©2004 Edelbrock Corporation
Brochure No. 63-0190 - DC/mc
Rev. 03/04
Catalog #70003 & #70004
Page 6 of 28
1.2
Jet Map Information
Edlebrock engineering has conducted dyno testing with the 2-Stage Performer RPM System to provide jetting maps
for the 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. On a typical mildly-modified 350 cubic inch engine, you can expect the
following approximate power gains for each of the jetting levels:
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 jet maps for each horsepower setting. Modifications
included Edelbrock intake manifolds, Edelbrock aluminums heads, dyno headers, and improved ignition. We also
used different grades of fuel and colder plugs during the testing. Final timing should be adjusted to achieve best
power and/or MPH per application. See section
“Ignition Timing and Nitrous” for more information on timing
selection.
These jet patterns are designed to be rich and will provide the above listed power settings under normal operational
usage of this system. 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.
