Edelbrock 70050 User manual

EDELBROCK NITROUS SYSTEMS
PERFORMER RPM SERIES NITROUS SYSTEM
This instruction manual supports the following Kit Part Numbers:
Performer RPM Nitrous Systems #70050, #70051, and #70053

Thank You….
…for purchasing an Edelbrock Nitrous Oxide Injection System.
Nitrous Oxide injection is one of the most exciting performance enhancements for the dollar invested on
the market today. With the use of nitrous oxide come some important safety considerations. This
manual has been written to help you during the installation and use of your Edelbrock Nitrous System.
Please read it completely before you install and use your system. Please pay close attention to the
safety information at the beginning of each section. The information contained there specifically pertains
to each of the components and installation methodologies within the section.
Please take the time to read and understand the following….
By installing your Edelbrock Nitrous System, you indicate you have read this document and you agree
with the terms stated below.
It is the responsibility of the purchaser to follow all installation instruction guidelines and safety
procedures supplied with the Edelbrock Nitrous Systems. It is also the responsibility of the purchaser to
determine the compatibility of the product with the vehicle or the device on which the purchaser intends
to install it.
Edelbrock Corporation assumes no responsibility for damages occurring from misuse, abuse, improper
installation, improper operation, lack of responsible care, or all previously stated reasons resulting from
incompatibility with other manufacturers products and/or systems.
Edelbrock Corporation neither recommends nor condones the use of products manufactured or sold by
Edelbrock Corporation for use on vehicles, which may be driven on public roads or highways, and
assumes no responsibility for damages incurred by such use.
Edelbrock Corporation assumes no responsibility for damages incurred by the use of products
manufactured or sold by Edelbrock Nitrous Systems on vehicles used for competition or racing.

Before You Install Your Edelbrock
Nitrous System…
Please read this Installation manual fully before installing this system.
You will need to have available the following tools:
Hand Tools
Socket set including ratchets and extensions
Screwdrivers
Pliers
Bench vise
Wire crimping pliers, wire strippers
Floor jack
Vehicle jack stands
Measuring tape and placement markers
Timing light
Fuel pressure measurement gauge
Safety glasses
Power Tools
Power drill
Drill bits
You should understand the following skills:
Power tool safety procedures
Undercar safety procedures
Proper measuring techniques
Proper electrical assembly techniques
Basic engine operation and tuning techniques which include:
- Fuel pressure measurement techniques
- Timing adjustment techniques
Caution!!

WHAT IS NITROUS OXIDE?
Nitrous Oxide is a cryogenic gas composed of nitrogen and oxygen molecules. It is stored as a “gas
over a liquid” which means that both liquid and gaseous nitrous oxide is delivered into your engine. It is
36% oxygen by weight, which is what produces the added horsepower. By injecting more oxygen (and
a corresponding fuel signal), we create the additional power the same way a supercharger or a
turbocharger does.
Nitrous Oxide is considered an “oxidizer” and not a fuel. Therefore, nitrous oxide is non-flammable by
itself. Because nitrous oxide is a cryogenic, the same safety methods in handling dry ice apply to
nitrous. Direct contact with the skin will cause a burn similar to contact with dry ice. The exception in
using nitrous oxide comes from increased breathing hazards associated with the gaseous properties of
nitrous oxide.
Nitrous Oxide is offered for sale in two common grades, which are U.S.P., and Nytrous Plus U.S.P.
nitrous oxide is medical grade nitrous oxide. Its common use is dental and veterinary anesthesia as well
as use as a propellant in food such as canned whip cream. U.S.P. is not available to the public and
would provide no advantage in the making of horsepower over the automotive grade nitrous oxide.
Nytrous Plus was specifically designed for automotive consumption and differs from U.S.P. in that it
contains trace amounts of sulfur dioxide (100 parts per million or “PPM”) added to prevent substance
abuse. The Sulfur Dioxide is an irritant to all of your breathing passageways and will create sore throats
and 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 Oxide
1. Never inhale Nytrous Plus (Nitrous oxide (N2O) for vehicular use) as continued exposure can
cause death. Nytrous Plus has a maximum of 100 parts per million (ppm) of sulfur dioxide and
will cause irritation to nose and throat passageways.
2. When working around any high-pressure gas including nitrous oxide, take all precautions to
ensure that exposure to nitrous oxide is minimized.
3. Do not vent nitrous oxide to atmosphere in confined spaces. Only vent nitrous oxide in
well-ventilated and open areas.
4. Liquid nitrous oxide can cause burns to human flesh so protect all skin in and around your
hands, arms and face. Wear safety glasses and rubber gloves to protect from liquid nitrous
oxide splatter.
5. When venting down the nitrous system, vent the line down closest to the nitrous bottle.
6. Do not use any form of Teflon tape as sealant on fitting connections. Use only Teflon paste.
7. When washing components, ensure the clean components are completely dry, free of oils, and
solvents. Failure to remove all liquids could cause component or system failure.
8. Always turn the bottle off before making any repairs to the nitrous delivery system.
9. To safely release nitrous oxide in a pressurized line;
a. Position vehicle in a well-ventilated, unconfined space.
b. Turn bottle off.
c. Slowly turn the nitrous feed line at the bottle open until you hear a light hissing noise.
d. Allow the entire nitrous pressure to vent from the line.
e. Perform your work on the system.
f. Re-attach the nitrous line to the bottle.
g. Slowly open the nitrous bottle valve, listening for leaks.
h. Perform leak checks on all affected fittings and the bottle fitting.

