Edelbrock 2804 - Manual

Catalog #2801, 2802, 2803, 2804, 2805, 2806
Rev. 6/07 - RS/mc

1 of 2

©2007 Edelbrock Corporation

Brochure #63-0339

BIG VICTOR (SPREAD-PORT) INTAKE MANIFOLDS

For Standard and Tall Deck Big Block Chevrolet

V8s Using Spread-Port Style Cylinder Heads

Catalog #s 2801, 2802, 2803, 2804, 2805, 2806

INSTALLATION INSTRUCTIONS

®

PLEASE

study these instructions carefully before beginning this installation. Most installations can be accomplished with common tools and

procedures. However, you should be familiar with and comfortable working on your vehicle. If you do not feel comfortable performing this installation,
it is recommended to have the installation completed by a qualified mechanic. If you have any questions, please call our

Technical Hotline at:

1-800-416-8628

, 7:00 am - 5:00 pm, Pacific Standard Time, Monday through Friday or e-mail us at

[email protected]

.

IMPORTANT NOTE: Proper installation is the responsibility of the installer. Improper installation

will void your warranty and may result in poor performance and engine or vehicle damage.

PLEASE

complete and mail your warranty card. Be sure to write the model number of this product in the "Part #____" space.

THANK YOU

.

DESCRIPTION:

Big Victor intake manifolds are designed for big block Chevrolet engines using spread-port style cylinder heads such as Edelbrock Big

Victor Dart Big Chief, Profiler Raptor, or Brodix Big Duke cylinder heads (See

Applications below for specific descriptions). These intake manifolds are

designed for competition applications only. They are not intended to be used on the street as they do not have provisions for chokes, emission
components, etc.

NOTE: It is the responsibility of the end user to verify conformity to a particular racing

association’s rules regarding manifold dimensions, fitment to a template, etc.

•

APPLICATIONS:

2801/2802:

Manifolds are designed for use with Dart Big Chief or Profiler Raptor
Cylinder heads. #2801 fits standard 9.8” deck height blocks, while
#2802 fits tall 10.2” deck height blocks. These manifolds are
recommended for use on engines over 600 C.I.D.

2803/2804:

#2803 fits standard deck height blocks and #2804 fits tall deck
height blocks (using Dart Big Chief, or Brodix Big Duke Heads).
These manifolds are designed with a smaller runner cross section
for engines under 590 C.I.D., or 600+ C.I.D. engines designed for
peak power under 6500 rpm (such as marine applications).

2805/2806:

Manifolds are designed for 600 C.I.D. or larger engines, using
Brodix Big Duke cylinder heads They are similar to #2801/2802,
except they feature runner exits more closely matched to the Brodix
cylinder head. #2805 is designed for standard deck height blocks,
and #2806 is designed for tall deck height blocks.

•

CARBURETOR RECOMMENDATIONS:

Appropriate 4500 series racing carburetor.

•

CARBURETOR SPACERS:

Testing has shown, in certain applications, additional

torque is available with the use of a one-inch thick, open (not 4-hole) carburetor
spacer on Big Victor intake manifolds. Edelbrock spacer #8718 offers a closer
match to the semi-cloverleaf opening in the Victor Spread-Port manifold, and #8717
is a standard open, non-cloverleaf spacer.

•

PORT MATCH:

Port matching of each intake runner to the cylinder head port size

on all four sides of the runner exit is REQUIRED for best results. This would be the
floor, roof, and each sidewall per the included illustrations

(See Figure 1 and

Figure 2)

. Port locations and porting technique will vary by manufacturer. More

grinding may be necessary on the roof of the port than on the floor, or vice versa, depending on these variables. Any sharp edges left from port
runner enlargement should be radius blended to prevent high rpm air/fuel separation at the cylinder head. Due to the as-cast size of the Victor
Spread-Port manifold runners, very small amounts of material need to be removed to match the ports. No other modification or material removal
is necessary. Refer to illustrations for floor radius. Hard-roll polishing is acceptable, but substantial amounts of grinding away of manifold material
can impair its performance by greatly upsetting air/fuel distribution among cylinders.

Stock Height

Matched

to Head

Figure 1

Figure 2

Stock Height

1”-2” Back

From Exit

Roof

Floor

Stock Height