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Discussion Starter #1
For anyone else out there who wishes to design their own cam profile for a specialized Insight application, I am making my piston velocity and acceleration analysis publicly available.

*Note this was all done useing my estimate of 4.9" rod legnth (I'm sure it extremely close, but I couldn't find the real rod legnth in the Helms manual). As soon as I find the real rodlegnth, I will update all the calculations.

Accelerations numbers are all calculated for 6,300rpm engine operation.

Zero Degrees is Bottom Dead Center

Piston Distance Piston Piston
From Deck Velocity Accleleration
Degrees (in) (ft/min) (g's)
0 3.24 -611.79 1192.20
5 3.25 -305.70 1169.27
10 3.26 4.33 1149.70
15 3.25 319.14 1133.58
20 3.24 639.55 1120.72
25 3.22 966.22 1110.64
30 3.19 1299.61 1102.56
35 3.15 1639.85 1095.35
40 3.10 1986.67 1087.49
45 3.05 2339.31 1077.09
50 2.98 2696.39 1061.89
55 2.90 3055.79 1039.29
60 2.82 3414.66 1006.44
65 2.72 3769.28 960.37
70 2.62 4115.09 898.18
75 2.50 4446.76 817.23
80 2.38 4758.26 715.42
85 2.25 5043.07 591.38
90 2.12 5294.37 444.69
95 1.97 5505.38 275.99
100 1.83 5669.61 87.04
105 1.67 5781.17 -119.37
110 1.52 5835.06 -339.50
115 1.37 5827.38 -568.98
120 1.21 5755.45 -802.93
125 1.06 5617.99 -1036.33
130 0.92 5415.06 -1264.19
135 0.78 5148.05 -1481.74
140 0.64 4819.64 -1684.63
145 0.52 4433.60 -1868.95
150 0.41 3994.76 -2031.35
155 0.31 3508.77 -2169.05
160 0.22 2982.01 -2279.78
165 0.15 2421.43 -2361.85
170 0.10 1834.39 -2414.06
175 0.06 1228.56 -2435.70
180 0.03 611.79 -2426.53
185 0.02 -8.04 -2386.78
190 0.03 -623.1040248 -2317.09
195 0.06 -1225.76 -2218.55
200 0.10 -1808.65 -2092.68
205 0.15 -2364.80 -1941.41
210 0.22 -2887.75 -1767.14
215 0.30 -3371.65 -1572.63
220 0.40 -3811.35 -1361.08
225 0.51 -4202.50 -1136.03
230 0.62 -4541.65 -901.34
235 0.75 -4826.31 -661.12
240 0.88 -5054.98 -419.61
245 1.01 -5227.22 -181.08
250 1.15 -5343.58 50.31
255 1.29 -5405.64 270.63
260 1.44 -5415.84 476.40
265 1.58 -5377.45 664.63
270 1.72 -5294.37 833.04
275 1.86 -5171.00 980.03
280 2.00 -5012.03 1104.78
285 2.13 -4822.30 1207.23
290 2.25 -4606.58 1287.99
295 2.37 -4369.44 1348.27
300 2.48 -4115.13 1389.76
305 2.59 -3847.48 1414.50
310 2.68 -3569.79 1424.74
315 2.78 -3284.87 1422.80
320 2.86 -2994.96 1411.03
325 2.93 -2701.80 1391.67
330 3.00 -2406.62 1366.78
335 3.06 -2110.19 1338.28
340 3.11 -1812.91 1307.83
345 3.16 -1514.81 1276.88
350 3.19 -1215.61 1246.67
355 3.22 -914.83 1218.19
360 3.24 -611.79 1192.20



http://www.ejlin.com/albums/album41/Ins ... stance.jpg

http://www.ejlin.com/albums/album41/Ins ... _graph.jpg


Now you guys can work to design manifolding and profiles with extremely helpful data to deal with the complex changes that the 14mm offset brings.

Best Wishes,
-Luke
 
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