User Manual

Kit Contents:
● Each complete VFI Induction System includes:
● S&S
®
VFI fuel rail and O-rings
● Pair of S&S VFI manifolds (complete kits only)
● S&S VFI two-barrel throttle body
● S&S VFI tuned intake runner OR teardrop assembly
● Air filter(s)
● Mounting hardware
● Installation instructions
● VFI Module (Master kits only.)
VFI Induction System Installation
Refer to "VFI Manifold Application Charts" to confirm that
manifolds are correct for your motorcycle. See Picture 1 and
Chart 1. Read instructions thoroughly to familiarize yourself
with all procedures before beginning installation.
NOTE - Installation of S&S VFI Induction Systems is easier
with gas tanks removed. Some owners may elect to perform
installation without removing gas tanks, or performing a
partial removal. This is left to individual discretion. S&S
recommends referring to appropriate Harley-Davidson
®
service manual for correct removal procedure as necessary.
2
Introduction
S&S
®
VFI Tuned Induction Systems and Teardrop Induction Systems are designed for fuel injected big twin engines, 1995-
2001, except Harley-Davidson
®
Softail
®
models. This system replaces the stock EFI induction module assembly, while
utilizing many of the original fuel system components, sensors and wiring harness. VFI Induction Systems must be used
with the VFI Module.
Integrated into the throttle body is a sophisticated idle air control system which ensures excellent starting and idling. The original
throttle cables are used, and a cruise control kit is available which uses the original cruise control cable. Manifolds are available
to allow fitment on engines of various heights with either stock (1.625" diameter) ports or S&S (1.78" diameter) ports.
When used in conjunction with the S&S VFI Module and an appropriate calibration map, the S&S VFI Induction Systems
will maximize the power of virtually any fuel injected big twin engine, while providing excellent driveability and fuel economy.
IMPORTANT NOTE - Recommended for Racing Only.
S&S VFI Induction Systems are not legal for use in California on motor vehicles operated on public highways or in other
states where similar pollution laws apply. The user shall determine the suitability of the product for his or her use and shall
assume all risk and liability in connection therewith.
Curves from bottom to top. Lowest curves show a stock Harley-
Davidson
®
Twin Cam 88
®
engine with stock exhaust, for
comparison. Second curves show a stock Twin Cam 88
®
engine
with The S&S VFI module, Tuned Induction system, and stock
exhaust. The top curves show a stock Twin Cam 88
®
engine with
The S&S VFI module and Tuned Induction system with an
aftermarket exhaust system. Dyno results from Dyno Jet 150
Chassis dynamometer at S&S Cycles Research and Development
facility.
Curves from bottom to top. Lower curves show a stock Twin Cam
88
®
engine with stock exhaust, for comparison. Top curves show a
stock Twin Cam 88
®
engine with The S&S VFI module and Teardrop
Induction system with stock exhaust. Performance increase is due
to improved flow of S&S air cleaner and manifolds. Dyno results
from Dyno Jet 150 Chassis dynamometer at S&S Cycles Research
and Development facility.