Read all the blah blah physics about unspung weight and rotating mass.
Estimated 2950 pound ( with 250 pound me in it) car currently runs 10.84 @ 123+, dropping a total of 60 pounds, 20 from each front and 10 from each rear plus going to M/T ET fronts that are 27.5 x 4.5 from a 205/65R15 radial. Also reduced my free travel another 1.5" since the Rocky has been wheelie prone. 60' are a slow ( but controllable) 1.58 and it runs 6.90 flat in the 1/8th at just over 100.
Cant wait until spring to run it.... 'physics' calcs say about 2 tenths but im not convinced....though i Remember my Charger picked up over 2/10th going from steelies to mu first set of weld Ultralites.
that thing is cool.. anyway. My old 67 Coronet (3850lbs) had heavy cragars all the way around. I replaced the rears w/ 15x7 stelies and the fronts w/ 14x5.5 steelies with smaller tires. I believe the the total savings was 45lbs up front and 30something out back. The car ran 12.90 w/ the Cragars and 12.90 w/ the lighter wheels w/ the same MPH (104)