1.0 Introduction To Your Edelbrock Performer RPM Nitrous Oxide System
….about this manual!
Within the pages of this manual is information, safety tips and operation instructions for your new
Edelbrock Nitrous System. Watch for these symbols to know where to go for information….
...... there is safety related information listed here.
.... shows where technical information about your specific vehicle or specific skills will help
during the installation.
1.1 General information
The Edelbrock Performer RPM Nitrous Systems are intended for use on domestic style V-6 and V-8
engines using single square-flange 4 bbl. carburetors (Part Number 70050), spread-bore 4 bbl.
carburetors (Part number 70051), and Dominator-flange carburetors (Part Number 70053). Horsepower
and torque increases can vary with engine displacement and equipment upgrades and modifications.
Approximate power increase estimates can be made based on the mass flow of nitrous oxide into the
engine.
These types of systems utilize an adjustable plate that sandwiches in between the carburetor and the
carburetor mounting pad on the intake manifold. The adjustability comes from the ability of the plate to
accept different orifice-sized jets. The plate has jet fittings at opposite ends of the plate that
control the amount of nitrous oxide and fuel flow into the engine.
This system has been designed with flexibility as to where certain components can be located within the
engine compartment. The electrical components have properly-sized and ample lengths of wire for
some flexibility on where voltage signals are intercepted on the electrical system.
The solenoid and microswitch brackets have a universal shape to allow for adjustability in placement
and location of these components. The solenoids have ample feed line lengths for many different
manifold, air cleaner, carburetor configurations and the microswitch bracket will allow for several
different positions.
This system includes the bottle, bottle feed line and universal footprint steel bottle brackets. The
mounting brackets also include rubber insulators to protect the surface of your nitrous bottle while in the
brackets. When installing your nitrous bottle, pay close attention to the installation instruction for the
location of your bottle. Ensuring the installation of your bottle does not compromise systems that may lie
under the potential location where you plan to drill mounting holes.
Call your local automotive store, motorcycle shop and race track for refilling of your bottle. Trust a
professional to properly fill your bottle and reference this manual when re-installing your new filled bottle
back into your vehicle.
Always take care when handling a full bottle of nitrous oxide. Please reference this manual for further
safety measures to take during the handling of a nitrous oxide bottle.
Please follow all safety methods during the installation of your Edelbrock Nitrous System, and follow all
vehicle regulations and road laws when using your nitrous system.

