Catalog #70024 & 70025
Brochure No. 63-0182
Page 4 of 6
©2008 Edelbrock Corporation
Rev. 6/08
Engine Operation Considerations
W
hen 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, engine and drive line life, the following tips are suggested:
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Adequate Fuel Pressure and Delivery
When designing your fuel system, plan on your pumps and lines flowing at least 0.10 gallons per hour per horsepower. The testing at Edelbrock
was conducted with a fuel pressure of 6.5 psi. Any variations 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.
•
Victor Jr. Fuel System Requirements
When using the Victor Jr. Series Kits, the potential horsepower gains are extremely high. The critical area for continued success with your nitrous
system lies in the fuel system. In the case of the Victor Jr. Series Nitrous Systems, an auxiliary fuel supply system is 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.
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Victor Jr. 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 be ensure that your system
calibrations are within the parameters required of your horsepower settings.
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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 help maintain the same fuel burn rate every time.
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Cast/Hypereutectic 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 125hp.
Due to this fact,
the Victor Jr. Nitrous Systems require that the engine
has forged pistons.
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.
•
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. Modifications such as ignition upgrades, free-flowing exhaust, camshafts, cylinder heads,
and manifolds can all add to the performance of a nitrous oxide-injected engine.
