AiM MyChron4 660 - Manual (Page 11)

MyChron4 660
User Manual
Release 1.03
www.aim-sportline.com 10
1.6 – How to install the Speed sensor
In order to sample the dragster’s speed, you have to install a phonic wheel
(jackshaft collar) on the jackshaft (¾” diameter) moved by the clutch. The
movement of the jackshaft and the movement of the wheel are related to the
crown/pinion ratio. An installation layout of the speed sensor and magnetic phonic
wheel is shown in the figure below.
Primary V-type belt drive
Rear wheel Rear wheel
Secondary chain drive
Phonic wheel
Sensing distance 4 - 8 mm [0.15 - 0.3 "]
Rear axle Rear axle
Magnetoresistive speed sensor
ENGINE