softer versions allow for greater absorption of track imperfections, being more versatile on technical circuits. The choice depends on the layout and driving style.

Are the front diffusers already removed or do they need to be cut out?

They come pre-cut, meaning they are marked for easy removal with fingers or with the help of a cutter. No special cutting tools are required.

What screws are used to adjust the front axle and body?

The front axle and body fixing use M2.5 allen screws, a common standard in the preparation of competition slot cars.

Is it possible to mount active suspension on this chassis?

The chassis features 6 optional suspension points for the chassis, allowing for exploration of suspension configurations. However, suspension components are not included with the chassis and must be purchased separately.

The Scaleauto SC-6670A Formula 90-97 Hard chassis is a precision injection-moulded slot car chassis designed for Scaleauto's 1990s Formula models. At just 0.65 mm thick, it combines lightweight construction with a stiff, predictable feel suited to high-speed club racing. Compatible with the SC-6523C inline motor mount, it features adjustable front axle height via M2.5 allen screws, pre-cut front wheel diffusers, and six optional suspension points for advanced setup options. An essential spare and upgrade part for Scaleauto Formula slot car builders and competitors.