Vortech Superchargers 8-Rib Pulley Pack 3.15" 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) 8E018-315
3.15" 8-Rib Underdrive Pulley Pack for 1986-1993 Mustang 5.0 EFI & Renegade Systems
The Vortech Superchargers 8-Rib Pulley Pack (PN 8E018-315) is designed specifically for 1986-1993 Ford Mustang 5.0L applications equipped with underdrive accessory systems, including Vortech EFI and Renegade supercharger configurations. This pulley pack allows precise boost adjustment while maintaining the correct belt alignment and drive geometry required for underdrive layouts.
Whether you are upgrading from a 6-rib drive to an 8-rib or 10-rib system or fine-tuning boost output to better match your engine combination, this package includes the necessary components to properly configure your Vortech supercharger drive with improved belt traction and reliability.
Underdrive-Specific Pulley Design
This 3.15" underdrive pulley pack is engineered for Mustangs running underdriven accessories, where accessory speeds are reduced compared to factory configurations. Pulley diameter and spacing are matched to Vortech's EFI and Renegade system geometry, ensuring proper belt tracking and consistent boost delivery.
The 8-rib belt interface increases surface contact area over traditional 6-rib setups, helping reduce belt slip as boost levels increase.
Performance & Capability
- Pulley Diameter: 3.15 inches
- Belt Drive: 8-Rib
- Accessory Configuration: Underdrive
- Boost Control: Enables precise boost tuning for EFI/Renegade systems
Application Notes
This pulley pack is intended exclusively for 1986-1993 Mustang 5.0L vehicles running underdrive EFI or Renegade Vortech supercharger systems. When changing pulley diameter or rib configuration, proper belt length and supporting components should always be verified to ensure correct fitment and reliable operation.
Quick Specs
- Manufacturer: Vortech Superchargers
- Part Number: 8E018-315
- Product Type: Supercharger Pulley Pack
- Pulley Diameter: 3.15"
- 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 does a 3.15" underdrive pulley change?
A 3.15" pulley allows controlled boost adjustment while maintaining proper belt alignment on underdrive EFI and Renegade systems. - Can this pulley pack be used on non-underdrive systems?
No. This pulley pack is engineered specifically for underdrive accessory configurations 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 properly matched for reliable, repeatable performance.
Email: sales@beefcakeracing.com
Phone: 1-855-827-7223
CA Residents: WARNING: Cancer and Reproductive Harm www.P65Warnings.ca.gov
