Any ideas where to start? 99Z 6speed, I can make 4 or 5 runs at the strip and each pass my et's decrease by at least by about 2 tenths give or take a little. Maybe I'm just not waiting long enough between passes or just usual performance from a higher mileage car? I usually have about 10-15 minutes between passes. Might not be related but I never had this issue before using the Hypertech programmer.

 

Are the 60' times consistant? Trap speed?

 

trap speeds vary up to about 6 to 7 mph. 60 ft times and reaction times have almost no difference. 0.05 or so

 

first run was 13.10 @106, last run was 13.30 @ 98 - these numbers are from the last time I ran the car in Jan. Its not the worst problem in the world just curious about the decline in the numbers.

 

i heard 99's had a problem with the hoses on the clutch when the fluid gets warm it will not engage the clutch fast enough causing slipping. try launching 3 or 4 times back to back after the 3rd or 4th the pedel will stay on the floor!!! the fix is to drill out the restrictive fitting on the hose end the problem was corrected at the factory for the 00 model z's and c5's