51259 - SBF RPM XT Aluminum Cylinder Heads.qxp
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1. etc Exhaust Headers Any header or manifold designed for original equipment heads will fit the Edelbrock RPM XT Cylinder Heads Exhaust ports are CNC profiled to match Edelbrock 7227 or Fel Pro 1415 exhaust gaskets which are recommended for this application For maximum performance the opening of exhaust header flange should match an Edelbrock 7227 or Fel Pro 1415 gasket Spark Plugs Use 14mm x 3 4 reach gasketed spark plugs Heat range will vary by application from Champion RC9YC to Champion RC14YC The RC12YC is the plug used in the RPM applications or equivalent Use anti seize on the plug threads to prevent galling in the cylinder head and torque to manufacturer s specification for aluminum heads 2010 Edelbrock LLC Brochure 63 51259 Part 51259 Page 1 of 4 Rev 10 10 AJ mc Head Gaskets Head gasket requirements change according to the application for which the cylinder heads are being used Use the following as a guide for head gasket selection NOTE When using Fel Pro Print O Seal or any silicone beaded gasket you must apply a small strip of silicone to both the deck flange of the cylinder head as shown to the right and the same location on the surface of the block to prevent coolant from contaminating the engine oil 1 NOTE Engines with low or stock compression ratios 8 10 1 stock size head bolts 7 16 and applications where the cylinder head is being used as a stock replacement or a performance upgrade2. 16 18 ft Ibs 7 16 45 ft lbs 58 60cc 185cc 60cc 5 8 Hardened interlocking ductile iron compatible with unleaded fuels Intake 2 02 Exhaust 1 60 8mm x 7 Valve Spring Retainers Valve Spring Diameter Valve Spring Installed Height Valve Spring Seat Pressure Max Valve Lift Pushrod Guideplates Rocker Arms Pushrods Spark Plugs Recommended Intake Gasket Recommended Exhaust Gasket 7 4140 steel 600 5 16 Hardened steel Will accept stock except rail style or aftermarket roller type Will require 5 16 hardened pushrods for use with guideplates 14mm x 34 reach gasketed seat Fel Pro 1250 Fel Pro 1415 2010 Edelbrock LLC Part 51259 Figure 1 Head Bolt Tightening Sequence Figure 2 Steam Hole Locations for Early 289 amp 302 Engine Blocks 1 8 Holes Drilled into the Water Jacket Position Hole Location Using the Head Gasket These diagrams depict the deck surface of the block DO NOT drill into the deck surface of the cylinder heads Page 3 of 4 Front Cylinder RH Bank Brochure 63 51259 Rev 10 10 AJ mc RECOMMENDED PUSHROD LENGTHS IMPORTANT NOTE The lengths supplied in the table below are for use with Edelbrock and Scorpion brand roller rocker arms with a ratio of 1 6 1 Crane roller rocker arms will require pushrods that are 100 longer than the dimensions supplied below other brands may have different variances Use of an adjustable
3. manifold bolts and lubricate the bolt threads prior to assembly If pushrod to cylinder head contact is a problem loosen rocker studs and re position guideplate as needed for clearance Installation is the same as for original equipment cylinder heads Consult service manual for specific procedures if necessary Head gasket recommendations are listed in the head gasket section Be sure that the surface of the block and the surface of the head are thoroughly cleaned to remove any oily film before installation Use alcohol or lacquer thinner on a lint free rag to clean Apply moly oil mixture to head bolt threads washer and area under head bolt to prevent galling and improper torque readings Torque to 70 ft lbs for 7 16 bolts 289 302 or 100 ft lbs for 2 bolts 351 W in three or four steps following the factory tightening sequence see Figure 1 then tighten the long upper head bolts to 80 ft lbs 7 16 or 110 ft Ibs 1 2 A re torque is recommended after initial start up and cool down allow 2 3 hours for adequate cooling 2010 Edelbrock LLC Brochure 63 51259 Part 51259 Page 2 of 4 Rev 10 10 Ad mc SPECIFICATIONS Head Bolt Torque Intake Bolt Torque Rocker Studs Rocker Stud Torque Combustion Chamber Volume Intake Port Volume Exhaust Port Volume Deck Thickness Valve Seats Valve Size Valve Locks 7 16 bolts 70 80 ft Ibs short long bolts 1 2 bolts 100 110 ft Ibs short long bolts
