World's SR Torquer provides up to 30HP over stock heads. The S/R Tourquer cylinder head is the preferred performance alternative to expensive OEM castings or junkyard rebuilds. These heads are designed with extra-thick decks and walls for improved reliability as well as equipped with hardened steel exhaust seats that are compatible with today’s unleaded gasolines. They also come with screw-in rocker arm studs for extra durability. Needless to say, the S/R Torquer is substantially more durable than OEM castings. They feature a a larger 2.02 Intake Valve and a 1.6 Exhaust Valve.
Valve cover rails have been raised and carefully machined to eliminate oil leaks and the heads can accommodate either early style perimeter or late model center bolt valve covers.
S/R Torquer Cylinder heads are fully 50-state emissions legal.
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TECHNICAL SPECS
Casting ID Number: I-052, I-058
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 (inconel exhaust valves on marine applications)
Valve Diameter: 2.020" intake, 1.600" exhaust (11/32" stem)
Rocker Arm Studs: Screw-in style
Rocker Arms: 1.5 ratio (use of 1.6 ratio will require elongation of pushrod holes)
Intake Runner: 170cc, standard port location
Exhaust Ports: 65cc, standard location
Combustion Chamber: 67cc or 76cc, straight 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 many oval tracks and sanctions as stock replacements. Check with rule book.
HEAD FLOW @ .500 LIFT
223 intake, 143 exhaust (Super Flow 1050)
235 intake, 151 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
S/R TORQUER
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 @ .560"
-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"
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