Edelbrock 2804, 2806, 2805, 2801, 2803 User Manual

	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 [e-mail].

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	Figure 1
	Cylinder heads. #2801 fits standard 9.8” deck height blocks, while	Roof
	#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	Stock Height
		1”-2” Back
	height blocks (using Dart Big Chief, or Brodix Big Duke Heads).
		From Exit
	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	Stock Height
	peak power under 6500 rpm (such as marine applications).
	2805/2806: Manifolds are designed for 600 C.I.D. or larger engines, using	Floor
	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.	Figure 2

• 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
		Stock Height
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	Matched
on all four sides of the runner exit is REQUIRED for best results. This would be the	to Head
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.

Catalog #2801, 2802, 2803, 2804, 2805, 2806		©2007 Edelbrock Corporation
Rev. 6/07 - RS/mc	1 of 2	Brochure #63-0339