Appendix a - retard slope – Lingenfelter L460285297 & L460316109 Lingenfelter LNC-TRM Torque Reduction Module v1.2 User Manual
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Appendix A - Retard Slope
Rate of retard vs cylinder event (# of degrees added/removed per cylinder event)
0 (no ramp), 2, 4, 6, 8, 10, 15, 20, 25 & 30 degrees per cylinder event
Table of Change in Ignition Timing vs RPM and Retard Slope setting in Degrees per millisecond
(shown in red):
RPM
1000
2000
3000
4000 5000
6000
7000
events/
second =
67
133
200
267
333
400
467
Retard
slope
(deg/cyl
event)
0
NA
NA
NA
NA
NA
NA
NA
degrees
per ms
2
0.1
0.3
0.4
0.5
0.7
0.8
0.9
4
0.3
0.5
0.8
1.1
1.3
1.6
1.9
6
0.4
0.8
1.2
1.6
2.0
2.4
2.8
8
0.5
1.1
1.6
2.1
2.7
3.2
3.7
10
0.7
1.3
2.0
2.7
3.3
4.0
4.7
15
1.0
2.0
3.0
4.0
5.0
6.0
7.0
20
1.3
2.7
4.0
5.3
6.7
8.0
9.3
25
1.7
3.3
5.0
6.7
8.3
10.0
11.7
30
2.0
4.0
6.0
8.0
10.0
12.0
14.0
Table of Time Required to Ramp Timing Vs RPM and Retard Slope setting (for max retard at
that RPM point) in seconds (shown in red):
RPM
1000
2000
3000
4000 5000
6000
7000
Max
retard =
18
36
50
50
50
50
50
Retard
slope
(deg/cyl
event)
0
NA
NA
NA
NA
NA
NA
NA
seconds
for max
degrees
ramp (to
ramp in
or out
to full
amount
of timing
retard)
2
0.135
0.135 0.125 0.094 0.075 0.063 0.054
4
0.068
0.068 0.063 0.047 0.038 0.031 0.027
6
0.045
0.045 0.042 0.031 0.025 0.021 0.018
8
0.034
0.034 0.031 0.023 0.019 0.016 0.013
10
0.027
0.027 0.025 0.019 0.015 0.013 0.011
15
0.018
0.018 0.017 0.013 0.010 0.008 0.007
20
0.014
0.014 0.013 0.009 0.008 0.006 0.005
25
0.011
0.011 0.010 0.008 0.006 0.005 0.004
30
0.009
0.009 0.008 0.006 0.005 0.004 0.004