Edelbrock Performer 70011, Performer 70012 Information Manual

Catalog #70011, #70012
Rev. 07/08 - AJ/mc

©2008 Edelbrock Corporation

Brochure No. 63-70011

Page 1 of 5

Jet Map Information

Edelbrock engineering has conducted dyno testing with the Performer system to provide you with a baseline jet map. Your jet map
may change with the use of other components. These jet combinations are supplied with this system to enable you to vary your
engine’s power output.

Square Flange Jet Map

Spread-Bore Jet Map

Jet Map Footnotes:

Spark Plugs: All jetting combinations shown should use a spark plug one heat range colder than normal.

Fuel: All jetting combinations shown should only be used with 92 octane or higher pump gas.

Edelbrock recommends an NGK spark plug with a heat range of -9 to -11 depending on the nitrous power level being tuned. When
in doubt, always go to the next cooler heat range plug.

The dyno tests were conducted at Edelbrock using a highly modified Big Block Chevrolet. Modifications included Edelbrock intake
manifold, cylinder heads, dyno headers, pistons, rods, crankshaft, and improved ignition. These tests were conducted with 950 psi
nitrous and 6.5 psi fuel pressure. All stated timing adjustments listed in the jet map is where the motor being tested performed best.
Final timing should be adjusted to achieve best power and/or MPH per application.

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.

Approximate

HP Gain

Nitrous Jet Fuel Jet Timing Adjustment

50 38 38 1°-3° Retard
75 46 46 2°-4° Retard

100 57 57 3°-5° Retard

Approximate

HP Gain

Nitrous Jet Fuel Jet Timing Adjustment

50 40 40 1°-3° Retard
75 50 50 2°-4° Retard

100 59 59 3°-5° Retard

EDELBROCK JET MAP INFORMATION

For use in nitrous kits #70011 & #70012

Catalog #70011, #70012
Rev. 07/08 - AJ/mc

©2008 Edelbrock Corporation

Brochure No. 63-70011

Page 2 of 5

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. Edelbrock recommends setting your fuel pressure flowing. We offer
a flow tool (Edelbrock Part #76506) to help in this process.

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 type 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/Hypereutectic Pistons:

With all nitrous oxide applications, forged pistons are highly recommended. Because of heightened potential for detonation,
cast pistons and hypereutectic 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.