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GM 7.4 Light Truck
Supercharger System
Installation Instructions
1988-1995 Model Years
50 State Smog Legal per CARB EO #D-213-17
®
ENGINEERING, LLC
1650 PACIFIC AVENUE • CHANNEL ISLANDS, CA 93033-9901 • (805) 247-0226
FAX (805) 247-0669 • www.vortechsuperchargers.com • M-F 8:00 AM - 4:30 PM PST
P/N: 4GC020-010
©2001 Vortech Engineering, LLC
All Rights Reserved, Intl. Copr. Secured
15SEP01 V1.1 (88-95 GM Lt Trk(4GC))
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FOREWORD Proper installation of this supercharger kit requires general automotive mechanic knowledge and experience. Please browse through each step of this instruction manual prior to beginning the installation to determine if you should refer the job to a professional installer/technician. Please call Vortech Engineering for installers in your area. © 2001 VORTECH ENGINEERING, LLC All rights reserved. No part of this publication may be reproduced, transmitted, transcribed, or translated into a
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Table Of Contents FOREWORD ...................................................................................................................... ii TABLE OF CONTENTS ..................................................................................................... iii NOTICE .............................................................................................................................. iv TOOL & SUPPLY REQUIREMENTS................................................................
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NOTICE This product is protected by state common law, copyright and/or patent. All legal rights therein are reserved. The design, layout, dimensions, geometry, and engineering features shown in this product are the exclusive property of Vortech Engineering, Inc. This product may not be copied or duplicated in whole or part, abstractly or fundamentally, intentionally or fortuitously, nor shall any design, dimension, or other information be incorporated into any product or apparatus without prior
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1988 - 1995 GM 7.4 LIGHT TRUCK Installation Instructions 50 State Smog Legal, as per CARB EO #D-213-17 Congratulations on selecting the best performing and best backed automotive ® ® supercharger available today... the VORTECH V-2 Supercharger! Before beginning this installation, please read through this entire instruction booklet and the Street Supercharger System Owner's Manual which includes the Limited Warranty Program and the Warranty Registration form and return envelope. Vortech superch
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P/N: 4GC020-010 ©2001 Vortech Engineering, LLC All Rights Reserved, Intl. Copr. Secured vi 15SEP01 V1.1 (88-95 GM Lt Trk(4GC))
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1988-1993 7.4 Truck Part No. 4GC218-090SQ ® ENGINEERING, LLC PARTS LIST IMPORTANT: Before beginning installation, verify that all parts are included in the kit. Report any shortages or damaged parts immediately. Part Number Description Quantity Part Number Description Quantity 4GC112-010 AIR INTAKE ASSEMBLY 1 2E228-090 V-2SQ SUPERCHARGER ASSEMBLY 1 4GB012-010 Air Filter Cover 1 4GC012-012 Air Inlet Tube 1 4GC111-021 MOUNTING BRACKET ASSEMBLY 1 4FA012-012 90° Intake Elbow 1 7P375-017 3/8” NPT x 1
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P/N: 4GC020-010 ©2001 Vortech Engineering, LLC All Rights Reserved, Intl. Copr. Secured viii 15SEP01 V1.1 (88-95 GM Lt Trk(4GC))
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1994-1995 7.4 Truck Part No. 4GG218-090SQ ® ENGINEERING, LLC PARTS LIST IMPORTANT: Before beginning installation, verify that all parts are included in the kit. Report any shortages or damaged parts immediately. Part Number Description Quantity Part Number Description Quantity 5A001-004 FUEL INJECTION COMPUTER 1 2E228-090 V-2 SQ SUPERCHARGER ASSEMBLY 1 4FA111-032 BELT TENSIONER ASSEMBLY 1 4GG111-021 MOUNTING BRACKET ASSEMBLY 1 7J012-092 12mm Flat Washers 3 7A437-600 7/16-14 x 6” Bolt 1 4FA011-03
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P/N: 4GC020-010 ©2001 Vortech Engineering, LLC All Rights Reserved, Intl. Copr. Secured x 15SEP01 V1.1 (88-95 GM Lt Trk(4GC))
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1. COMPONENT REMOVAL A. Disconnect the battery (negative lead). B. Remove and set aside the following compo- nents: • The top portion of the fan shroud • The accessory drive belt • The cooling fan assembly • The crankshaft pulley • The air filter canister assembly and hose • The intake air resonator (detach from inner fender) • The power steering pump pulley (1994 models only) NOTE: If the vehicle is a 1993 model year or later, it will be necessary to purchase the stock air inlet resonator. The
