03 Video-AKA Moma's Boyz

http://www.wingardracing.com/misc/500-9-1-02.mpeg

Nice, sounds pretty good.
I read somewhere that those Gtech devices are 2-3 tenths off


LS

Well, one thing you must remember is the fact that a G-Tech will always show a higher MPH than you will get at the track. the 12.8 is probably fairly accurate though.

[quote:f74257d0fd="LS1JAY"]Well, one thing you must remember is the fact that a G-Tech will always show a higher MPH than you will get at the track. the 12.8 is probably fairly accurate though.[/quote:f74257d0fd]

ya gonna tell him why it does that though?

[quote:0d6487277d="John"][quote:0d6487277d="LS1JAY"]Well, one thing you must remember is the fact that a G-Tech will always show a higher MPH than you will get at the track. the 12.8 is probably fairly accurate though.[/quote:0d6487277d]

ya gonna tell him why it does that though?[/quote:0d6487277d]

Magic?

nah, I could look into it but Im too lazy to do it right now.

Enlighten us John..... :D

LS

I want to see a video past 125 mph, just to see how much they have
after that. I took my car up to 155 with no problem-pushing 4500rpm.
If one of those dicks try that shit on me they will have to do better than
121. :lol:

the G-tech gives you your actual speed at the end of a 1/4 mile distance. in an actual timed race, your speed is averaged over a measured distance at the end of teh track. so your average speed between teh two points is your final MPH on the timeslip but not the fastest you were running in teh race. the fastest you were running is measured at the finish line which is what the G-tech gives you.

G-techs are actually quite accurate. those who bash them for being inaccurate do not fully understand the math behind them. they are actually in accurate in some measurments but for the important stuff like measure G-forces, they do that very well. estimating power levels can get iffy on heavily modified cars because they don't accelerate like stock cars or turn like stock cars.

some people have gross inaccuracies wich can be directly attributable to not setting the G-tech up right.

while meters like the G-tech should not be relied on for actual numbers, they are accurate enough that your are going to be well within the ballpark of your realistic performance levels. within 2-5% and thats pretty accurate for a gyroscope mounted to your windsheild.

for a gryroscope to have the greatest accuracy, it needs to be mounted directly at the vehicle's center of gravity which will coincide, in most cases, with the roll center of the car. that basically puts it in a neutral position where it does not have to correct for G-forces being enacted upon it through the range of the movement of the car.

Cool, so instead of it being mounted on the windshield.
Would it be better if it was mounted somewhere like, say on the
floor on the driveshaft hump?

LS

Technically, it's not using gyros, it's solid state accelerometers. The G-Tech Pro measures acceleration along a single axis, thus you have to turn it sideways to measure lateral G's (a new $250 Race version uses 4 accelerometers and doesn't have to be moved). The unit has to be perfectly flat in relation to the road as well, it doesn't work too well on hills...

[quote:d0735ca9be="John"][quote:d0735ca9be="LS1JAY"]Well, one thing you must remember is the fact that a G-Tech will always show a higher MPH than you will get at the track. the 12.8 is probably fairly accurate though.[/quote:d0735ca9be]

ya gonna tell him why it does that though?[/quote:d0735ca9be]Well..... I would, but you already did!;)

they arent accurate, but they are consistent .

Evil ran his at the track and it showed 2 or 3 tenths fast . He just brought that back up a few weeks back.