bigtom

Has any one used one of the Peformance meters? do they work?
Would you recomend them?

http://www.autometer.com/media_popup...ommercial&id=1

the auto meter one fits in a guage pod!

http://www.gtechpro.com/mov-lg.html

bigtom

Apparently these things give you 0-60 times, 1/4 mile times, 60-0 distances, horsepower readouts! the list goes on....

wwmost

ive heard really good things about the gtech. my friend has one and it gets the 1/4 time pretty close. im not too sure about the hp cuz iono who it would measure that?? if i were to buy one i would def get the gtech

M1ke

ive heard the gtech's werent very accurate

GTboy98

i dont understand how they work??

Quicktime_GT

I have an older G tech, its black with a red display. The 1/4 times seem pretty accurate, they are always a little slower than what I run on the track, I just figure the track being much stickyer allowing more traction is where the quicker times come from. The G force meter is cool, gives you an idea of how hard your car pulls in different cars and at different RPM's, its like a high tech seat of the pants meter. As far as the horsepower meter, I think thats a joke, I just don't see that ever working.

Colorado_Mustang

I think it was Mustang & Fords that had a pretty good article about the different performance meters and how they work.

Basically, they are just an accelerometer that measures the amount of force your vehicle produces. Better meters will use 3 accel's (one in each axis) to more accurately calculate your forward velocity (countering the effect of your car's nose reaching for the sky).

HP can be estimated using a number of different formalus based on 1/4 mile times and the vehicles weight. There are variations on these formulas as they are based on actual 1/4 mile runs versus dyno data, but 2 reasonable examples are:

MPH = 225*(hp/weight)^1/3 and ET = 6.290*(weight/hp)^1/3

I'm sure someone has also created a formula based on 0-60 times that a performance meter could be programmed with as well.