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3. OIL DRAIN LINE A. Raise the front of the vehicle and support with appropriate jack stands. B. To provide an oil drain for the supercharger, it is necessary to make a hole in the oil pan. It is best to punch the hole rather than drill. Remove paint around the hole area so that it does not flake into the pan. C. Make a mark on the oil pan on the driver’s side ahead of the oil filter. The mark should be 3" below the bolt flange and rearward of the fourth bolt 7/8". (See Fig. 3-a.) You may choose
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4. OIL FEED LINE A. The supercharger uses engine oil for lubrication and must have an oil feed line connected to a ENGINE BLOCK filtered oil access on the engine and an oil return or drain. (See Fig. 4-a.) Connection to the oil pan must be above the oil level. WARNING: The oil system contains a small orifice that is easily plugged. DO NOT use any type sealant on any feed line threads. Instead, OIL PAN use clean engine oil. Disas- semble and blow out entire line if you have any doubts. B. Disco
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5. SUPPLEMENTARY FUEL INJECTION COMPUTER AND RELATED SYSTEM - Cont'd. NOTE: Make sure all small holes are aligned and not plugged with gasket sealer when in- stalled. D. Mount the additional fuel pump to the inner side of the frame rail beneath the driver's side floor. Use the shorter hose provided to help locate the pump the correct distance from the filter. This hose has an adapter fitting on the filter end. Secure the pump to the frame and hose with the clamp and fastener provided. (See Fi
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5. SUPPLEMENTARY FUEL INJECTION COMPUTER AND RELATED SYSTEM - Cont'd. NOTE: Factory fuel return line must be attached to original fitting on TBI unit. 3/8” HOSE CONNECT TO FITTING ON 3/8” BARB DISCHARGE PLENUM 1/4 NPT FEMALE USE 3/8" ADAPTER FITTING PLACE 3/8" ADAPTER FITTING AT STOCK FUEL FILTER INTO TBI FUEL INLET THROTTLE SPACER BLOCK UPPER FITTING LOWER FITTING 5/16” BARB x 1/4 NPT FEMALE SUPPLEMENTAL INJECTORS INJECTOR CONNECTORS ARE INTERCHANGEABLE AND REVERSIBLE 5/16” VORTECH FUEL PUMP
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5. SUPPLEMENTARY FUEL INJECTION COMPUTER AND RELATED SYSTEM - Cont'd. TEMPLATE THROTTLE BODY DRILL TWO HOLES THROUGH BOTTOM OF THROTTLE BODY UNTIL POSITIVE THROTTLE SHAFT CONTACT USE 3/64" OR #56 (.046) DIAMETER .100 .100 4.550 Fig. 6A-a P/N: 4GC020-010 ©2001 Vortech Engineering, LLC All Rights Reserved, Intl. Copr. Secured 6 15SEP01 V1.1 (88-95 GM Lt Trk(4GC))
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6A. MAIN BRACKET AND POWER STEERING PUMP - 1988-1993 MODELS A. Install the connector bracket to the front of the stock bracket at the power steering pump with the two longer metric fasteners provided. Some vehicles use metric and others use standard SAE threads. Check the threads on the fasten- ers you have just removed against the ones supplied prior to installation. Both metric and standard fasteners have been provided for your convenience. Leave the fasteners slightly loose until all fasten
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6B. MAIN BRACKET AND POWER STEERING PUMP 1994 - 1995 MODELS ONLY A. Disconnect all electrical connections at the al- ternator. B. Remove the alternator from the vehicle and set aside. C. Loosen the main cast iron accessory mounting bracket. D. Remove the power steering pump fasteners and set pump aside temporarily. Remove mount- ing bracket. E. Locate the power steering pump into the sup- plied mounting bracket. Install the two right side bolts finger tight. F. Fasten the new mounting bracket
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6B. MAIN BRACKET AND POWER STEERING PUMP 1994 - 1995 MODELS ONLY, Cont'd. FACTORY ALTERNATOR ALTERNATOR ATTACHMENT PLATE BOLT SPACER 'A' 1.895 SPACER 'B' 1.083 3/8-16 X 3" POWER STEERING PUMP MOUNTING FLANGE 1" SPACER 7/16-14 X 5-3/4" SPACER C, .22" 3/8-16 x 2-3/4" 3/8-16 X 2-1/4" STAINLESS STAINLESS STEEL BOLT STEEL BOLT FACTORY POWER STEERING PUMP BOLT SUPPORT ROD 3/8-16 X 1" BOLT, AN 3/8" WASHERS 3/8-16 x 2" 3/8-16 X 1-1/2" FOR 1994-1995 MODELS ONLY Fig. 6B-a 7. COOLING FAN SPACER A. Thread t
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8. SUPERCHARGER MOUNTING A. Attach the supercharger drain hose to the fitting WARNING: The oil system contains a small on the bottom of the supercharger and secure orifice that is easily plugged. with the clamp provided. Make sure to rotate the DO NOT use any type sealant clamp so it does not interfere with the mounting on any of the threads. Instead, plate. use clean engine oil. Disas- semble and blow out entire line B. Mount the supercharger to the mounting plate if you have any doubts. with t
