Vortech Superchargers 8-Rib Pulley Pack 2.85" Underdrive EFI/Renegade (1986 Ford Mustang / 1987 Ford Mustang / 1988 Ford Mustang / 1989 Ford Mustang / 1990 Ford Mustang / 1991 Ford Mustang / 1992 Ford Mustang / 1993 Ford Mustang 5.0) 8E018-285
2.85" 8-Rib Underdrive Pulley Pack for 1986-1993 Mustang 5.0 EFI & Renegade Systems
The Vortech Superchargers 8-Rib Pulley Pack (PN 8E018-285) is engineered specifically for 1986-1993 Ford Mustang 5.0L applications equipped with underdrive accessory systems, including Vortech EFI and Renegade supercharger configurations. This pulley pack is designed to help owners fine-tune boost output while maintaining proper belt alignment and drive geometry for underdrive setups.
Whether you are converting from a 6-rib drive to an 8-rib or 10-rib system, or adjusting boost levels to better match engine modifications, this package includes the necessary components to properly configure your Vortech supercharger drive system with improved belt grip and reliability.
Underdrive-Specific Pulley Design
This 2.85" underdrive pulley pack is intended for Mustangs running underdriven accessories, where accessory speeds are reduced compared to factory configurations. The pulley diameter and spacing are matched to Vortech's underdrive EFI and Renegade system layouts, ensuring correct belt tracking and consistent boost delivery.
The 8-rib belt interface provides increased surface contact compared to 6-rib systems, helping minimize belt slip as boost levels increase.
Performance & Capability
- Pulley Diameter: 2.85 inches
- Belt Drive: 8-Rib
- Accessory Configuration: Underdrive
- Boost Control: Enables precise boost tuning for EFI/Renegade systems
Application Notes
This pulley pack is designed exclusively for 1986-1993 Mustang 5.0L vehicles running underdrive EFI or Renegade Vortech supercharger systems. Proper belt length and supporting drive components should always be verified when changing pulley sizes or rib configurations.
Quick Specs
- Manufacturer: Vortech Superchargers
- Part Number: 8E018-285
- Product Type: Supercharger Pulley Pack
- Pulley Diameter: 2.85"
- Belt Type: 8-Rib
- Accessory Drive: Underdrive
- System Compatibility: EFI / Renegade
Emissions & Legal Notice
- NOT AVAILABLE OR LEGAL FOR SALE IN CALIFORNIA
- For off-road and competition use only
- Installation on emissions-controlled vehicles driven on public roads may violate U.S. federal emissions law
Fitment
- 1986 Ford Mustang 5.0L
- 1987 Ford Mustang 5.0L
- 1988 Ford Mustang 5.0L
- 1989 Ford Mustang 5.0L
- 1990 Ford Mustang 5.0L
- 1991 Ford Mustang 5.0L
- 1992 Ford Mustang 5.0L
- 1993 Ford Mustang 5.0L
FAQs
- What is the difference between underdrive and non-underdrive pulley packs?
Underdrive pulley packs are designed for systems that reduce accessory drive speeds, requiring different pulley sizing and spacing than non-underdrive configurations. - Can this pulley pack be used on standard non-underdrive systems?
No. This pulley pack is specifically engineered for underdrive EFI and Renegade Vortech systems and should not be used on non-underdrive setups.
Why Buy from Beefcake Racing?
Beefcake Racing is an authorized Vortech Superchargers dealer with extensive experience supporting Fox Body Mustang supercharger builds. From selecting the correct pulley configuration to dialing in boost safely, our team ensures every component is matched correctly for reliable performance.
Email: sales@beefcakeracing.com
Phone: 1-855-827-7223
CA Residents: WARNING: Cancer and Reproductive Harm www.P65Warnings.ca.gov
