Edelbrock 330/350/403 - Manual (Page 2)

• MANIFOLD TORQUE
Install the 3/8"-16 x 2" header bolts and 3/8" AN washers supplied in positions #6 and #7 of Figure 1. Torque all manifold bolts cir-
cled in Figure 1 to 25 ft/lbs. See Figure 1 for proper sequence.
• FIRING ORDER AND CYLINDER NUMBERING
For cylinder numbering and firing order, see Figure 2.
• FINAL TUNING FOR OPTIMUM PERFORMANCE
1. Due to design, the fuel / air mixture and cylinder charging are very efficient with the Performer RPM manifold. Generally speaking,
the stock jetting for the Performer Series carburetor will not need changing.
2. Aftermarket distributor curve kits may be used with Performer RPM manifolds.
3. Use modified or high performance cylinder heads, and port-match the manifold to the heads. 455 heads may be used, if desired.
4. The compression ratio should be at least 9.5 to 1.
5. Installation of aftermarket headers, camshafts or both with an Edelbrock Performer RPM manifold may lean carburetor calibration.
Should this condition occur, re-calibrate with a richer jet.
• CAMSHAFT AND HEADERS
The Performer RPM manifold is compatible with aftermarket camshafts and/or headers. Edelbrock has developed a dyno-matched,
street proven camshaft #7112, which is optimized for use with the Performer RPM #7111. This camshaft will require the use of high
performance rocker arms, studs, retainers, and valve springs. Header primary tube diameter should be 1-3/4".
• MODIFICATION FOR RACE ONLY
For boat and competition applications: Any implied or expressed warranty is void unless the special exhaust crossover plugs are used
with your engine. These cast iron plugs are furnished with each Performer RPM 330-403 manifold and must be installed in the
exhaust crossover port in each head. Use a file to fit and finish the plugs until they are a light drive fit, and with a small hammer, tap
them into each head until they are flush or a vacuum leak may occur. Extra plugs may be purchased from your local Edelbrock dealer
under Edelbrock #2733.
• PARTS SUPPLIED WITH MANIFOLD
2—1/2" Pipe Plugs
1—3/8" Pipe Plug 3—1/4" Pipe Plugs
2—3/8" AN Washers 2—3/8"-16 x 2" Header Bolts 2—Olds Iron Exhaust Crossover Plugs
• PLEASE complete and mail your warranty card. Be sure to write the model number of this product in the “Part #____” space.
THANK YOU
page 2
Figure 2
Oldsmobile 330-403 c.i.d. V8
Firing Order 1-8-4-3-6-5-7-2
Rotate Distributor Clockwise to
Advance Timing
Figure 1
Torque Sequence