so i took my 88 lx 5 spd. 5.0 to get dyno'd for my quarter mile time and i found out some weird stuff. it is a stock mustang w/ 140k mi. w/ no mufflers/side pipes, underdrive crank, B&M short shifter, and cobra clutch. i wasnt expecting any crazy times, but i was hoping for 14 flat. my instructor did 2 launches on the dyno from a dead stop, he dropped the clutch @2500 rpm and floored it w/o powershifting and it ran a 19. 1st and 2nd gear dominated and 4th was great. but 3rd totally sucked ass. 1st and 2nd gears were high rpm and went by fast, but when he put it in 3rd, it sounded kinda like he put it in 4th, and he said that 3rd gear had extremely low power compared the others. they did a second launch powershifting, dropping the clutch @3000 and smoking the tires through all of 1st and like half of 2nd. the car shook as he floored it and shifted hauling ass. then when it reached 3rd it dogged and then picked back up in 4th. it ran an 18. when i bought the car it came w/ a 4 pt. roll cage, B&M shifter, clutch, dumps, and it had holes drilled where a tach pod would go on the dash. so obviously it was used somewhat for racing. my instructor asked if the car had nitrous installed, and i told him that i didnt know. so he said that the probable cause of this would be the computer had been modified and had a chip installed retarding timing in 3rd to prepare for nitrous. this makes sense, plus it is kinda obvious by seeing some duct tape on the computer. he also said that it pulls hard for stock and that he could probably get it into high 13s w/ a new 2nd gear synchro and a chip replacement. i then took the computer out and opened it up looking for some sort of aftermarket parts. i have it apart right now, but dont see anthing that looks aftermarket. has anybody ever heard of this? does anybody know where an aftermarket chip would go inside of the computer???? any pics or diagrams??? any help would ge great. thanks!