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Discussion Starter · #1 ·
Has anyone had any experience with one of those performance meters that J.C. Whitney sells? They can supposedly measure horsepower, 0-60 and quarter mile times, and lateral acceleration. Are these effective, accurate, and worth the money (140$) ?
Thanks.
 

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NIce

> Has anyone had any experience with one of
> those performance meters that J.C. Whitney
> sells? They can supposedly measure
> horsepower, 0-60 and quarter mile times, and
> lateral acceleration. Are these effective,
> accurate, and worth the money (140$) ?
> Thanks.

I've been using one of these meters for a couple of weeks, while we have been building a new car, and I love it.

The device is advertised to be within 3 feet acurate of the 1/4 mile, and within a few tenths of your MPH.

They are a nice toy to have, if you are builiding motor and want to see your process, and progress compared.

Chris Behney
Redline Autosports
 

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Re: 1/4 mile accuracy ?

> I've been using one of these meters for a
> couple of weeks, while we have been building
> a new car, and I love it.

> The device is advertised to be within 3 feet
> acurate of the 1/4 mile, and within a few
> tenths of your MPH.

> They are a nice toy to have, if you are
> builiding motor and want to see your
> process, and progress compared.

> Chris Behney
> Redline Autosports

Chris,

What happens if you have wheel spin on your lauch? Or does it not measure the 1/4 mile distance from your tire revolutions?

Just curious,

Matt
 

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Re: 1/4 mile accuracy ?

> Chris,

> What happens if you have wheel spin on your
> lauch? Or does it not measure the 1/4 mile
> distance from your tire revolutions?

> Just curious,

> Matt
I have of this thing to and love it.The G-tech measures g forces so spinning will not effect the measurements.It just sticks to your windsheild and plugs into your lighter outlet
 

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Re: Wow! How? Now brown cow.

> I have of this thing to and love it.The
> G-tech measures g forces so spinning will
> not effect the measurements.It just sticks
> to your windsheild and plugs into your
> lighter outlet

Amazing. So it can tell you traveled a 1/4 mile by meausring G-Force? Is there a web site? Or do you have a one paragraph explanation in non-rocket science symantics? I never would've thought that G-Force would be a constant of distance traveled over a certain time. I don't know if I said that right but I know what I meant. But now that I've thought it, and written it, it kinda makes sense. If this is the answer, forget the question. Now I'm becoming befuddled by unclear ideas of what I was mixed up about.

Gotta go get a tylenol.

Matt
 

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Re: Wow! How? Now brown cow.

x=x0+v0t-1/2at*t. G force is acceleration devided by the acceleration of gravity. So, if you know how fast it is going initially, zero, it can measure accel. using an accelerometer, and can measure time, thus computing distance, speed, change in speed(used to calculate hp, accel again). It is all VERY simpler with two or three cheap devices. Understand? If not, I will say more later. I have to go.
Joshua L.
 

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Re: Let's hook one up to a cow.

> x=x0+v0t-1/2at*t. G force is acceleration
> devided by the acceleration of gravity. So,
> if you know how fast it is going initially,
> zero, it can measure accel. using an
> accelerometer, and can measure time, thus
> computing distance, speed, change in
> speed(used to calculate hp, accel again).

> It is all VERY simpler with two or three cheap
> devices.

Yea, like a speedometer, stopwatch, and a fast cow. I mean car.

>Understand?

Uh huh, it's only been about 15 years since I had physical science 101 in college. We talked about accelleration. I remember thinking, Wow, so when you're stopping, you're really accellerating. It was a very novel idea for me.

> If not, I will say more later.

Great, just don't use those equations. kidding.... Thanks for the explanation. That's what I was saying in my post, anyway. You just didn't understand my equation, it was words instead of numbers. HA HA.

Matt

PS. There really are some very smart people out there to think up these things-- and whitening toothpaste. It's refreshing, isn't it?
 

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Re: Let's hook one up to a cow.

> Yea, like a speedometer, stopwatch, and a
> fast cow. I mean car.

> Uh huh, it's only been about 15 years since
> I had physical science 101 in college. We
> talked about accelleration. I remember
> thinking, Wow, so when you're
> stopping, you're really accellerating.
> It was a very novel idea for me.

> Great, just don't use those equations.
> kidding.... Thanks for the explanation.
> That's what I was saying in my post, anyway.
> You just didn't understand my equation, it
> was words instead of numbers. HA HA.

> Matt

> PS. There really are some very smart people
> out there to think up these things-- and
> whitening toothpaste. It's refreshing, isn't
> it?
 

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Re: Let's hook one up to a cow.

Wow, it's cool to actually have intelligent people posting on this site - anyone ever visit any of the others? It's sad, people just rag on each other and post prejudice comments etc...

Anyways, look in a Physics book uner kinematics or any Calculus text under integration and you will get more information that you ever wanted. Math is pretty cool stuff eh?

> Yea, like a speedometer, stopwatch, and a
> fast cow. I mean car.

> Uh huh, it's only been about 15 years since
> I had physical science 101 in college. We
> talked about accelleration. I remember
> thinking, Wow, so when you're
> stopping, you're really accellerating.
> It was a very novel idea for me.

> Great, just don't use those equations.
> kidding.... Thanks for the explanation.
> That's what I was saying in my post, anyway.
> You just didn't understand my equation, it
> was words instead of numbers. HA HA.

> Matt

> PS. There really are some very smart people
> out there to think up these things-- and
> whitening toothpaste. It's refreshing, isn't
> it?
 
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