Did some Pocket Dyno (iPhone app) runs last night
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Did some Pocket Dyno (iPhone app) runs last night
Very, very consistent. These were done with traction control on (which means horrible 60' times in 53 degree weather launching on concrete, but I did roll the throttle 
).
Unit was carefully calibrated using L-shaped surface beforehand to ensure unit was perfectly level in both horizontal and vertical planes during calibration, and was wedged very carefully into cupholder with top leaning towards rear of vehicle, to ensure no movement during run.
Vehicle was in sport mode, suspension in comfort mode, vehicle raised, launched at idle speed, brake on, with release of brake and throttle roll-in.
Results:
12.83 @ 117.10
12.75 @ 117.25
12.76 @ 117.83
12.70 @ 118.12
I went to drag times and used the DA calculator. The best run corrects to 12.67 @ 118.54 mph. The 60' times were abysmal, as I noted, and account for the higher ET for these traps.
The traps are intriguing. Road & Track tested the Dynolicious iPhone ap vs a VBox, and the Dynolicious was consistently slower trap-wise by around 0.6-0.8 mph.
If this thing is accurate, this car has a very impressive trap speed. I'll have to get it to a strip one of these days and see how it measures up, but in addition to Road & Track & Car & Driver, these guys got very close results at E-town.
).Unit was carefully calibrated using L-shaped surface beforehand to ensure unit was perfectly level in both horizontal and vertical planes during calibration, and was wedged very carefully into cupholder with top leaning towards rear of vehicle, to ensure no movement during run.
Vehicle was in sport mode, suspension in comfort mode, vehicle raised, launched at idle speed, brake on, with release of brake and throttle roll-in.
Results:
12.83 @ 117.10
12.75 @ 117.25
12.76 @ 117.83
12.70 @ 118.12
I went to drag times and used the DA calculator. The best run corrects to 12.67 @ 118.54 mph. The 60' times were abysmal, as I noted, and account for the higher ET for these traps.
The traps are intriguing. Road & Track tested the Dynolicious iPhone ap vs a VBox, and the Dynolicious was consistently slower trap-wise by around 0.6-0.8 mph.
If this thing is accurate, this car has a very impressive trap speed. I'll have to get it to a strip one of these days and see how it measures up, but in addition to Road & Track & Car & Driver, these guys got very close results at E-town.
Last edited by Improviz; Jan 18, 2009 at 03:01 PM.
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2011 twin turboed prius
Very, very consistent. These were done with traction control on (which means horrible 60' times in 53 degree weather launching on concrete, but I did roll the throttle ).
Unit was carefully calibrated using L-shaped surface beforehand to ensure unit was perfectly level in both horizontal and vertical planes during calibration, and was wedged very carefully into cupholder with top leaning towards rear of vehicle, to ensure no movement during run.
Vehicle was in sport mode, suspension in comfort mode, vehicle raised, launched at idle speed, brake on, with release of brake and throttle roll-in.
Results:
12.83 @ 117.10
12.75 @ 117.25
12.76 @ 117.83
12.70 @ 118.12
I went to drag times and used the DA calculator. The best run corrects to 12.67 @ 118.54 mph. The 60' times were abysmal, as I noted, and account for the higher ET for these traps.
The traps are intriguing. Road & Track tested the Dynolicious iPhone ap vs a VBox, and the Dynolicious was consistently slower trap-wise by around 0.6-0.8 mph.
If this thing is accurate, this car has a very impressive trap speed. I'll have to get it to a strip one of these days and see how it measures up, but in addition to Road & Track & Car & Driver, these guys got very close results at E-town.
).Unit was carefully calibrated using L-shaped surface beforehand to ensure unit was perfectly level in both horizontal and vertical planes during calibration, and was wedged very carefully into cupholder with top leaning towards rear of vehicle, to ensure no movement during run.
Vehicle was in sport mode, suspension in comfort mode, vehicle raised, launched at idle speed, brake on, with release of brake and throttle roll-in.
