wondering who uses the gtechs to tune or get ballpark hp ideas from they're rides? got one when i had the bird but never used it gotta get it out on the rs anyone have any tips for using em or whatever to get the best results.

 

From what I've heard they're pretty accurate. I have one and it's a good tool to view some before/after results of mods. The 0-60 and 1/4 miles times are pretty accurate although I have heard that the trap speeds are usually off by 1-3mph(usually higher). Other than that they're an awesome tool. For your 0-60 all I can say is work on your launch. Try everything and go with what works best. For me personally I have found that if Ihold my left foot and the brake and bring the motor up to right before it feels like it's going to lurch forward and then give it as much gas as possible without getting spin. It's a bit of an art and is different for every car but as they say, practice makes perfect. Goodluck!

 

I use one for tuning. I use the 0-60 to check results of minor changes to see if I'm going the right direction.the hp mode seems to be afected by how firm your shift is(auto trans).

 

They're pretty good for tuning from what I've heard. I'm going to use one to tune my car this spring, as well as going to the track. The speed on it is usually a few mph off, like cas said, but that's becasue it measures your speed at the 1/4 mile mark rather than at the track where they use a 60' trap to measure speed (how ever long it takes you to travel the last 60', and then they convert that to mph).

 

That's how I planned to use mine. Common Spring!!

 

We don't need spring chuck. We need no snow and a big parking lot. Oh and your G-tech, ha.

 

you need to read the manual more closely. while you get a hp reading when you do a 1/4 mile run, it's not going to be accurate. to get a hp reading, you start out just like you would on a 1/4 mile run, but roll off gently from a standing start with absolutely no wheelspin. don't put much throttle in it through first and, as soon as you can, short shift it into second (this is the gear you'll measure your horesepower in), again with no wheelspin. once you're in second gear, roll the throttle on till it's floored and run it up to the redline, then let off the throttle and shift into third. continue rolling till the lights flash on the g-tech unit, indicating you've completed the run.

this is essentially the same procedure you use on a chassis dyno, except on the dyno you do it in a 1:1 gear. you do it in a lower gear on the gtech to minimize the effect of wind resistance.

i've found my g-tech to be fairly accurate, once it's set up properly.

the most important thing is to get the most correct weight possible for it. i weighed my car with me and a full tank of gas in it and saw the times get much more accurate.

you also have to be very careful when you calibrate the axis. i did mine on a table with a level. it helped a lot.

another place where you can make a difference is in the rollout setup. there's an extensive section on rollout in the manual. i set mine no higher than 2"