4A-GE 20V Inline-4 Engine Miniature

A detailed 3D printable tribute to one of the most iconic high-revving engines.

Introduction

This project is based on an original 3D scan model of the Toyota 4A-GE 20V engine, sourced from:

Bremar 3D Scan Store
https://www.bremar3dscanstore.com/cad-models/p/toyota-4age-20-valve-engine

Model Modification

The original scan model has been:

• Cleaned and remeshed
• Geometry corrected and simplified
• Surfaces refined for FDM printability
• Wall thickness adjusted
• Overhangs optimized
• Structural elements rebuilt

In addition, I redesigned and added:

• Separate intake trumpets
• Exhaust headers
• Display base
• Modular assembly structure

This is not a raw scan upload — it is a mechanically adapted and print-optimized version.

Printing

Layer Height: 0.2mm
Infill: 15–25%
Supports: recommended for exhaust headers
Material Recommendations:

• Silver filament for headers

• Black for cam cover

• White / Grey for block

Resin printing will provide higher detail if preferred.

Assembly

Due to fine components and printer tolerance variation, CA glue (super glue) is recommended.