Page 162 - 2018 Racecar Engineering Engine Parts and Accessories Catalog

CYLINDER HEADS

Chevrolet Big Block 396-454 (Cont.)

Brodix SR20 Series Aluminum Heads BRO2208000
The Brodix SR20 cylinder head is the cutting edge of the conventional big block Chevy
style heads. Inspired by TPSA technology, the SR20 boasts a .500" raised CNC-ported
440cc intake port flowing 507 CFM and the exhaust 335 CFM right-out-of-the-box. The
newly designed 95cc combustion chamber houses a 2.400" intake and 1.800" exhaust
(11/32" stem diameter) valves. The intake valve angle of 20 degrees requires custom pis-
tons, Brodix valve covers, head studs, shaft rockers, and a Brodix intake manifold specifically designed for the SR20 heads.
Sold individually.
Intake Comb. Port Valve Intake Exhaust
Part No. Description Runner Chamber Type Angle Valve Valve
BRO2208000 Bare 440cc 95cc Rect 20°/13° 2.400" 1.800"
Assembled - 1.645" Spring,
BRO2208100 440cc 95cc Rect 20°/13° 2.400" 1.800"
315 Lbs. Seat Pressure/Titanium Retainers

Dart Heads Iron Eagle Head
Economical cast iron, rectangular port head is available with high velocity 308cc or big dis-
placement, high revving 345cc intake runners, raised exhaust ports, heart-shaped combus-
tion chambers, and hardened exhaust seats. Sold individually. DRT15100010
Intake Comb. Valve Intake Exhaust
Part No. Description Runner Chamber Port Type Angle Valve Valve
DRT15100010 Bare 308cc 119cc Rect 24°/15° 2.250" 1.880"
DRT15100111 Assembled, 1.550" Single Spring, 145 Lbs. Seat Pressure 308cc 119cc Rect 24°/15° 2.250" 1.880"
DRT15100112 Assembled, 1.550" Double Spring, 215 Lbs. Seat Pressure 308cc 119cc Rect 24°/15° 2.250" 1.880"
DRT15200030 Bare 345cc 119cc Rect 24°/15° 2.300" 1.880"
DRT15200132 Assembled, 1.550" Double Spring, 215 Lbs. Seat Pressure 345cc 119cc Rect 24°/15° 2.300" 1.880"
DRT15200136 Assembled, 1.625" Double Spring, 275 Lbs. Spring Pressure 345cc 119cc Rect 24°/15° 2.300" 1.880"
DRT15370030 CNC Ported - Bare - Iron 330cc 126cc Rect 24°/15° 2.300" 1.880"
CNC Ported - Assembled - 1.625" Dual Spring -
DRT15372136 308cc 126cc Rect 24°/15° 2.300" 1.880"
250 Lbs. Seat Pressure

Dart Heads Pro 1 Aluminum Head
Pro 1 head has rolled over valve angles, raised exhaust ports and fast-burn combustion
chambers. Available bare or fully assembled in three different intake runner sizes. Sold
individually. DRT19100112
Intake Comb. Port Valve Intake Exhaust
Part No. Description Runner Chamber Type Angle Valve Valve
DRT19100010 Bare 310cc 119cc Rect 24°/15° 2.250" 1.880"
Assembled, 1.550" Double Spring
DRT19100112 310cc 119cc Rect 24°/15° 2.250" 1.880"
275 Lbs. Seat Pressure
DRT19200010 Bare 325cc 119cc Rect 24°/15° 2.250" 1.880"
Assembled, 1.625" Double Spring
DRT19200116 325cc 119cc Rect 24°/15° 2.250" 1.880"
275 Lbs. Seat Pressure
DRT19300030 Bare 345cc 119cc Rect 24°/15° 2.300" 1.880"
Assembled, 1.625" Double Spring
DRT19300136 345cc 119cc Rect 24°/15° 2.300" 1.880"
275 Lbs. Seat Pressure
Dart SHP Aluminum Head DRT19900010
The NEW Dart SHP aluminum head features a compact heart-shaped 110cc combustion
chamber for increase compression on stock type big blocks. Features include; 2 degree
rolled valve angles, improved spark plug location, extra long intake valves, raised exhaust
ports, multi-angle intake and radiused hardened exhaust seats, long wear bronze guides, screw in
studs, hardened exhaust seats are all standard. Sold individually.
Intake Comb. Port Valve Intake Exhaust
Part No. Description Runner Chamber Type Angle Valve Valve
DRT19900010 SHP, Bare 275cc 110cc Oval 24°/15° 2.250" 1.880"
DRT19900070 SHP, Bare 275cc 110cc Oval 24°/15° 2.190" 1.880"

2018 ENGINE BUILDER CATALOG 161