I just purchased a Gtech Pro RR and tried it out for the first time today. My only mods are corsa track, K&N & VEC-2. The temp here is a little cool in NY. With several attempts I obtained 0-60 in 3.7, 3.92 & 4.2, however all with alot of wheel spin in 1st gear. These times cannot be true?? What is the weight I should program in the unit? I cannot seem to find the correct weight is it 3420 for an SRT-10??. Also, how accurate is the Gtech supposed to be? Help??