Originally Posted by cobradav' post='238566' date='Feb 11 2006, 05:21 PM

Well crap, I won't be adding to the body of knowledge for awhile. Finally finished swabbing the deck, clean up and load up the Gtech for trial run(s). Get to my selected spot and boy is it busy. Anyway get the thing calibrated, trial run for level set, and then a real run, but aborted when I sawa how bogged down I got. Tried another, and a little better but had to back off for traffic. Got turned around and the rains came and hard (only rain in last 7 days) so I was going to cruise home, stopping to get a serial to USB connector. About 10 minutes into the return trip all text disappears from meter (backlight still on). DC Adapter haas switch turn of and on and only backlight comes up, text never came back. Turned off, came home, plugged into AC and still no text (have backlight). Sent Telsa an email asking for RMA. Sh*t. Can't even test the download into PASS. It'll be at least two weeks before I'm back in the game as I leave for Seattle next week.

Oh, well what can I say. Not impressed with quality control to say the least.

Originally Posted by grogan545' post='238674

But how do we explain the other run where 6216 rpm is only 59.84?Again I will fall back on my limited knowledge of microprocessors from industry.A microprocessor does,t record all info simultaneously but records data in a serial fashion one after the other on a very fast scale.So it is not necessarily looking at speed and rpm at the same time.It could be that this device is looking at time & rpm more often than it is looking at speed,therefore sometimes the speed doesn,t seem to match the rpm,s.

Originally Posted by grogan545' post='238674' date='Feb 11 2006, 09:41 PM

Having said all that I may be full of crap.I just looked at the speed,time,and rpm of the 2 to 3 shift and noticed that the Pro RR has somehow mixed data between the 3 examples .The time & speed on the first listed data obviously belongs with the 6090rpm.Both 6216 rpm should have the same speeds,but i don't know how to reconcile the times.I think I am confusing myself.Am I making any sense to you Znod?

Originally Posted by Znod' post='238690' date='Feb 11 2006, 10:34 PM

I think of the power/RPM reduction as being the beginning of the shift. And, let's say the shift does take .11 sec. That seem OK, I guess, but note the following. It implies that RPM increases during the shift, starts dropping at 6,217, and does not begin to climb again for .67 (6.2 -5.53) secs.--which sounds pitiful to me.