Results:
12.83 @ 117.10
12.75 @ 117.25
12.76 @ 117.83
12.70 @ 118.12
I went to drag times and used the DA calculator. The best run corrects to 12.67 @ 118.54 mph. The 60' times were abysmal, as I noted, and account for the higher ET for these traps.
The traps are intriguing. Road & Track tested the Dynolicious iPhone ap vs a VBox, and the Dynolicious was consistently slower trap-wise by around 0.6-0.8 mph.
If this thing is accurate, this car has a very impressive trap speed. I'll have to get it to a strip one of these days and see how it measures up, but in addition to Road & Track & Car & Driver, these guys got very close results at E-town.
Your car should run low to mid 12's 113-116, man gotta love the Iphone.
Yeah there have been a couple CLS 55's in the low 12's stock, well at least one, you need to be the 2nd!! Rick is right we need more CLS participation. After all it is the BEST LOOKING MODEL
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Sounds spot on, your trap will drop and so will your ET
Your car should run low to mid 12's 113-116, man gotta love the Iphone.
Yeah there have been a couple CLS 55's in the low 12's stock, well at least one, you need to be the 2nd!! Rick is right we need more CLS participation. After all it is the BEST LOOKING MODEL
Your car should run low to mid 12's 113-116, man gotta love the Iphone.
Yeah there have been a couple CLS 55's in the low 12's stock, well at least one, you need to be the 2nd!! Rick is right we need more CLS participation. After all it is the BEST LOOKING MODEL
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Not sure about that; as noted, when R&T tested the Dynolicious ap vs. a V Box, the trap of the Dynolicious was actually *lower* than the VBox. The Dynolicious' trap speed came in at about 0.6-0.8 mph lower than the VBox's trap speed. Car & Driver didn't give traps, but also said it was about 0.3 seconds slower consistently than their VBox. And those guys w/the Mini at ETown also had mph slower w/the iPhone than w/the timeslip. It seems to return pretty good accuracy...
So that's the conundrum: if this thing is accurate, and given the repeatability of the numbers I'm pretty confident that I had it mounted securely and movement wasn't a factor, then this car is some kind of beast.
I'll get it down there one of these days and check it out, though, w/iPhone mounted up. I'm a bit skeptical, as that is one hot trap speed, but am also optimistic given the car w/which I calculated/mounted it and the results of the other mags. But until I get a timeslip in my hot little hands, I won't know for sure, which of course will keep that ol' conundrum a-rollin'!
I'm pretty sure I'll hit the trap, but track prep is gonna play a big role with that ET...MAN this thing is a bear to get outta the hole! OK, admittedly, on concrete in 53 degree temps isn't the greatest time to be trying it, but still, it's a monster to get outta the hole!
Amen to that!
So that's the conundrum: if this thing is accurate, and given the repeatability of the numbers I'm pretty confident that I had it mounted securely and movement wasn't a factor, then this car is some kind of beast.
I'll get it down there one of these days and check it out, though, w/iPhone mounted up. I'm a bit skeptical, as that is one hot trap speed, but am also optimistic given the car w/which I calculated/mounted it and the results of the other mags. But until I get a timeslip in my hot little hands, I won't know for sure, which of course will keep that ol' conundrum a-rollin'!
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Not sure about that; as noted, when R&T tested the Dynolicious ap vs. a V Box, the trap of the Dynolicious was actually *lower* than the VBox. The Dynolicious' trap speed came in at about 0.6-0.8 mph lower than the VBox's trap speed. Car & Driver didn't give traps, but also said it was about 0.3 seconds slower consistently than their VBox. And those guys w/the Mini at ETown also had mph slower w/the iPhone than w/the timeslip. It seems to return pretty good accuracy...
So that's the conundrum: if this thing is accurate, and given the repeatability of the numbers I'm pretty confident that I had it mounted securely and movement wasn't a factor, then this car is some kind of beast.
I'll get it down there one of these days and check it out, though, w/iPhone mounted up. I'm a bit skeptical, as that is one hot trap speed, but am also optimistic given the car w/which I calculated/mounted it and the results of the other mags. But until I get a timeslip in my hot little hands, I won't know for sure, which of course will keep that ol' conundrum a-rollin'!