1.2 Jet Map Information
Edelbrock engineering has conducted dyno testing with the Performer RPM system to provide jetting
maps for the three separate plates at different jetting levels. These jet combinations are supplied with
this system kit to enable you to vary your engine’s power output. On a typical mildly-modified 350 cubic-
inch engine, you can expect the following approximate power gains for each of the jetting levels:
Square-Flange Jet Map
Spread-Bore Jet Map
Dominator-Flange Jet Map
Jet Map Footnotes
The jet map above has footnotes that offer the following instructions and technical information.
1. Use 1 heatrange colder plugs.
2. Use 2 heatrange colder plugs.
3. Use 92 octane pump gasoline or better.
4. Use 110 octane race gasoline or better.
5. Single Plane manifold only. DO NOT use a dual plane manifold at this horsepower level.
6. Advanced tuning required. Suggested timing adjustment is just a guideline. Engine component
modifications may affect timing.
The dyno tests were conducted at Edelbrock using a mildly-modified 350 cubic-inch engine. Both dual-
plane and open-plenum intake manifolds were tested to ensure validity of jetting maps for each
horsepower setting. Modifications included Edelbrock intake manifolds, Edelbrock aluminum heads,
dyno headers, and improved ignition. We also used different grades of fuel and colder plugs during the
testing. All stated timing adjustments listed in jet maps is where the motor being tested worked best.
Final timing should be adjusted to achieve best power and/or MPH per application. See section “5.0
Ignition Timing and Nitrous” for more info on timing selection.
Any variation in jetting patterns other than what is listed above and engine damage could occur. Please
contact the Edelbrock Technical Department with any questions you have concerning jetting patterns
and their effects on engine performance.
Horsepower settings of 200 and 250 are for single plane manifolds only. In testing, we found that dual
plane manifolds have some distribution problems at these super high flowrates that could cause engine
damage. Please contact the Edelbrock Technical department with any questions you have concerning
jetting patterns and their effects on engine performance when using a dual plane manifold.
Approximate HP Gains Nitrous Jet Fuel Jet Timing Adjustment Footnotes
100 57 57 3°-5° Retard 1, 3
150 68 68 5°-7° Retard 1, 3
175 78 78 6°-8° Retard 1, 3
200 85 85 7°-9° Retard 2, 4, 5, 6
250 99 99 9°-11° Retard 2, 4, 5, 6
Approximate HP Gains Nitrous Jet Fuel Jet Timing Adjustment Footnotes
100 59 59 3°-5° Retard 1, 3
150 71 71 5°-7° Retard 1, 3
175 81 81 6°-8° Retard 1, 3
Approximate HP Gains Nitrous Jet Fuel Jet Timing Adjustment Footnotes
100 57 57 3°-5° Retard 1, 3
150 71 71 5°-7° Retard 1, 3
200 85 85 7°-9° Retard 2, 4, 5, 6
250 104 104 9°-11° Retard 2, 4, 5, 6

1.3 Engine Operation Considerations
When used correctly, nitrous oxide safely elevates cylinder pressures and temperatures while increasing
combustion rate. These characteristics make the engine more sensitive to detonation. To ensure
proper performance and engine life, the following tips are suggested:
 Adequate Fuel Pressure and Delivery
When designing your fuel system, plan on your pumps and lines flowing at least 0.1 gallons per hour per
horsepower at rated pressure. The testing at Edelbrock was conducted with a fuel pressure of 6.5 psi.
Any variation from this fuel pressure will cause your final air/fuel ratio to change. Consult our technical
department for any questions on fuel pressure and its effects on final air/fuel ratios when using nitrous
oxide.
 Performer RPM Fuel System Requirements
When using the Performer RPM series kits, the potential horsepower gains are quite high. The critical
area for continued success with your nitrous system lies in the fuel system. In most cases, an auxiliary
fuel supply system will be a required addition to your nitrous system. A high flow electric fuel pump and
high capacity adjustable fuel pressure regulator are both recommended to ensure the fuel flow rate is
enough to ensure proper system operation. The minimum size we recommend for the fuel inlet feed line
is a –6 (3/8” inch), with a size of –8 (1/2” inch) recommended for the higher horsepower settings.
 Performer RPM System Monitoring Requirements
Fuel pressure and nitrous pressure gauges are very important. Your fuel pressure must be set properly
and a gauge is the only sure way to monitor system performance. The same is true of the nitrous bottle
pressure. A nitrous pressure gauge is the only way to ensure that your system calibrations are within
the parameters required of your horsepower setting.
 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 will accelerate the burn rate, so we recommend a
high quality of gasoline. We also recommend you use the same grade of gasoline every time you use
your nitrous oxide system. This will maintain the same fuel burn rate every time. Please refer to the jet
map footnotes for information on what fuel types and fuel qualities that were used during the testing here
at Edelbrock.
 Engine System Upgrades
With all performance modifications complementary system upgrades will always serve to elevate the
consistency and longevity of an engine, especially when using nitrous oxide as a power adder. Ignition
upgrades, intake manifold upgrades, and fuel controls and fuel pumps can all add to the performance of
a nitrous oxide injected engine.
 Cast Pistons
With all nitrous oxide applications, forged pistons are highly recommended. Because of heightened
potential for detonation, cast pistons are more prone to failure and cannot handle horsepower increases
over 125 hp. Never initiate your nitrous system before you are at full-load, wide-open throttle conditions.
Cast pistons will not be able to survive this kind of stress.

