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G-tech readings

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FRW Enthusiast

FRW

Posted
Posted

I have a question that I hope someone can supply some input on. I just recently did a couple of runs with my G-tech hooked up. The numbers I got do not seem to make sense. My averages were:

 

0-60 8.4 secs - This seems to be pretty close though I was hoping for better.

 

1/4 [email protected] - Here is where I have my problem. From what I have read from other instrumented tests the time of my run does not seem to correlate very well with my speed. Most of the testing I have seen where the speed is in this range the time is closer to 15 secs, whereas a mid 16 sec run usually gives you a high 70's to low 80's speed.

 

I am running an 03 Tahoe with the 5.3, 3.73, 4x4. Mods include AiRaid, JBA headers, Edelbrock catback, Granatelli MAF and 20 inch wheels and tires.

 

Any thoughts would be welcome.

Shaners Senior Enthusiast

Shaners

Posted
Posted

I don't know how a G-Tech records/measures the speed. Does it read off the Vehicle Speed Sensor? If it does have you recalibrated for your new tires and wheels?

 

Otherwise I can't answer your question... :confused:

Rotorwrench Enthusiast

Rotorwrench

Posted
Posted

G-Tech uses an accelorometer to measure acceration and it is very sensitive. If it is not mounted perfectly level the readings will be off. The bigest problem is finding a perfectly flat road to run on. Any hill, dip or slight incline will make the readings bogus. I used a G-Tech a few years ago and it was a neat toy, but when I used it at the drag strip to compare times and it was nowhere near close. I was 200 feet past the trap when it said the 1/4 was done and always gave a 10% to 15% higher speed than I accually had. G-Tech is a toy and a easy way to see if a mod made any improvement. To test for improvement you need to do a base line run on the most level road you can find. Then after you do a mod make a run on the same road and compare readings. Never use a G-Tech reading to make a bet.

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