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03-31-2006, 05:29 PM

#401

grogan545

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Quote:

Originally Posted by Znod' post='263034' date='Mar 31 2006, 11:40 AM

Hi g-man. I added averages for your data on the other thread. Also, check out the footnote to my adjusted data showing the differences in 25%, 42%, and 100% weather adjustment. Would you mind summarizing all your raw data for the three passes that I have posted on the other thread. You don't have to repeat the weather data--just the date and all the raw data (e.g., 60' time, 1/8 mile. 0 to 60, etc.) that your are interested in. I would like to set up a spreadsheet for you. And, I am too tired right now, from dealing with masses of data, many posts, etc., to go back and find it all. Once enough data are accumulated for you I can start calculating regression coefficients for your data. Then, I'll be able to post more complete data for you on the other thread, and we can compare the regression coefficients.

Here is the data you requested Zman.I can't find the date for run #3 but I do have the data.
...........run 1.......................run 2..................run 3
..........3-15-06................3-27-06...................?
1/4... 13.35/104.65....13.42/105.5...............13.39/105.5
1000'.....11.20....................11.19.......... .......11.27
1/8....8.65/82.4..........8.69/82.7...................8.72/82.6
330'.......5.62..................5.65............. .........5.70
60'.........1.93..................1.95............ ..........1.95
0-60.......4.90..................4.97............... .......5.00
temp......41F....................52F.............. .........38F
dew........18F....................19F............. ..........17F
Bar........29.80.................30.18............ ........30.09
alt..........400'...................400'.......... ............400'
humidty..42%..................24%................. .......?
I think I have the correct 3 runs.Let me know if you need more.

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03-31-2006, 07:04 PM

#402

znod

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Quote:

Originally Posted by grogan545' post='263225' date='Mar 31 2006, 09:29 PM

Excellent. Thanks. And, yes, I'll let you know.

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03-31-2006, 08:41 PM

#403

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Originally Posted by Znod' post='263180' date='Mar 31 2006, 06:14 PM

Hi All:

What do you make of the data given below? Using the columns, notice that my weighted average RWHP values oscillate, on averge, as density altitude increases. Ignore, for now, the weighted average torque values to avoid minor confusion. I have not yet figured out what might cause this pattern.

The pattern implies that adjusting for more weather, say 42%, would be more appropriate some of the time, while adjusting for less weather, say 25%, would be more appropriate some of the time, etc., etc. Ultimately, the implication is that more and more weather adjustment should be made over the downward oscillations and vice versa. Thoughts please???

with what is going on?--why the pattern exists, etc.?

Col. 1 = Pass Number
Col. 2 = Density Altitude
Col. 3 = RWHP
Col. 4 = RWTQ
Col. 5 = 25% Weather/500' Altitude 1/4 ET's
Col. 6 = Unadjusted 1/4 ET's
Col. 7 = Weighted Average RWHP (5 RWHP values at a time)
Col. 8 = Weighted Average RWTQ (5 RWTQ values at a time)
Col. 8 = Selected Density Altitude Values from Col. 2

