Page 7 of Cylinder Heads by Edelbrock

index qwikdata shocks suspension exhaust access water pumps nitrous cams access heads efi manifolds install items gaskets fuel pumps carbs access crate engines superchargers kits power pkg cylinder heads victor jr 23° s/b ls1 chevy s/b chevy competition ultra high performance · affordable maximum power head for competition and ultra high-performance street · 530-580 hp potential out-of-the-box for a cost effective race-winning set-up · 64cc chambers yield about 12.5:1 compression with a 12cc domed piston in a 350 v8 · accepts standard 23° valvetrain hardware victor jr 23° #77619 dyno test 360-inch engine 12.5:1 compression 464 ft/lbs of torque and 540 hp 31 hp more than the leading competitor s as cast head victor jr 23° heads bare or with valves only chamber size intake port size valve sizes in/ex bare single with valves single 70cc 215cc 2.08 1.60 77639 77649 64cc 215cc 2.08 1.60 77569 77579 victor jr 23° complete heads for mechanical flat tappet or hydraulic roller cams chamber size intake port size valve sizes in/ex bare single complete single 70cc 215cc 2.08 1.60 n/a 77619 64cc 215cc 2.08 1.60 n/a 77589 victor jr 23° complete heads for mechanical roller cams chamber size intake port size valve sizes in/ex bare single complete single 70cc 215cc 2.08 1.60 n/a 77629 64cc 215cc 2.08 1.60 n/a 77599 note check cam manufacturer s specs for compatibility with valve springs see page 170 for spring rates important notes for s/b chevy heads · see chart on pages 168-169 for specs on all heads use edelbrock head gasket sets on page 48 · use head bolt kits on pg 166 for easy installation .300 raised exhaust ports for maximum power angled plugs for maximum performance pro-port raw heads also available for this engine see pages 163-165 ls1/ls2/ls6 chevy street legal and street high-performance edelbrock/lingenfelter ls1 pro-port cnc head #61969 edelbrock/lingenfelter ls1 pro-port cnc · cnc-ported by lingenfelter performance engineering benefiting from years of experience in gen iii performance modifications · designed for 1997 and later gm ls1 and other gen iii engines including 4.8l 5.3l and 6.0l v8s · intake ports flow 300 cfm exhaust ports flow 217 cfm .600 lift · 65cc combustion chamber retains the stock compression ratio for bolt-on convenience · available bare or fully assembled and ready to bolt-on with high-quality stainless steel 2.02 intake and 1.57 exhaust valves · unmachined pro-port raw version for head porters also available see pages 163-165 completely cnc-ported exhaust ports by lingenfelter performance engineering exhaust ports in stock location edelbrock/lingenfelter pro-port cnc heads for gen iii engines chamber size intake port size valve sizes in/ex bare single complete single 65cc 203cc 2.02 1.57 61979 61969 reinforced rocker bosses for added strength titanium retainers completely cnc-ported intake ports by lingenfelter performance engineering extra thick port walls to allow for additional porting high-quality stainless steel valves dual quench chamber for more efficient combustion edelbrock/lingenfelter ls1 pro-port cnc head #61969 important notes · bare heads will have valve guides and seats installed but will require final sizing and a valve job to match the valves you will be using · recommended spark plugs for most street applications are champion rc12yc except ls series heads not legal for sale or use on pollution controlled motor vehicles 146

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