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Edelbrock engineering has conducted dyno testing with the Victor Jr. system to provide jetting maps for two separate plates at
different jetting levels. These jet combinations are supplied with this system to enable you to vary your engine's power output.
Approximate HP Gain
200
300
400
Approximate HP Gain
200
300
400
NOTES: All of the jet maps shown on this page were developed using a steady fuel pressure of 6.5 psi. Variations in fuel pressure
can create a rich or lean condition which could potentially damage the engine. All jet maps shown on this page require 110 Octane
or better race gas to prevent detonation. The provided timing adjustments represent a suggested guideline only, various engine
components will affect the ideal ignition point. Edelbrock recommends an NGK spark plug 2 heat ranges colder than what the engine
would run naturally aspirated for use with all power levels shown on this page. 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 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 information on timing selection.
Any variations in jetting patterns other than what is listed above and engine damage could occur. Please contact Edelbrock Technical
Department with any questions you have concerning jetting patterns and their effects on engine performance.
Edelbrock recommends an NGK spark plug with a heat range between -9 and -11, depending on the power level being used. When
in doubt, always go to the next cooler heat range.
The Victor Jr. Series Nitrous Systems are intended for single-plane manifolds only. Do not use a dual-plane manifold
with the Victor Jr. Series Nitrous Systems. In testing, we found that dual-plane manifolds have some distribution problems at these
super high flow rates that could cause serious engine damage.
Edelbrock Corporation, 2700 California Street, Torrance, CA 90503
©2008 Edelbrock Corporation
Rev. 6/08
JET MAP INFORMATION
DOMINATOR-FLANGE JET MAP
Nitrous Jet
35
50
59
SQUARE-FLANGE JET MAP
Nitrous Jet
35
48
57
Tech Line: (800) 416-8628, Office: (310) 781-2222
Tech Fax: (310) 972-2730
Tech E-Mail: edelbrock@edelbrock.com
Page 2 of 2
Fuel Jet
35
50
59
Fuel Jet
35
48
57
Timing Adjustment
7°-9° retard
11°-13° retard
15°-17° retard
Timing Adjustment
7°-9° retard
11°-13° retard
15°-17° retard
Catalog #70014 & 70015
Brochure # 63-0181
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