ashman said:
I don't know much about electronics and computers and stuff so correct me if I am wrong...the GPS receiver in your cellphone is not as effective as those that one have on purpose-made GPS unit and definitely not as effective as units to the likes of a V-Box...
The receiver in your cellular phone/tablet suffers from a high satellite-to-device latency as its designed to not to consume battery life. In addition to this the the receiver shares "real-estate" with other components on your phone/tablet's motherboard hence reducing its antenna size and ultimately its accuracy is compromised.
Your application runs on top the phone's operating system and it being a phone shares the CPU time-slices with other software components whose treads cannot be set to "sleep" as they are considered to be core processes. I am not saying this is a factor of latency but it can be - one's phone/tablet is not a purpose made GPS tracking unit which a V-box is.
One's device can lock onto 50 satellites, but if there is this inherent latency on the device then it makes no difference. No software, regardless of cost would overcome this latency. A navigation (Tom-Tom/Garmin) unit may do a better job than your cell-phone in terms of accuracy but it too suffers some degree of latency.
To Phantoms words: "YOU DO NOT GET MORE ACCUTATE"
Sorry, I think you do. The most accurate method would be to establish a reference point on car and set that at the 0 metre mark and using a timer, measure how fast that reference point would get from the 0 mark to the 400 metre mark.
In terms of scaling, using one device to benchmark your cars may yield results based on some scale, it may happen to be an incorrect scale. Having one uncalibrated device yielding consistent results, can only be used to measure delta's and nothing more.
Sorry Mr. Phantom, I don't mean to discredit you, I once used similar applications to the one you have used so I know where you are coming from. I just feel I need to add my 2c and I must say some of the comments directed to your results seem to be immature and silly. You took the time to post them and I appreciate your contribution...Like I said earlier, I do not know much and I may be wrong - please correct me if I am.
Thank you.
I just want to know, did you guys ever do any logging and share it on the forum? I don't see how getting into this as you guys are is of any benefit whatsoever. As I have mentioned privately, this is information shared where Phantom has taken time out of his schedule to post up results he thought was relevant and interesting. He has done extensive testing as to where/what/how and this is all using his EXTENSIVE experience, which i'm even more sorry to say, NONE of you have. Full Bolts on cars are not drag cars, so I don't see how any of you have place to speak.
With regards to latency and GPS tracking, go buy a VBOX and run it against the software used and test its accuracy, then comment.
I dont see why such a big "hoo-haa" has to be made over these results or others. I am 100% sure that this gentleman whom you are questioning will outdrive any of you in your own cars any day of the week, which means you probably wont ever achieve his results in any case.
None of those who are questioning him have taken the time to ask the man himself, or take the time to meet him and see what he and his methodologies are. So yeah, you can type fast, datalog it and lets compare our typing speeds.
IF you dont believe the results, why not take it as entertainment then?
I mean we all watch Top Gear and we for a fact know that less and less of it is factual and more of it is entertainment these days
I'll be sure to join on the private testing. Also their airstrip is not to be laughed off. It's a good place to do measurements and testing as well. Grip is superior to tarlton.