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Small Block Chevy Performer RPM with straight plugs (70cc combustion chamber)-Complete AssemblyPerformer RPM Small-Block Chevy Designed for 302, 327, 350 and 400 cid small-block Chevy engines up to 1986, these Performer RPM cylinder heads are available fully assembled and ready to bolt on or bare for use with your own valve train components. Features include high-quality stainless steel 2.02" inta ...more
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Small Block Chevy Performer RPM with straight plugs (70cc combustion chamber)-Complete AssemblyPerformer RPM Small-Block Chevy
Designed for 302, 327, 350 and 400 cid small-block Chevy engines up to
1986, these Performer RPM cylinder heads are available fully assembled
and ready to bolt on or bare for use with your own valve train
components. Features include high-quality stainless steel 2.02" inta
ke
and 1.60" exhaust valves, choice of 64cc or 70cc combustion chambers
and high flow 185cc intake and 65cc exhaust ports. Intake and exhaust
runners are hand blended in the bowl area and the intake entries and
exhaust exits are cnc profiled for increased air-flow. These heads
include adjustable rocker stud and guide plate set-up for use with
adjustable rockers. The casting is manufactured of A356 aluminum and
heat treated to T6 spec for superior quality. An extra-thick 58" deck
and Heli-coil threaded inserts offer improved durability. Performer RPM
cylinder heads are available with straight or angled spark plug
configuration to fit a variety of exhaust applications. Made in USA.
Performer RPM Small-Block Chevy Cylinder Head Specifications
Combustion chamber volume
64cc amp; 70cc
Intake runner volume
185cc
Exhaust runner volume
65cc
Intake valve diameter
2.02"
Exhaust valve diameter
1.60"
Valve stem diameter
1132"
Valve guides
Manganese bronze
Deck thickness
58"
Valve spring diameter
1.46"
Valve spring maximum lift
0.575"
Rocker stud
38"
Guideplate
Hardened steel
Pushrod diameter
516"
Valve angle
23 degrees
Exhaust port location
Stock
Spark plug fitment
14mm x 34 reach, gasket seat
Made In
USA
Technical Notes: Sold individually. Requires the use of hardened push
rods. Bare heads will have valve guides and seats installed, but will
require final sizing and valve job to match the valves you will be
using. To use stock stamped steel rockers on small-block Chevy heads,
.100" longer than stock Edelbrock pushrods 9629 or equivalent are
required. Small-block Chevy heads may not be used on engines with less
than a 4.00" bore except with camshafts with less than .450" valve lift.
Flow Numbers as tested by Edelbrock's SuperFlo SF-1020 flow bench 28" H2O
60719 | 60739 | 60759
Valve Lift
.100"
.200"
.300"
.400"
.500"
.600"
.700"
Intake
73
140
200
238
244
244
-
Exhaust
61
108
144
163
175
183
-
Bolt-on power right out of the box.
These Edelbrock Performer RPM aluminum cylinder heads feature threaded inserts in the rocker studs and exhaust manifold bolt holes for superior strength and durability plus hardened seats bronze valve guides and fully machined valve cover rails for a more consistent gasket seal. They offer improved power throughout the rpm range for greater throttle response and top-end horsepower. The intake and exhaust runners are CNC-machine profiled for superior flow and performance.
Designed for non-emissions 302-400 c.i.d. engines up to 1986 this head made 420 horsepower with the Performer RPM Power Package for small block Chevys. It has straight plugs to clear most types of exhaust headers and the 70cc chamber can be used to raise compression on later engines with 76cc heads without changing pistons. Its 170cc intake runners and 60cc exhaust runners improve flow dramatically over stock heads for an excellent street combination.
Heads must be drilled for steam holes when used on 400 engines.
Must have at least a 4 in. bore.
Use FelPro Gskts; PN[1014] for Head; PN[1205] for Intk; PN[1404] for Exhst
Use FelPro Gskt; PN[1003] for Head; PN[1256] for Intk; PN[1404] for Exhst
When Using Stock Rockers Must Use .100 in. Longer Than Stock Pushrods
Sold As Single Head- Order Quanity Of Two [2]
Except With Cams Having Less Than .450 in. Valve Lift
May Not Be Used On Engines With Less Than 4 in. Bore
Must Use Hardened Pushrods
Not Legal For Sale Or Use On Pollution Controlled Motor Vehicles
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