I'm pretty sure I'll hit the trap, but track prep is gonna play a big role with that ET...MAN this thing is a bear to get outta the hole! OK, admittedly, on concrete in 53 degree temps isn't the greatest time to be trying it, but still, it's a monster to get outta the hole!
Amen to that!
So that's the conundrum: if this thing is accurate, and given the repeatability of the numbers I'm pretty confident that I had it mounted securely and movement wasn't a factor, then this car is some kind of beast.
I'll get it down there one of these days and check it out, though, w/iPhone mounted up. I'm a bit skeptical, as that is one hot trap speed, but am also optimistic given the car w/which I calculated/mounted it and the results of the other mags. But until I get a timeslip in my hot little hands, I won't know for sure, which of course will keep that ol' conundrum a-rollin'!
I'm pretty sure I'll hit the trap, but track prep is gonna play a big role with that ET...MAN this thing is a bear to get outta the hole! OK, admittedly, on concrete in 53 degree temps isn't the greatest time to be trying it, but still, it's a monster to get outta the hole!
Amen to that!
http://www.dragtimes.com/Mercedes-Be...ag-Racing.html
1/4 Mile
ET 1/4 Mile
MPH 1/8 Mile
ET 1/8 Mile
MPH 0-60 Foot
ET Car Year Driver
1) 11.838*^ 119.200 7.676 94.120 1.854 Mercedes-Benz CLS55 AMG RENNtech Stage 5 2006 RENNtech
2) 11.954*+ 120.800 7.826 95.730 1.961 Mercedes-Benz CLS55 AMG Kleemann 2006 MIlton Gil
3) 12.280*#+ 113.980 7.924 89.600 1.810 Mercedes-Benz CLS55 AMG 2006 Vten555
4) 12.381*# 115.340 8.112 90.130 2.074 Mercedes-Benz CLS55 AMG 2006 Nichol Sarini
5) 12.490# 113.210 8.087 1.992 Mercedes-Benz CLS55 AMG 2006 MAS
6) 12.509*# 111.990 8.070 87.650 1.912 Mercedes-Benz CLS55 AMG 2006 Siswati
7) 12.510*# 114.510 Mercedes-Benz CLS55 AMG 2006 NA
8) 12.800*+ 108.640 8.283 87.870 1.986 Mercedes-Benz CLS55 AMG 2006 Xavier Perez
9) 12.879# 109.930 8.344 85.990 2.048 Mercedes-Benz CLS55 AMG with 030 package 2006 Siswati
10) 12.956 107.500 8.352 85.270 1.951 Mercedes-Benz CLS55 AMG 2006 Tulsa Driver
11) 13.034* 105.640 8.396 83.450 1.973 Mercedes-Benz CLS55 AMG 2006 Xavier Perez
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Not sure about that; as noted, when R&T tested the Dynolicious ap vs. a V Box, the trap of the Dynolicious was actually *lower* than the VBox. The Dynolicious' trap speed came in at about 0.6-0.8 mph lower than the VBox's trap speed. Car & Driver didn't give traps, but also said it was about 0.3 seconds slower consistently than their VBox. And those guys w/the Mini at ETown also had mph slower w/the iPhone than w/the timeslip. It seems to return pretty good accuracy...
So that's the conundrum: if this thing is accurate, and given the repeatability of the numbers I'm pretty confident that I had it mounted securely and movement wasn't a factor, then this car is some kind of beast.
I'll get it down there one of these days and check it out, though, w/iPhone mounted up. I'm a bit skeptical, as that is one hot trap speed, but am also optimistic given the car w/which I calculated/mounted it and the results of the other mags. But until I get a timeslip in my hot little hands, I won't know for sure, which of course will keep that ol' conundrum a-rollin'!
I'm pretty sure I'll hit the trap, but track prep is gonna play a big role with that ET...MAN this thing is a bear to get outta the hole! OK, admittedly, on concrete in 53 degree temps isn't the greatest time to be trying it, but still, it's a monster to get outta the hole!
