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> SPORTSMAN II Iron Heads
| SPORTSMAN II Iron Heads |
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The first true aftermarket performance cylinder head, good for 30-70HP over stock, and emissions legal! The industry’s most popular true high performance cast iron cylinder head has been continuously improved since its introduction over 20 years ago. With 200cc intake and 69cc exhaust ports, World’s SPORTSMAN II heads offer 30-70 horsepower gains over OEM heads, yet are 50-state emissions legal (E.O. #D-343-1). World has expanded its selection of SPORTSMAN II heads to include special marine versions equipped with 10° valve locks, Nitrile umbrella seals and high-temp inconel exhaust valves.
- IMCA
Approved by The Inl. Motor Contest Association.
- WISSOTA
Approved for use by The Amsoil Dirt Track Series.
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TECHNICAL SPECS
Casting ID Number: I-037
Material: High density cast iron
Valve Seats: Intake (integral), exhaust (hardened)
Valve Guides: Integral cast iron
Spring Seats: Machined for 1.560" and 1.250"
Valves: Manley stainless steel valves in assemblies
Valve Diameter: 2.020"" intake, 1.600" exhaust (11/32" stem)
Guide Plates: Stock
Rocker Arm Studs: Screw-in style
Rocker Arms: 1.5 ratio (use of 1.6 ratio will require elongation of pushrod holes)
Intake Runner: 200cc, standard port location
Exhaust Ports: 69cc, standard location
Combustion Chamber: 64cc or 72cc, straight or angled plug orientation
Spark Plug: 14mm 5/8" .460" reach tapered style. Accel 276 or 276S or equivalent.
Valve Job: Multi-angle intake and radiused exhaust
Valve Cover Rail: Raised w/ perimeter and center bolt pattern
Valve Angle: Stock 23°
Accessory Bolt Holes: Stock
50-State Emissions legal
Accepted by most oval tracks and sanctions as stock replacements. Check with rule book..
HEAD FLOW @ .600 LIFT
245 intake, 165 exhaust (Super Flow 1050)
260 intake, 176 exhaust (Super Flow 600)
All heads flowed with a standard .750" intake plate, without exhaust tube, and 28" of water.
CLICK HERE FOR COMPLETE HEAD FLOW DATA ON ALL OUR HEADS
SPORTSMAN II
HEAD ASSEMBLY BUYING GUIDE
Use this guide to match your Cam Spring Specs to our Assembled Heads & choose which assembly you need from the choices below. Please Note: Bare Heads contain no Valves. |
-1 Assembled Heads: Hydraulic Flat Tappet Cam
1.250": 100 lbs. @ 1.810", 300 lbs. @ 1.250", coil bind @ 1.200", max lift
MAX LIFT
@ .570""
-2 Assembled Heads: Mech. Flat Tappet or
Hydraulic Roller Cam
1.437": 125 lbs. @ 1.850", 340 lbs. @ 1.210", coil bind @ 1.160"
MAX LIFT @ .600"
-3 Assembled Heads: Solid Roller Cam
1.550": 200 lbs. @ 1.900", 480 lbs. @ 1.200", coil bind @ 1.150"
MAX LIFT @ .700" |
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