RE: It's TAZZO Time!!!!!!!!
If you do a search for the post i made after i went to the drag strip in the fall, you can find some good comparisons of tazzo times to track times.
What i found is that at a normal ride height, the unit was very accurate. When i ran slammed, the tazzo consistently gave me a much higher time than the track did. This leads me to believe that the tazzo predicts a certain amount of squat (as the car tilts backward, the tazzo tilts backward, and the acceleration reading is higher, so it compensates for a predetermined amount of squat). When i slam the car, it doesn't squat, so that throws off the readings.
Since i modded my car over the winter, i tried to get some runs on my tazzo. My best was a 14.13 before i put the new tires on it (no tune yet, all kinds of traction problems). When i put the drag radials on the back, i lowered the car maybe an inch to compensate. Now my tazzo is telling me that i'm running 2.3-2.4 60' times with 4.10's, 3200 stall, and drag radials. My best since i put the drag radials on is now 14.5 something. Obviously that's wrong. But maybe the car isn't squatting like the tazzo thinks it is. But i just lowered it the tiniest amount, so i don't see how that could have thrown it off that much. The only other explanation i can think of, is that i'm exceeding the limit of the accelerometer on launch (it can only read up to 2 g's i believe). But i don't think i'm launching quite that hard.
My chip comes this week, and if the weather cooperates, i'm going to try to get to the drag strip this weekend. I'll still have to install the chip and pick up a tranny cooler, but those are both 15 minute jobs. I'll get back out there this weekend and see what it runs, and i'll take the tazzo with me for comparison again.