Amen to that!
So that's the conundrum: if this thing is accurate, and given the repeatability of the numbers I'm pretty confident that I had it mounted securely and movement wasn't a factor, then this car is some kind of beast.
I'll get it down there one of these days and check it out, though, w/iPhone mounted up. I'm a bit skeptical, as that is one hot trap speed, but am also optimistic given the car w/which I calculated/mounted it and the results of the other mags. But until I get a timeslip in my hot little hands, I won't know for sure, which of course will keep that ol' conundrum a-rollin'!
I'm pretty sure I'll hit the trap, but track prep is gonna play a big role with that ET...MAN this thing is a bear to get outta the hole! OK, admittedly, on concrete in 53 degree temps isn't the greatest time to be trying it, but still, it's a monster to get outta the hole!
Amen to that!
Tom
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We'll have to see once I can get it out to Ennis....I looked at their calendar for January and it's blank...there is a test and tune Sat. the 7th, but I prefer Friday eves as if you get there early you can get in several quick runs before it gets too crowded and then hang back and watch...
But I'll get down there soon enough, iPhone in hand, to see if this thing is as accurate as the good people at C&D and R&T said it was.
If so, I'll be wondering if this thing's been tweaked. 
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I think what Juicee was trying to say is that the 1/4 trap speed is the average speed over the final 60 (or 66) feet. A GPS based trap speed will be the actual (or as close to actual) speed crossing the 1/4 mile mark. JayCL600 used my pbox at MIR on his runs and the GPS trap speed was 1.29% to 1.39% (1.6-1.7mph) higher than the recorded trap speed from the track. So the dynolicious is still probably trapping lower than the track trap speed.
Tom
Tom
Since the R&T results came in with this device's trap showing up as a bit lower than VBox trap, though, I'd agree with you...I wonder, though, if the VBox units are programmed to emulate this final 60' averaging or are also providing absolute speed? Frankly, I think that the absolute speed is the way to go, although it's probably within a mph or so of the average at these velocities: 60' goes by pretty quick at 115+!
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Good question. I suspect they're probably pretty close accuracy-wise, given that they're using the same internal accelerometers and the equations aren't proprietary....in terms of features, it sounds like the Dynolicious is better. I may go ahead and pick it up before I go to the track and do a few runs w/each to see which has better results, although I'll have to come up with some method for mounting the unit in exactly the same spot to keep the test conditions as close as possible for each app.
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Thanks, Ricker....average was 114, even w/the somewhat slower than normal 112 factored in. Bear in mind that I ran in low 50's with a pretty favorable DA, so that probably helped.
We'll have to see once I can get it out to Ennis....I looked at their calendar for January and it's blank...there is a test and tune Sat. the 7th, but I prefer Friday eves as if you get there early you can get in several quick runs before it gets too crowded and then hang back and watch...
But I'll get down there soon enough, iPhone in hand, to see if this thing is as accurate as the good people at C&D and R&T said it was. If so, I'll be wondering if this thing's been tweaked.
We'll have to see once I can get it out to Ennis....I looked at their calendar for January and it's blank...there is a test and tune Sat. the 7th, but I prefer Friday eves as if you get there early you can get in several quick runs before it gets too crowded and then hang back and watch...
But I'll get down there soon enough, iPhone in hand, to see if this thing is as accurate as the good people at C&D and R&T said it was.
If so, I'll be wondering if this thing's been tweaked.
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Could be....I guess that the GPS units (or come to think of it, these things) could, in theory, be programmed to do that 60' average as well, but no way of knowing whether or not any of them have done it.
Since the R&T results came in with this device's trap showing up as a bit lower than VBox trap, though, I'd agree with you...I wonder, though, if the VBox units are programmed to emulate this final 60' averaging or are also providing absolute speed? Frankly, I think that the absolute speed is the way to go, although it's probably within a mph or so of the average at these velocities: 60' goes by pretty quick at 115+!
