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***OFFICIAL*** poast youíre Dragy street vids thread!!!

 
Old 05-02-2019, 10:44 AM
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Originally Posted by snake95 View Post
12.6 isn't bad for a modded LS1 dang!

no youíre full mod fox canít do that on the street!
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Old 05-02-2019, 10:47 AM
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Originally Posted by HioSSilver View Post
Be great for change comparisons.....which is really all i use a drag strip for.
yup itís a pretty sweet tool. Just like me
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Old 05-02-2019, 11:30 AM
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Originally Posted by SLOW SEDAN View Post
What are the reasons? I've seen numerous examples where its within .1 in the quarter mile and within 2MPH in the half mile of actual timing equipment. I agree its not a 100% replacement, but certainly close enough to have some fun in winter when track is closed or to know how a car performs that the owner doesn't want to take to the track for whatever reason.
As I said above, its great for a ballpark. The problem is that on other platforms people are using these things to replace drag strip times and claim "first to xx et/xxx mph".

Keeping this short, the issues are A) the GPS receiver has a 10Hz refresh rate...that is 10 times a second, so calculating times to .0x when you only refresh every .x is no bueno, and B) the inherent error in commercial grade GPS is ~5 meters. I've talked to multiple people who have one and they can run multiple passes back to back on multiple occasions and sometimes they line up and sometimes they dont. Shoot, being a tenth off a track time is awesome....just not when people are trying to claim records with it, which is the new craze. I've seen at least one instance of a platform claiming first in the 11's because their Dragy said they ran an 11.95. Sorry go to the track and back it up.

The new L5 band of GPS will give accuracy to less than 1ft and they already have 100 Hz GPS receiver's available but they have other issues (noise). Yes the current Dragy also has an accelerometer and timing, which also all have error, and again the sampling rate is too low to perform proper filtering and analytics on it to throw out outliers during a run. For reference, I designed and built a ruggedized data acquisition device that samples in the 10's of kilohertz so I have some clue about this despite what Hammer's 3rd grade posts would have you think
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Old 05-02-2019, 11:37 AM
  #24  
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Originally Posted by ddnspider View Post
As I said above, its great for a ballpark. The problem is that on other platforms people are using these things to replace drag strip times and claim "first to xx et/xxx mph".

Keeping this short, the issues are A) the GPS receiver has a 10Hz refresh rate...that is 10 times a second, so calculating times to .0x when you only refresh every .x is no bueno, and B) the inherent error in commercial grade GPS is ~5 meters. I've talked to multiple people who have one and they can run multiple passes back to back on multiple occasions and sometimes they line up and sometimes they dont. Shoot, being a tenth off a track time is awesome....just not when people are trying to claim records with it, which is the new craze. I've seen at least one instance of a platform claiming first in the 11's because their Dragy said they ran an 11.95. Sorry go to the track and back it up.

The new L5 band of GPS will give accuracy to less than 1ft and they already have 100 Hz GPS receiver's available but they have other issues (noise). Yes the current Dragy also has an accelerometer and timing, which also all have error, and again the sampling rate is too low to perform proper filtering and analytics on it to throw out outliers during a run. For reference, I designed and built a ruggedized data acquisition device that samples in the 10's of kilohertz so I have some clue about this despite what Hammer's 3rd grade posts would have you think
yet itís deadly accurate when tested against track timers so youíre to electronics what Al Gore is to climate science
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Old 05-02-2019, 11:56 AM
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Originally Posted by big hammer View Post
yet itís deadly accurate when tested against track timers so youíre to electronics what Al Gore is to climate science
Thanks for proving my point.
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Old 05-02-2019, 11:59 AM
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seems pretty cool. might have to pick one up. looks like its only 149 bucks?
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Old 05-02-2019, 12:06 PM
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Originally Posted by UltraZLS1 View Post
seems pretty cool. might have to pick one up. looks like its only 149 bucks?
yup then download the free app
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Old 05-02-2019, 12:07 PM
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Originally Posted by big hammer
no youíre full mod fox canít do that on the street!
Yes it would be much faster oops dang and pow!
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Old 05-02-2019, 12:08 PM
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Originally Posted by ddnspider View Post
As I said above, its great for a ballpark. The problem is that on other platforms people are using these things to replace drag strip times and claim "first to xx et/xxx mph".

