Acceleration Timers . Are They Accurate??

[Alwin Xavy]

Recently I tried testing the acceleration timer in my car and i got a 2.9 seconds 0 - 100 kmph. So I am confused to whether these things time properly or not. Mind that my car is not tuned it is bone stock.

So did anyone experience this ?

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[Q6543]

No they are not accurate at all, buy a dragy and get the phone app… they are perfectly accurate, mine is off by seconds

 

[Zig]

It may not be 100% accurate but it may give you a general idea or ballpark. 0 - 100 km is converted to 0 - 62 miles if I'm not mistaken. 2.9 sec is unusually faster than expected so maybe there's some sort of glitch or error. I would do repeated runs to see where the consistency and timing lies instead of relying on one timing for one single run. For example, if you do five separate back to back runs and you get anywhere between 5 seconds and 6 seconds - the average which would be 5.5 seconds... Then I guess that would be more legitimate. I would experiment and get some consistency going on all the variables such as your launch, the weather, the heat in the tires, and so forth. Ideally, I think your times should be within 1/10 or 2/10 of a second I would assume.

Uphill/downhill plays a part.

 

[Zig]

No they are not accurate at all, buy a dragy and get the phone app… they are perfectly accurate, mine is off by seconds

Your car or dragy is off by ‘seconds’, which oddly is the subject 🫣

 

[Alan Applegate]

Nothing is going to be as accurate as the clocks at your respective drag strip, which is a given.

The dash clock is driven by the associated CPU oscillator, and even if locked to a crystal standard it's probably no better than ± a few tenths of a second. Adding insult, we don't know how the timer is keyed, or stopped for that matter.

The Draggy use GPS coordinates, and their accuracy is partly determined by how many satellites it is locked onto, and the Draggy app doesn't tell you the number. A hand-held stop watch is probably as accurate, but it too relies on human reaction time.

You take your pick!

 

[gbadger]

Its not accurate at all. I do pulls in mine and it says 3.1. There is no way I am doing a 3.1 0-60 stock engine.

 

[AZ_Ryan]

Definitely not accurate.

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