[Shotimes] Re: G-TECH/Pro fun

[Ron Porter]

IIRC, it is now an average over the last 60'(??), ending at the finish line.
FWIW, it used to be measured by two sets of lights, one 60' before the
finish line, the other 60' after, so speeds used to be higher. Don't
remember when they changed it, but it's been a number of years.

Key thing is that comparing G-Tech versus a real dragstrip is
apples-and-oranges. The only semblance of similarity is that people use a
"1/4 mile", which is a different measurement for each of the above. Each of
these measure very well within their own arena, not against each other.

Ron Porter


-----Original Message-----
From: shotimes-admin@autox.team.net [mailto:shotimes-admin@autox.team.net]
On Behalf Of Donald Mallinson
Sent: Friday, November 07, 2003 11:14 AM
To: shotimes@autox.team.net; v8sho@v8sho.com
Subject: [Shotimes] Re: G-TECH/Pro fun


In my testing of a G-tech, and the Vericom, these devices 
start timing as soon as the car moves, and drag strips 
always have SOME room between the timer and the car moving. 
  This means that G-tech/Vericom/Escort devices should have 
a slower time than at the drag strip.

My tests almost always had about 1/10 added to the drag 
strip time for the G-tech/Vericom (haven't tested the Escort 
unit yet).

As for MPH, since the timers make a calculation at the exact 
moment of the end of the run 1320' (based on G-forces/time) 
the MPH on a G-tech device was always higher by about 1-2 
mph than at the drag strip.  The drag strip takes an average 
of your mph over the last...what ron? 100 feet?  50 feet?.

Other than that the G-tech/Vericom was as consistent as the 
drag strip.

Now, on the street, you have wildly varying traction and a 
lot more elevation change than the drag strip unless you are 
very careful or know a surveyer!

Running both ways and averaging over the same section of 
road is the best way to eliminate elevation/wind from the 
equation.

Don Mallinson

Ron Porter wrote:
> Now, that gives you a decent baseline (assuming the same weather/road
> conditions) for future mods.
> 
> Don't even go NEAR comparing to 1/4 mile times at a track!!
> 
> Ron Porter
> 
> -----Original Message-----
> From: Steve Tatro [mailto:stevetatro@netzero.com] 
> Sent: Thursday, November 06, 2003 7:53 PM
> To: shotimes@autox.team.net; v8sho@v8sho.com
> Subject: G-TECH/Pro fun
> 
> 
> 
> Well, I bought a G-TECH/Pro from Mr. G-Tech (or whatever his ID is) on
eBay.
> $35 + $5 s/h, so I wasted a total of $40 ;^)
> 
> Hooked it up and went to find a flat road.  Not the easiest task!
> 
> Ended up doing 3 runs each way on the flattest portion I could find.
> 
> I threw out the best and the worst, averaged the other four, and here's
the
> results:
> 
> 0-60: 7.08
> 1/4 mile: 15.05/90.42
> 
> What surprised me the most is the difference I got on runs the same
> direction.  For example, the first 0-60 was 6.90, the second was 7.28,
etc.
> 
> I'm not sure if this points to the accuracy of the instrument or I just
> wasn't consistent with my launches (I have an ATX for what that's worth).
> 
> Heck, the one time I've been to a real 1/4-mile track I was very
consistent,
> both with my 60-foot times and my ET's.
> 
> Anyway, if anyone's looking to get one, this is probably the best deal
ever
> on a brand new one.  Don't expect a lot for your money, but if you've got
> $40 and nothing else to spend it on <g> this is a cute toy.
> 
> It'll be good for conversation with passengers if nothing else!
> 
> Steve Tatro
> '93 Red/Black with 172k miles
> Cincinnati, Ohio
> 
> 
> 
> .
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