Edelbrock Heads Flow Chart

Intake Flow
LiftStockPortedPorted w/28°
Back-Cut
.100676973
.200136137145
.300194202212
.400243251254
.500264275281
.600278291293
.700278300300

Exhaust Flow
LiftStockPorted
.1005856
.200114117
.300147154
.400182192
.500202212
.600214227
.700223238

Note: When box-stock, the intake flow stalled at 0.600 inch lift. Ported, the intake flow increased at 0.700 inch lift. Back-cutting the intake valve improved the low lift flow. This modification promotes better throttle response and drivability.

SOURCE
COMP Cams Edelbrock Corporation
2700 California St.
Torrance
CA  90503
310-782-2222
www.edelbrock.com
Ray Barton Racing Engines
Robesonia
PA
6-10/-693-5700
raybarton.com
JE Pistons
Milodon
2250 Agate Ct.
Simi Valley
CA  93065
805-577-5950
www.milodon.net
Automotive Racing Products (ARP)
531 Spectrum Circle
Oxnard
CA  93030
805-278-7223
ATI
Baltimore
MD
800-284-3433
www.atiracing.com
Eagle Specialty Products
Southaven
MS
6-62/-796-7373
eaglerod.com
Clevite 77, Dana Corporation
8-00/-637-7654
clevite.com