Performance Meter

[goof]

Anyone got a gadget like this one?

Performance Meter


The only thing G-Tech/Pro needs to connect to is a power source (cigarette lighter), that is it. Once plugged in and level, it can give you all sorts of useful data including:

* Instantaneous horsepower
* Peak horsepower
* Quarter mile time
* Quarter mile speed
* 0 to 60 time
* 60 to 0 braking distance
* Longitudinal G's
* Lateral G's
* Instantaneous G's
* Peak G's


Looks like very cool bling for inside the screen or a good tool for the racers. I'm told a friends brother has one so I'm trying hard to get a loan of it.

-goof

[Foofie Foofie]

Originally posted by goof@Apr 2 2005, 02:04 PM
Anyone got a gadget like this one?

[snapback]105662[/snapback]

I have and its not best used on bikes for a simple reason . They measure the power of a engine by the entire weight of the car/bike, and seeing how it pulls in G-force via dual accelerometers. Now this can throw the figues on such a short wheelbase item as a bike, coupled with non exact rider position, drag on the upper body and gusts of wind that can have a minor effect on the rear shock. As the rear shock compresses, the accelerating G's go up ... yet your not making power, or no more than before. What im saying is that you dont have a fixed drag co-eff on a bike unlike a car, and the wheelbase is doubled , meaning you have much less chance of inconsistant squat in the rear end of a car .

It will work .... but how well and linearly each time depends on mother nature. And as i say allways , its not about how much power you make, its about how consistant you can have it run after run after run while changing a mod .

A better program would be street dyno . It measures the signal off the coil and measures a "tick" each time a pulse is read. This feeds a signal o your laptop (in your backpack) that knows what the gear ratios are, what gear your in (you specify) the weight of the bike, fixed drag co-eff , final drive, ambient temp data etc ..... it says "to make a bike pull this many ticks from low (1000+rpm) to high (redline) with so much weight, with this gear and that ratio, in that temp and that drag co-eff etc - it has to make this much power, and here is the map" .

It draws a perfect map like a dynometer . Of course thats only power measurement .

[goof]

Originally posted by saf@Apr 2 2005, 02:35 PM
I have ......

[snapback]105669[/snapback]

Informative reply saf, thanks. The guy I mentioned who's got one is a car nut, not bikes, so that figures.

-goof

[Foofie Foofie]

BUT by all means Goof , try it . Do 5 power runs and compare the power ... see if it pulls power linearly within a hp or two each time .... if so thats 3/4 of the issue solved.

Them G-Tech's (first series) go for about $20usd on ebay .... for that, you cannot go wrong .

[MeLLe]

I have used one a few yrs back in my cage days. Hopefully they have come along a bit, as it wasn't always accurate, but a lot of fun playing with them.

[goof]

I was thinking even if you can't calibrate it for HP properly, the g forces would be fun around corners and such. Then I realised that's no good 'cause you wouldn't be able to keep it level. Still for $20 it could be a bit of fun. For timing a 1/4 mile a gizmo attached to the speedo cable sounds the go. Time x number of pulses from when you get the first one. I could probably program up a micro to do that. hmmmm.

-goof