.1.........2............3..........4...........5.. ..........6............7.........8.........9
26...0787.90...244.1...251.4...13.459...13.594
27...0787.90...240.6...248.3...13.556...13.693
28...0787.90...240.6...248.3...13.525...13.661
44...0801.30...244.9...252.1...13.449...13.635
45...0801.30...249.2...253.1...13.484...13.620...243.9...250.6...787.9
46...0943.10...234.2...244.2...13.606...13.750...2 41.9...248.5
18...0943.10...238.9...244.1...13.650...13.794...2 41.5...247.7
20...0943.10...240.9...247.1...13.572...13.716...2 40.7...246.7
21...0977.80...234.6...243.8...13.627...13.772...2 37.8...244.8
22...0977.80...237.4...245.0...13.643...13.789...237.2...244.8...977.8
23...0977.80...236.6...244.2...13.658...13.804...2 37.7...244.8
51...1102.10...243.7...249.4...13.512...13.662...2 38.6...245.9
52...1102.10...249.4...235.4...13.540...13.691...2 40.3...243.6
13...1223.20...241.4...247.5...13.504...13.659...241.7...244.3...1223.2
14...1223.20...236.5...244.5...13.617...13.774...2 41.5...244.2
15...1223.20...240.9...247.1...13.575...13.732...2 42.4...244.8
16...1239.00...236.2...244.1...13.614...13.772...2 40.9...243.7
40...1415.40...243.6...248.7...13.529...13.694...2 39.7...246.4
41...1415.40...241.0...247.2...13.537...13.702...2 39.6...246.3
25...1509.30...233.7...240.0...13.632...13.802...2 39.1...245.4
29...1516.00...235.0...241.7...13.602...13.772...237.9...244.3...1516.0
30...1516.00...241.2...246.7...13.540...13.709...2 38.9...244.9
31...1516.00...243.2...246.0...13.518...13.687...2 38.8...244.3
49...1554.40...238.9...245.3...13.579...13.751...2 38.4...243.9
50...1554.40...240.2...233.3...13.574...13.746...2 39.7...242.6
32...1695.00...239.4...245.4...13.527...13.706...240.6...243.3...1695.0
33...1695.00...234.7...241.1...13.590...13.770...2 39.3...242.2
36...1722.40...239.5...244.9...13.517...13.695...2 38.5...242.0
37...1722.40...239.2...244.0...13.574...13.753...2 38.6...241.7
42...1763.50...235.9...244.2...13.597...13.779...237.7...243.9...1763.5
43...1763.50...239.4...246.0...13.477...13.729...2 37.7...244.0
34...1765.00...239.4...245.8...13.519...13.699...2 38.7...245.0
35...1765.00...242.5...247.4...13.562...13.743...2 39.3...245.5
48...1771.50...240.7...235.1...13.464...13.701...2 39.6...243.7
54...1839.20...238.0...246.0...13.569...13.754...240.0...244.1...1839.2
47...2085.60...239.4...245.9...13.572...13.768...2 40.0...244.0
38...2151.30...236.7...242.4...13.557...13.755...2 39.5...243.4
39...2151.30...239.0...242.6...13.529...13.807...2 38.8...242.4
53...3384.90...234.5...240.5...13.613...13.869...237.5...243.5...3384.9

Av...1422.90...239.6...244.9...13.560...13.732

Av = Average

Another way to look at the above data is to look simply at the average RWHP value for each density altitude. The resulting picture still is cloudy with confusing ups and downs in the RWHP averages as density altitude increases. Looking at the starting RWHP average of 241.8 and the ending value (ignoring the very final (new) one resulting from an extreme density altitude) we get an "average" RWHP decrease of only 241.8 - 237.9 = 3.9 RWHP--which ultimately, given a few other not-mentioned considerations, suggests use of the 25% weather adjustment. But, again, the undulations suggest that using various weather adjustment %'s, depending on the relative lowness or highness of the RWHP value achieved, may be the more appropriate approach. Or, could all of my data, together, imply that we should be doing no weather adjustments? Thoughts???

Density.........Average
Altitude...........RWHP
0787.90
0787.90
0787.90..........241.8
0801.30
0801.30
0801.30..........244.9
0943.10
0943.10
0943.10..........238.0
0977.80
0977.80
0977.80..........236.2
1102.10
1102.10..........246.6
1223.20
1223.20
1223.20..........239.6
1239.00..........236.2
1415.40
1415.40..........242.3
1509.30..........233.7
1516.00
1516.00
1516.00..........239.8
1554.40
1554.40..........239.6
1695.00
1695.00..........237.1
1722.40
1722.40..........239.4
1763.50
1763.50..........237.7
1765.00
1765.00..........241.0
1771.50..........240.7
1839.20..........238.0
2085.60..........239.4
2151.30
2151.30..........237.9
3384.90..........234.5

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04-01-2006, 06:12 PM

#404

grogan545

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Quote:

Originally Posted by Znod' post='263180' date='Mar 31 2006, 06:14 PM

I see what you mean Zman.It is a mystery for sure.I don't know how our meters calculate HP.I suspect it has to do with acceleration rate.This would make it independent of factors such as wheelspin,poor start,slow shifts.You would think that the higher altitude equivilent would always give the lower RWHP number,but your data shows this is not true.The variations in et can be explained by the factors I mentioned above.What would be of interest is the speeds at the end of the 1/4 on all these runs.I would like to see if the variations in speed follow the variations in RWHP.Speed at the end of a 1/4 is a better indicator of HP than et.It still wouldn't tell us why the RWHP doesn't always follow the equivilent altitude,but it would be of interest to see if the speed at the 1/4 more closely follows the RWHP or the altitude.

