Carrito Engine Envelope Standard
CSG-Go Compatibility Document

Carrito Program Information:
https://www.charityhelpersfoundation.com/carrito/


Overview

The Carrito Engine Envelope Standard defines the engine space requirements for vehicles built under the Carrito platform.

Rather than requiring a specific engine model, the Carrito system defines a minimum engine space that must be preserved in all compatible builds. This ensures that vehicles built today can support future engine upgrades without major structural modification.

The Carrito Small Grid – Go (CSG-Go) uses the Chevrolet Ecotec engine family as the baseline compatible engine due to its availability and compatibility with the Goblin V1 architecture. However, the CSG-Go engine bay must always maintain the Carrito Engine Envelope so that future Carrito engine systems can be installed.


Baseline Engine Compatibility

The following engines are considered baseline compatible for the CSG-Go platform:

Chevrolet Ecotec 2.2L
Chevrolet Ecotec 2.4L
Chevrolet Ecotec 2.0L Turbo

These engines are widely available and provide reliable highway performance when installed using the Goblin V1 drivetrain configuration.

Builders may use other compatible engines if they fit within the defined Carrito Engine Envelope and do not violate the structural rules of the platform.


Carrito Engine Envelope

All CSG-Go builds must preserve a minimum engine envelope space to ensure compatibility with future engine systems.

Example envelope dimensions (minimum internal space):

Length: 32 inches
Width: 28 inches
Height: 26 inches

Service clearance should allow an additional 2–3 inches around the engine where possible to permit maintenance access and airflow.


Engine Mount Zones

Instead of requiring fixed engine mounts, the Carrito platform defines engine mount zones.

Typical mount zones include:

Left frame rail mounting zone
Right frame rail mounting zone
Rear support mounting zone

These zones allow builders to fabricate custom mounts for compatible engines while maintaining the structural integrity of the Motor Modular Frame (MMF).


Cooling and Exhaust Space

Builders must provide adequate space for:

Radiator and cooling lines
Air intake routing
Exhaust routing
Heat management

These systems must not interfere with the structural components of the frame or the Carrito Modular Dock.


Future Carrito Engine Systems

The engine envelope standard ensures that future Carrito engine systems can be installed into existing vehicles.

By maintaining the defined engine space, a CSG-Go vehicle may later be upgraded to a Carrito-certified engine system with minimal structural changes.

This approach allows the platform to evolve over time while protecting early builders from needing to redesign their vehicles.


Compatibility Rule

A vehicle remains Carrito engine compatible if:

The Motor Modular Frame geometry is preserved.
The Carrito Engine Envelope space is maintained.
Engine mounts remain within defined mounting zones.
Cooling and exhaust systems do not interfere with structural elements.


For official program information and updates visit:
https://www.charityhelpersfoundation.com/carrito/
