Okay, I ran my car again today, this time with no stuff in the trunk, hardly any gas in the tank, and no 155 lb. friend. BUT I did have my 10" subs and amp in the trunk this time. The car was running better (sometimes it runs like crap sometimes good) then the first time I ran. I went:
15.92@87.2
16.19@86.9 (spun)
15.94@87.6

The only difference was the weight stuff and I got rid of the bald 235/55-16 for some 255/50-16 Kumhos (which I like alot).

Brady

 

i was thinking about getting one of those g tech things but i heard they werent very consistant...yours seems to be pretty good...does it tell how much HP you have?

 

it does tell HP, and the ET seems to be accurate, but this is my friends, if i was gonna buy one i would buy a http://www.tazzo.com instead