Jackal Motorsports EA837 / EA387 Eaton TVS R1320 Supercharger Porting Template – Safe Porting Profile

The Jackal Motorsports EA837 / EA387 Supercharger Porting Template is a purpose-built DIY tool designed specifically for Audi and VW platforms equipped with the factory Eaton TVS R1320 supercharger. This template provides a safe, repeatable, and controlled method for porting the supercharger housing while minimizing the most common risks associated with DIY port work.

This tool was created to eliminate guesswork, reduce the chance of irreversible damage, and allow enthusiasts to confidently port their own supercharger without risking bearing contamination or uneven material removal.

Designed by Brian Denton (@xs_motorworks), this is a true “safe template” — engineered for consistency, symmetry, and protection of critical supercharger components.

Eaton TVS R1320 Supercharger Overview (EA837 / EA387)

Audi’s EA837 3.0T supercharged V6 (often referred to by enthusiasts as EA387 when discussing the supercharger assembly itself) is factory-equipped with an Eaton Twin Vortices Series (TVS) R1320 Roots-type supercharger.

Key details for clarity and SEO:

• Supercharger Model: Eaton TVS R1320
• Displacement: 1,320 cc per revolution
• Design: Roots-type, four-lobe rotors with 160° twist
• OEM Application: Audi / VW EA837 3.0T engines

The Eaton TVS R1320 is known for its instant boost response, OEM-level reliability, and strong low-end torque. However, like most Roots-type superchargers, airflow efficiency can benefit from carefully controlled inlet and outlet porting when done correctly.

What This Supercharger Porting Template Does

This template positively locates in the rear needle bearing sockets of the Eaton TVS R1320 supercharger housing. By indexing from these factory bearing locations, the template establishes a fixed and repeatable porting boundary, allowing you to:

• Precisely control how far material is removed
• Maintain even port geometry from side to side
• Prevent metal shavings from entering the needle bearing bores
• Avoid accidental over-porting into critical areas

This makes the porting process significantly safer and more consistent, especially for DIY users without access to specialized fixtures.

Chemical-Resistant 3D Printed Construction

The template is manufactured from chemical-resistant 3D printed material, chosen specifically for workshop use. It is resistant to:

• Cutting oils
• Degreasers and cleaning solvents
• Common shop chemicals

This is not a fragile print. The material is durable, dimensionally stable, and suitable for repeated porting projects.

Designed for Safe, Repeatable DIY Porting

Yes — there are more aggressive Eaton TVS R1320 porting methods available.

This product is intentionally designed as a safe, conservative template, ideal for:

• First-time supercharger porting
• DIY enthusiasts who want consistency over maximum material removal
• Builders who want to avoid over-porting one side versus the other
• Anyone concerned about damaging an expensive supercharger housing

Rather than chasing absolute maximum airflow, this template focuses on control, symmetry, and reliability.

Why Use a Supercharger Porting Template?

Porting an Eaton TVS R1320 without a guide introduces several risks:

• Uneven porting left-to-right
• Over-porting into non-repairable areas
• Metal debris entering bearing pockets
• Long-term reliability issues due to inconsistent geometry

This template serves as both a physical limit and a visual reference, dramatically reducing those risks.

Vehicle Fitment – EA837 / EA387 Platforms

This template is designed for vehicles equipped with the EA837 3.0T Eaton TVS R1320 supercharger, including but not limited to:

• Audi B8 S4
• Audi B8.5 S4
• Audi B8 S5
• Audi B8.5 S5
• Audi C7 A6 3.0T
• Audi C7 A7 3.0T
• Audi C7 S6 / S7 (EA837 variants)
• Audi C7 CREC 3.0T platforms
• Audi Q5 / SQ5 3.0T

If your vehicle uses the factory Eaton TVS R1320 supercharger, this template is designed to index correctly in the rear needle bearing sockets of that housing.

Sold at Cost – Community-Driven Tool

This product is sold at cost of materials plus shipping.

The goal is not profit — it’s to support the DIY Audi 3.0T community, reduce costly mistakes, and make supercharger porting more accessible to enthusiasts who want to learn and work on their own hardware.

Ideal Use Cases

• DIY Eaton TVS R1320 supercharger porting
• EA837 / EA387 airflow improvement projects
• First-time supercharger porting
• Builders seeking a repeatable baseline port
• Anyone wanting to protect bearing bores during porting