AEM Infinity Supported Applications - Universal V8 Engine - Manual (Page 18)

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© 2014 AEM Performance Electronics
MSD 2345 Cam Sync Distributor
The MSD 2345 Cam Sync distributor outputs both an 8 tooth per cycle VR crank position signal and a
single VR cam position signal. As the distributor comes assembled from the factory, a crank trigger
tooth is being sensed at the same time that the cam trigger is being sensed. Ideally, the cam signal will
occur with some “buffer” time before the next crank tooth is sensed by the crank sensor. The cam
sensor mount on the MSD 2345 distributor is adjustable allowing the cam signal to be moved relative to
the crank signal. The following instructional describes how to adjust the distributor for proper setup and
assumes that the distributor will be installed into the engine so that the cap hold down hardware is
crosswise with the engine with the cam and crank sensor wires exiting on the even-cylinders side of the
engine. Terminal #1 will point toward cylinder #1.
**NOTE** AEM recommends thoroughly testing any "dual sync" style distributor to ensure that it offers
acceptable ignition timing control.
1. Mark distributor base with terminal #1 location and remove distributor cap.
2. Measure distance from back of cam sensor to sensor mount; record for future reference.
3. Back off cam sensor lock nut and remove cam sensor. Notice that the housing behind the cam sensor
mount collar is “windowed” allowing for the cam sensor location to be adjusted.
4. Rotate distributor shaft in direction of normal rotation (CW for Chevy) until cam trigger magnet is visible
in cam sensor hole. Notice that cam trigger magnet is inline with rotor when rotor is at center
adjustment.