Keeping this short, the issues are A) the GPS receiver has a 10Hz refresh rate...that is 10 times a second, so calculating times to .0x when you only refresh every .x is no bueno, and B) the inherent error in commercial grade GPS is ~5 meters. I've talked to multiple people who have one and they can run multiple passes back to back on multiple occasions and sometimes they line up and sometimes they dont. Shoot, being a tenth off a track time is awesome....just not when people are trying to claim records with it, which is the new craze. I've seen at least one instance of a platform claiming first in the 11's because their Dragy said they ran an 11.95. Sorry go to the track and back it up.

The new L5 band of GPS will give accuracy to less than 1ft and they already have 100 Hz GPS receiver's available but they have other issues (noise). Yes the current Dragy also has an accelerometer and timing, which also all have error, and again the sampling rate is too low to perform proper filtering and analytics on it to throw out outliers during a run. For reference, I designed and built a ruggedized data acquisition device that samples in the 10's of kilohertz so I have some clue about this despite what Hammer's 3rd grade posts would have you think
Ahh yes I agree with that, you can't claim a drag racing track record without a timeslip period! But I could see if both parties are using dragy, I suppose they could claim the "dragy record" for whatever that's worth. Really all the records themselves have gotten out of control, seems everyone in racing wants a participation trophy. Whatever happened to just racing to have fun? That's how I would classify this device, to have fun but not a replacement for a time slip. That said comparing timeslips from different tracks also varies, some have minor slope, some not exact length, others have different surfaces, some have inherently better DA by location, etc.. so really both sides have variables.
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Old 05-02-2019, 12:09 PM
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Originally Posted by big hammer View Post
yup then download the free app
will this work on a flip phone?
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Old 05-02-2019, 12:18 PM
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Originally Posted by SLOW SEDAN View Post
Ahh yes I agree with that, you can't claim a drag racing track record without a timeslip period! But I could see if both parties are using dragy, I suppose they could claim the "dragy record" for whatever that's worth. Really all the records themselves have gotten out of control, seems everyone in racing wants a participation trophy. Whatever happened to just racing to have fun? That's how I would classify this device, to have fun but not a replacement for a time slip.


Originally Posted by SLOW SEDAN View Post
That said comparing timeslips from different tracks also varies, some have minor slope, some not exact length, others have different surfaces, some have inherently better DA by location, etc.. so really both sides have variables.
Meh, its as close as you can get without trying to do DA correction on your timeslip....and much more repeatable than GPS.
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Old 05-02-2019, 12:19 PM
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Originally Posted by spikestang View Post
will this work on a flip phone?
only for 2v and 3v mustangs
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Old 05-02-2019, 12:24 PM
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Hams is funny. Trying to look special?? That is not a bone stock firehawk period. I drove my 01 SS for two years "stock" except for replacing the stamped steel suspension components. So my car wasn't really stock. Also with 25.6" rear tire, 3.42 gear, & 6k rpm it should pull to 130+ in fourth. Looks like you got them 4.11 gears rollin as only 118mph in fourth.
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Old 05-02-2019, 12:27 PM
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Originally Posted by SoFla01SSLookinstok View Post
Hams is funny. Trying to look special?? That is not a bone stock firehawk period. I drove my 01 SS for two years "stock" except for replacing the stamped steel suspension components. So my car wasn't really stock. Also with 25.6" rear tire, 3.42 gear, & 6k rpm it should pull to 130+ in fourth. Looks like you got them 4.11 gears rollin as only 118mph in fourth.
the cars name is Firestock are you dum
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Old 05-02-2019, 12:40 PM
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Originally Posted by big hammer View Post
only for 2v and 3v mustangs
shhhhh. Dont mention 2 valves
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Old 05-02-2019, 12:41 PM
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Originally Posted by Red2kZ28 View Post
12.6 @ 112 in a bone stock a LS1. Damn the MeTooCrew is gonna be SO upset over this. Nice run, Hammer.
Originally Posted by big hammer View Post
the cars name is Firestock are you dum
You forgot to call this guy dumb too.
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Old 05-02-2019, 12:45 PM
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Originally Posted by Turdinator View Post
You forgot to call this guy dumb too.
tpu canít tell me who to call dumb oops
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Old 05-02-2019, 12:49 PM
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it's really not that far off to say it's not useful, it's a tool, I use it for dial in traction for suspension and tire changes

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Old 05-02-2019, 12:57 PM
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It’s been tested to be more accurate than a Vbox
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Old 05-02-2019, 12:59 PM
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Originally Posted by big hammer View Post
the cars name is Firestock are you dum
You can call me dum all you want. Not that I understand this reply either. So if it's not bone stock, & just the name, why are you calling out "bone stock coyotards"?
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