axle swap time how capable is a std crownwheel and pinion

[NoHachi]

Problem is that you'll have a hard time lowering the cars mass by anything significant in practice.. I know people will fall over me saying this, but please show me the the scale readouts proving it.

A low power tuned 4ag streetcar (<200hp) will shave some kg's/lbs but those are hardly the ones munching axles.

For track/drift you add 40-60kgs of cage, for torque you add 50kgs worth of intercoolers, turbo's, compressors or blocks. Weight balance will probably be better with a bigger rear axle if you go for big torque.