As for wether we should do any weather corrections I am not sure at this time.That is why I intend to do more runs under various weather conditions.I found the data on a run I made last may 2005 that I ignored because it seemed too good.I don't have the weather data but I know it was about 60F.I don't have a clue on the other factors but take a look at the times.
0-10...... .27
0-20....... .90
0-30....... 1.60
0-40....... 2.70
0-50....... 3.70
0-60....... 4.83
0-70....... 6.40
60'......... 1.92
330'....... 5.63
I didn't go beyond 70 mph so I don,t have 1/8 or 1/4 info.I have a vague memory of having not turned my DTC/DTS contols off on this run which is now my standard method.I know the weather conditions at this time are typically about "standard" or slightly worse.This would indicate that unless it gets very hot and humid with a low barometer reading,my car doesn't seem to care about the weather.

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04-01-2006, 09:32 PM

#405

znod

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Quote:

Originally Posted by grogan545' post='263545' date='Apr 1 2006, 10:12 PM

This would indicate that unless it gets very hot and humid with a low barometer reading,my car doesn't seem to care about the weather.

I see what you mean about your car not caring about the weather unless .... And, you are right. We should be looking at 1/4 speed as perhaps the best indicator of RWHP. I had spaced out the use of 1/4 speed in this context. So, here we go. I have provided comments below the correlations.

(1).............(2)..................(3).......... ......(4)................(5)................(6)... ...............(7)

.................................................. .............Per Individual Density Altitude--Col. 7)
.................................................. ..............................Avg................. Avg
Test..Density Altitude....RWHP........1/4 Speed.......RWHP.........1/4 Speed....Density Altitude
26..........0787.90..........244.1..........103.57 0
27..........0787.90..........240.6..........103.16 0
28..........0787.90..........240.6..........103.23 0..........241.8..........103.320..........787.90
44..........0801.30..........244.9..........103.71 0
45..........0801.30..........249.2..........104.15 0
46..........0801.30..........240.5..........102.80 0..........244.9..........103.553..........801.30
17..........0943.10..........234.2..........102.23 0
18..........0943.10..........238.9..........102.54 0
20..........0943.10..........240.9..........102.76 0..........238.0..........102.510..........943.10
21..........0977.80..........234.6..........101.79 0
22..........0977.80..........237.4..........102.38 0
23..........0977.80..........236.6..........102.30 0..........236.2..........102.157..........977.80
51..........1102.10..........243.7..........103.78 0
52..........1102.10..........249.4..........103.38 0..........246.6..........103.580..........1102.10
13..........1223.20..........241.4..........102.23 0
14..........1223.20..........236.5..........103.14 0
15..........1223.20..........240.9..........102.43 0..........239.6..........102.600..........1223.20
16..........1239.00..........236.2..........102.35 0..........236.2..........102.350..........1239.00
40..........1415.40..........243.6..........103.44 0
41..........1415.40..........241.0..........103.09 0..........242.3..........103.265..........1415.40
25..........1509.30..........233.7..........101.91 0..........233.7..........101.910..........1509.30
29..........1516.00..........235.0..........102.26 0
30..........1516.00..........241.2..........103.23 0
31..........1516.00..........243.2..........103.18 0..........239.8..........102.890..........1516.00
49..........1554.40..........238.9..........103.14 0
50..........1554.40..........240.2..........103.33 0..........239.6..........103.235..........1554.40
32..........1695.00..........239.4..........102.97 0
33..........1695.00..........234.7..........102.35 0..........237.1..........102.660..........1695.00
36..........1722.40..........239.5..........103.02 0
37..........1722.40..........239.2..........102.76 0..........239.4..........102.890..........1722.40
42..........1763.50..........235.9..........102.45 0
43..........1763.50..........239.4..........102.83 0..........237.7..........102.640..........1763.50
34..........1765.00..........239.4..........102.94 0
35..........1765.00..........242.5..........103.04 0..........241.0..........102.990..........1765.00
48..........1771.50..........240.7..........103.50 0..........240.7..........103.500..........1771.50
54..........1839.20..........238.0..........103.14 0..........238.0..........103.140..........1839.20
47..........2085.60..........239.4..........102.87 0..........239.4..........102.870..........2085.60
38..........2151.30..........236.7..........102.52 0
39..........2151.30..........239.0..........102.59 0..........237.9..........102.555..........2151.30
53..........3384.90..........234.5..........102.51 0..........234.5..........102.510..........3384.90

