|
|
 |
| CYLINDER HEADS - Chevy - Big Victor |
 |
|
 |
Big Victor Spread-Port 18° CNC
Intended for high output, large cubic inch B/B Chevy racing engines with 4.84" bore spacing, this new Big Victor Spread-Port CNC head is an improvement over existing 18° designs, such as the Big Chief & Big Duke. The casting is made from A-356 aluminum and is Hot Isostatic Pressing processed (HIP) for superior strength and durability, dimensional stability, and exceptional finish quality. These heads feature CNC ported spread intake ports and raised exhaust runner design for improve flow efficiency. The chambers are also fully CNC ported and Edelbrock includes extra material in the deck to allow fine tuning of the combustion chamber design if desired. Improved Valvetrain Stability - Edelbrock and Pat Musi worked with Jesel to improve the valvetrain geometry, delivering Pro-Stock level technology on engines up to 10,000 rpm. Jesels shaft-mounted system, #KPS-381754, is made from lightweight 7000 series aluminum and features a one-piece stand design that pairs the intake and exhaust stands for valvetrain stability. The intake features a 7.820" long fulcrum, available in 1.60:1 - 1.95:1 rocker ratios; the exhaust features a 2.000" long fulcrum and available 1.60:1 - 2.00:1 rocker ratios. Guides and seats are included but not installed. Requires Edelbrock valve covers #4259. Match with Edelbrock Victor series manifolds #2801, #2802, #2803 and #2804 for the ultimate Big-Block Chevy spread-port engine combo.
Features:
- Available CNC ported or Pro-Port Raw
- Extra thick deck
- "Hipped" for superior strength
- 18° x 4.0° intake | 9° x 3.9° exhaust
- 2.45" intake | 1.85" exhaust (prepped version)
- Intake Runner (CNC): 442cc (lh) | 451cc (rh)
- Exhaust Runner (CNC): 189cc
- Valves, springs and retainers not included
- Valvetrain: Jesel KPS-381754
- Use with Edelbrock valve covers #4259
Cylinder Head Specifications |
| Combustion chamber volume |
94cc |
| Intake runner volume |
442 (lh) / 451 (rh) |
| Exhaust runner volume |
189cc |
| Intake valve diameter |
2.45" (Valves Not Included) |
| Exhaust valve diameter |
1.85" (Valves Not Included) |
| Valve stem diameter |
N-a |
| Valve guides |
Mananese Bronze |
| Deck thickness |
--- |
| Valve spring diameter |
Pocket diameter 1.76" (springs not included) |
| Valve spring maximum lift |
Springs not included |
| Rocker stud |
Use Jesel KPS-381754 shaft-mount |
| Guideplate |
N-a |
| Pushrod diameter |
--- |
| Valve angle |
18º x 4.0º intake | 9º x 3.9º exhaust |
| Exhaust port location |
--- |
| Spark plug fitment |
14mm x 3/4 reach, gasket seat |
| Made In |
USA |
|
|
| Description |
Bare |
Complete |
| Big Victor CNC |
617569* |
N/A |
|
Flow Numbers as tested by Edelbrock's SuperFlo SF-1020 flow bench @ 28" H2O
| Valve Lift |
.400" |
.500" |
.600" |
.700" |
.800" |
.900" |
| Intake |
294/284 |
360/349 |
414/411 |
457/456 |
482/487 |
480/486 |
| Exhaust |
230 |
258 |
281 |
302 |
319 |
324 |
|
|
BIG VICTOR PRO-PORT FOR B/B CHEVY
This Pro-Port Raw head is a semi-finished version of the Big-Victor spread-port designed for professional cylinder
head porters. The casting is made from A-356 aluminum and is Hot Isostatic Pressing (HIP) processed for superior
strength and durability, and exceptional finish quality. Features include 4.84" bore spacing, undersized intake and
exhaust ports and un-machined combustion chambers. The chambers 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-381754,
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 7.820" 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.
Cylinder Head Specifications |
BIG VICTOR PRO-PORT RAW
| Chamber Size (A) |
Int. Port Dim. (B) |
Exh. Port Dim. (B) |
Valve Sizes in/ex, (C) |
Part No. (single) |
HIP’d |
| 70cc |
1.53" x 2.14" |
1.84" x 1.50" |
2.50/1.96" |
N/A |
777569 |
|
|
AMC
Small Block
