AFR 220cc SBC Eliminator Racing Cylinder Head
Our Ultimate standard valve and stud location offering
AFR is reviving its popular 220cc moniker due to overwhelming request from customers for a larger bolt on standard valve location head. Unlike the previous 220, the new Eliminator version requires no special parts (see footnotes here). Valves and studs are in stock GM L98 locations just like our very popular, 180, 195, and 210 series heads. They do not require offset rockers of any kind yet are still able to muster flow numbers that are in raised runner head territory. A 325 CFM head that is perfect for someone wanting to retain all their standard components while still having the airflow to reach that elusive 700 HP mark in aggressive drag race trim. Displacement ranging from a high RPM 350 to a 427 CID with natural applications in the various sportsman classes, bracket/drag cars, oval track, and larger displacement street machines with typical operating ranges between 4000 to 8000 RPM depending on application. Getting this much flow from a stock geometry 23° head means they will only be available in fully optimized "competition" CNC porting. As always, they come with AFR’s trademark ¾” thick head deck (ideal for nitrous or blower applications). Standard valves are lightweight 8mm 2.100 intake and 1.600 exhaust with AFR's hardened ductile iron interlocking seats. Dual valve cover bolt pattern is standard. Exhaust port is raised .250 over GM L98.
220cc SBC Aluminum Cylinder Head Flow Chart
Tested on 4.125 Bore
Basic Package Components
100% CNC Ported Combustion Chambers
100% CNC Ported Exhaust Ports
100% CNC Ported Intake Ports
Competition 5-angle Valve Job
AFR #7256
Bead Lock Intake Valve, 2.080" x .100" long
AFR #7254
Bead Lock Exhaust Valve, 1.600" x .100" long
AFR #8000
1.550" OD Roller Dual Valve Spring w/ dampener, 225 lbs on seat, .710" maximum lift
Specifications, Features, and Optional Supporting Components
65-70 ft. lbs
Head Torque
55-60 ft. lbs
Rocker Stud Torque
AFR #6820
Intake Gasket 1.280x2.090 w/ 3/8" radius, Fel-Pro #1206
Important: Do not port match your intake manifold to Fel-Pro gasket as it does not precisely fit AFR heads.
AFR #6310
SB Chevy Head Bolt Kit, ARP #134-3701
AFR #6305
SB Chevy Head Stud Kit, 12 Point Nuts, ARP #234-4301
Autolite 3910
Spark Plug Starting Range
65cc or 75cc
Combustion Chambers
Can be cut to 1.750, no deeper
Spring Pocket
Standard GM L98
Valve Spacing
Standard GM L98
Rocker Arms
23°
Valve Angle
.008" per cc
Angle Mill (Milling options available)
.006" per cc
Flat Mill (Milling options available)
Note: Milling head deck will affect flow numbers. Angle mills might require .120 thick intake gasket. |
