New PBT at the Track
I forgot to post my new PBT with the Tempest at this years FAST race at Martin US131 Raceway Park this past May 10th. I drove the car to the track this time, instead of trailering it (130 miles round trip) and didn't touch it, other than adding 5 gallons of 110 race fuel. The weather was cool (63 degrees) and dry, but with a headwind out of the north of 15-20 mph. This was a last minute decision to go, so we promptly forgot our carb kits with all the secondary metering rods & jets, spark plugs, and the corresponding 13/16” socket (we could of sworn it was in there…!). So, the spark plugs (AC-R45S) that were in it for the dyno session back in 2019 and 2022 FAST race stayed in it. We didn’t touch the timing, but did check it…38 degrees, dwell was fine. The DA was around 1300’ despite the cool temps.
We were just there for the day and the Tempest ran a best of 13.151 at 102.79 mph into the headwind. Ran a 13.20 earlier. It only turns 4800 rpm through the traps with the 3.42 gears. It really needs some 3.73’s or 3.90’s, a looser front end, and loose 150 lbs. to run quicker. The TH400 upshifts automatically at 5600 rpm and ran 185 degrees max on the drive.
Dennis
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