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The best way I found figuring out shift points in the past was using a GTech. I gained 1.5 mph in the 1/4 (at a real track) using the g-force data provided by the GTech by changing my shift points between 150-200rpm.
There are probably modern apps nowadays that can help with that.
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1969 Pro-Touring MaCh 1 - CHP 427w 10.8 comp - 3140 lbs. - 460 rwhp / 490 rwtq
T56 Magnum || 14" 6 piston front / 13" 4 piston rear Wilwood brakes || Hydraulic clutch || 9" Detroit Locker || TCP Coilovers || Forgeline Wheels 18x10 275/35 front, 19x12 325/30 rear |