67 Dart 270...Project Old School

I finally got back to the track with a working shifter to get some comparative data between the A500 and the 904 that it replaced. The A500 was setup non lockup and the same Edge Racing 9.5" torque converter was used with both transmissions. The engine tune was the same (timing, carb jetting), same 3.91 gear ratio, same Riken Raptors 255x17 tires on the back.

NEW INFORMATION:
904 Dry weight 103 lbs
A500 Dry weight 147 lbs

Changes to the car included swapping in the A500 itself (+ 44 lbs) adding a sub box in the trunk (+25 lbs) removing the AC/Heater box from under the dash (- 35 lbs) and removing the console (-20 lbs) which results in a total additional weight of 14 lbs. The 14 lbs is would only result in a .014 second penalty and .14 MPH penalty. Hardly worth noting in this case.

2014 - 904..........2015 - A500
...............1st Pass
60ft 1.867.............60ft 1.887
330ft 5.390..........330ft 5.518
660ft 8.348..........660ft 8.568
MPH 82.99............MPH 80.32
1000 10.915........1000 11.228
1/4 13.093.............1/4 13.493
MPH 103.55..........MPH 99.51

...............2nd Pass
60ft 1.878.............60ft 1.861
330ft 5.368..........330ft 5.461
660ft 8.309..........660ft 8.494
MPH 83.40...........MPH 80.69
1000 10.860........1000 11.140
1/4 13.024............1/4 13.394
MPH 104.35..........MPH 99.82

................3rd Pass
60ft 1.880.............60ft 1.861
330ft 5.369..........330ft 5.466
660ft 8.306..........660ft 8.500
MPH 83.57...........MPH 80.61
1000 10.854.......1000 11.145
1/4 13.016...........1/4 13.398
MPH 104.42.........MPH 100.00


...............4th Pass
60ft 1.887**..............60ft 1.846
330ft 5.342**...........330ft 5.440
660ft 8.252**...........660ft 8.472
MPH 84.33**............MPH 80.68
1000 10.775**........1000 11.117
1/4 12.913**.............1/4 13.367
MPH 105.61**..........MPH 100.17

** in 2014 I removed 100 LBS before the last pass by emptying the trunk.

Just looking at the numbers above and focusing on the first 3 passes, it looks like the additional power to turn the A500 cost me about .40 seconds and 4.0 MPH in the 1/4 mile even after you factor out the weight change. I guess it just bugs me more because it pushed my car out of the 12s and back into the 13s.