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was curious how much gain i could expect changing rear gears to 3.55 or 3.91 i have 3.23 now 69 roadrunner 4-speed 28in tire 440 510 hp/ 540 tq flywheel 310 hp/ 415 tq rear wheel 4400, redline thought would have done better but dyno crew says my rear gear is killing it,




Might be interesting to see what the 1/4-mile trap MPH is, then plug the numbers into an online calculator. As Larry Shepard used to say: "Drag strip dyno".

Rick