AFR 235cc SBC Eliminator Racing Cylinder Head
Our Mid-Sized 60/40 Powerhouse
With the price of big displacement SBC engines fraction of what they were years ago, the allure to go BIG is stronger than ever. To help quench the thirst of that large displacement monster AFR is proud to offer our largest direct bolt on 23° Chevy head yet. At 235 cc’s, anything under 400 inches can look the other way. It has the same geometry as our 227 head and will accept all the same rocker arms, stud girdles, etc. AFR offset stud girdles are the only special parts required (see footnotes here). Some applications require shaft mount rockers or .050 offset intake rocker arm for durability and reliability of valve train components. Standard rocker arms can be used but the intake rocker arm will be at a slight angle and the roller tip will not be perfectly centered on the valve. It will feature a larger 2.125 diameter intake valve. Exhaust valve diameter stays the same with a little more flow from its larger runner volume. The big news is our all new intake port design which pushes this standard location intake port over 340 CFM’s! That’s 18° territory and this head should be able to generate power figures that rival those heads (725+ HP). This head is not for every large displacement combination so if you’re unsure whether this is the right AFR head for you, we always encourage you to contact us directly.
235cc 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
3-angle Radiused Valve Job
AFR #7253
Bead Lock Intake Valve, 2.125" x .100" long
AFR #7254
Bead Lock Exhaust Valve, 1.600" x .100" long
AFR #8000
1.550" OD Roller Dual Valve Spring, 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 1.310 x 2.180 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
70cc or 80cc
Combustion Chambers
Can be cut to 1.680, no deeper
Spring Pocket
60/40
Valve Spacing
Shaft Mount
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 instake gasket. |
