- 9 -
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:
remove sparkplug from cylinder head and place dial gauge
find TDC (Top Dead Centre)
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
remove dial gauge and place sparkplug back to cylinder head
start engine and run with constant revs of about 3000rpm, or 4000rpm
use stroboscope light to check, if marks on rotor and stator align
adjust static angle with programmer to align marks on the rotor and stator
Result of above procedure is very accurate static angle.
13.
COMPENSATION
It is compensation of signal delay from pickup to spark plugs. You can check this delay
with stroboscope lamp. Without this compensation, ignition advance angle decreasing
with rising revs.
Compensation helps that ignition advance is correct (accurate).
How to check, if compensation is correct:
Set flat ignition curve...16deg advance is suitable for most engines
Measure with stroboscope lamp, if mark at flywheel moving when changing revs. If mark
moves, then change compensation delay.
Change Compensation:
Enter
Set Ign.
menu and move to
Compensation
with pressing
'
+
'
, or
'
-
'
and press
'
ENTER
'
to confirm.
Set
Compensation
with pressing
'
+
'
, or
'
-
'
and press
'
ENTER
'
to confirm.
(
)
(
)
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