4. pushrod to determine the specific length required by your application is recommended Be sure to verify your valvetrain geometry by turning the crankshaft through 720 degrees of rotation while checking that all rollers maintain sufficient contact with the valve tips The dimensions supplied below are a recommended starting point ONLY be sure to verify proper operation and sufficient valve clearance before starting the engine Edelbrock Camshaft Recommended Intake Recommended Exhaust Part Number Mitake Base Grete Exhaust Base Clete Pushrod Length Pushrod Length 2221 1 315 1 315 6 350 6 450 7122 1 385 1 360 6 900 7 000 2281 1 287 1 302 7 650 7 750 7182 1 390 1 360 8 250 8 350 Edelbrock LLC 2700 California St Torrance CA 90503 Tech Line 800 416 8628 Office 310 781 2222 2010 Edelbrock LLC Brochure 63 51259 Part 51259 Rev 10 10 AJ mc
5. Performer RPM XT Aluminum Cylinder Heads For Small Block Ford V8s Part 51259 INSTALLATION INSTRUCTIONS Please study these instructions carefully before installing your new cylinder heads If you have any questions please call our Technical Hotline at 1 800 416 8628 7 00 am 5 00 pm Monday through Friday Pacific Standard Time IMPORTANT NOTE Proper installation is the responsibility of the installer Improper installation will void warranty and may result in poor performance and engine or vehicle damage DESCRIPTION Edelbrock Performer RPM XT Cylinder Heads are designed for street strip high performance use These cylinder heads do not have an internal exhaust crossover and may not be legal on vehicles required to meet an emissions standard These heads have been partially CNC machined to produce exceptional power levels at a reasonable price The performance range is 1500 6500 rpm for great throttle response as well as top end horsepower The combustion chamber and the intake and exhaust bowls are fully CNC machined for maximum performance while the intake entries and exhaust exits are CNC machine matched for maximum flow velocity when mated to an engine equipped with the Performer RPM intake manifold cam kit and a Performer Series Carburetor This power package produced 500 horsepower in dyno tests on 351 W engines These heads are designed to use 1 2 head bolts On 289 302 engines with 7 16 head bolts you must use Edelbrock
6. as ARP 200 8533 NOTE It is recommended that 289 302 engines producing 380 or more horsepower or with nitrous oxide be converted to accept 2 diameter head bolts by a qualified machine shop to ensure maximum head gasket durability Rocker Arms The valve springs supplied will accommodate valve lifts up to 600 which is much higher than stock rocker arms will allow Roller rocker arms will be required if your camshaft has more than 480 lift Since the 18 valve angle will change valvetrain geometry from stock it is highly recommended that you use a mechanical lifter and an adjustable pushrod to determine the appropriate pushrod length See the table at the end of the instructions for the pushrod lengths recommended for use with Edelbrock camshafts Valve Covers Because most roller rockers are physically larger than stock rockers taller valve covers are usually required to clear them Edelbrock Signature Series chrome valve covers 4260 and cast aluminum Classic valve covers 4160 both work well on this head Intake Manifold Although stock intake manifolds will fit the Edelorock RPM XT Cylinder Heads are matched in size and operating range with Edelbrock Performer RPM intake manifolds If the Performer RPM is too tall to fit under your hood you may use the Edelbrock Torker II manifold 5021 or 5081 Additionally any manifold that matches Edelbrock gasket 7220 or Fel Pro gasket 1250 may be used Edelbrock Performer Torker Il Victor Jr
