Edelbrock 1671, 1670 user manual

PERFORMER 3-PIECE, SINGLE CARB INTAKE MANIFOLDS

for 1984 & Later Harley-Davidson® Evolution®

“Big Twin”, and 1999 & Later Twin Cam 88 Engines

INSTALLATION INSTRUCTIONS

PLEASE study these instructions carefully before beginning this installation. Most installations can be accomplished with common tools and

procedures. However, you should be familiar with and comfortable working on your vehicle. If you do not feel comfortable performing this installation, it is recommended to have the installation completed by a qualified mechanic. If you have any questions, please call our Technical

Hotline at: 1-800-416-8628, 7:00 am - 5:00 pm, Pacific Standard Time, Monday through Friday or e-mail us at edelbrock@edelbrock.com. If your question is motorcycle carburetor-related, please call our Edelbrock Motorcycle Carburetor division at 1-877-888-7504, Ext. 2.

IMPORTANT NOTE: Proper installation is the responsibility of the installer.

Improper installation may result in poor performance and engine or vehicle damage.

PLEASE complete and mail your warranty card. Be sure to write the model number of this product in the "Part #____" space. THANK YOU. DESCRIPTION: The Edelbrock Performer 3-piece intake manifolds are designed for street high performance use with Edelbrock Performer or

Performer RPM heads only. Some manifolds are for grommet-mount carburetors, and others fit flange-mount carbs (see chart on next page). These intake manifolds are designed to make excellent power increases in the stock rpm range of the Harley-Davidson®Big Twin®engine (idle to 6000 rpm). These manifolds and heads feature a rectangular shaped intake port for a noticeable increase in air flow. This .125" raised rectangular intake port also helps to increase the velocity of the incoming air for more power. These intake manifolds can only be used on Edelbrock heads because of the unique port shape. Performer manifolds fit 1984 and later Evolution®"Big Twin" motors with Edelbrock Performer or Performer RPM heads, and 1999 and later Twin Cam 88 motors with Edelbrock Performer RPM heads.

When used with Performer cylinder heads, Performer intake manifolds are street legal in all 50 states. (C.A.R.B. E.O. Call Edelbrock for detailed information).

INSTALLATION PROCEDURE

MANIFOLD INSTALLATION

NOTE: Manifold installation will usually be performed along with installation of Edelbrock cylinder heads. Refer to cylinder head instructions for step-by-step procedures, if necessary. These instructions cover only the procedures that apply to Edelbrock 3piece intake manifolds.

1. Inspect manifold for any nicks or other damage on the sealing surfaces.

2. On Twin Cam 88 motors, transfer the MAP sensor from the stock manifold, lubricate the seal with lightweight oil and secure with the 8-32X1/4 socket head cap screw provided in kit

3. Note that flanges are marked front and rear. Place flanges on manifold with the 30° tapered side facing out (toward the head) and the slotted bolt holes to the rear of the manifold.

4. Lubricate grommets with a lightweight oil such as fork oil or brake assembly lube (not brake fluid) Note that the grommets are rectangular, and will only fit on manifold one way. Push grommets onto manifold as far as they will go.

5. Place manifold in position on cylinder heads, being careful not to pinch or fold-over grommet.

6. Start all four manifold bolts and washers by hand, then tighten each bolt gradually, moving from bolt-to-bolt in small steps. There is no room for a torque wrench, but final torque should be very firm (18-23 ft./lbs.). If desired, you may use a nonpermanent locking compound, such as green Locktite®, on bolt threads.

NOTE: You must use the AN washers supplied on the manifold bolts to prevent over-stressing and cracking the flanges.

CARBURETOR MOUNTING

Because the 3-piece manifold “floats” between the two cylinder heads, it is very important that the carburetor is properly supported to prevent manifold droop and resultant leakage at the grommets. Be sure that the air cleaner backing plate is secured or that the necessary air cleaner support brackets are used.

REPLACEMENT PARTS

Replacement grommets and flanges are available through your local motorcycle shop.

Evolution and Harley are registered trademarks of Harley-Davidson, Inc., Milwaukee, Wisconsin, USA and are used in this brochure for reference only. Edelbrock is a registered trademark of Edelbrock Corporation, Torrance, California.

3-Pc Single Carburetor Intake Manifolds for H-D Rev. 12/05 - RS/mc

Brochure #63-0180Page 1 of 2

#1670

#1671

Performer 3-piece Manifolds

EDELBROCK INTAKE MANIFOLDS FOR “EVOLUTION” BIG TWIN APPLICATIONS

3-Pc. 3-Pc. 3-Pc. 3-Pc. 3-Pc.

Width Flange Intake* Spigot Intake*◆ S&S "G"/48mm Mikuni S&S "D" 45mm Mikuni/44mm CV Stock 1671 1670 1669 1760 1750

Narrow (-.050”) 1676 1677 1683 1761 1751 More Narrow (-.100”) 3042 1659 3034 1762 1757 Extra Narrow (-.175”) 3031 3030 3032 1767 1752 Ultra Narrow (-.240”) 3033 3043 3044 1763 1756 Wide (+.075”) 1674 1675 1684 1765 1753 Extra Wide (+.200”) 1682 9289 1685 1766 1755 Ultra Wide (+.265”) - - 1786 1759 1758

EDELBROCK INTAKE MANIFOLDS FOR TWIN CAM APPLICATIONS

3-Pc. 3-Pc. 3-Pc. 3-Pc. 3-Pc. 3 Pc.

Width Flange Intake* Spigot Intake S&S "G"/48mm Mikuni S&S "D" 45mm Mikuni/44mm CV 48mm Mikuni Stock 3120 3121 3122 3128 3123 3129

Wide (+.075”) 1780 1781 1782 1783 1784 1785

NOTE: 100-inch motor may require custom fitting to your combo. Specifications are based off Edelbrock's cylinder head milling dimensions. For custom applications, please ask your local engine builder. *Will also fit SS Super "E" carburetor. *◆Will also fit Mikuni 40/42mm carburetor

Edelbrock Corporation • 2700 California Street • Torrance, CA 90503

Tech Line: 1-800-416-8628

E-Mail: edelbrock@edelbrock.com

3-Pc Single Carburetor Intake Manifolds for H-D Rev. 12/05 - RS/mc

Brochure #63-0180Page 2 of 2