Advertisement
Synchronized Chuff Patterns for RIM READING for 4 chuffs per revolution.
Cut pattern that suits wheel diameter and cut large enough to cover inside flange.
Mount pattern on inside flange (clearing center axle from pattern). Trim
excess beyond flange. Align optics to read pattern. Any external light shining
on the optical sense end will cause improper readings.
RIM READING for 2 chuffs per revolution
RIM READ
- shown mounted inside
truck.
Remember to shield the optic from stray light entering the pickup end. If light
does stike the sensor it can overcome the infra-red reflection creating the
loss of exhaust chuff synchronization.
Synchronized Chuff Patterns for AXLE READ, 4 chuffs per revolution.
mount optics inside chassis and read driver axle. This is the ultimate location,
when the drivers slip on the rails the sound follows! Common axle diameters
shown below. Select appropriate one (or make your own) and cut out, the
long black strip shows total circumference of the axle leaving 4 white stripes.
The chuff starts on the black stripe and ends at the end of the white stripe.
For correct synchronization, place the center of the black stripe facing the
optics when a piston (main rod) is at the center of it's travel.
If you prefer to paint the stripes, be sure that the black paint is a flat finish. A
gloss or semi-gloss will reflect as white / bare metal.
You can also read the high lobes of an existing cam.
Synchronized Chuff Patterns for Reading an Axle
10
The optic can also be mounted
perpindicular to the axle for
proper reading. Remember, it
must be mounted at least 1/8"
away from the reading area for
proper pickup.
Advertisement
