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X99snakeX · 05-28-2005, 08:29 PM

I have a 99 cobra that i ran two years ago at the track and best was a
13.25@108. That was with 3.27 gears and 245 street tires on the stock 17's and stock timing.
Since that run i have added a Steeda timing adjuster @16 degrees timing. An aluminum driveshaft, 03 cobra 31 spline half shafts,auburn pro series posi,
4.30 gears and MT 275/40 drag radials and mix 110/92 . I ran the car last night and could only muster a 13.3@103 for 5 consecutive runs??? i was running 15psi in the tires and getting 1.9 60 foots and before was only 2.1 60 fts but my trap speed has dropped a bunch? My top end just doesnt pull now.
could it be Air/Fuel problems? the car idles fine runs fine and no misses so im totally confused any information would be greatly appreciated... From what i have read online i should be running mid to high 12's and trapping around 110.

05-28-2005, 08:29 PM	#1 (permalink)
X99snakeX Junior Member Join Date: May 2005 Posts: 3	Went from 108 trap to 103????? I have a 99 cobra that i ran two years ago at the track and best was a 13.25@108. That was with 3.27 gears and 245 street tires on the stock 17's and stock timing. Since that run i have added a Steeda timing adjuster @16 degrees timing. An aluminum driveshaft, 03 cobra 31 spline half shafts,auburn pro series posi, 4.30 gears and MT 275/40 drag radials and mix 110/92 . I ran the car last night and could only muster a 13.3@103 for 5 consecutive runs??? i was running 15psi in the tires and getting 1.9 60 foots and before was only 2.1 60 fts but my trap speed has dropped a bunch? My top end just doesnt pull now. could it be Air/Fuel problems? the car idles fine runs fine and no misses so im totally confused any information would be greatly appreciated... From what i have read online i should be running mid to high 12's and trapping around 110.