You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
CHAMPIONSHIP ENGINE COMPONENTS<br />
MADE IN THE USA<br />
SHORT BLOCKS TOP KITS BLOCKS HEADS MANIFOLDS CRANKSHAFT ACCESS SBC LS BBC SBF HON COATINGS BILLET<br />
QUICK INFO >>><br />
Maximum Top Sportsman, Top Dragster, Pro<br />
Mod and Pro Street competition. Excellent with<br />
alcohol and nitrous, over 7,000 RPM, over 500<br />
cubic inches.<br />
18° 14°<br />
424cc 440cc<br />
CNC<br />
Big Chief heads have dominated in Sportsman<br />
through Pro Stock classes since their introduction,<br />
and we have continued to improve the<br />
design with the latest Pro Stock technology.<br />
With our sophisticated CNC machining programs,<br />
we can tailor a pair of Big Chief 18° or<br />
14° heads to fit your exact engine combination.<br />
Big Chief PRO1 18° and 14° head assemblies<br />
include hardened seats and stainless valves.<br />
Copper seats and Titanium valves are optional.<br />
Heads are sold individually.<br />
BIG CHIEF 18° 424cc CNC - ALUMINUM<br />
PART NO. CONFIGURATION CNC PORTING PORT VOL. VALVES SPRINGS CYL. BORE<br />
18000000 Bare Program 381 Rect. N/A N/A N/A N/A<br />
18000000S Solid Bare Program 381 Rect. N/A N/A N/A N/A<br />
18074030 Full Port Assembly Rect. 424cc 2.400”/1.900” Bare 4.500”<br />
18074136 Full Port Assembly Rect. 424cc 2.400"/1.900" 1.625"D 4.500"<br />
18075030 Full Port Assembly Rect. 424cc 2.400”/1.900” Bare 4.600”<br />
18075136 Full Port Assembly Rect. 424cc 2.400"/1.900" 1.625"D 4.600"<br />
BIG CHIEF 14° 440cc CNC - ALUMINUM<br />
PART NO. CONFIGURATION CNC PORTING PORT VOL. VALVES SPRINGS CYL. BORE<br />
18100000 Bare Program 3815 Rect. N/A N/A N/A N/A<br />
18100000S Solid Bare Program 3815 Rect. N/A N/A N/A N/A<br />
18174030 Full Port Assembly Rect. 440cc 2.400”/1.900” Bare 4.500”<br />
18174136 Full Port Assembly Rect. 440cc 2.400"/1.900" 1.625"D 4.500"<br />
18175030 Full Port Assembly Rect. 440cc 2.400”/1.900” Bare 4.600”<br />
18175136 Full Port Assembly Rect. 440cc 2.400"/1.900" 1.625"D 4.600"<br />
BIG BLOCK CHEVY<br />
CAST ALUMINUM CYLINDER HEADS<br />
Head part kits - see pages 118.<br />
BIG CHIEF 18° & 14° CNC SPECS<br />
Material:<br />
RMR Cast<br />
Aluminum Alloy<br />
Valve Angle: 18°/14°<br />
Intake Port Volume: 424/440cc CNC<br />
Intake Valve: 2.400”<br />
Exhaust Valve: 1.900”<br />
Chamber Volume: 87cc<br />
Intake Port Shape: Rectangle<br />
Port Location: Spread port<br />
FLOW DATA @ 28” WATER<br />
LIFT 18°/2.400" 14°/2.400" 1.900"<br />
INTAKE INTAKE EXHAUST<br />
.200” 158 154 158<br />
.300” 233 233 217<br />
.400” 296 296 264<br />
.500” 359 357 316<br />
.600” 403 410 326<br />
.700” 433 438 329<br />
.800” 452 454 337<br />
.900” 460 463 340<br />
Not intended for sale or use with pollution controlled vehicles.<br />
90<br />
248.362.1188 / DARTHEADS.COM Connect with us socially, search: DART MACHINERY
Change language