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| 1/8th mile, wjajr's ’67 Dart GT Ragtop https://slantsix.org/forum/viewtopic.php?t=50084 |
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| Author: | wjajr [ Sun Oct 14, 2012 7:03 pm ] |
| Post subject: | 1/8th mile, wjajr's ’67 Dart GT Ragtop |
June 10, 2010: An update to modifications made to my 225, 67 Dart rag top: Oversized ENDG valves, ported, gasket matched, and shaved 0.075†calculated 9.5:1 compression peanut head. Clifford intake & shorty headers, Holley 390 4V carburetor. Dual exhaust. Bored over 0.030†block. Unknown hot cam that loves 3000 to 5000 rpm. Orange box, blaster II coil. 904 driven by a 2600 (on paper) stall converter. (Seams to lock up @2200) 3.55:1 8 ¾†Suregrip, D70/14 T/A’s. Haven’t weighed the car, but is most likely on the heavy side north of 3100 pounds (+ 220# for me) because of; HD suspension, anti sway bar, sub frame connectors, 8 3/4†rear, and sound deadening on floor. Nor has it seen a dyno, so I don’t know what the torque, and power curves look like. [img]http://i294.photobucket.com/albums/mm87/wjajr/1967%20Dart/100_0682-1.jpg[/img] All runs made at Winterport Dragway’s 1/8th mile track, elevation ~160 ft. _____________________________________ June 12, 2010: Shift automatically in D @ 4000 rpm. Run 1 Reaction time = 1.165 sec. 660’ - 10.752 sec @ 62.15 mph. Run 2 Reaction time = 0.973 660’ – 10.752 sec @ 63.47 mph. Oct. 2, 2010 Shift @ 5000 Run 1 Reaction time = 1.134 sec. 660’ – 10.67 @ 64.56 mph _______________________ Jan 2011 Degreed “Mystery†cam Lift at valve Exh= 0.460â€; I = 0.444†211 degree center line Exh @ 113 degrees, I @ 99degrees Exh @ 0.050†= 236* I @ 0.050†= 235* Overlap @ 0.050†= 23* _____________________ Summer 2012 Installed o2 sensor. Tuned carburetor jetting etc., discovered secondary’s were not operational, and corrected that problem. Car became a lot more responsive. ___________________________ Oct. 13, 2012 6000 rpm shift One run Reaction; a comatose 1.229 sec. 60 foot @ 2.336 sec. 660 ft. @ 6.736 sec. 67.95 mph. 660 ft. @ 10.352 sec. Finish line was reached while still in second gear below 6000 rpm So long story short comparing Oct. 2010 outing with today’s 60’ shaved 0.072 seconds 660’ shaved 0.196 seconds 3.39 mph faster 1/8th mile: shaved off from June 2010 first run; 0.400 seconds to date. ________________________________________ This winter: more compression to be added. |
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