Edelbrock 75284 Installation Instructions

CHRYSLER 5.7L HEMI DUAL QUAD INTAKE MANIFOLD
For Carbureted Chrysler HEMI 5.7L Engines
®
Catalog #7528, #75284

INSTALLATION INSTRUCTIONS

Please study these instructions carefully before installing your new Edelbrock RPM Dual-Quad Intake Manifold. If you have any
questions, please contact our Technical Hotline at: 1-800-416-8628 , 7am - 5pm, Monday-Friday, Pacific Standard Time or e-mail
us at Edelbrock@Edelbrock.com.
IMPORTANT NOTE:
Proper installation is the responsibility of the installer. Improper installation will void
warranty and may result in poor performance and engine or vehicle damage.
DESCRIPTION: This intake manifold is designed to allow the use of dual carburetors on a 5.7L Chrysler HEMI crate engine or a
production HEMI engine that has been transplanted into an older muscle car or custom hot rod. This manifold is not intended to be
installed on a vehicle that is factory equipped with a HEMI engine. All new production HEMI engines are equipped with electronic fuel
injection from the factory and additional accessories will be required to allow them to function properly with carburetors.
EGR SYSTEMS: This manifold is not compatible with any EGR system or emissions control device, apart from the supplied PCV valve.
It is not legal for installation on a vehicle required to meet emission standards.
ACCESSORIES
CARBURETORS: Most applications will work best with two 500 cfm carburetors setup with a progressive linkage. Edelbrock offers
carburetors that have been calibrated specifically for our dual quad manifolds as part #1803 with electric choke and #1804 with
manual choke. When using a progressive linkage, the front carburetor will have the choke disabled and so an #1804 is strongly
recommended for that position. The rear carburetor will handle most low speed fueling and it can be equipped with manual or electric
choke, or no choke at all if the vehicle will be used exclusively in warm weather.
LINKAGES: Progressive linkage kit #7094 is strongly recommended for use with Edelbrock carburetors installed on this manifold.
Use of a direct 1:1 linkage can cause a stumble or bog during low speed acceleration. Throttle and transmission kickdown cables
can vary widely from one application to another; adapters and/or brackets may need to be purchased or fabricated.
FUEL REQUIREMENTS: Edelbrock carburetors require a fuel pressure of 4 - 6.5 psi for proper operation. This can be achieved
without a regulator by using Edelbrock electric fuel pump #1791. A low pressure pump must be used; regulating an EFI fuel pump
down to 6 psi will cause premature failure of the pump. Edelbrock offers a dual feed fuel line, part #8091, that will simplify plumbing
your pump to two Edelbrock carburetors. A filter must be installed between the pump and carburetors to prevent any potential engine
damage.
GASKETS: The 5.7L HEMI engine does not use traditional intake gaskets. Eight individual rubber seals will need to be inserted into
the machined grooves that surrond each port exit of the manifold. These seals are reusable, but if they are damaged or missing they
can be purchased individually from any Chysler dealership as part #53032382AB.
IGNITION TIMING CONTROLLER: These engines were designed by Chrysler to be used exclusively with an electronic fuel injection
and ignition computer, which allowed them to replace a mechanical spark distributor with crankshaft and camshaft position sensors.
When using carburetors on this style of engine, it will be necessary to have a separate ignition computer to interpret the shaft postion
sensor signals, apply the appropriate amount of retard or advance, and to drive the coil on plug ignition system. Our performance
testing was done with HEMI carbureted crate engine (MOPAR part #4510594) and their non-programmable controller #4510816.
Edelbrock offers a programmable controller for engines that will be using a different camshaft or have been converted from EFI as
part #91239.
Catalog #7528, #75284 ©2008 Edelbrock Corporation
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Rev. 3/08 - AJ/mc Brochure #63-7528