I previously posted some slow G timer times right after adding the Xcalibrator 2 SCT standard programming and adding my Borla. I don't know if the compter and so forth had to learn my driving habbits or what. Today I ran a 0-60 of 7.77, 1/8th of 10.15 and 1/4 of 15.77. and yeah, I know it's not the drag strip.

 

I'm going to make a few runs with the G-timer this week. All I have is magnaflow exhaust. No Xcal 2 yet. My truck feels VERY sluggish.

 

Unfortunately, those Gtech readings and 35c will buy you a newspaper.

I'd get it to a track and see some real times as those Gtechs have proven not very accurate. A friend of mine in his Eclipse bragged and bragged about how he could run low 13s on a Gtech, then took it to the track and couldnt get out of the 14s...with a turbo.

 

Yes, it can be that "fast." Like I have said in other threads I run side by side with Hemi 1500 Quad's with a setup just like yours. The Hemi's run in the high 15's in the 1/4 mile, so it seems pretty accurate.

 

HA! I wish I had two of these quotes, one to chit on and one to bury it with. Seriously. First, most of the electronic timers are VERY accurate. Second, he said he ran the first runs right after loading a tune. News tunes are slow as chit until a few drive cycles are completed. It gets faster after every cycle.

Mlaw - perfectly normal. Mine takes a full tank of gas and week to get to it's full potential. I should make some new runs this week with the cool weather, I bet I could match yours. My best times in the 70-80 degree range were 16 flat in the quarter.

 

So your claiming these devices are very accurate...ok...but I can tell you from EXPERIENCE(yes I actually drag race...at a real track) that I have seen them be very deceiving. BUT, if you feel that these are indeed accurate to lets say a tenth of a second, then take it to the track and see what she does. Timeslips dont lie. If you indeed can run what this Gtech says then I will admit its accurate, but until now I havent seen accuracy. Do you have any timeslips??

 

Get out there and post 'em up! As for accuracy, I was skeptical, so I did some research, including the article Dzervit posted and others in mags. Looks to me like the G Timer I am using, and te G Tech too as referenced above, are pretty day um accurate based on the tests. Anyway, can't wait to gt the rousch, headers and custom tune installed. I have the rousch now, but need to order the headers.

 

Oh, one other thing, the tracks can give you some s@#t numbers too. If they don't prep the track for the good citizens, anmd they usually don't spend much time on it for the 13 second plus crowd, tires go up in smoke etc.

 

All the quotes in the magazines are from units like the G-tech. I took my Veritech 200 to Pomona one weekend when the company I worked for had borrowed the strip, (helps to be a major sponsor...) and the times were actually more accurate in a technical sense. The machine doesn't know about red-lighting...
About a dozen guys played with it (new tech at the time, very expensive) and the consensus was that Road and Track, and Car and Driver were right to use them...

However, temps, altitude, etc. have got to be factored in. Something the track does for you.
I posted links for the altitude adjustment in one of these threads.
People forget that and can spend months trying to duplicate strip times in the High Desert... Can't be done, the strip is 2500 feet lower.
Chris

 

I'm not sure what Chris was trying to say in the previous post (so the following comment may not be pertinent). The GTech uses an inertia meter to measure the acceleration so weather/humidity/barometric pressure is irrelevant. There is some error depending how deep you stage, i would think though.

 

Correct. The Gtech SS starts timing when the truck starts moving. It doesn't rely on timing lights.

Read this. Car and Driver article

 

For those still confused, we had it on the windshield a much bigger box than the tiny G-tech, and were using it while running the quarter at the Pomona Fairgrounds drag strip.
Thus we could compare the results with real time tickets.
The V200 always gave you a result, but if you red lighted, the tower would not report your time.
That is not the case at all tracks, but it was the way they were doing it that day, thus the V200 was technically more accurate.

In an absolute sense, the difference we were getting from the Pomona tower after adjustments for altitude, were very very close.
And this is with the primitive technology of 1991.

We were interested because we were selling the product.
Also, because we were car guys anyway, even if we hadn't been in the parts business.
I still have the V200, but the little G-tech is so much smaller that I seldom dig out the old unit.

Hope that clears things up.
Chris

 

mlaw - did you ever swap tires/wheels or weigh them?

 

Not yet. I'll post when i get the chance to.

 

Which one do you think would get more respect, a Gtech reading or a timeslip from a well known track? Beside, not only is the track a safer place to run through the 1/4, you can also bracket race, grudge race, and just have a blast. All for around $15...and legally.