7. head bolt bushings with integral washers 9680 and Edelbrock head bolt kit 8552 or stock 7 16 head bolts COMPONENTS These heads are equipped with high quality beehive valve springs and lightweight valves to optimize performance Complete cylinder heads are assembled with the following components Stainless steel one piece 8mm stem swirl polished intake and exhaust valves with under cut stems for increased flow LS1 style valve seals 3 8 rocker studs and 5 16 guideplates Edelbrock Sure Seat Beehive Conical Valve Springs hardened valve spring seats steel retainers and valve keepers ACCESSORIES Although Edelbrock RPM XT Cylinder Heads will accept some OEM components stud mounted rocker arms valve covers intake manifold head bolts 351 W only etc we highly recommend that premium quality hardware be used with your new heads See our catalog for details To order a catalog call 800 FUN TEAM Head Bolts or Studs High quality head bolts or head studs with hardened washers must be used to prevent galling of the aluminum bolt bosses Recommended head bolts are ARP 254 3708 for engines with 7 16 head bolt holes 289 and 302 You may use Edelbrock Head Bolt Kit 8552 or stock 7 16 bolts on 289 302 engines only if you purchase Edelbrock head bolt bushings with integral washers 9680 Engines with 1 2 diameter head bolts 351 W and 302 SVO use Edelbrock Head Bolt Kit 8553 or stock 351 W bolts with high quality head bolt washers such
8. will have the water passages located directly over the cylinder upper deck area and will require drilling 1 8 steam holes in the block as seen in Figure 2 Piston to Valve Clearance Minimum intake valve clearance should be 080 Minimum exhaust valve clearance should be 110 The point of minimum intake valve to piston clearance will usually occur somewhere between 5 and 20 ATDC during valve overlap The point of minimum exhaust valve to piston clearance will usually occur 20 to 5 BTDC during valve overlap Due to the 18 valve angle re machining of the piston top eyebrows may be required with some pistons Proper Hydraulic Lifter Pre Load and Rocker Geometry Rocker geometry should be checked making sure that the contact point of the roller or pad on a stock rocker remains properly on the valve tip and does not roll off the edge Visual inspection of the rockers valve springs retainers and pushrods should be made to ensure that none of these components come into improper contact with each other If problems with valve train geometry occur simple changes such as pushrod length may have to be made Refer to the table at the end of the instructions for recommended pushrod lengths OTHER ASSEMBLY TIPS When installing the sparkplugs and exhaust manifolds be sure to use a high temperature anti seize compound on the threads to reduce the possibility of thread damage in the future Do not exceed a torque of 16 18 ft Ibs on the intake
9. with the stock piston volume without nitrous or forced induction blowers or turbos use Edelbrock head gasket 7313 or Fel Pro Head Gasket 9333 PT1 Medium performance engines 10 12 1 compression ratio increased pre load cylinder head fasteners 7 16 stud or 12 head bolts or studs not recommended with nitrous or forced induction Edelbrock head gasket 7313 or Fel Pro Head Gasket 1011 2 Highest performance racing engines 12 1 and above compression ratio cylinder head fasteners designed for the highest pre load engines using nitrous or forced induction Fel Pro Head Gasket 1006 Locwire NOTE This gasket will require a groove to be cut in the deck surface of the cylinder head by a competent machine shop to Fel Pro specifications See OTHER ASSEMBLY TIPS below For applications 1 amp 2 above Edelbrock Cylinder Head Gasket Set 7364 may also be used This gasket set includes all gaskets necessary for installation of Edelbrock cylinder heads including cylinder head intake manifold exhaust and valve cover gaskets INSTALLATION Before final installation of the cylinder heads several things need to be checked to assure proper engine operation 1 Check the upper deck to see if you have an early or late model block not needed with 351 W a Late model 289 302 blocks have the water passages located next to the head bolt location on the deck of the block This block will not require drilling b Early 289 302 blocks
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