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Demon Fuel Systems 1902 User Manual

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Table of Contents

INTRODUCTION ..................................................................................................................................................................... 3

Recommended Parts and Accessories ............................................................................................................................... 3

Removal of Existing Carburetor .......................................................................................................................................... 3

Installation of Street Demon™ Carburetor ......................................................................................................................... 4

Connecting the Throttle Linkage ......................................................................................................................................... 5

Connecting the Transmission Linkage ............................................................................................................................... 5

GM TH350, 200R4 /700R4 .................................................................................................................................................. 5

Ford Kick-Down Linkage .................................................................................................................................................. 6

Chrysler Applications ....................................................................................................................................................... 6

Vacuum Lines ........................................................................................................................................................................ 7

Electric Choke ....................................................................................................................................................................... 7

Air Cleaner ............................................................................................................................................................................. 8

Priming the Carburetor ......................................................................................................................................................... 8

Mechanical Fuel Pump ...................................................................................................................................................... 8

Electric Fuel Pump ............................................................................................................................................................ 8

Ladies and Gentlemen, Start Your Engines! ...................................................................................................................... 8

Preliminary Tuning and Adjustments ................................................................................................................................. 8

Curb Idle Speed and Mixture Adjustments ......................................................................................................................... 8

Fuel Pressure......................................................................................................................................................................... 9

PERFORMANCE TUNING AND ADJUSTMENT ................................................................................................................. 10

Secondary Air Valve Tuning .............................................................................................................................................. 10

Accelerator Pump Tuning and Adjustment ...................................................................................................................... 10

Main Metering Tuning ......................................................................................................................................................... 11

Theory of Operation ........................................................................................................................................................ 11

Tuning ............................................................................................................................................................................... 12

Steady State Cruise Tuning ........................................................................................................................................ 13

Part Throttle Acceleration Tuning (25% to 75% throttle) ......................................................................................... 13

Choosing the Correct Metering Rod and Step-Up Springs ..................................................................................... 13

Wide Open Throttle Tuning ......................................................................................................................................... 13

Long Duration Camshaft Tuning ................................................................................................................................ 14

Tuning for Elevation .................................................................................................................................................... 14

Removal and Installation of Metering Rods, Step-Up Springs and Jets ....................................................................... 14

Metering Rod and Step-Up Spring Replacement ......................................................................................................... 14

Primary/Secondary Jet Replacement & Float Level Check & Adjustment ................................................................ 14

Winter Fuel ........................................................................................................................................................................... 16

Care and Cleaning ............................................................................................................................................................... 16

Troubleshooting .................................................................................................................................................................. 16

Demon Carburetion™ Limited Warranty .......................................................................................................................... 20

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