Catalog #3562, 3563, 3564, 3565
Rev. 3/06
Page 4 of 16
©2006 Edelbrock Corporation
Brochure #63-0047
®
INSTALLATION INSTRUCTIONS
for Performer Multi-Point EFI System
for 7.4L TBI-Equipped Chevrolet/GMC Vehicles
Catalog #3562 and #3564 for 1987-1990 Model Years
Catalog #3563 and #3565 for 1991-1995 Model Years
• APPLICATION
INFORMATION:
Performer Multi-Point EFI Systems are designed for 1987-1990 (#3562 and #3564) and
1991-1995 (#3563 and #3565) 7.4L Chevy/GMCs originally equipped with Throttle Body Injection. These complete
systems utilize the stock computer and throttle body unit for a simple and effective conversion to multi-point fuel injection.
Fuel is injected directly into each port in the head for ideal fuel distribution and efficiency.
• TECHNICAL
SUMMARY:
In 1987, Chevrolet introduced their Throttle Body Injection (TBI) systems. Produced from 1987
to 1995 on all pick-up trucks and Suburbans, this TBI system was essentially an intermediate step between a carburetor
and true port (multi-point) fuel injection. In these TBI systems, two injectors are positioned above the throttle blades of a
two-barrel throttle body and fuel is injected into the manifold, much like a carbureted system. This arrangement suffers
from distribution problems because the fuel spray from the injectors does not stay in suspension with the incoming air,
resulting in uneven distribution. Our Performer Multi-Point Systems include an intake manifold designed to deliver an
equal air charge to each cylinder. Each injector delivers exactly the same amount of fuel to each cylinder for an extremely
even air/fuel ratio from cylinder-to-cylinder. This permits us to tune the system for ideal fuel and spark delivery for more
horsepower, torque and improved mileage.
Performer Multi-Point Systems include all parts needed to make the conversion. The stock TBI unit is retained as an air
valve and the factory computer (re-programmed) is also retained to control the injectors in a batch-fire mode. In the
Edelbrock systems, all of the factory sensors are retained and fully functional. The compact size was achieved by using
extruded aluminum fuel rails with new Magnetti Marelli
®
pico injectors. These are half the size of conventional style
injectors.
•
SPECIAL NOTICE:
This Edelbrock part has received an Executive Order number (E.O. #) from the California Air Resources
Board (C.A.R.B.) making it legal for street use on pollution-controlled motor vehicles in all 50 states. To assist you with
emissions inspection, we have included a silver fan shroud decal to verify that this part is a legal replacement part on the
vehicle for which it is cataloged. The adhesive-backed decal should be affixed to your fan shroud next to the existing
emission and engine specification decal. Do not cover your original equipment specification decal with the Edelbrock fan
shroud decal. E.O.# decal is shipped with the computer chip .
If you have any questions, please call our...
EFI Technical Hotline at: (800) 416-8628, Option 3
8:00 am - 5:00 pm, Monday-Friday (Pacific Standard Time)
