| 175cc As-Cast Head Flow Chart | |||||||
| .200 | .300 | .400 | .500 | .550 | .600 | .650 | |
| Int | 136 | 190 | 234 | 252 | 257 | 259 | 262 |
| Exh | 117 | 156 | 182 | 186 | 190 | 201 | 203 |
Test conducted at 28" of water (pressure) on Superflow 600
Bore Size: 4.060", 3/4" radius plate exhaust, 1 3/4" curved pipe
| Basic Package Components | Part # |
| As Cast Combustion Chambers As Cast Exhaust Ports As Cast Intake Ports 3-angle Valve Job |
|
| 8mm Bead Lock Intake Valve, 2.020" x 5.000" Overall Valve Length | AFR #7257 |
| 8mm Bead Lock Exhaust Valve, 1.600" x 5.030" Overall Valve Length | AFR #7254 |
| Melling Racing Spring 1.290" OD Hydraulic Roller Dual Valve Spring, 140 lbs on seat, .600" maximum lift, Max RPM 6300-6500 (upgrades available) | AFR #8017 |
| 7° Chrome Moly Retainers 1.245" O.D x .885" I.D x .655" I.D | AFR #8514 |
| 7° Chrome Moly Bead Lock Valve Keepers | AFR #9007 |
| Viton Valve Seals .675" O.D x .513" I.D | AFR #6614 |
| Hardened Valve Spring O.D Locator 1.380" O.D x .570" I.D | AFR #8042 |
| Specifications, Features, and Optional Supporting Components |
| Head Material |
Aluminum |
| Intake Port Volume | 175cc |
| Intake Port Dimension | 2.250" x 1.150" |
|
Intake Port Location
|
Stock |
| Exhaust Port Volume | 80cc |
| Exhaust Port Dimension | 1.750" H x 1.250" W |
| Exhaust Port Location |
Stock |
| Combustion Chamber Size | 62cc |
| Valve Angle | 18° |
| Important: Do not port match your intake manifold to Fel-Pro gasket as it does not precisely fit the AFR head. | |
| Exhaust Port Gasket |
Felpro #1213 |
| Head Gasket, 302/351W, Fel-Pro #1011-1 |
AFR #6808 |
| Head Bolt |
ARP #144-3601 |
| Flat Mill |
.006" per cc 54cc Max (from 64cc) |
| Suggested Manifold | Edelbrock 2176 |
| Spark Plug Starting Range | Autolite 3924 |
