CALL SHANON AT 507 445 3235 WITH ANY QUESTIONS.
Our 235cc "Competition" heads come with 100% CNC machined intake runners, exhaust ports and combustion chambers. Equipped with Titanium retainers and high quality components, featuring a 60/40 valve spacing which requires shaft mounted rocker arms for optimum valve train geometry (can be used with .050 offset intake rockers for drag race only applications).
| 235cc Aluminum SBC Cylinder Heads | |||
|---|---|---|---|
| Part # | Exhaust Port | Porting Finish | Combustion Chamber |
| 1132-TI | Stock | Competition | 70cc |
| 1130-TI | Stock | Competition | 80cc |
| 1134-TI | Spread Port | Competition | 70cc |
| 1136-TI | Spread Port | Competition | 80cc |
Click part # to add product to your cart
| 235cc Race Head Flow Chart | |||||||||
| .200 | .300 | .400 | .500 | .550 | .600 | .650 | .700 | .800 | |
| Int | 159 | 221 | 270 | 305 | 316 | 324 | 330 | 334 | 340 |
| Exh | 120 | 175 | 214 | 235 | 242 | 247 | 251 | 254 | 256 |
Test conducted at 28" of water (pressure) on Superflow 600
Bore Size: 4.155", 3/4" radius plate exhaust, 1 7/8" curved pipe
| Included Components | ||
| 100% CNC Ported Combustion Chambers | ||
| 100% CNC Ported Exhaust Ports | ||
| 100% CNC Ported Intake Ports | ||
| Competition 5-angle Valve Job | ||
| 8mm Bead Lock Intake Valve, 2.125" x 5.00" long |
7253
|
|
| 8mm Bead Lock Exhaust Valve, 1.600" x 5.030" long |
7254
|
|
| PAC Racing Springs 1.550" OD Solid Roller Dual Drag Race Spring, 250 lbs on seat, .800" maximum lift, Max RPM 8000-8200 |
8001
|
|
| 10° Titanium Retainers 1.490" O.D x 1.115" I.D x .745" I.D |
8505
|
|
| 10° Bead Lock Valve Keepers with lashcap recess |
9009
|
|
| ARP 7/16" Rocker Studs |
6405
|
|
| Adjustable 5/16" Guide Plates |
6103
|
|
| Viton Valve Seals .600" O.D x .495" I.D |
6612
|
|
| Hardened Valve Spring I.D Locator 1.550" O.D x .780" I.D |
8048
|
|
| Ductile Iron Intake Valve Seats 2.200" O.D x 1.750" I.D x.375" Deep |
9060
|
|
| Ductile Iron Exhaust Valve Seats 1.696" O.D x 1.325" I.D x .305" Deep |
9070
|
|
| 8mm Bronze Valve Guides .502" O.D x 2.100" O.A.L |
9051
|
|
| Recommended Components: | |
| 1.5 T&D Shaft Mount w/ .450" off-set |
6062
|
| 1.6 T&D Shaft Mount w/ .450" off-set |
6063
|
| 1.6 Stud Mount Rocker Arms, Hardland Sharp .050 offset |
6036
|
| 1.5 Stud Mount Rocker Arms, Hardland Sharp .050 offset |
6035
|
| Intake Gasket 1.310 x 2.180 w/ 3/8" radius, Fel-Pro #1206 |
6820
|
| Important: Do not port match your intake manifold to Fel-Pro gasket as it does not precisely fit AFR heads. | |
| Exhaust Port Gasket, Fel-Pro #1405 |
6835
|
| Head Gasket, 350cid Fel-Pro #1004 |
6801
|
| Head Gasket, 400cid Fel-Pro #1014 |
6802
|
| SB Chevy Head Bolt Kit, ARP #134-3701 |
6310
|
| SB Chevy Head Stud Kit, 12 Point Nuts, ARP #234-4301 |
6305
|
| Head Bolt Washers, Manley |
6320
|
| Stud Girdle AFR Offset |
6208
|
| Suggested Manifold |
AFR Titan TXR #4801
|
| Suggested Manifold |
AFR Titan TXS #4802
|
| Spark Plug Starting Range |
Autolite 3922
|
| Specifications & Features: | |
| Material |
A356 Aluminum
|
| Intake Port Volume |
235cc
|
| Intake Port Dimension |
2.200" H x 1.290" W 5/16 Radius
|
| Intake Port Location |
Stock
|
| Exhaust Port Volume |
80cc
|
| Exhaust Port Dimension |
1.430" H x 1.540" W
|
| Exhaust Port Location |
.250" Raised
|
| Combustion Chamber Size |
70cc or 80cc
|
| Valve Cover Bolt Pattern |
Perimeter Bolt
|
| Valve Angle |
23°
|
| Valve Spring Pocket Diameter |
1.580" O.D
|
| Max Valve Spring Pocket Machining |
1.680" O.D
|
| Warning: Do not machine spring pad any deeper. | |
| Deck Thickness |
.750"
|
| Minimum Bore Diameter |
4.000"
|
| Flat Mill |
.006" per cc 65cc Maximum
|
| Angle Mill |
.009" per cc 60cc Maximum
|
| Note: Angle mills might require .120" Thick intake gasket. | |
| Minimum Cross Sectional Area |
2.470 sq. in.
|
| Spark Plug Dimensions |
14mm x .750" w/Gasket Seat
|
| Carb EO# |
Non Emissions Compliant
|
SHIPS IN THE LOWER 48 STATES FREE!
CALL SHANON AT 507 445 3235 WITH ANY QUESTIONS.
CONTACT US THE PRICE IS NEGOTIABLE BEST OFFER
Warning: May cause cancer and reproductive harm.
