Took the car to Island Dragway for the annual track rental on 10/24/25. I had a few goals in mind for the day, but also had to run around a bunch making sure the event was going good. One of my goals was to get at least 10 passes on the day.
I also wanted to see if I could get the Hoosiers to get me a new all-motor pb in the 1/4 mile and possibly a good 1/8th mile nitrous time. From several previous dragstrips sessions I am fully aware that the 27" Hoosier puts me wayyyy out of rpms on the top end when I am on the bottle, so I can't make full quarter mile pases on them. I've struggled with them on the launch at times, and other times they have done pretty good. (still, my best 60 foots have all been with the 28" MT radial). Nonetheless, I got to the track and right away put the Hoosiers on AND at the same time adjusted the rear LCA's to be up higher. This was accomplished by moving the rear mounting point up by one bolt hole on the LCA axle mount, which too the angle of the bar to be 0 degrees or perfectly level. Typically they are 3 degrees downhill when on the next lowest bolt hole.
I wanted to experiment again with the shift points, also planning on allowing the trans to shift itself. D.A was great all day, with negative numbers during our arrival and low 200 and 300 numbers mid-afternoon. I had 94 octane Sunoco pump gas in the tank and I had no octane booster all day, even with the nitrous passes.
Pass 1:
Rear tires set at 16.6 psi each, rear koni yellows set at 1.5 each (soft-ish), 35 degrees timing on every all motor pass. Ambient temp was 53 deg with a D.A. of 206
Footbraked to 1894 rpms, slight spin on the launch with converter flashing to 4762 rpms. I shifted out of first at 6441, made the 2-3 shift at 6264, and towards the backhalf of the track watched rpms climb up high while backing off the throttle.
Timeslip and Datalog:
Video:
https://www.youtube.com/watch?v=LYDhBaht_gA
Pass 2:
Kept everything the same for shock and tire pressure settings. Footbrake launch at 2274 rpms and the car launched pretty good but with a little tire slip and flashed the converter to 4604 rpms. I REALLY short shifted the 1-2 shift at 5630 rpms, but let 2nd gear climb up to 6386 rpms before shifting it into 3rd and again, backing off the throttle (bright green line on upper parts of datalog) and crossing the finish line at 6196 rpms. Surprisingly, this was a new PB for the car all motor, improving on its previous best from last year's rental of 11.55 at 115.5 mph.
Timeslip and datalog:
Video:
https://www.youtube.com/watch?v=TLN42nBBFL4
Pass 3.
I wanted to see if I could repeat that run but with a better launch and quicker sixty foot so I softened the koni shocks by a very little on both sides. Footbrake launch at 2090 rpms and the little tire slip was still there. Converter flashed to 4538 rpms and I shifted out of first at 5911 rpms which is generally early, but not as early as the previous pass. I made the 2-3 shift at 6281 rpms and went to grab converter lockup but it was not there, so I quickly decided to make the 3-4 shift (not a great idea but I've done it a few dozen times). I didn't want to have to back off the throttle as much as the past two runs, so I shifted out of 3rd at 6055 and it dropped to 4823 rpms in overdrive! Crossed the finish line at 6060 rpms and did not expect a good timeslip at all, but this one now stands at second best for the car all-motor! wild
Timeslip and Datalog:
Video:
https://www.youtube.com/watch?v=rTma91-l-Qw
Pass 4. Tried going up to 17.6 psi in the rear Hoosier bias-ply tires for this pass. Went slower in the sixty foot, some spin after the footbrake launch of 2880 rpms. Converter flashed to 4804 and I shifted out of first at 6016 rpms, again, a bit lower than I usually shift it. Second gear I also shifted early, at 5869 rpms and again had no lockup under WOT so I stayed in 3rd while backing down on the throttle a little bit, to cross the finish line at 6260 rpms.
Timeslip and Datalog:
Video:
https://www.youtube.com/watch?v=2EJakuEB12Q
Pass 5.
I turned the nitrous on for this pass, and despite not having the best time launching with the Hoosiers, they did net me 3 of my best all-motor passes so I wanted to see if they could get me a quick 1/8th mile nitrous pass before running out of rpms at 1000 foot downtrack. Bottle pressure at 950 psi, using 30 degrees of timing for the 150 wet shot and did NOT add any race-gas or octane booster this time, totally forgot to pour it in the tank all day! I footbraked from a low 1623 rpms and the car launched pretty good actually! the converter flashed at 4948 rpms, but 1st gear winged up real fast and I found myself shifting at 6488 rpms which is wayyy too high. I took 2nd gear to 6319 rpms before shifting into 3rd. I didn't bother trying the lockup in 3rd gear again, so this left me getting off the nitrous button for a period of time and then kinda easily cruised the rest of the way down the track.
Datalog and Timeslip:
Video:
https://www.youtube.com/watch?v=oKmTtuJeJio