checking out new exhaust at drag strip

[aafc]

After installing the lt1 exhaust mufflers i made a trip to the drag strip
on fun day sunday ( (April 3,2016). Made three runs,all runs are with the
3" cutout's fully open.
Run #1
60 ft. 1.755 1/8 7.602 mph 94.34 1/4 11.789 mph 118.13
Run #2
60 ft. 1.756 1/8 7.589 mph 94.45 1/4 11.771 mph 118.00
Run#3
60 ft. 1.767 1/8 7.620 mph 94.36 1/4 1180.5 mph 117.11
First 2 runs tires set @ 26 lbs. Air temp 82 to84 deg.
Last run tires set @25 lbs. air temp about 89 deg.
left track had some honey do's to do the rest of the day.

Went back to the track on April 6, 2016. On Sunday i did not have time
to test the exhaust fully closed and open.
Runs #1 and 2 are with exhaust fully closed. tire @ 26 lbs
Runs #3 and 4 are with exhaust fully open. tire @ 26 lbs.

Run #1
60 ft. 1.744 1/8 7.620 mph 93.38 1/4 11.855 mph 116.22
Run #2
60 ft. 1.757 1/8 7.626 mph 93 34 1/4 11.868 mph 114.92
Run #3
60 ft. 1.733 1/8 7.538 mph 94.61 1/4 11724 mph 117.75
Run #4
60 ft. 1.719 1/87.507 mph 94.79 1/4 11.675 mph 118.16

With exhaust fully open gives the best times in 1/4 mile.
But in 1/8 mile almost the same times .
In the last 1/8 is were the ZR-1 comes on strong.
Air temp were in the mid 70's with a chill in the air.
The last run the car felt a little loose ( 8 pm ) . we left the track @ 10 pm
and ran into rain on the way home.

John
1990 white/black #2546
one of a few auto (4l80E ) eq. ZR-1's