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Catalog Part #70402
Brochure No. 63-0164

©2003 Edelbrock Corporation

Rev. 02/03

Page 19 of 25

3.6

Microswitch Installation and Wiring (continuation)...

The bolts used to attach the microswitch have extra length to allow for spacing the microswitch away from the

bracket to offer a level of adjustability of the microswitch. After determining the position of the microswitch, we
recommend trimming the bolts for a clean installation.

Due to the wide variety of throttle linkage combinations in use, it is impossible to supply a microswitch bracket

custom-tailored to each application. The universal bracket supplied will need to be modified to fit your specific
application.

Here is a microswitch assembly mounted for use. It

is an example of one of many ways in which to mount
a microswitch on your throttle body. The microswitch
bracket allows for many different mounting positions.
The microswitch bracket can be modified to clear
almost any potential interference around the throttle
linkage.

The microswitch bracket supplied is drilled to permit

many different switch mounting positions.

This

flexibility allows for the microswitch to be positioned
in such a manner to engage the throttle body linkage
without interfering with its normal and safe operation. The bracket may be manipulated (bent, twisted, and/or cut)
to best suit your combination. Mount the microswitch on the throttle body so the actuation arm is triggered by the
throttle linkage making sure that all wiring and the bracket do not interfere with the smooth and safe operation of
the throttle body. Be sure the actuation arm “clicks” at the point where the throttle is wide open.

3.7

Final Electrical Installation Recommendations

At this time, it is advised that you double-check the following areas:

1.

Double Check 

all wires so that they do not come in contact with any heat sources like exhaust manifolds, and

EGR crossovers, etc.

2.

Double Check

the wires that lead from the microswitch to ensure that they do not interfere with the operation

of the throttle body linkage.

You are now ready to hook up your battery and prepare your vehicle to run.

Summary of Contents for 70402

Page 1: ...ous Spray Nozzle Installation 12 2 7 Fuel Pressure Safety Switch Installation 13 2 8 EFI Vacuum Tee Installation 13 2 9 Fuel Pump Installation 13 14 3 0 Electrical System Installation 3 1 Nitrous Elec...

Page 2: ...ation assumes no responsibility for damages incurred by the use of products manufactured or sold by Edelbrock Corporation on vehicles used for competition or racing Edelbrock General Warranty It is th...

Page 3: ...s Floor jack Razor blade or other sharp flat edged cutting instrument Vehicle jackstands Safety glasses Power Tools Power drill Drill bits You should understand the following skills Power tool safety...

Page 4: ...sore nasal passages Nytrous Plus was specifically created for automotive applications and is available for sale to the public at many speed shops across the USA Safety Steps For Working With Nitrous O...

Page 5: ...rtain components can be located to allow easy installation on vehicles with upgraded or modified equipment The microswitch brackets are designed to be manipulated bent cut twisted etc and the electric...

Page 6: ...sult in severe engine damage Fuel Quality Because Nitrous oxide is an oxidizer fuel selection is critical Both octane and fuel consistency affect fuel burn rate The oxidizer quality of nitrous oxide w...

Page 7: ...ea N2O Filter Fitting 4AN x 1 8 NPT Blue 1 ea 3AN x 1 8 NPT Nitrous Fitting Blue 1 ea Microswitch mounting bracket 1 ea 24 3AN steel braided hose 90 degree on one end Jets 1 ea Jet 047 1 ea Jet 049 1...

Page 8: ...vice or PRD It is a safety valve designed to vent the contents of the bottle into the atmosphere in case of a catastrophic event like a collision It is also installed to prevent the over pressurizatio...

Page 9: ...led so that the bottom of the siphon tube is at the bottom of the bottle opposite the bottle label An Edelbrock nitrous bottle cannot be mounted upside down Edelbrock does not offer a non siphon tube...

Page 10: ...es apart from each other 9 Install the bottle mounting brackets using Grade 8 bolts nuts and flat washers not included with kit Use fender washer underneath the vehicle for sheet metal mounting 10 Tig...

Page 11: ...ng outlet fitting plug solenoid tee and solenoid mounting screws 2 Hold one of the nitrous solenoids securely like in a bench vise being careful not to harm the solenoid or block the inlet or outlet p...

Page 12: ...lar and the feed line from solenoid to nozzle do not interfere with any systems or components of the vehicle such as the hood latching device 2 Mark where the nozzle will be placed 3 Remove the intake...

Page 13: ...he vacuum line that originally went to the vehicle s fuel pressure regulator onto the center barb fitting of the EFI vacuum tee Note The center barb can easily be identified by the anodized nut used t...

Page 14: ...secure with one of the supplied hose clamps 6 Install the male Ford Fuel Hose Adapter into the remaining end of the fuel hose and secure with one of the supplied hose clamps Connect the male Ford Fue...

Page 15: ...s also good practice to have a book that specializes on the specialized techniques required when working with vehicular electrical systems 3 0 Electrical System Installation Item Quantity Description...

Page 16: ...Catalog Part 70402 Brochure No 63 0164 2003 Page 16 of 25 3 2 Nitrous Electrical System Wiring Diagram...

Page 17: ...ting of your wires follow the Wire Harness Schematic on page 16 and use the Origin and Destination Map as a guide for which electrical connectors are used in each circuit Once you have decided the loc...

Page 18: ...ollar included with the switch for applications that require special spacing during installation 3 6 Microswitch Installation and Wiring The function of your microswitch is to enable your nitrous syst...

Page 19: ...erence around the throttle linkage The microswitch bracket supplied is drilled to permit many different switch mounting positions This flexibility allows for the microswitch to be positioned in such a...

Page 20: ...e holder 3 1 ea 16 18 splice connector 4 3 ea 14 16g 3 8 ring terminal Nylon insulated 5 2 ea 14 16g ring terminal 8 Stud Nylon insulated 6 1 ea 15 amp ATO blade fuse Fuel Pump Relay Wiring Schematic...

Page 21: ...es along the route of your wire harness as they can chafe the wire and cause your system to fail Locate the fuel pump wires which are located just above the fuel tank feeding in towards the in tank pu...

Page 22: ...completed the installation of you Edelbrock Nitrous System 5 0 Solenoid Inspection and Maintenance 1 Close the valve on the nitrous bottle Make sure all nitrous supply lines are free of pressure befo...

Page 23: ...lenoid a Repair replace solenoid See Solenoid Inspection and Maintenance section 2 Contamination in nitrous solenoid a Remove and inspect solenoid for dirt around seat area of plunger in solenoid Symp...

Page 24: ...wiring terminals i Replace microswitch 6 Inadequate nitrous supply a Weigh bottle i Bottle should be 10 lbs above empty bottle weight listed on bottle label when full b Check bottle temperature i Mai...

Page 25: ...vated Inadequate fuel delivery due to 1 Plugged fuel filter a Inspect fuel filter i Clean or replace filter 2 Crimped fuel line a Inspect fuel line i Replace crimped line 3 Weak or inadequate fuel pum...

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