AFR 908 - Small Block Chevy 180cc LT1 Eliminator Street Aluminum Cylinder Heads-Pair
AFR - Air Flow Research #908
| Small Block Chevy 180cc LT1 Eliminator Basic Package Components | |
| 100% CNC Ported Combustion Chambers | |
| 100% CNC Ported Exhaust Ports | |
| 100% CNC Ported Intake Ports | |
| Competition 5-Angle Valve Job | |
| Intake Valve, 2.020'' x 4.903'' o.a.l. | |
| Exhaust Valve, 1.600'' x 4.955'' o.a.l. | |
| 1.290'' OD Hydraulic Roller Dual Valve Spring, 135 lbs. on seat, .600'' maximum lift, max RPM 6300-6500 | |
| 7º Titanium Retainers | |
| 7º Valve Locks | |
| 3/8'' Rocker Studs | |
| Adjustable 5/16'' Guide Plates | |
| Viton Valve Seals | |
| Hardened Spring Cups | |
| Intake Valve Seats | |
| Exhaust Valve Seats | |
| Bronze Valve Guides | |
| Small Block Chevy 180cc LT1 Eliminator Street Head Specifications | |
| Head Torque w/Moly Lube | 65-70 Ft. Lbs. |
| Rocker Stud Torque | 55 Ft. Lbs. |
| Intake Port Gasket | Fel-Pro 375-1284 - DO NOT PORT MATCH Intake Manifold to Fel-Pro Gasket. |
| Exhaust Port Gasket | Fel Pro 375-1404 |
| Head Gasket | 350ci Fel Pro 375-1074 |
| Head Bolts & Studs | Standard ARP |
| Head Bolt Washers | Manley Standard |
| Stud Girdle | Standard GM L98 |
| Suggested Manifold | GM LT1 |
| Spark Plug Starting Range | AC FR3LS or 41629 |
| Combustion Chambers | 55 to 65cc |
| Spring Pocket can be cut to 1.625, no deeper. | |
| Valve Spacing | Standard GM L98 |
| Rocker Arms | Standard GM L98 |
| Valve Angle | 23° |
| Angle Mill | .008'' per cc |
| Flat Mill | .006'' per cc |
The AFR Emissions Legal (CARB EO #D-250-2 for engines up to 1994), 180cc intake port LT1 Small Block Chevy cylinder heads are available in the LT1 angle plug version only. These heads feature a 55cc to 65cc combustion chamber with a 64cc exhaust port and a 3/4" thick head deck (ideal for nitrous or blower applications). Standard valves are lightweight 8mm diameter stem, 2.020'' intake and 1.600'' exhaust with AFR's hardened ductile iron interlocking valve seats. The exceptional flow characteristics, ideal operating range of idle to 6000 rpm (higher rpm ranges possible depending on combination of parts), 23° valve angle, and standard valve spacing make this the perfect street cylinder head for 350-383ci performance engines and is specifically designed for 1992-95 Corvettes and 1993-97 Camaros. No special parts are required (see footnotes here). Dual valve cover bolt pattern is standard. Exhaust port and bolt pattern are raised 3/32" over GM L98 cylinder heads, this rarely affects header or chassis fitment. Made in USA.
Installation Note: Hydraulic roller cams typically experience valve float at 6200-6400 rpm because of their fast ramp rates. AFR suggest you upgrade your springs to AFR part number 033-8605, 1.270'' O.D. with higher spring pressures and use our Patented ''Hydra Rev Kit'' to reduce chances of valve float associated with rpm 6200 or higher.
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