Avg..........1422.9..........239.6..........102.87 5

(a) Correlation--RWHP and 1/4 Speed...................Columns 3 and 4......0.804133638
(b) Correlation--RWHP and Density Altitude...........Columns 3 and 2.....-0.353813267
? Correlation--1/4 Speed and Density Altitude.....Columns 4 and 2.....-0.173737876
(d) Correlation--RWHP and Test............................Columns 3 and 1......0.325827751
(e) Correlation--1/4 Speed and Test......................Columns 4 and 1......0.528148382
(f) Correlation--RWHP and 1/4 Speed....................Columns 5 and 6......0.875257808
(g) Correlation--RWHP and Density Altitude............Columns 5 and 7.....-0.454187154
(h) Correlation--1/4 Speed and Density Altitude......Columns 6 and 7.....-0.189049881
(i) Correlation--RWHP and Test.............................Columns 5 and 1......0.331606937
(j) Correlation--1/4 Speed and Test.......................Columns 6 and 1......0.606677621
(k) Correlation--Test and Density Altitude...............Columns 1 and 4......0.443266451

Correlations (a) through (e) are more pertinent because they are related to each individual RWHP and 1/4 speed value rather than averages of such values given density altitude. Focusing on these correlations:

Correlation (a) seems natural--a high positive correlation between the two measures of HP--RWHP and 1/4 speed.

Correlations (b) and ? are somewhat expected. They reveal a tendency for negative correlation of HP and density altitude. The negative correlation is not large for the possibly better measure of HP--1/4 speed. Still as density altitude increases and, thus, weather befores more and more unfavorable in comparison to standard, it appears that HP, however measured, tends to decrease.

Correlations (d) and (e) reveal a positive correlation between HP and test (i.e., the passage of time). In sum, they suggest that my car has a tendency to gain HP over time. In this regard, correlation (e) is the most important since it deals with the possibly better measure of HP--1/4 time. The positive correlation could be the effect of learning or being "forced" to perform (as suggested by gragan545 below).

From an overall perspective, my view is that the tendencies mentioned above are at least partialy offsetting. In other words, the tendency of my car to gain HP over time tends to be at least partially offset by its tendency to lose HP as density altitude increases. But, regardless, the negative correlation between HP and density altitude suggests that a slight weather correction is appropriate--say 25% as I concluded before. In any event, I think that using 25% weather is a good idea, for my car at least, because doing so produces more conservative results than using 0% weather adjustment.

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04-02-2006, 09:19 AM

#406

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Quote:

Originally Posted by Znod' post='263581' date='Apr 2 2006, 01:32 AM

I see what you mean about your car not caring about the weather unless .... And, you are right. We should be looking at 1/4 speed as perhaps the best indicator of RWHP. I had spaced out the use of 1/4 speed in this context. So, here we go. I have provided comments below the correlations.

(1).............(2)..................(3).......... ......(4)................(5)................(6)... ...............(7)

.................................................. .............Per Individual Density Altitude--Col. 7)
.................................................. ..............................Avg................. Avg
Test..Density Altitude....RWHP........1/4 Speed.......RWHP.........1/4 Speed....Density Altitude
26..........0787.90..........244.1..........103.57 0
27..........0787.90..........240.6..........103.16 0
28..........0787.90..........240.6..........103.23 0..........241.8..........103.320..........787.90
44..........0801.30..........244.9..........103.71 0
45..........0801.30..........249.2..........104.15 0
46..........0801.30..........240.5..........102.80 0..........244.9..........103.553..........801.30
17..........0943.10..........234.2..........102.23 0
18..........0943.10..........238.9..........102.54 0
20..........0943.10..........240.9..........102.76 0..........238.0..........102.510..........943.10
21..........0977.80..........234.6..........101.79 0
22..........0977.80..........237.4..........102.38 0
23..........0977.80..........236.6..........102.30 0..........236.2..........102.157..........977.80
51..........1102.10..........243.7..........103.78 0
52..........1102.10..........249.4..........103.38 0..........246.6..........103.580..........1102.10
13..........1223.20..........241.4..........102.23 0
14..........1223.20..........236.5..........103.14 0
15..........1223.20..........240.9..........102.43 0..........239.6..........102.600..........1223.20
16..........1239.00..........236.2..........102.35 0..........236.2..........102.350..........1239.00
40..........1415.40..........243.6..........103.44 0
41..........1415.40..........241.0..........103.09 0..........242.3..........103.265..........1415.40
25..........1509.30..........233.7..........101.91 0..........233.7..........101.910..........1509.30
29..........1516.00..........235.0..........102.26 0
30..........1516.00..........241.2..........103.23 0
31..........1516.00..........243.2..........103.18 0..........239.8..........102.890..........1516.00
49..........1554.40..........238.9..........103.14 0
50..........1554.40..........240.2..........103.33 0..........239.6..........103.235..........1554.40
32..........1695.00..........239.4..........102.97 0
33..........1695.00..........234.7..........102.35 0..........237.1..........102.660..........1695.00
36..........1722.40..........239.5..........103.02 0
37..........1722.40..........239.2..........102.76 0..........239.4..........102.890..........1722.40
42..........1763.50..........235.9..........102.45 0
43..........1763.50..........239.4..........102.83 0..........237.7..........102.640..........1763.50
34..........1765.00..........239.4..........102.94 0
35..........1765.00..........242.5..........103.04 0..........241.0..........102.990..........1765.00
48..........1771.50..........240.7..........103.50 0..........240.7..........103.500..........1771.50
54..........1839.20..........238.0..........103.14 0..........238.0..........103.140..........1839.20
47..........2085.60..........239.4..........102.87 0..........239.4..........102.870..........2085.60
38..........2151.30..........236.7..........102.52 0
39..........2151.30..........239.0..........102.59 0..........237.9..........102.555..........2151.30
53..........3384.90..........234.5..........102.51 0..........234.5..........102.510..........3384.90