1.4 Performer RPM System Bill of Materials (BOM)
Quantity Description
Plates and Plate Hardware
1 ea Performer RPM Square-flange Plate, 70050 System
1 ea Performer RPM Spread-bore Plate, 70051 System
1 ea Performer RPM Dominator Plate, 70053 System
2 ea Square-flange gaskets, 70050 System
2 ea Spread-bore gaskets, 70051 System
2 ea Dominator gaskets, 70053 System
4 ea Long Carb Studs, 70050 System
4 ea 2 ea Long Carb Studs, 2 ea Long Carb Bolts, 70051 System
4 ea Long Carb Studs, 70053 System
Solenoids and Solenoid Hardware
1 ea Performer RPM Nitrous Solenoid (Black)
1 ea Performer RPM Fuel Solenoid (Red)
2 ea Solenoid Brackets with Screws (4 ea)
1 ea 12” Nitrous Feed Line (Blue), Solenoid to Plate
1 ea 8” Fuel Feed Line (Red), Solenoid to Plate
Fittings
1 ea N2O Filter Fitting, 4AN x 1/8” NPT, Blue
1 ea 6AN x 1/4” NPT Fuel Fitting, Red
1 ea 4 AN x 1/8” NPT Nitrous Fitting, Blue
1 ea 4AN x 1/8” NPT Fuel Fitting, Red
Bottle and Bottle Hardware
1 ea 10 lb. Nitrous Bottle
1 pr Nitrous Bottle Bracket Set, (1 Tall, 1 Short)
1 ea 660 Bottle Nut and Teflon Washer
1 ea 14’ Nitrous feed Line, bottle to solenoid
Electrical System Components
1 ea Electrical Component Package (see page 16 for BOM)
Technical Information
1 ea Performer System Information Packet

1.4 Performer RPM System Bill of Materials (Continuation)
Jets
Performer RPM Square-Flange Jet Pack P/N 70050
Performer RPM Spread-Bore Jet Pack P/N 70051
Performer RPM Square-Flange Jet Pack P/N 70053
2 ea. Jet, #57
2 ea. Jet, #68
2 ea. Jet, #78
2 ea. Jet, #85
2 ea. Jet, #99
2 ea. Jet, #59
2 ea. Jet, #71
2 ea. Jet, #81
2 ea. Jet, #57
2 ea. Jet, #71
2 ea. Jet, #85
2 ea. Jet, #104

2.0 Performer RPM System Installations
2.1 Nitrous Bottle Mounting
The nitrous oxide storage cylinder is typically called a “nitrous bottle”. The “bottle” is not unlike a scuba
tank. It is an aluminum cylinder, designed and manufactured to withstand very high pressures. The
valve on top of the bottle is a high-flow design that allows easy opening and close which controls the
nitrous flow to the engine compartment.
Accurate calibration of your nitrous system depends on the bottle remaining at a stable temperature. In
vehicles (such as Corvettes) where the bottle must be mounted in an area subject to direct sunlight, it is
suggested that the bottle be shielded with a bottle blanket.
If the bottle is mounted inside the passenger compartment or in a space that has access to the
passenger compartment such as hatchbacks or vehicles that feature fold down rear seats, the
pressure relief device (PRD valve) must be vented externally from the cockpit. This procedure will
prevent the passenger compartment from filling with a cloud of nitrous oxide, should the safety pressure
relief valve rupture.
Special consideration should be made to protect the bottle installation by not placing the bottle
in a known crumple or crash zone within the vehicle. At no time should the bottle be mounted
within the seating area of the passenger compartment of a street-driven vehicle.
Bottle Safety Information
1. Do not attempt to remove the bottle valve. Please return your bottle to Edelbrock if service
is required to the siphon tube inside the bottle or the bottle valve itself.
2. Never heat the outside of your nitrous bottle with an open flame such as a torch.
3. Do not strike the surface of your nitrous bottle with a heavy or sharp object.
4. Do not drop your nitrous bottle.
5. Do not attempt to grind off or destroy any imprinted markings on the face of the
bottle.
6. Do not remove, modify or otherwise tamper with the safety valve on the bottle valve.
Racing Vehicles
Before using the Edelbrock bottle mounting brackets to mount a nitrous bottle in a vehicle intended for
use in racing or sanctioned events, check with the sanctioning association or local race track for any
rules regarding bottle installation. Most associations require the bottle be mounted within the confines of
the safety roll cage, with the safety pressure relief cap vented away from the driver’s compartment.
Pressure Relief
Device
(PRD)
660 High Flow
Nitrous Exit
Bottle Valve Handle Pictured The Performer RPM Bottle Valve installed on all the bottle
valves used in Edelbrock Nitrous Systems is a Pressure Relief
Device or “PRD”. It is a safety valve designed to vent the con-
tents of the bottle into the atmosphere in case of a catastrophic
event, such as a collision.
It also serves to prevent the over-pressurization of the bottle
itself. Over pressurization can result from over-filling, exposure
to direct sunlight, or high-temperatures. It can also come from a
violent strike to the bottle surface.
It is illegal to tamper with, modify, or remove the PRD device.

