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AFR - Airflow Research 195cc LT1/LT4 Eliminator Street Aluminum Cylinder Heads SB-Chevy
033-1031
AFR - Airflow Research 1031 Details
Street CNC Porting LT1/LT4 Eliminator Cylinder Heads
Small Block Chevy 195cc LT1/LT4 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, 2.050'' 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 (if using non-self aligning rockers) Viton Valve Seals Hardened Spring Cups Intake Valve Seats Exhaust Valve Seats Bronze Valve Guides Small Block Chevy 195cc LT1/LT4 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 LT4 Spark Plug Starting Range AC FR3LS or 41629 Combustion Chambers 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
Specifications:
The Ultimate Bolt-on The AFR Emissions Legal (CARB EO #D-250-2 for engines up to 1994), 195cc intake port LT4 small block Chevy aluminum cylinder heads are available in an LT4 angle plug version. These heads feature a 58cc combustion chamber (can be special ordered 55 to 65cc) 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 valves with AFR's hardened ductile iron interlocking valve seats. The exceptional flow characteristics, ideal operating range of 2500 rpm to 6500 rpm (higher rpm ranges possible depending on combination of parts), 23° valve angle, and standard valve spacing make this the perfect street head for 350-383 ci engines. Designed specifically for 1996 Corvettes or LT4 manifold users. No special parts are required. Dual valve cover bolt pattern is standard. Exhaust port and bolt pattern are raised .100'' (3/32'') over GM L98 cylinder heads, this rarely affects header or chassis fitment. .
Emissions Legal Street Weapon!
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.
