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| CYLINDER HEADS - Pro-Port™ Raw & Semi-Finished Heads - Big Victor 12° / 14° / 18° For Big-Block Chevy |
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Big Victor 12° / 14° / 18° For Big-Block Chevy Applications |
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| The Big Victor 12° and 14° designs offer improved air flow and power compared to existing 18° designs. Making an already proven casting and design even better then before. Both of these cylinder heads also include the same redesigned valvetrain geometry for improved stability, delivering Pro-Stock level technology on engines up to 10,000 rpm. Requires the use of a Jesel or T&D shaft-mounted rocker system. Requires Edelbrock valve covers #4259 or other options manufactured by Moroso. Compatible with most 11°, 12° and 14° Big Chief style pistons. Match with Edelbrock Big Victor and Big Victor 2 Spread-Port intake manifolds for the ultimate big-block Chevy spread-port combinations.
Big Victor 18° heads are compatible with most 18° Big Chief style pistons. Edelbrock and Pat Musi worked with Jesel to develop a new shaft-mounted rocker system designed specifically for these heads that greatly improves valvetrain geometry. Jesel's shaft-mounted system (#KPS-387154) features a one-piece stand design with paired intake and exhaust stands for valvetrain stability. This is the same technology used on Pro-Stock race engines, providing stability up to 10,000 rpm. The intake features 1.820" long fulcrum available in 1.60:1 - 1.95:1 rocker ratios; the exhaust features 2.000" long fulcrum and 1.60:1 - 2.00:1 rocker ratios. Guides and seats are included but not installed.
Requires: Edelbrock valve covers #4259, valve cover gaskets #7559 and intake gasket #7245.
- Semi-finished versions of the Big-Victor spread-port design for professional cylinder head porters
- Castings are made from A-356 aluminum and are Hot Isostatic Pressing (HIP) processed for superior strength, durability and exceptional finish quality
- They are intended for high output, large cubic inch big-block Chevrolet racing engines withconventional 4.84" bore spacing
- Features include undersized intake and exhaust ports and un-machined combustion chambers
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| * Click on part number to see image |
CHEVY SERIES: BIG VICTOR 12° / 14° / 18° PRO-PORT RAW
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| Description |
Chamber
Size (A) |
Part# |
HIP'd |
Angle |
Intake
Port Entry |
Exhaust
Port Exit |
Valve Sizes (B)
Intake | Exhaust |
Valve Pierce Points (X,Y)
Intake | Exhaust |
Valve Spacing |
Valve Seats |
Valve Guides |
| Big Victor |
N/A |
618269* |
Yes |
12° |
1.53" x 2.14" |
1.84" x 1.50" |
2.45" / 1.85" |
(-0.854", 0.455") (1.120",-0.420") |
N/A |
N/A |
N/A |
| Big Victor |
N/A |
618369* |
Yes |
14° |
1.53" x 2.14" |
1.84" x 1.50" |
2.45" / 1.85" |
(-0.854", 0.455") (1.120",-0.420") |
N/A |
N/A |
N/A |
| Big Victor |
70cc |
777569* |
Yes |
18° |
1.53" x 2.14" |
1.84" x 1.50" |
2.50" / 1.96" |
(-0.925", 0.215") (1.120",-0.420") |
N/A |
Included |
Included |
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AMC
NHRA Accepted Heads
Small Block Chevy