2.2 Bottle Mounting Instructions
Choosing the proper location and orientation for your bottle can greatly affect the overall operation of the
nitrous system. Please read the entire bottle mounting instruction section before making your final bottle
location decisions.
2.3 Bottle Orientation
Bottle placement is critical to the performance of your nitrous system. It is important to understand how
the bottle valve and siphon tube are assembled to properly orient the bottle in your vehicle and ensure
that it picks up liquid nitrous while undergoing acceleration. All nitrous bottles are assembled so that the
bottom of the siphon tube is at the bottom of the bottle and opposite of the bottle label.
An Edelbrock nitrous bottle cannot be mounted upside-down. Edelbrock does not offer a non-siphon
tube bottle for automotive use. If the bottle must be mounted parallel to the axles of the vehicle
(sideways), the valve handle and label must be angled at approximately 45 degrees toward the front of
the vehicle. This orientation will position the siphon tube toward the rear and pointing to the lower rear-
facing quadrant of the bottle. All of this positioning information is critical to system operation. It is
important to draw as much liquid nitrous as possible. The siphon tube cannot do this unless the bottle is
positioned correctly.
The most efficient mounting is the lay-down position with the valve handle toward the front of the
vehicle and the bottle label facing up. This position allows the greatest amount of liquid to be used
before the siphon tube begins to pick up gaseous nitrous oxide.
The bottle in this location allows for access to other areas within the trunk,
does not interfere with access to the spare tire, and is away from the very rear
of the vehicle.
This bottle orientation also positions the end of the siphon tube for best liquid
nitrous draw.

2.4 Bottle Installation
After you have determined the location and orientation of the nitrous bottle, use the following
procedure to install the bottle:
2.4.1 Street Car Installations
1. Determine the location of the bottle within the confines of the rear of the vehicle.
2. Once a mounting location has been determined, raise the vehicle (following all
safety practices involved in working on a vehicle from under the vehicle) and verify
that there are no fuel lines, fuel tank(s), brake lines, emissions equipment, or
structural members in the way of potential mounting bolt locations.
3. Using the mounting bracket bolt holes as templates, mark an area for each of the
two (2) brackets with chalk, metal marking pen, scribe, or marking pen to locate the
bolt placements for drilling.
4. Drill two (2) 3/8” mounting holes for each bracket.
5. Install the bottle mounting brackets using Grade 8 bolts, nuts and flat washers (not
included with kit).
6. Tighten the mounting bolts using a thread locking chemical (not included with kit).
7. Install the rubber insulators within the bottle brackets.
8. Slip bottle into the mounting brackets.
9. Tighten bracket clamps as shown in the picture.
2.4.2 Race Car Nitrous Bottle Installations
Install the bottle brackets in accordance to race track and/or sanctioning body
rules. Contact the factory for assistance with meeting sanctioning body rules.
2.4.3 Nitrous Bottle Installations For Vehicles With Hatchbacks Or
Trunk Areas That Are Connected With The Passenger
Compartment.
Shown here is a bottle with a
bottle bracket properly
installed with the rubber
insulator. The distance
between the bottle brackets is
somewhat adjustable.
Remember, mount the short
bottle bracket at least 1” from
the bottom of the bottle, and
never cover any of the bottle
label with a bottle bracket.
Do not attempt to install the
bottle in the bracket without
the rubber insulator. The bottle
hoop on the bracket is
designed to include the
thickness of the insulator.

