It was Englishtown's openning day and I went out
to test my new setup. We installed the Precision Industries torque
converter and the FJO wideband 02 datalogging kit. It was now time to test them out:
converter and the FJO wideband 02 datalogging kit. It was now time to test them out:
Racing parameters:
date: 2/28/2004
track: Englishtown,NJ
elvevation: 86 ft
air temp: ~70 F
humid: ~70%
barometer: ~30.1
total racing weight: 3630 lbs w/ driver(140 lbs) & accessories in trunk
fuel: 112 octane race gas, 1/4 tank
wheels/tires: 15x7.0 Volk TE-37's w/ 275 wide BFG drag radials @ 23 psi air
12.52 @ 110 run:
60 ft time: 1.91
launch boost: n/a
launch rpm: 2530, using foot brakes only
boost controller: set=65, gain=15
peak boost: 15 psi
shift points: "D" drive w/ overdrive "OFF"
AFC changes: no change
NOTES: Just a low boost shake down pass. Uneventful. But I forgot to press RECORD on the Defi gauges.
Sorry no boost movie. Also, notice the A/F raio is super rich.
12.20 @ 113 run:
60 ft time: 1.81
launch boost: n/a
launch rpm: 2770, using foot brakes & e-brake handle
boost controller: set=80, gain=15
peak boost: ~18 psi
shift points: "D" drive w/ overdrive "OFF"
AFC changes: no change
NOTES: Turned up the boost to what I normally run on 112 race gas. And this time I used the e-brake handle to get
a higher launch. But I didn't go too high yet. And on the launch, I didn't drop the e-brake right away. So it must have
held the car back slightly. But I still got a 1.81 60 foot time. And no AFC changes. 0% across the rpm range. Again,
super rich in the upper rpms. And I forgot to record the gauges again.
12.35 @ 113 run:
60 ft time: 1.95
launch boost: n/a
launch rpm: 3040, using foot brakes & e-brake handle
boost controller: set=80, gain=15
peak boost: ~18 psi
shift points: "D" drive w/ overdrive "OFF"
AFC changes: 4000 rpm -> 7000 rpm: 3% leaner
NOTES: I leaned out the A/F in the upper rpms for this run. But unfortunately I spun out the hole. I did a medium
size burnout. And as I rolled up to the staging lanes, the started stopeed me half way cause the car ahead of me
dripped fluid down the first 50 feet right down the center of the car lane. He spent 5 minutes cleaning it up and my
tires got cold. Therefore, I spun off the line w/ a worse 1.95 60 foot time. If you put in my 1.81 60 foot time in
place, that would have been at least a 12.21. And if you use the rules that a 0.10 gain in the 60 foot mean a 0.20 gain
in the elapsed time, then that would have been a 12.1 run. And also, notice the improvement in the A/F ratio.
12.47 @ 114 run:
60 ft time: 2.16
launch boost: 6 psi
launch rpm: 3010, using foot brakes & e-brake handle
14 psi boost @ rpm: 3740
boost controller: set=80, gain=15
peak boost: 18.5 ps
shift points: "D" drive w/ overdrive "OFF"
AFC changes: 4000 rpm -> 7000 rpm: 5% leaner
NOTES: I leaned it out even more. This time 5% leaner from baseline zero % on the AFC. But I blew my launch.
I took the rpms to 3100 and the rear wheels started spinning. And the car lurched forward and broke the starting beam.
I backed off the gas all the way to 2460 rpms and quickly got the rpms back up to 3000 and quickly launched. By the
time I got to the 60 foot mark, it was a crappy 2.16 time. Again, if you swap in the 1.81 60 foot time, it would net
a 12.12 run. But I did gain another mph to now a 114 with the even better A/F. That might have been an 11 sec run!
Also, I have a movie of the boost & rpm playback from the Defi gauges. I remembered this time.