Page 5 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 small-block chevy e-tec s/b chevy street legal street high-performance performer centerbolt for corvette · designed for 1987-91 5.7l corvettes except lt1 lt4 lt5 vettes originally equipped with centerbolt valve covers and the early style straight manifold bolt pattern · also fits 1986 corvette convertibles originally equipped with aluminum heads · accepts edelbrock elite series aluminum valve covers #4246 4247 stock centerbolt or new victor series valve covers #41733 performer centerbolt for corvette head #60879 street legal performer for 5.7l vettes chamber size intake port size valve sizes in/ex bare single complete single 60cc 165cc 2.02 1.60 60869 60879 e-tec 200 head #60989 has 200cc intake ports for high rpm or large displacement small-blocks e-tec 170 head #60979 e-tec heads have .200 raised exhaust port exits for improved flow and more power e-tec 200 head #60989 features 64cc chambers and stainless steel 2.02 1.60 valves edelbrock e-tec · for 302 327 350 400 c.i.d s/b chevys with vortec-style manifolds · high-quench chamber promotes uniform atomization of the a/f mixture for more power · intake ports are .200 taller than standard small-block chevy heads · spark plugs positioned closer to the center of the cylinder for more efficient combustion · accepts centerbolt or standard valve covers and most stock exhaust manifolds · exhaust port exits are .200 higher than standard heads · match with an edelbrock vortec manifold for maximum performance danger mouse delivers 485 hp with e-tec heads the danger mouse project was featured in the december 04 issue of super chevy magazine the 355-inch chevy cranked out an impressive 485 hp and 458 ft/lbs with edelbrock e-tec 170 heads rpm air-gap manifold and performer rpm roller cam they wrote the results were way better than we expected especially in the hp department the e-tec 170s with their smaller runner volumes increased torque by over 40 ft/lbs at 4,000 rpm but power also increased by as much as 34 hp at 4,400 rpm peak power never dropped off either in fact this combo actually made peak horsepower at a lower rpm we think this combination of torque hp and the driveability it would produce is the best combo we ve ever tested 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 · to use stock rockers on small-block chevy heads .100 longer than stock pushrods are required edelbrock pushrods #9629 recommended · use head bolt kits on pg 166 for easy installation · s/b chevy heads may not be used on engines with less than 4 bore 262 265 283 305 307 c.i.d except with cams having less than .450 valve lift e-tec 170 · 20 more exhaust flow than cast iron vortec heads great performance up to 6000 rpm · 64cc chambers produce 9.5:1 compression with stock pistons in 350-inch engines street legal e-tec 170 chamber size intake port size valve sizes in/ex bare single complete single 64cc 170cc 1.94 1.55 60959 60979 e-tec 200 · outflows other aluminum heads of a similar design by 10 on the intake and 17 on the exhaust making power up to 6500 rpm · 64cc chambers produce 10.2:1 compression with flat-top pistons in 350-inch engines e-tec 200 chamber size intake port size valve sizes in/ex bare single complete single 64cc 200cc 2.02 1.60 60969 60989 note see chart on pages 168-169 for specs match with edelbrock head gasket sets on page 48 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 not legal for sale or use on pollution controlled motor vehicles 144

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