2.5 Nitrous Feed Line Mounting
1. Determine the route your main nitrous feed line will follow. Ensure the path does
not route the nitrous feed line too close to the exhaust system, suspension,
electrical lines/components and tires.
2. Attach nitrous supply line to bottle.
3. Feed nitrous line along proposed route.
4. Secure nitrous supply line to underside of vehicle.
Note: Stainless steel covering of the main nitrous feed line is very abrasive.
Shield painted components or sensitive system components like
electrical, fuel lines, brake lines or suspension components to prevent
them from contacting main feed line. Rubber hose can be slid over and
retained as a chafe guard.
5. Leave nitrous line loose pending installation of nitrous solenoid.
2.6 Solenoid Mounting
Use the following procedures to install the Performer RPM nitrous solenoid and fuel
solenoid.
Note: Remember to use Teflon paste only on pipe threads. Do not use Teflon tape.
Hint: Placement of the solenoid is often limited by the lack of possible mounting
locations in the engine compartment. However, if possible, observe the following
suggestions:
Solenoid Safety Information
1. Keep solenoid and lines away from exhaust components.
2. Trial fit the solenoids with all lines attached to ensure a proper fit.
3. Solenoids may be mounted sideways or upside-down, if necessary.
2.6.1 Preparing To Mount Your Solenoids
1. Locate the universal solenoid brackets and solenoid mounting screws.
2. These solenoid brackets can be modified to clear almost any potential interference
around the carburetor/plate mounting surface. Please look at the pictures or
potential solenoid mounting locations and adapt your brackets according to the
needs of your particular application.
Pictured here is an unmodified Performer RPM
solenoid bracket with a modified bracket with solenoid
attached, ready for installation on an intake manifold.
The modifications can be performed by clamping the
solenoid bracket in a bench vise, or by using wide jaw
pliers.

2.7 Nitrous Solenoid Mounting and Installation
1. Hold the nitrous solenoid securely (like in a bench vise) being careful not to harm the
solenoid or block the inlet or outlet of the solenoid.
2. Install nitrous filter fitting (Blue fitting 4AN X 1/4 NPT) using liquid Teflon in the inlet port of
the nitrous solenoid.
3. Install 4AN x 1/8 NPT (Blue straight fitting) using liquid Teflon in the outlet port of the
nitrous solenoid.
i. Remove nitrous solenoid assembly from vise.
ii Attach solenoid-mounting bracket to the bottom of nitrous solenoid.
iii. Verify desired mounting location for nitrous solenoid.
4. Install nitrous solenoid. If solenoid-mounting location is difficult to access, leave solenoid
loose so the solenoid inlet and outlet port can be easily accessed.
5. Leave wires loose for electrical system installation.
6. Attach nitrous feed line to solenoid. (blue fitting 4AN x 1/4 NPT).
2.8 Fuel Solenoid Mounting and Installation
1. Hold the fuel solenoid securely (like in a bench vise) being careful not to harm the
solenoid or block the inlet or outlet of the solenoid.
2. Install 6AN x 1/4 NPT fuel inlet fitting using liquid Teflon in the inlet port of the fuel
solenoid.
3. Install 4AN x 1/8 NPT (Red straight fitting) using liquid Teflon in the outlet port of the
nitrous solenoid.
4. Remove fuel solenoid assembly from vise.
5. Attach the universal solenoid-mounting bracket to the bottom of nitrous solenoid.
6. Verify desired mounting location for nitrous solenoid.
7. Install fuel solenoid. If solenoid-mounting location is difficult to access, leave
solenoid loose so the solenoid inlet and outlet port can be easily accessed.
8. Leave wires loose for electrical system installation.
Pictured here is the Performer RPM solenoid mounted on
an Edelbrock intake manifold using a modified solenoid
bracket. The modifications performed to a solenoid
bracket depend on many factors. The considerations of
solenoid placement are the same for both Nitrous and
Fuel. The modifications to the solenoid bracket pictured is
just an example. The modifications for all system
brackets will be different per your application.
The line length between the Performer RPM fuel solenoid
and the jet fitting on the injection plate is 8 inches. The
line length between the Performer RPM nitrous solenoid
and the jet fitting on the injection plate is 12 inches Other
factors or components that could potentially interfere with
solenoid placement are:
Water neck/thermostat housings
Water fittings
Distributor housings
Vacuum advance canisters
Air filter housings
Throttle linkage passageways
Valve covers and valve cover fasteners
EGR passageways.

