Ö
program CDI with measured approximate static angle
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program CDI with flat ignition curve...16deg advance is suitable for most engines.
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find information about engine stroke and conrod length
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convert programmed flat ignition advance angle to millimetres
Example:
α
=16deg (ignition advance)
L=110mm (conrod length)
R=54/2=27mm (engine stroke divided by 2)
T=1,3mm (calculated ignition advance in mm)
Equation for calculating from degrees to millimetres:
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remove sparkplug from cylinder head and place dial gauge
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find TDC (Top Dead Centre)
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rotate engine backwards (opposite from engine running rotation) to calculated
advance in millimetres (in example is 1,3mm) and make marks on rotor and stator
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remove dial gauge and place sparkplug back to cylinder head
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start engine and run with constant revs of about 3000rpm, or 4000rpm
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use stroboscope light to check, if marks on rotor and stator align
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adjust static angle with programmer to align marks on the rotor and stator
Result of above procedure is very accurate static angle.
(
)
(
)
2
2
sin
cos
1
mm
in
length
conrod
mm
in
2
by
divided
stroke
engine
mm
in
advance
ignition
degrees
in
advance
ignition
α
α
α
⋅
−
−
−
⋅
+
=
=
=
=
=
R
L
R
L
T
L
R
T
