SCOGGIN-DICKEY

800.456.0211
sdpc2000.com

The Scoggin-Dickey modified Vortec cylinder head was one of our price leaders at just $680 per pair. To allow the use of a 0.525-inch-lift hydraulic camshaft with these Vortec heads, Scoggin-Dickey adds high-performance late-model Z28 valvesprings with lightweight LT4 retainers and machines the valve guides for clearance. These heads produced an average torque number of 445 lb-ft, a large portion of it near the lower rpm band. Peak horsepower for this head ran in at 430, with an average of 392 at all measured points from 3,300 to 6,100 rpm. These heads make a great choice for a budget-built street car where good torque is needed. The use of these heads requires a special Vortec intake manifold and recommended head bolt kit. For our dyno run we used an Edelbrock Vortec Performer RPM Air Gap.

CATEGORY 1
MODEL: Cast-Iron Vortec GM Performance Parts, 170cc
PN: SD8060A
PRICE: $680/pair
Weight: 46 pounds each
True measured combustion chamber volume: 63 cc
True measured intake and exhaust port volume: 185 cc; 63 cc
Spring pressure: 70 lbs. on seat; 265 lbs. at 0.500-inch lift
installed height: 1.850 inch
Valve size: 1.94/1.50-inch
Intake flow at 0.400 lift: 212 cfm
Assembled, guide plates not offered
Airflow
Valve lift.050.100.200.300.400.500.600
Intake Corr test flow3057123174212210207
Exhaust Corr test flow1940100139153160162
POWER
Average torque:445 lb-ft
Average horsepower: 392 hp
RPMlb-ftHP
3,300469295
3,400471305
3,500474316
3,600481330
3,700484341
3,800487353
3,900489363
4,000489372
4,100486379
4,200483386
4,300481394
4,400476399
4,500473405
4,600467409
4,700462414
4,800455416
4,900450420
5,000445424
5,100440427
5,200434429
5,300427430
5,400417429
5,500409428
5,600399425
5,700389423
5,800380420
5,900370415
6,000360411
6,100351408