2.9 Nitrous/Fuel Solenoid Disassembly and Inspection
1. Close valve on nitrous bottle.
2. Empty main nitrous supply line.
3. Remove solenoid from the engine and securely clamp it into a vise, taking great care not to
damage the solenoid.
4. Remove the solenoid cover-retaining nut from top of the nitrous solenoid.
5. Remove coil and housing from nitrous solenoid base.
6. Unscrew stem from nitrous solenoid base. Do this by using a solenoid stem removal tool or
by “double nutting” the stem and unscrewing the stem from the housing body. Do not use
pliers on solenoid stem; damage to the stem will result.
7. Remove the stem, spring and plunger from the solenoid base paying close attention to the
way they are assembled.
8. Examine the plunger seal for swelling, cuts and abrasions. The seal surface should be flat,
except for a small circular indentation in the center of the seal.
Note: A seal that has been contaminated or over-pressurized will bulge from exposure to
chemicals other than fuel or nitrous oxide. It can appear to extend down from the plunger
and be dome-shaped. A contaminated seal may return to its original shape if left out in
fresh air for approximately 48 hours. It may then be returned to service. If it does not return
to its original shape, it must be replaced.
9. Clean the solenoid body. Do not use an oil-based solvent to clean any part of the solenoid.
Remove all foreign matter and dirt. Make sure solenoid body is clean, dry and free of oils
before assembly.
10. Replace the O-Ring, plunger and piston spring.
11. Re-assemble solenoid by reversing disassembly procedure.

2.10 Nitrous Injection Plate installation
The Edelbrock Nitrous System injection plate is a precision-designed CNC-machined
component. It has been designed to safely introduce a precise, metered nitrous and fuel signal
to promote proper mixing and distribution into the intake manifold. The jet map on page 5 will
give you the proper jets to use for each of the power levels available for this plate.
The jet fittings are color-coded for use with nitrous (blue) and fuel (red). The red fitting faces the
front of the engine and the blue fitting faces the rear. The plate has been etched indicating
which of the gasket surfaces face upward. Look at the brass tubes, a properly
oriented plate will have the nitrous tube above the fuel tube ensuring the angled orifices
machined into the tube face orient to the floor of the intake manifold.
Use the following procedures to install injector plate:
1. Remove carburetor air cleaner.
2. Mark all vacuum lines and external connections attached to carburetor and disconnect
them.
3. Disconnect throttle linkage from carburetor.
4. Disconnect fuel line from carburetor.
5. Remove carburetor.
6. Remove stock carburetor studs and clean mounting surface.
7. Install extended carburetor studs supplied with kit. (70050, 70053 Systems)
7a. Install extended carburetor studs in front of manifold, and use extended bolts
when re-attaching carburetor on the rear of carburetor. (70051 system)
8. Install injector plate and gaskets supplied on intake manifold.
9. Install carburetor.
10. Re-connect linkage, all external vacuum lines and fuel line.
Note: Every precaution has been taken to ensure the cleanliness of our components during
the assembly of your Edelbrock Nitrous System. However, because of the importance of
the jets and their calibration, extra care should be taken before you install your jets.
Wash them thoroughly with carburetor cleaner or another non-oil based cleaner, before
installing them into the plate.
2.11 Solenoid/Plate Plumbing Installation
1. Choose the final mounting location for your solenoids and mount them solidly.
2. Install desired nitrous and fuel jets in the jet fittings on the plate. Remember the red fitting is
for fuel and the blue fitting is for nitrous. Mixing the jets up during installation can cause
engine damage.
3. Using the braided-steel line that has the “red” ends, install the line on the “red” jet fitting on
the plate and run the other end to the fuel solenoid. Make sure that you do not use any
thread sealant on these types of fittings. Tighten both ends of the line.
4. Using the braided-steel line that has the “blue” ends, install the line on the “blue” jet fitting on
the plate and run the other end to the nitrous solenoid. Make sure that you do not use any
thread sealant on these types of fittings. Tighten both ends of the line.

2.12 Electrical System Installation
Electrical Components Bill of Materials (BOM)
Nomenclature Descriptions:
ATO… the fuse configuration is ATO. When replacing this fuse, ask for an ATO fuse.
“a”… Amperage.
“g”… gauge of wire for that particular connector.
Item Qty. Description
1 1 ea. Activation Microswitch
2 1 ea. Activation Microswitch bracket
3 2 ea. Activation Microswitch mounting nut (#4-40)
4 2 ea. Activation Microswitch mounting screw (#4-40x1")
5 1 ea. 30 amp relay
6 1 ea. Wire Harness w/integral Relay/Fuse holder
7 1 ea. Red-lighted toggle switch
8 2 ea. 18/22g ring terminal #10 stud, Nylon insulated
9 1 ea. 14/16g ring terminal #10 stud, Nylon insulated
10 1 ea. 14/16g male spade connector, Nylon insulated
11 2 ea. 14/16g female spade connector, Nylon insulated
12 4 ea. 18/22g female spade connector, Nylon insulated
13 1 ea. 15a ATO blade fuse
14 1 ea. 14/16g 3/8" ring terminal
15 1 ea. Nylon Splice, Insulation Displacement (16/18g)

