2018_DartCatalog_Final_compressed

QUALITY STRENGTH PERFORMANCE SINCE 1981
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Maximum Top Sportsman, Top Dragster, Pro
Mod and Pro Street competition. Excellent with
alcohol and nitrous, over 7,000 RPM, over 500
cubic inches.
An updated Dart Big Chief 385 program
incorporates a 2.500” intake valve for a
dramatic increase in air flow.
Big Chief heads have dominated in Sportsman
classes since their introduction, and
we have continued to improve the design
with the latest Pro Stock technology.
With our sophisticated CNC machining
programs, we can tailor a pair of Big Chief
14° CNC heads to fit your exact engine
combination.
Copper seats are standard and assemblies
come with Titanium valves.
Heads are sold individually.
14°
433cc
CNC
BIG CHIEF 14° 433cc CNC - ALUMINUM
BIG BLOCK CHEVY
CAST ALUMINUM CYLINDER HEADS
PART NO. CONFIGURATION CNC PORTING PROGRAM PORT VOL. VALVES SPRINGS CYL. BORE
18200000 Bare Head No Porting 384
18275070 Bare Head Full Port 384 433cc 2.470"/1.800" 4.600"
18275179 Assembly Full Port 384 433cc 2.470"/1.800" 1.650"T 4.600"
18300000 Bare Head No Porting 385
18375080 Bare Head Full Port 385 433cc 2.500"/1.800" 4.600"
18375189 Assembly Full Port 385 433cc 2.500"/1.800" 1.650"T 4.600"
BIG CHIEF 14° 433cc CNC SPECS
Material:
RMR Cast
Aluminum Alloy
Valve Angle: 14°
Intake Port Volume: 433cc CNC
Intake Valve: 2.470”/2.500”
Exhaust Valve: 1.800”/1.850”
Chamber Volume: 86cc
Intake Port Shape: Oval
Port Location: Spread port
FLOW DATA @ 28” WATER
LIFT 2.470” 2.500” 1.800”
INTAKE INTAKE EXHAUST
.200” 164 169 129
.300” 254 251 182
.400” 333 330 218
.500” 398 395 251
.600” 446 447 288
.700” 482 499 316
.800” 493 523 338
.900” 495 525 349
SHORT BLOCKS TOP KITS BLOCKS HEADS MANIFOLDS CRANKSHAFT ACCESS SBC LS BBC SBF HON COATINGS BILLET
Not intended for sale or use with pollution controlled vehicles.
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