World Products 012150-1 - World Products SB-Chevy Sportsman-II Heads
World Products #955-012150-1
SB-Chevy Sportsman II Cast Iron Cylinder Head |
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World Products 012150-1 - World Products SB-Chevy Sportsman-II Heads Details
SB-Chevy Sportsman II Cast Iron Cylinder Heads - 72cc Combustion Chambers, Angle Plug
Applications: World has tested Sportsman-II heads in many applications including 375Hp 9:1 street engines; 450HP 9.8:1 street /strip engines; all the way to 940HP blown alcohol drag race engines. Material: High density cast iron Included In Assembly: Manley Street Flo stainless steel valves (1-piece forged, with undercut stems and swirl-polished heads), ring & band style valve seals, 1.250'' valve springs, Manley 7° chrome moly retainers, keepersand pushrod guide plates. NOTE:These specifications are for reference only. ALWAYS measure before machining.
Typical Application Street: 274 Cam: 230/236° .487''/.490'', Dart II Sportsman #955-061010 dual plane intake; 750 cfm carb, 1-3/4'' header. 430HP on 9.8:1 355; 480HP on 383 10.5:1 (varies with displacement and compression ratio).
Typical Application Drag Race: Modified 750 cfm carb, 276/284° roller cam, single plane plenum intake, 1-3/4''-plus header. MUST Upgrade to 1.550'' roller valve springs and 10° hardware. Up to 650HP normally aspirated depending on displacement and CR and porting.
Valve Seats: Integral intake,hardened steel exhaust
Valve Guides: Integral cast iron
Valve Spring Seats: Machined for 1.250'' springs
Valve Size: 2.020'' x 1.600''
Rocker Arm Studs: 3/8'' shank, screw-in style with hex shoulder furnished with assembly
Exhaust Flange: Stock locations, 7-bolt universal pattern
Head Gaskets: Fel-Pro #1003 ( 265-350 ) or equivalent
Puhshrods: Requires heat-treated pushrods. Use of 1.6 ratio rocker arms require elongation of pushrod holes.
Spark Plugs: Accepts 14mm .460'' reach tapered seat 5/8'' hex (Champion #670 or #802) or equivalent
Intake Gasket: Fel-Pro #1205 or equivalent
Exhaust Gasket: Fel-Pro #1404 or equivalent
Maximum Spring Seat Depth (from inside step): .030''
Maximum Spring Diameter: 1.550''
Approximate Milling Guidelines(varies with depth): .0065'' per cc
Maximum Flat Mill Depth (up to intake seats): .040''
Maximum Angle Mill ( approx. 50-52cc volume): .175'' depth
The Easiest Way to Bolt On 30-70HP! Continuosly improved since it's 1987 introduction, the World Products Sportsman II is still the industry's most popular cast iron high performance head. Featuring RightCast 200cc intake runners, Fast-Burn chambers and your choice of angled or straight plugs, they're good for 30-70 HP increases right out of the box. They are the aftermarket's only 50-state emissions legal cast iron high performance cylinder head (EO #D-343-1). You should also know that all World Products heads are percision CNC-machined, and indexed off the chambers to assure perfect alignment with the cylinders. Only World offers complete assemblies with genuine Manley stainless steel Street-Flo or RaceMaster valves and other quality components including springs, retainers, keepers, screw-in studs and guide plates. Material: High density cast iron Included In Assembly: Manley Street-Flo (-1 models) or Manley RaceMaster (-2 models) forged stainless steel valves with swirl-polished heads, ring and band-style seals, valve springs, Manley 7° chrome moly retainers, keepers and guide plates.
Valve Seats: Integral intake, hardened steel exhaust
Valve Guides: Integral cast iron
Valve Spring Seats: Machined for 1.250'' and 1.550'' springs
Valve Sizes: 2.020'' x 1.600''
Rocker Arm Studs: 3/8'' screw-in style with hex-shoulder
Accessory Flange: Stock locations, 7-bolt universal pattern
Head Gaskets: Fel-Pro 375-1003 or equivalent
Pushrods: Requires heat-treated pushrods. Use of 1.6 ratio rocker arms requires elongation of pushrod holes.
Spark Plugs: Accepts 14mm .460'' reach tapered seat 5/8'' hex (Accel 274 or 276, AC-Delco 43TS or 44TS or equivalent)
Intake Gasket: Fel-Pro 375-1205 or equivalent
Exhaust Gasket: Fel-Pro 375-1404 or equivalent
Maximum Valve Diameter: 2.100'' x 1.600'' or 2.080'' x 1.625''
Maximum Spring Seat Depth (from inside step): .030''
Maximum Spring Diameter: 1.550''
Approximate Milling Guideline (varies with depth): .0065'' per cc
Maximum Flat Mill Depth (up to intake seats): .040''
Maximum Angle Mill (approx. 50-52cc volume): .175'' depth
Note: Specs are for reference only. ALWAYS measure before machining.
