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• PLEASE study these instructions, and the General Instructions, carefully before installing your new manifold. If you have any
questions or problems, do not hesitate to call our Technical Hotline at: 1-800-416-8628.
• EGR SYSTEM: This manifold will not accept stock EGR (exhaust gas recirculation) equipment . EGR systems are used on some
1972 and later model vehicles and only in some states. Check local laws for requirements. Not legal in California on pollution-
controlled motor vehicles.
• MANIFOLD: The Edelbrock RPM Air-Gap manifold has been designed for 262-400 c.i.d. small-block Chevrolet engines. The
manifold accepts late model water neck, air conditioning, alternator and H.E.I. ignition systems. Use the recommended electric or
manual type choke carburetors only. This manifold is recommended for street high performance and race vehicles only. The RPM
Air-Gap manifold provides good low rpm response for street performance vehicles and increases performance above the 5000 rpm
range. It also provides horsepower and torque increases, when used with any mix of aftermarket equipment available for vehicles oper-
ating from 1500-6500 RPM.
• ACCESSORIES & INSTALLATION ITEMS: Major recommendations are listed below. However, due to the variety of years, makes
and models to be covered, please review each part listed in the Installation Items section of the Edelbrock catalog to decide whether
more items are required for your specific vehicle than are mentioned in these instructions.
• POWER PACKAGE: Edelbrock RPM Air-Gap manifolds are part of a total Power Package System that can be completed with the
use of Edelbrock Performer RPM aluminum cylinder heads, dyno-matched Performer RPM camshaft #7102, springs, chain set,
carburetors and related parts specifically designed to give you maximum results. Please refer to our catalog for details.
• CARBURETOR RECOMMENDATIONS: If parts required for installation are unavailable locally, contact Edelbrock directly.
CARBURETOR
Performer #1407 (750 cfm)
A-Carburetor will work with non-EGR (Exhaust Gas Recirculation) or pre-emission control system.
I-Carburetor has no provision for evaporative canister.
K-Carburetor requires #8008 or #8024 stud, nut and washer kit. Determine length needed before installation.
O-Carburetor has manual choke only.
If electric choke is required use Edelbrock kit #1478.
Note: Manifold has been tested and proved compatible with Holley 0-4779 (750 cfm).
• BRACKETS
1. Due to the design and leg configuration on the Edelbrock manifold, the throttle and kick-down bracket on some model vehicles
requires modification to fit. If this condition occurs with your installation, you may purchase the Edelbrock mounting bracket #8036,
or modify your bracket as shown in Figure 3.
2. The carburetor location has been moved up by 0.7" and forward by 0.125" from the OEM location for maximum performance. If your
throttle cable bracket fastens to the carburetor pad you won't have a problem. If your bracket fastens to the back of the manifold use
kit #8012. (To install #8012 properly, depress the throttle pedal fully, open the carburetor to WOT, and then install the #8012 extension
to the carburetor). Failure to do this will prevent your throttle pedal from tripping the transmission sensor at WOT. This affects
transmission kick-down and up-shift points resulting in reduced performance.
• GASKETS AND SEALANT
CAUTION: Do not use high performance or competition type intake gaskets for street application. Due to material deterioration under
street driving conditions, internal leakage of both vacuum and oil may occur.
1. Use only Edelbrock #7201, Fel-Pro #1205, or OE equivalent gasket set when installing Edelbrock manifolds for street applications.
2. Apply Edelbrock Gasgacinch sealant, #9300, to both sides of the manifold as well as head surfaces. This procedure ensures a good
seal.
© 1998 Edelbrock Corp.
MODEL: Chevrolet 262-400 c.i.d.V8, 1957 to 1986 Non-EGR
REFERENCE
PARTS REQUIRED FOR INSTALLATION
A, I, K, O
#8036 Throttle Cable Bracket (1972-79 only) or #8012 Throttle Cable Extension Kit
RPM AIR-GAP MANIFOLD
CATALOG #7501
INSTRUCTIONS
12/98
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Summary of Contents for Edelbrock 262-400
- Page 1 • ACCESSORIES & INSTALLATION ITEMS: Major recommendations are listed below. However, due to the variety of years, makes and models to be covered, please review each part listed in the Installation Items section of the Edelbrock catalog to decide whether more items are required for your specific vehicle than are mentioned in these instructions.
- Page 2 4. The compression ratio should be at least 9.5 to 1 to work properly with the #7102 camshaft. 5. Installation of aftermarket headers, camshafts or both with an Edelbrock RPM Air-Gap manifold may lean carburetor calibration. Should this condition occur, recalibrate with a richer jet.
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Page 3: Preliminary Checklist
Edelbrock, and we will determine the method of satisfying the warranty. Should Edelbrock determine that the product be returned to the factory, it should be accompanied by proof of purchase and a clear notation of the exact problem encountered. - Page 4 Paper and pencil Radiator coolant Vacuum gauge Teflon thread tape or PST thread sealer or equivalent Check manifold instruction sheet for catalog numbers of Edelbrock or OEM parts needed for your installation. CHECKING HOOD CLEARANCE: NOTE: Check hood clearance BEFORE removing stock manifold.
- Page 5 This procedure will provide guidelines for keeping vehicle emission levels within legal limits. 3. Edelbrock cannot be responsible for vehicle emissions if all such devices are not re-connected. NOTE: If any emission part cannot be re-installed with your Edelbrock manifold, contact: Edelbrock Corporation.
- Page 6 WARNING: On most Chrysler and Ford engines, there are dowel pins in the front and rear valley seal surfaces. These dowel pins MUST be removed. Edelbrock manifolds are not drilled for dowel pins and will not seal if they are not removed. Damage may result.
- Page 7 See Figure 8. Figure 8 5.. With Edelbrock manifolds, you must use RTV High Temp silicone sealer instead of end seal gaskets. Apply a 1/4" thick ribbon of sealant across each end seal surface. Some installation require 02 sensor safe silicone See Figure 9.
- Page 8 3. Choke must be set with engine cold. 4. Be sure carburetor and thermostat are securely bolted in place. 5. Insert plain end of Edelbrock choke rod in rolled eye of spring and clip end in carburetor linkage. See Figure 12.
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Page 9: Troubleshooting
4. Incorrect manifold gaskets or carburetor gaskets. Do not use Fel- Pro Permatorque gaskets for any aluminum intake manifold. Use the correct Edelbrock, OEM replacement, or Fel-Pro Printoseal gaskets. 5. Failure to use Edelbrock carburetor spacer plates when recommended. 6. Failure to re-torque manifold. © 2001 Edelbrock Corporation Brochure No. - Page 10 Unnecessary demands on the added performance will affect mileage. To simplify the selection of all parts necessary for a complete intake manifold selection, Edelbrock has developed a system which includes packaged accessory pieces intended to allow “one stop” shopping for manifold installations. Under each listed manifold there is a coding. These letters refer to the “symbol nomenclature”...