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Mallory Ignition Mallory BILLET HEI DISTRIBUTORS 75_Series User Manual

Page 6

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MALLORY IGNITION

6

ADJUSTING THE REV LIMITER
The rev limiter is built into the HYFIRE HEI module
and is adjustable from 5000 to 9500 rpm in 100 rpm
increments. The rev limiter also has settings for 4 and
6 cylinder engines in case the module is transferred to
a 4 or 6 cylinder distributor.

Select the number of cylinders using the two bottom switches:

4 CYLINDER

6 CYLINDER

8 CYLINDER

Select the rev limit using the top six switches. The
minimum rpm (with all switches in the “off” position)
is 5000 rpm. For higher rpm limits, add the value of
the switches in the “on” position to 5000.

Examples:

5000 RPM

6500 RPM

8700 RPM

All switches in

the “OFF” position

5000 + 0 = 5000 RPM

5000 + 1000 + 400 + 100 = 6500 RPM

5000 + 2000 + 1000 + 400 +
200 + 100 = 8700 RPM