5.38 289.56 60.39 0.249 166.3 141.9 6154
5.39 290.44 60.44 0.247 165.4 141 6159
5.4 291.35 60.49 0.246 164.6 140.2 6164
5.41 292.23 60.53 0.245 163.9 139.5 6169.....Look here.
5.42 293.12 60.58 0.244 163.3 138.9 6174
5.43 294 60.63 0.243 162.7 138.3 6179
5.44 294.91 60.67 0.241 162.1 137.7 6184
5.45 295.79 60.73 0.24 161.5 137 6189
5.46 296.68 60.78 0.239 161 136.5 6194
5.47 297.56 60.83 0.238 160.5 136 6199
5.48 298.47 60.88 0.238 160.2 135.6 6204
5.49 299.38 60.94 0.237 160 135.4 6208
5.5 300.27 61 0.237 160 135.3 6210
5.51 301.15 61.05 0.237 160.1 135.3 6212
5.52 302.03 61.11 0.237 160.3 135.5 6213
5.53 302.94 61.16 0.238 160.8 135.8 6215.....Look here
5.54 303.82 61.2 0.238 161.2 136.4 6207
5.55 304.73 61.26 0.239 161.8 137.4 6185
5.56 305.65 61.31 0.24 162.5 138.5 6162
5.57 306.56 61.35 0.24 163.2 139.6 6139
5.58 307.45 61.41 0.241 164.1 140.9 6117
5.59 308.33 61.46 0.242 164.8 142.1 6091
5.6 309.24 61.5 0.243 165.6 143.4 6062
5.61 310.12 61.55 0.244 166.4 144.9 6033
5.62 311.04 61.61 0.245 167.2 146.2 6005
5.63 311.95 61.66 0.246 168.2 147.8 5977
5.64 312.86 61.71 0.248 169.1 149.3 5948
5.65 313.74 61.77 0.249 170 151.1 5911
5.66 314.67 61.82 0.25 171.2 153.1 5873
5.67 315.58 61.88 0.252 172.4 155.1 5835
5.68 316.48 61.94 0.253 173.6 157.3 5798
5.69 317.36 61.99 0.255 174.7 159.3 5759
5.7 318.31 62.04 0.256 175.8 161.6 5715
5.71 319.2 62.1 0.257 176.8 164.1 5659
5.72 320.14 62.15 0.258 177.6 166.5 5603
5.73 321.01 62.2 0.259 178.3 168.8 5548
5.74 321.95 62.27 0.26 178.9 171.1 5491
5.75 322.85 62.32 0.26 179.4 173 5445
5.76 323.79 62.37 0.261 179.8 174.7 5406
5.77 324.67 62.43 0.261 180.2 176.3 5367
5.78 325.6 62.49 0.262 180.8 178.2 5329
5.79 326.51 62.55 0.262 181.5 180.2 5290
5.8 327.44 62.61 0.263 182.4 182.3 5254
5.81 328.35 62.67 0.264 183.4 184.5 5220
5.82 329.26 62.73 0.266 184.5 186.8 5186
5.83 330.2 62.8 0.267 185.7 189.3 5152
5.84 331.13 62.85 0.269 186.8 191.7 5117
5.85 332.03 62.92 0.27 188 194.1 5085
5.86 332.95 62.97 0.271 189 196.5 5053
5.87 333.88 63.03 0.272 190 198.7 5021
5.88 334.84 63.1 0.274 191.1 201.1 4989
5.89 335.72 63.15 0.275 191.9 203.4 4957
5.9 336.66 63.22 0.276 192.9 205.6 4928
5.91 337.59 63.28 0.277 193.8 207.6 4903
5.92 338.52 63.34 0.278 194.6 209.5 4879
5.93 339.44 63.41 0.279 195.5 211.5 4855
5.94 340.38 63.47 0.279 196.2 213.3 4831
5.95 341.31 63.53 0.28 196.8 215.1 4806
5.96 342.23 63.59 0.281 197.5 217.1 4776
5.97 343.18 63.66 0.281 198.2 219.4 4744
5.98 344.12 63.72 0.282 198.8 221.6 4712
5.99 345.06 63.78 0.283 199.5 223.9 4680
6 345.97 63.84 0.283 200.1 226.2 4647
6.01 346.93 63.9 0.284 200.8 228.3 4619
6.02 347.87 63.96 0.285 201.5 230.5 4592
6.03 348.8 64.02 0.285 202.1 232.6 4564
6.04 349.72 64.08 0.286 202.8 234.7 4537
6.05 350.67 64.14 0.286 203.1 236.5 4510
6.06 351.62 64.21 0.286 203.5 237.7 4496
6.07 352.55 64.27 0.287 203.8 238.9 4482
6.08 353.49 64.34 0.287 204.2 240 4468
6.09 354.45 64.4 0.287 204.4 241.1 4453
6.1 355.39 64.46 0.287 204.7 242 4441
6.11 356.33 64.53 0.287 205 242.9 4433
6.12 357.27 64.6 0.287 205.4 243.9 4424
6.13 358.22 64.66 0.288 205.9 244.9 4415
6.14 359.15 64.73 0.288 206.3 245.8 4407
6.15 360.13 64.8 0.288 206.7 246.7 4399
6.16 361.05 64.86 0.288 207 247.3 4397
6.17 362.03 64.92 0.289 207.3 247.6 4397
6.18 362.96 64.98 0.289 207.6 247.9 4398
6.19 363.94 65.05 0.289 208 248.3 4399
6.2 364.89 65.12 0.289 208.3 248.7 4399.....Look here.
6.21 365.85 65.18 0.289 208.6 249 4400
Maybe, but what's going on is way over my bow. You probably don't know that expression. There was a time at UT-Austin when all the sorority girls were wearing bows in their hair. And, there was a comedy group that used to satirize their dumbness. So, pretty much anything was over their bows.
Right, I think. Maybe. I was getting at all these inconsistencies, I think, in the A, B, C conversation. I am to tired to think now. It all definitely is over my bow right now. I am very confused. I think we have to take what the meter says about some things as gospel and try to use the data given by download in other ways without trying to reconcile everything. If not, the the download data is worthless or the meter is worthless--except for getting the download data. For now, I am going to assume that both have value. But, hey, what about the .67 value I calculated above?

And, I have raised the following issue before, but I don't think you have responded. Why, in all gears, does the tach show shifts ending at, or in my current case sometimes a little above, redline. I mentioned before, in effect, that I think the tach is calabrated to make us feel good--like shifting always ends at redline--6,500 RPM--which I still think it should, but don't think it does. Wowie!!!