Avg..........1422.9..........239.6..........102.87 5

(a) Correlation--RWHP and 1/4 Speed...................Columns 3 and 4......0.804133638
(b) Correlation--RWHP and Density Altitude...........Columns 3 and 2.....-0.353813267
? Correlation--1/4 Speed and Density Altitude.....Columns 4 and 2.....-0.173737876
(d) Correlation--RWHP and Test............................Columns 3 and 1......0.325827751
(e) Correlation--1/4 Speed and Test......................Columns 4 and 1......0.528148382
(f) Correlation--RWHP and 1/4 Speed....................Columns 5 and 6......0.875257808
(g) Correlation--RWHP and Density Altitude............Columns 5 and 7.....-0.454187154
(h) Correlation--1/4 Speed and Density Altitude......Columns 6 and 7.....-0.189049881
(i) Correlation--RWHP and Test.............................Columns 5 and 1......0.331606937
(j) Correlation--1/4 Speed and Test.......................Columns 6 and 1......0.606677621
(k) Correlation--Test and Density Altitude...............Columns 1 and 4......0.443266451

Correlations (a) through (e) are more pertinent because they are related to each individual RWHP and 1/4 speed value rather than averages of such values given density altitude. Focusing on these correlations:

Correlation (a) seems natural--a high positive correlation between the two measures of HP--RWHP and 1/4 speed.

Correlations (b) and ? are somewhat expected. There reveal a tendency for negative correlation of HP and density altitude. The negative correlation is not large for the possibly better measure of HP--1/4 speed.

Correlations (d) and (e) reveal a positive correlation between HP and test (i.e., the passage of time). In sumt hey suggest that my car is gaining HP over time. In this regard, correlation (e) is the most important since it deals with the possibly better measure of HP--1/4 time. The positive correlation could be the effect of learning. However, correlation (k) must be deal with. It implies positive correlation between test and density altitude--that HP is increasing over time because density altitude (i.e., worse than standard weather) is increasing over time. Consistently, my average density altitude/1/4 speed for my first 20 tests and last 20 tests are 1212.4/102.648 and 1633.4/103.103, respectively. So, is my car still learning, or is the small increase in HP the result of worsening weather conditions?

Whatever, my current view is the opposite of my prior one--that my HP was decreasing slightly with worsening weather conditions. I tend to think that the increase in HP is a function of learning since worsening weather conditions should not imply increases in HP (unless such results are the result of a minor dysfunction in BMW's engine management system--i.e., the engine could be overly detuned given improving weather conditions). In this regard, seven of my best eight 1/4 speeds occurred over my last 20 tests, and the realted density altitudes were consistent overall with better than standard weather conditions. They were 103.440/1414.4; 103.710/801.3; 104.15/801.3; 103.5/1771.5; 103.33/1554.4; 103.78/1102.1; and 103.38/1102.1--with only one value being above my actual altitude of 1600 (and, thus, implying worse than standard weather conditions).

