With the Circle D 4c, my expectations in 2017 were to run better than my previous 11.56 @ 125 mph pass. So obviously, when I ran 11.50 @ 120 mph in fall air at the end of the year, I was disappointed. With the help of my tuner finding a broken hose clamp on the boost side of my supercharger, and the switch to E85, I was looking forward to racing again in 2018.
(Testing E85 prior to running at the track)
5/18 was the first available Friday I could race. I travel for work, so my race prep consisted of flying in to Medford on a delayed flight from Seattle, driving home, putting 5 gallons of E85 in my Mustang, and driving it straight to the track.
I lowered the car's Mickey Thompson ET drag radials to 20 psi, and made my first pass. I was very impressed to run a 10.85 @ 129 mph. My 60' has dropped dramatically with the converter, consistently in the 1.5X range. Prior to the Circle D converter, I had 60' times as bad as 2.0 with the Procharger, so this is a welcome change.
After some cool down time, the car was able to run a 10.73 @ 130, and a 10.81 @ 131. I am very impressed considering the DA that night was 3000'.
I would like to continue reducing weight from myself and the car during 2018, and tweaking the tune by working with my tuner on shiftpoints and confirming the E85 tune up is healthy. I wouldn't be surprised if my car has another tenth or two to drop during 2018.
