Theoretical Mini Perf Estimator
by: Kurlon
Motor - 52.4 mm x 55.5 mm - 119.69 cc / 7.33 ci
Bore : Stroke Ratio - 0.94 : 1
Rod Length - 101.95 mm
Rod : Stroke Ratio - 1.837 : 1
Estimated Cylinder Length assuming 19.5 mm piston pin height - 79.00 mm
Max RPM - 10983 RPM with a cast piston (4000' per min max)
Max RPM - 16475 RPM with a forged piston (6000' per min max)
Motor Perf Estimate Chart
RWHP estimate with 15% drivetrain loss
Mach| 0.19 0.26 0.32 0.39 0.45 0.52 0.58 0.65 0.71 0.77 0.84 0.90 0.97 1.03 1.10
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21 | !!
20 | !!!!!!
19 | !!!!!!!!!!
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13 | ###!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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11 | ###########!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
10 | ##############!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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8 | ######################!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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1 | ########################################!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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| 3 4 5 6 7 8 9 1 1 1 1 1 1 1 1
| 0 0 0 0 0 0 0 0 1 2 3 4 5 6 7
| 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
| 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
| 0 0 0 0 0 0 0 0
Crank / Rod / Piston relationships chart
Crank | Rod | Piston | Piston | Piston
Angle | Angle | Angle | Deck | Relative
ATDC | | | Height | Velocity
------+-------+--------+----------+-------
0 | 180 | 0 | 0.00 mm | 0.000
5 | 173 | 1 | 0.13 mm | 3.075
10 | 167 | 2 | 0.54 mm | 6.112
15 | 160 | 4 | 1.20 mm | 9.075
20 | 154 | 5 | 2.12 mm | 11.929
25 | 148 | 6 | 3.28 mm | 14.640
30 | 142 | 7 | 4.67 mm | 17.176
35 | 136 | 8 | 6.27 mm | 19.510
40 | 129 | 10 | 8.06 mm | 21.615
45 | 123 | 11 | 10.03 mm | 23.471
50 | 117 | 12 | 12.15 mm | 25.061
55 | 112 | 12 | 14.40 mm | 26.372
60 | 106 | 13 | 16.75 mm | 27.398
65 | 100 | 14 | 19.17 mm | 28.135
70 | 95 | 14 | 21.65 mm | 28.588
75 | 89 | 15 | 24.15 mm | 28.762
80 | 84 | 15 | 26.66 mm | 28.669
85 | 79 | 15 | 29.15 mm | 28.326
90 | 74 | 15 | 31.60 mm | 27.750
95 | 69 | 15 | 33.99 mm | 26.963
100 | 64 | 15 | 36.30 mm | 25.988
105 | 59 | 15 | 38.52 mm | 24.847
110 | 55 | 14 | 40.63 mm | 23.565
115 | 50 | 14 | 42.63 mm | 22.165
120 | 46 | 13 | 44.50 mm | 20.667
125 | 42 | 12 | 46.23 mm | 19.091
130 | 37 | 12 | 47.83 mm | 17.455
135 | 33 | 11 | 49.28 mm | 15.774
140 | 29 | 10 | 50.58 mm | 14.060
145 | 26 | 8 | 51.73 mm | 12.324
150 | 22 | 7 | 52.73 mm | 10.574
155 | 18 | 6 | 53.58 mm | 8.815
160 | 14 | 5 | 54.27 mm | 7.053
165 | 10 | 4 | 54.81 mm | 5.289
170 | 7 | 2 | 55.19 mm | 3.526
175 | 3 | 1 | 55.42 mm | 1.763
180 | 0 | 0 | 55.50 mm | 1.763