Originally Posted by Bokke' post='238414' date='Feb 11 2006, 12:13 PM

Did a couple of runs this morning:

Temp:40F
Hum: 27%
Wind: N25
Direction: East/West
DTC: off
launch RPM: 1,000 - 1,500

#1 #2 #3 #4 #5 Avg
0-80 9.90 - 8.92 - 9.60
0-70 7.82 7.53 7.20 7.50 7.55 7.52
0-60 5.70 5.55 5.55 5.52 5.58 5.58
0-50 4.37 4.30 4.35 4.25 4.27 4.31
0-40 3.30 3.32 3.38 3.20 3.27 3.29
0-30 1.97 2.00 2.10 1.93 2.00 2.00
0-20 1.20 1.20 1.33 1.15 1.20 1.22
0-10 0.37 0.35 0.50 0.35 0.35 0.38

1/8 9.30 9.20 9.17 9.15 9.20 9.20
75.90 76.2 79.9 77.2 76.8 77.2

300ft 6.02 6.00 6.08 5.95 6.00 6.01
60ft 2.13 2.15 2.25 2.10 2.15 2.16

HP -- 341 360 324 336 272

Had some traction issues on the first couple of runs as I think my tires were just to cold, so I did not list them. I did set the "speed limit" chime at 62mph so I would not shift into 2nd until I heard the chime. RPM seemed to be about 6,200. This seemed to help. As you can see my best-to-date (5.52) also has my best 60ft time (2.10). I am still getting wheel spin at launch - this is just going to take practice - as I think this is my key to better 0-60 times. Today I did get significant wheel spin shifting into 2nd - on one run the whole backend twitched to the right and I aborted the run

I might go and try a couple later today when the temp is supposed to be about 10 degrees warmer.

Cheers,

Originally Posted by grogan545' post='238859

I did some more research on tire size and found the following on your tire:
Dia.- 25.6"
Rev/mile- 814
Using my method of calculating speed note the following:
25.6/pi=80.42"
80.42/12=6.702'
6.702/3.38=1.983/2.34=.8473' per rev
.8473X6261=5267'
5267/5280=.9975
.9975X60=59.85 mph
6261=59.85 mph

Originally Posted by grogan545' post='238859' date='Feb 12 2006, 07:55 AM

Check your Pro RR data at 6216 rpm.Speed is 59.84 mph.I would say the Pro RR numbers are very accurate at the shift point,but when you look at speed vs rpm in the raw data it does not match(6215=61.16 mph).It looks like the rpm's lag the speed in the raw data??Very puzzeling.Maybe a call to Tesla for an explanation is in order.

ps: if I take your speed at 6216 rpm(59.85) divided into the speed indicated inthe raw data(61.16) I get 6352rpm=61.16 mph.Pretty close to my shift point observations.

Originally Posted by Znod' post='238908' date='Feb 12 2006, 10:13 AM

Good grief! You are right. I am glad we check each other. I picked up the revs for 285 X 30-19's. Thanks for finding this mistake; it might make some things more in agreement. And, I quess you do have a slight rear-end advantage ((714 / 707)3.38) = 3.41

Originally Posted by Znod' post='238908' date='Feb 12 2006, 10:13 AM

Very interesting. And, you must be thinking of the point right before your RPM drop.
Good grief! You are right. I am glad we check each other. I picked up the revs for 285 X 30-19's. Thanks for finding this mistake; it might make some things more in agreement. And, I quess you do have a slight rear-end advantage ((714 / 707)3.38) = 3.41

Right, all of what you say above is true. Looks like I am going to be doing a bit of recalculation. The good news is that the spreadsheets I e-mailed and all of my prior calculations apply precisely to your car. Normally, I would charge for all that work. And, I am going to call Tesla--at least after Tue. Thanks again. Happy snow days, g-man.

Originally Posted by Znod' post='239229' date='Feb 12 2006, 10:59 PM

I don't have anything good yet, but I thought I mention one thing. I have always been reluctant to base other calculations on calculated values for tire circumferences For both of us, there are fairly large differences between the tire RPM per mile values. Why do you prefer to go with calculated circumfrences.

His is the calc. of your tire RPM given your circumference calculation:

g-man
25.9*pi=81.37
Tire RPM = 12*5280/81.37 = 779 (versus the manufacturer's value of 807)

And, here is mine:

Zman
25.68*pi = 80.709
Tire RPM = 12*5280/80.709 = 785 (versus the manufacturer's value of 814)