I have an 86 T/A WS6,305 tpi,700r4(has been rebuilt w/modded valve body and extra clutches/also 1800 stall conv.),2:77's,3" flowmaster exhaust,TB air foil....i just got a G-Tech/Pro for x-mas,,,i ran my car and got a E.T. of 15.7(ave. over three runs) and a speed of 90.4mph.,,,,does this sound right for my car,,,the car has 160,000 miles on it but well taken care of....thanx!

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86 Trans Am,T-Tops,305tpi,7r4(rebuilt w/shift improvments&added clutches,9-bolt(2:77:,flowmaster,3" cat back,,,otherwise completely stock

 

Probably. The G-tech is pretty accurate. You'll find the ET is very close and the MPH may be slightly higher on the G-tech. A 1/4 mile MPH is calculated from the time it takes to break the beams in the last 60' of the track. The G-tech is the true MPH at the end of the 1/4 mile.

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Stephen's racing page

87 IROC-Z Pro ET Bracket Race Car
383 stroker (carbed) with double hump cast iron heads and pump gas
454 Big Block buildup now in progress for the 2001 racing season

Best results before the 383 blew up
Best ET on a time slip: 11.857 altitude corrected to 11.163
Best MPH on a time slip: 117.87 altitude corrected to 126.10
Altitude corrected rear wheel HP based on power to weight ratio: 476.5
Best 60 foot: 1.662

Racing at 3500 feet elevation but most race days it's over 5000 feet density altitude!
Member of the Calgary Drag Racing Association

87 IROC bracket car, 91 454SS daily driver, 95 Homebuilt Harley