Autronica SM4 User Manual

SM4 Manual by MRM-Racing V3.0
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and the signal first goes negative, the reluctor adapter will generate a pulse but will not
trigger the Sm4 correctly resulting in incorrect ignition timing.
One Pulse per TDC
One Pulse per TDC is standard triggering for Autronic. It needs one pulse for each
cylinder for one complete engine revolution cycle (720 degrees, two crank turns, one
cam turn). This will give the following table for the cylinder pulse trigger:-
Cylinders
Tooth on
crankshaft
Tooth on
camshaft
1
N/A
1
2
1
2
4
2
4
5
N/A
5
6
3
6
8
4
8
10
5
10
12
6
12
16
8
16
One pulse per TDC tooth table
Warning:
An incorrectly wired reluctor will retard ignition timing as the RPM increases or
generate multiple triggers. If you are using magnetic triggers, make sure they are
wired with correct polarity and use Rising Edge triggering.

Autronica SM4 Specifications

General

Brand	Autronica
Model	SM4
Category	Control Unit
Language	English