So, what does all of the above imply ultimately. I think that it suggests that a slight weather correction is appropriate--say 25% as I concluded before. The reasoning is slightly different now. I suspect that if we could take the effect of learning out, then slight decreases in HP would become apparent given worsening weather conditions. Regardless, I think that using 25% weather is a good idea, for my car at least, because doing so produces more conservative results than using 0% weather adjustment. Also, it can't learn forever, I guess. Seriously, I think that its learning is bound to have come to an end at this point although I have no clear evidence directly supporting this conclusion.

Hi Zman .You certainly have done a lot of homework on the subject.I agree with your conclusion that HP & speed at the 1/4 seem to track more closely than the other comparisons.Also you may be correct that your car is getting faster over time.I am not sure that is due to learning.I think it may be due to a general loosening of the engine parts.I believe my car is running faster now than last year when I began testing.I have seen on average higher gross HP numbers on my GT2 than on my runs last year.I believe the highest HP last year was 356,I have seen 371 as recently as today(data to follow).I am sure there comes a point where engine wear will cause power to be reduced but who knows when this will occur.I know you had a glitch when you updated to 20.01,but maybe that has taken care of itself and you are now getting improvement by a general loosening of parts.It has always been a theory among hotrodders that the running your engine agressively would cause your car to develop more horsepower than someone who rarely uses full power in their car.

I made 1 run today with DTC off in D.I tried a run with DTC engaged but had a serious intervention which caused the car to bog,I aborted this run.On the run I completed I had serious wheelspin(note the poor 60' time).I still completed the run and was surprised at the results.
1/4...........13.38/106.30
1000'............11.26
1/8...........8.75/83.7
330'..............5.77
60'................2.08
0-60..............4.98
Peak HP.........371
temp..............54F
Dew...............34F
bar...............30.10
Hum..............39%
altitude.........400'
It is obvious that I lost more than .1 sec with my 60' time,but after it hooked up the data looks great.I posted my best 1/4 speed ever,and also a very good 1/8 speed.Whats really puzzeling is the weather conditions are not as favorable for performance as it was on my 3 best runs which I posted.The higher speeds at the 1/8 & 1/4 are not surprising.Wheelspin generally does give better 1/4 speeds,but worse et's.
As the weather changes here I have to modify my starting procedures.What works in cold weather doesn't necessarily work in warmer weather.

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04-02-2006, 09:39 AM

#407

znod

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Quote:

Originally Posted by grogan545' post='263718' date='Apr 2 2006, 12:19 PM

Your pass looks very good. You HP value is outstanding. I never got HP values close to this one from the GT2. Your car is a hecar. I'll add your pass to the data base, etc. pretty soon. I'll give you your adjusted values now.

Your results:
Air Temp 54 (?F)
Altimeter Setting 30.1 (in)
Dew Point 34 (?F)
Altitude 400 (Feet)
Density Altitude 52.1 (feet)

25% = 313.025

To sea level:

Your results:
Density Altitude 313.025 (feet)
Uncorrected ET 13.38 (sec)
Uncorrected MPH 106.30 (mph)
Corrected ET 13.336
Corrected MPH 106.658

To 500':

Your results:....................................Way to go. Both values are super. Yehaaa.
E.T. 13.336 (sec)
Trap Speed 106.658 (mph)
Measured DA 0 (feet)
Corrected to 500(feet) DA
Corrected ET 13.406 (sec)
Corrected Trap Speed 106.088 (mph)

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04-02-2006, 11:52 AM

#408

EBMCS03

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MAN we lose like almost 90 hp going to the wheels? how sad...

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04-02-2006, 11:56 AM

#409

znod

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Quote:

Originally Posted by EBMCS03' post='263750' date='Apr 2 2006, 02:52 PM

MAN we lose like almost 90 hp going to the wheels? how sad...

Hi Eric:

If you are looking at my HP values, then note that they allow for all possible losses, including wind resistance, rolling resistance, tranny, etc. Mine are much lower than with my GT2--which attempts to determine crank HP. Look at grogan545's 371 HP value in his last post.

He uses a GT2.

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04-02-2006, 06:12 PM

#410

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Quote:

Originally Posted by Znod' post='263721' date='Apr 2 2006, 12:39 PM

Thanks again Zman for the correction info.So far the weather doesn't appear to affect my performance unless it becomes extreme.Like -2500 altitude or + 2500 altitude.It seems that I can get consistant unadjusted times between13.36 to 13.45 for the 1/4 and 0-60 times between 4.90 & 5.00 under a variety of weather conditions.As long as it doesn't get very cold and dry,or hot and humid my times are relatively unaffected.

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