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Victor Jr. 24° Rectangle Port - 300cc
This 24° is the latest B/B Chevy head from Edelbrock. Starting with an A356 aluminum casting - heat treated to T6 spec, they feature an extra thick deck and extra material in the spring pockets for a heavy-duty casting that can be used with high-lift cam and heavy spring combinations. Edelbrock equips the complete heads with your choice of spring packages to suit hydraulic or mechanical roller cams. Choose a hydraulic spring package for flat tappet or hydraulic roller cams up to .700" lift. Mechanical cam spec heads include Manley dual-spring valve springs & titanium retainers good for up to .880" lift. The 300cc rectangle ports produce impressive flow and great power on competition big-blocks up to 510 c.i.d. with 4.310" or larger bore. Exhaust port exits are raised .534" to greatly improve exhaust flow and power. Two combustion chambers are offered to meet the desired compression ratio.
Cylinder Head Specifications |
| Combustion chamber volume |
106cc & 118cc |
| Intake runner volume |
300cc |
| Exhaust runner volume |
128cc |
| Intake valve diameter |
2.25" |
| Exhaust valve diameter |
1.90" |
| Valve stem diameter |
11/32" |
| Valve guides |
Manganese bronze |
| Deck thickness |
9/16" |
| Valve spring diameter |
1.550"/1.635" |
| Valve spring maximum lift |
.700"/.880" |
| Rocker stud |
7/16" |
| Guideplate |
Hardened steel |
| Pushrod diameter |
3/8" |
| Valve angle |
24° |
| Exhaust port location |
Raised .534" |
| Spark plug fitment |
14mm x 3/4 reach, gasket seat |
| Made In |
USA |
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Technical Notes: Matching stud girdle #7797 must be used with stud mounted rocker arms. These heads require the use of a 14mm x 3/4" reach, flat gasket spark plug with a heat range appropriate to your application. |
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| Victor Jr. 24° with 106cc Combustion Chamber |
Bare (Single) |
Complete (Single) |
| Victor Jr. 24° with 106cc Combustion Chamber (with springs for hydraulic flat tappet cams) |
N/A |
77489* |
| Victor Jr. 24° with 106cc Combustion Chamber (with springs for hydraulic roller cams) |
N/A |
77485* |
| Victor Jr. 24° with 118cc Combustion Chamber (with springs for hydraulic flat tappet cams) |
77469* |
77479* |
| Victor Jr. 24° with 118cc Combustion Chamber (with springs for hydraulic roller cams) |
77469* |
77475* |
| Victor Jr. 24° with 118cc Combustion Chamber (with springs for mechanical roller cams) (up to .880" lift) |
77469* |
77459* |
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Flow Numbers as tested by Edelbrock's SuperFlo SF-1020 flow bench @ 28" H2O
| #77479 | #77459 |
| Valve Lift |
.100" |
.200" |
.300" |
.400" |
.500" |
.600" |
.700" |
| Intake |
72 |
140 |
2130 |
273 |
318 |
342 |
346 |
| Exhaust |
64 |
122 |
167 |
199 |
223 |
240 |
251 |
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AMC
Small Block
