Demon Fuel Systems 1905 - Manual (Page 2)

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Table of Contents
INTRODUCTION ..................................................................................................................................................................... 2
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 ....................................................................................................................................................... 7
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
INTRODUCTION
Street Demo
n™ Carburetors™ have many unique features that make them one of the best
performing carburetors in the market! Whether it is street / strip performance, or just getting the most
out of your hot rod, the Street
Demon™ will give you optimum performance. This manual will
discuss the special points and unique features of the carburetor, and the correct procedures for
proper installation and tuning. The goal is to help you understand the thoughts behind the Street
Demon
™, and to increase your knowledge of carburetion. Please read and understand this manual
completely to assure that you get the most out of your new Street Demon
™ carburetor.