Designed for 1992 and later 5.2L (318 c.i.d.) and 1993 and later 5.9L (360 c.i.d.) Chrysler Magnum V8s, the Performer RPM Chrysler Magnum cylinder heads provide substantial performance improvements for street/strip and off-highway performance use. They offer an easy bolt-on upgrade for these modern engines. Stock Magnum intake and exhaust flange and port locations ensure fit with all Magnum-based aftermarket equipment including our all new RPM Air-Gap Magnum carbureted intake manifold #7577. These heads feature 176cc intake ports and 75cc exhaust ports with 58cc combustion chambers for a slight increase in compression over the factory heads. 2.02” intake and 1.60” exhaust valves with 11/32” valve stems offer more flow than stock and they accept adjustable aftermarket rocker arms (hardened pushrods required).
Rocker Arms & Valve Train: Adjustable rocker arms must be used. These heads are assembled with 3/8” rocker studs and will not accept factory pedestal mount rocker arms. A high performance, stud mounted roller rocker arm is recommended for use with these heads, such as Crane Cams #11759-16, or Comp Cams #1302-16. These rocker arms are listed as 1.6:1 ratio for use on Small Block Chevy V8s with 3/8” rocker studs. Valve cover modification may be required with the use of roller rockers (See Valve Covers section below).
Valve Covers: Edelbrock Performer RPM heads accept stock valve covers for the year and model for which they are listed. When using roller rockers with these heads, the stock valve covers may need to be spaced up about 3/8” with extra thick valve cover gaskets, or by laminating multiple gaskets together using silicone sealer or gasket adhesive. Aftermarket valve covers are recommended, such as Mopar Performance #P5249343 (Black Wrinkle Finish) or P4876041 (Polished Finish) cast aluminum valve covers.
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Monday, May 24, 2010
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