Since the R&T results came in with this device's trap showing up as a bit lower than VBox trap, though, I'd agree with you...I wonder, though, if the VBox units are programmed to emulate this final 60' averaging or are also providing absolute speed? Frankly, I think that the absolute speed is the way to go, although it's probably within a mph or so of the average at these velocities: 60' goes by pretty quick at 115+!
I agree 60' goes by quickly but when it comes to trap speed those 60' can have an impact on the outcome. An example:
Lets say your car at the 1260' mark is travelling 115mph..it is accelerating at a constant pace of .5mph per every 10'. So the car is going 115.5 @ 1270', 116 @ 1280', 116.5 @ 1290', 117 @ 1300', 117.5 @ 1310' and 118mph @ 1320'. The drag strip would average your trap out to 116.5mph. However your actual speed at the 1/4 mile mark was 118mph. That 60' averaging is costing you in this example 1.5mph and it only took you .351 seconds to cover that distance (If you had remained at a constant 115.5mph the time to cover the distance would have been .356). That is why people can't use car mag #'s to compare to track traps (not saying you did that).
It will be interesting to see how the dynolicious application holds up at the track.
Tom
Last edited by TMC M5; Jan 21, 2009 at 12:22 AM.
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You can manipulate the vbox/pbox data once it is recorded to get whatever time or speed measurement you are looking for. Edmunds Inside Line actually averages the last 60' to come up with their trap speed in their online road tests. I believe the rest of the car magazines use the vbox speed at 1320'. I believe most mags also weather correct the #'s.
I agree 60' goes by quickly but when it comes to trap speed those 60' can have an impact on the outcome. An example:
Lets say your car at the 1260' mark is travelling 115mph..it is accelerating at a constant pace of .5mph per every 10'. So the car is going 115.5 @ 1270', 116 @ 1280', 116.5 @ 1290', 117 @ 1300', 117.5 @ 1310' and 118mph @ 1320'. The drag strip would average your trap out to 116.5mph. However your actual speed at the 1/4 mile mark was 118mph. That 60' averaging is costing you in this example 1.5mph and it only took you .351 seconds to cover that distance (If you had remained at a constant 115.5mph the time to cover the distance would have been .356). That is why people can't use car mag #'s to compare to track traps (not saying you did that).
Lets say your car at the 1260' mark is travelling 115mph..it is accelerating at a constant pace of .5mph per every 10'. So the car is going 115.5 @ 1270', 116 @ 1280', 116.5 @ 1290', 117 @ 1300', 117.5 @ 1310' and 118mph @ 1320'. The drag strip would average your trap out to 116.5mph. However your actual speed at the 1/4 mile mark was 118mph. That 60' averaging is costing you in this example 1.5mph and it only took you .351 seconds to cover that distance (If you had remained at a constant 115.5mph the time to cover the distance would have been .356). That is why people can't use car mag #'s to compare to track traps (not saying you did that).
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60' averaging does suck...but if you are comparing it to other 1/4 mile traps done at a track, the other guys have the same disadvantage so it is an apples to apples comparison. It is only apples to oranges when comparing a GPS based trap to a track trap.
BTW your car looks great!
Tom
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Thanks! Still lovin' it!
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Amazing traps, if they can matched at the strip then you've got even more of a beast than you thought. By the way, those 030 wheels really make the car.
And don't you dare have the temerity to complain to me about 60' times
And don't you dare have the temerity to complain to me about 60' times
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Thanks! I agree, they really add to the overall look. And it's nice to have a true LSD on the thing as well, although it doesn't seem to make life any easier getting outta the hole!
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Yeah, I was really surprised...wish the damn iPhone had an altimeter so I could check to see if that stretch of road was truly flat!
Thanks! I agree, they really add to the overall look. And it's nice to have a true LSD on the thing as well, although it doesn't seem to make life any easier getting outta the hole!
Too late!
Thanks! I agree, they really add to the overall look. And it's nice to have a true LSD on the thing as well, although it doesn't seem to make life any easier getting outta the hole!
Too late!
great discussion and no ego, see this place aint so bad. Not even a dispute over my " Best looking model comment" LOL
Love yer CLS 55!!!
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