AFR 235cc SBC Racing Cylinder Head
***AFR Competition Port 235's!***
We have: 1130's in both large (80) and small (70) chambers in stock!
If there's another part number please inquire, we carry a FULL line of AFR products!
AFR 235cc SBC Eliminator Racing Cylinder Head
The Nastiest 23°Standard Port Head
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 335 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.
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.
Autolite 3910 Spark Plug Starting Range
70cc or 80cc Combustion Chambers
Can be cut to 1.575, 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 instake gasket.
This product was added to our catalog on Thursday 06 August, 2009.