2.12.1 Electrical System Installation Procedures
Determine the location of the Relay and Fuse Holder wire harness. Most common
installations locate these components inside the driver’s compartment and close to the
fuse panel under the dash. You can also mount the Relay and Fuse Holder and
harness close to the battery. However, these connectors are water-resistant, not
waterproof, so care is required when mounting this assembly under the hood of your
vehicle.
Wire Schematic Origin and Destination Map
Wire Color System Origin Destination Terminal Used
Red Bat Voltage Relay Harness Bat. Volt. Signal Ring
Red Arming Switch Underdash Switched 12v Spade/Wire Intercept
Black Relay Ground Relay Harness Chassis Ground Ring
Black Solenoid Ground Solenoids Chassis Ground Ring
Black Arming Switch Ground Arming Switch Chassis Ground Ring
Blue Solenoid Power Relay Harness Solenoids Spade
White Microswitch Relay Harness Microswitch Spade
White Microswitch Arming Switch Microswitch Spade
2.13 Relay and Fuse Holder Installation
The wire harness attached to the relay and fuse holder includes 8 feet of color-coded wires to
make the electrical system installation for your Edelbrock Nitrous System as easy as possible.
We recommend you do not cut any lengths of wires from the wire harness or complete the
wiring of the nitrous system until all of the mechanical components are securely mounted in their
permanent locations.
Once all of the solenoids and switches are placed, then route the un-cut wires from the harness
to each location allowing enough wire length on each circuit to not interfere with operating
linkages, heat sources, brackets, etc. Pay particular attention to sharp edges along the route of
your wire harness, as they can chafe the wire and cause your system to fail.
After you have accounted for the routing of your wires, follow the Wire Harness Schematic on
page 18, and use the Origin and Destination Map as a guide for which electrical connectors are
used in each circuit.
Once you have determined the location of the relay and fuse holder, secure them with fasteners
(not included with kit) such as sheet metal screws, bolts and nuts, etc. Allow for some slack in
the red wire that connects the relay and fuse holders together.
When mounting your relay and fuse holder,
make sure the mounting surface is strong
enough to support servicing the relay and
fuse. Also, ensure you allow for some slack in
the wire that joins the fuse holder to the relay
mount. This will avoid any potential loss of
power due to stress on the wire harness.
The fuse is covered by the fuse mount
housing.
The relay for the Performer RPM System is 30
amps. The fuse is 15 amps.

2.14 Arming Switch
The arming switch is a red, lighted switch that is a “MASTER” arming switch for your nitrous
system. Without it, your nitrous system would be “on” all of the time and capable of coming on
anytime you go to wide-open throttle conditions. The switch when in the “armed” position is well
lit, therefore it should be placed in an obvious position, well within the line of sight and easy
reach of the driver.
2.14.1 Arming Switch Installation
1. Locate the final position of your arming switch.
2. Drill a .450” hole for the switch location.
3. Insert the switch from behind the mounting hole and secure with the switch nut.
4. Do not wire until all other mechanical components are in place. Please see the
electrical system installation instructions for further information.
Note: There is a collar included with the switch for applications that require special
spacing during installation.
2.15 Microswitch Installation and Wiring
The function of the microswitch is to enable your nitrous system. It should be installed
so that the switch is forced closed by coming in contact with the carburetor linkage only
at the wide open throttle position. The nitrous system must only function at fully-loaded
wide-open throttle operating conditions.
Microswitch Safety Information
1. Do not allow wiring from the microswitch to come in contact with heat sources on
the intake manifold such as EGR risers or passageways.
2. Do not run wires to the microswitch that can create interference with the operation
of the carburetor linkage.
3. The microswitch must be located in such a way as to be clear of the normal
operation of the carburetor linkage.
4. Do not directly expose the microswitch to liquids (water, gasoline).
Pictured here is an unmodified
microswitch bracket, and a “ready to
install” microswitch assembly.
The switch bracket has several
mounting positions available for
clocking of the switch. It also is of a
universal length and can be attached
to several positions on and around the
carburetor linkage.
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.